Dawn change to enable writeBuffer for size != multiple of 4

WebGPU: HelloTraingle hacks
Co-authored-by: Andy Hovingh <6198728+AndyHovingh@users.noreply.github.com>
2025-05-06 14:07:05 -04:00 · 2025-05-06 14:07:05 -04:00 · 2025-05-06 14:06:53 -04:00 · 2025-05-06 13:22:33 -04:00 · 2025-05-06 12:24:42 -04:00 · 2025-05-06 12:24:42 -04:00
57 changed files with 1854 additions and 669 deletions
@@ -31,7 +31,7 @@ repositories {
 }
 dependencies {
-    implementation 'com.google.android.filament:filament-android:1.59.3'
+    implementation 'com.google.android.filament:filament-android:1.59.4'
 }
 ```
@@ -51,7 +51,7 @@ Here are all the libraries available in the group `com.google.android.filament`:
 iOS projects can use CocoaPods to install the latest release:
 ```shell
-pod 'Filament', '~> 1.59.3'
+pod 'Filament', '~> 1.59.4'
 ```
 ## Documentation
@@ -7,6 +7,9 @@ A new header is inserted each time a *tag* is created.
 Instead, if you are authoring a PR for the main branch, add your release note to
 [NEW_RELEASE_NOTES.md](./NEW_RELEASE_NOTES.md).
 ## v1.59.5
 ## v1.59.4
@@ -1980,7 +1980,7 @@ public class View {
        }
        /**
-         * reconstruction filter width typically between 0.2 (sharper, aliased) and 1.5 (smoother)
+         * reconstruction filter width typically between 1 (sharper) and 2 (smoother)
         */
        public float filterWidth = 1.0f;
        /**
@@ -1,5 +1,5 @@
 GROUP=com.google.android.filament
-VERSION_NAME=1.59.3
+VERSION_NAME=1.59.4
 POM_DESCRIPTION=Real-time physically based rendering engine for Android.
@@ -166,7 +166,7 @@ This document is part of the <a href="https://github.com/google/filament">Filame
 </p><ul>
 <li class="minus"><a href="https://github.com/romainguy">Romain Guy</a>, <a href="https://twitter.com/romainguy">@romainguy</a>
 </li>
-<li class="minus"><a href="https://github.com/pixelflinger">Mathias Agopian</a>, <a href="https://twitter.com/darthmoosious">@darthmoosious</a></li></ul>
+<li class="minus"><a href="https://github.com/pixelflinger">Mathias Agopian</a>, <a href="https://bsky.app/profile/pixelflinger.bsky.social">@pixelflinger</a></li></ul>
 <p></p>
 <a class="target" name="overview">&nbsp;</a><a class="target" name="overview">&nbsp;</a><a class="target" name="toc2">&nbsp;</a><h1>Overview</h1>
@@ -259,26 +259,27 @@ in <a href="#table_standardproperties">table&nbsp;1</a>.
 </p><div class="table">
 <table class="table"><tbody><tr><th style="text-align:right"> Property </th><th style="text-align:left"> Definition </th></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">baseColor</strong> </td><td style="text-align:left"> Diffuse albedo for non-metallic surfaces, and specular color for metallic surfaces </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">metallic</strong> </td><td style="text-align:left"> Whether a surface appears to be dielectric (0.0) or conductor (1.0). Often used as a binary value (0 or 1) </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">roughness</strong> </td><td style="text-align:left"> Perceived smoothness (1.0) or roughness (0.0) of a surface. Smooth surfaces exhibit sharp reflections </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">metallic</strong> </td><td style="text-align:left"> Whether a surface appears to be dielectric (0.0) or conductor (1.0). Often used as a binary value (0 or 1) </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">reflectance</strong> </td><td style="text-align:left"> Fresnel reflectance at normal incidence for dielectric surfaces. This directly controls the strength of the reflections </td></tr>
-<tr><td style="text-align:right"> <strong class="asterisk">sheenColor</strong> </td><td style="text-align:left"> Strength of the sheen layer </td></tr>
+<tr><td style="text-align:right"> <strong class="asterisk">ambientOcclusion</strong> </td><td style="text-align:left"> Defines how much of the ambient light is accessible to a surface point. It is a per-pixel shadowing factor between 0.0 and 1.0 </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">sheenRoughness</strong> </td><td style="text-align:left"> Perceived smoothness or roughness of the sheen layer </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">clearCoat</strong> </td><td style="text-align:left"> Strength of the clear coat layer </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">clearCoatRoughness</strong> </td><td style="text-align:left"> Perceived smoothness or roughness of the clear coat layer </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">clearCoatNormal</strong> </td><td style="text-align:left"> A detail normal used to perturb the clear coat layer using <em class="underscore">bump mapping</em> (<em class="underscore">normal mapping</em>) </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">anisotropy</strong> </td><td style="text-align:left"> Amount of anisotropy in either the tangent or bitangent direction </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">anisotropyDirection</strong> </td><td style="text-align:left"> Local surface direction in tangent space </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">ambientOcclusion</strong> </td><td style="text-align:left"> Defines how much of the ambient light is accessible to a surface point. It is a per-pixel shadowing factor between 0.0 and 1.0 </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">normal</strong> </td><td style="text-align:left"> A detail normal used to perturb the surface using <em class="underscore">bump mapping</em> (<em class="underscore">normal mapping</em>) </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">bentNormal</strong> </td><td style="text-align:left"> A normal pointing in the average unoccluded direction. Can be used to improve indirect lighting quality </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">clearCoatNormal</strong> </td><td style="text-align:left"> A detail normal used to perturb the clear coat layer using <em class="underscore">bump mapping</em> (<em class="underscore">normal mapping</em>) </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">emissive</strong> </td><td style="text-align:left"> Additional diffuse albedo to simulate emissive surfaces (such as neons, etc.) This property is mostly useful in an HDR pipeline with a bloom pass </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">postLightingColor</strong> </td><td style="text-align:left"> Additional color that can be blended with the result of the lighting computations. See <code>postLightingBlending</code> </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">ior</strong> </td><td style="text-align:left"> Index of refraction, either for refractive objects or as an alternative to reflectance </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">transmission</strong> </td><td style="text-align:left"> Defines how much of the diffuse light of a dielectric is transmitted through the object, in other words this defines how transparent an object is </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">absorption</strong> </td><td style="text-align:left"> Absorption factor for refractive objects </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">microThickness</strong> </td><td style="text-align:left"> Thickness of the thin layer of refractive objects </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">thickness</strong> </td><td style="text-align:left"> Thickness of the solid volume of refractive objects </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">sheenColor</strong> </td><td style="text-align:left"> Strength of the sheen layer </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">sheenRoughness</strong> </td><td style="text-align:left"> Perceived smoothness or roughness of the sheen layer </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">emissive</strong> </td><td style="text-align:left"> Additional diffuse albedo to simulate emissive surfaces (such as neons, etc.) This property is mostly useful in an HDR pipeline with a bloom pass </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">normal</strong> </td><td style="text-align:left"> A detail normal used to perturb the surface using <em class="underscore">bump mapping</em> (<em class="underscore">normal mapping</em>) </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">postLightingColor</strong> </td><td style="text-align:left"> Additional color that can be blended with the result of the lighting computations. See <code>postLightingBlending</code> </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">absorption</strong> </td><td style="text-align:left"> Absorption factor for refractive objects </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">transmission</strong> </td><td style="text-align:left"> Defines how much of the diffuse light of a dielectric is transmitted through the object, in other words this defines how transparent an object is </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">ior</strong> </td><td style="text-align:left"> Index of refraction, either for refractive objects or as an alternative to reflectance </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">microThickness</strong> </td><td style="text-align:left"> Thickness of the thin layer of refractive objects </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">bentNormal</strong> </td><td style="text-align:left"> A normal pointing in the average unoccluded direction. Can be used to improve indirect lighting quality </td></tr>
 <tr><td style="text-align:right"> <strong class="asterisk">shadowStrength</strong> </td><td style="text-align:left"> Strength factor between 0 and 1 for all shadows received by this material </td></tr>
 </tbody></table><center><div class="tablecaption"><a class="target" name="table_standardproperties">&nbsp;</a><b style="font-style:normal;">Table&nbsp;1:</b> Properties of the standard model</div></center></div>
 <p></p><p>
@@ -1486,10 +1487,13 @@ non-shader data.
 </p><dl><dt>Type</dt><dd><p>     array of parameter objects
 </p></dd><dt>Value</dt><dd><p>      Each entry is an object with the properties <code>name</code> and <code>type</code>, both of <code>string</code> type. The
-      name must be a valid GLSL identifier. Entries also have an optional <code>precision</code>, which can be
+      name must be a valid GLSL identifier. Entries have an optional <code>precision</code>, which can be
      one of <code>default</code> (best precision for the platform, typically <code>high</code> on desktop, <code>medium</code> on
      mobile), <code>low</code>, <code>medium</code>, <code>high</code>. The type must be one of the types described in
-      <a href="#table_materialparamstypes">table&nbsp;14</a>.
+      <a href="#table_materialparamstypes">table&nbsp;14</a>. For Android external textures, entries also have an optional 
      transformName parameter to specify the name of the material parameter that will be 
      used to expose the transform matrix associated with the external sampler. In iOS and Vulkan,
      this will always be identity. 
 </p></dd></dl><div class="table">
 <table class="table"><tbody><tr><th style="text-align:left"> Type </th><th style="text-align:left"> Description </th></tr>
@@ -1752,7 +1756,13 @@ non-shader data.
      when selecting any shading model that is not <code>unlit</code>. See the shader sections of this document
      for more information on how to access these attributes from the shaders.
-</p></dd></dl><p></p><pre class="listing tilde"><code><span class="line">material {</span>
+</p></dd></dl><div class="admonition note"><div class="admonition-title"> Interaction with custom variables</div>
 <p></p><p>
    When the <code>color</code> attribute is specified, only four custom variables are available instead of five.</p></div>
 <p></p><pre class="listing tilde"><code><span class="line">material {</span>
 <span class="line">    parameters : [</span>
 <span class="line">        {</span>
 <span class="line">           type : sampler2d,</span>
@@ -1779,7 +1789,7 @@ non-shader data.
 </p><dl><dt>Type</dt><dd><p>     array of <code>string</code>
-</p></dd><dt>Value</dt><dd><p>      Up to 4 strings, each must be a valid GLSL identifier.
+</p></dd><dt>Value</dt><dd><p>      Up to 5 strings, each must be a valid GLSL identifier.
 </p></dd><dt>Description</dt><dd><p>      Defines custom interpolants (or variables) that are output by the material's vertex shader.
      Each entry of the array defines the name of an  interpolant. The full name in the fragment
@@ -1794,7 +1804,14 @@ non-shader data.
      particular if <code>default</code> is specified the default precision is used is the fragment shader
      (<code>mediump</code>) and in the vertex shader (<code>highp</code>).
-</p></dd></dl><p></p><pre class="listing tilde"><code><span class="line">material {</span>
+</p></dd></dl><div class="admonition warning"><div class="admonition-title"> Interaction with required attributes</div>
 <p></p><p>
    If the <code>color</code> attribute is specified in the <code>required</code> list, then only four variables can be used
    instead of five.</p></div>
 <p></p><pre class="listing tilde"><code><span class="line">material {</span>
 <span class="line">    name : Skybox,</span>
 <span class="line">    parameters : [</span>
 <span class="line">        {</span>
@@ -49,7 +49,7 @@
 </tr>
 <tr>
 <td align="left"><a href="#EntityManager">EntityManager</a></td>
-<td align="left">Singleton used for constructing entities in Filament&#x27;s ECS.</td>
+<td align="left">Singleton used for constructing entities in Filament's ECS.</td>
 </tr>
 <tr>
 <td align="left"><a href="#Frustum">Frustum</a></td>
@@ -89,7 +89,7 @@
 </tr>
 <tr>
 <td align="left"><a href="#Renderer">Renderer</a></td>
-<td align="left">Represents the platform&#x27;s native window.</td>
+<td align="left">Represents the platform's native window.</td>
 </tr>
 <tr>
 <td align="left"><a href="#Scene">Scene</a></td>
@@ -97,7 +97,7 @@
 </tr>
 <tr>
 <td align="left"><a href="#SwapChain">SwapChain</a></td>
-<td align="left">Represents the platform&#x27;s native rendering surface.</td>
+<td align="left">Represents the platform's native rendering surface.</td>
 </tr>
 <tr>
 <td align="left"><a href="#Texture">Texture</a></td>
@@ -604,11 +604,11 @@
 </ul>
 <p>To create an entity with no components, use <a href="#EntityManager">EntityManager</a>.
 TODO: It would be better to expose these as JS numbers rather than as JS objects.
-This would also be more consistent with Filament&#x27;s Java bindings.</p>
+This would also be more consistent with Filament's Java bindings.</p>
 </div>
 <div class='classdoc'>
 <h2>class <a id='EntityManager' href='#EntityManager'>EntityManager</a></h2>
-<p>Singleton used for constructing entities in Filament&#x27;s ECS.</p>
+<p>Singleton used for constructing entities in Filament's ECS.</p>
 <ul>
 <li><strong>entityManager.create()</strong>
 <ul>
@@ -742,7 +742,7 @@ properties.</p>
 </ul>
 </li>
 </ul>
-<p>Be sure to call the instance&#x27;s <code>delete</code> method when you&#x27;re done with it.</p>
+<p>Be sure to call the instance's <code>delete</code> method when you're done with it.</p>
 </div>
 <div class='classdoc'>
 <h2>class <a id='PixelBufferDescriptor' href='#PixelBufferDescriptor'>PixelBufferDescriptor</a></h2>
@@ -780,11 +780,11 @@ properties.</p>
 </ul>
 </li>
 </ul>
-<p>Be sure to call the instance&#x27;s <code>delete</code> method when you&#x27;re done with it.</p>
+<p>Be sure to call the instance's <code>delete</code> method when you're done with it.</p>
 </div>
 <div class='classdoc'>
 <h2>class <a id='Renderer' href='#Renderer'>Renderer</a></h2>
-<p>Represents the platform&#x27;s native window.</p>
+<p>Represents the platform's native window.</p>
 <ul>
 <li><strong>renderer.render(swapChain, view)</strong>
 <ul>
@@ -803,7 +803,7 @@ properties.</p>
 </div>
 <div class='classdoc'>
 <h2>class <a id='SwapChain' href='#SwapChain'>SwapChain</a></h2>
-<p>Represents the platform&#x27;s native rendering surface.</p>
+<p>Represents the platform's native rendering surface.</p>
 <p>See also the <a href="#Engine">Engine</a> methods <code>createSwapChain</code> and <code>destroySwapChain</code>.</p>
 </div>
 <div class='classdoc'>
@@ -847,7 +847,7 @@ properties.</p>
 </ul>
 </li>
 </ul>
-<p>Be sure to call the instance&#x27;s <code>delete</code> method when you&#x27;re done with it.</p>
+<p>Be sure to call the instance's <code>delete</code> method when you're done with it.</p>
 </div>
 <div class='classdoc'>
 <h2>class <a id='VertexBuffer' href='#VertexBuffer'>VertexBuffer</a></h2>
@@ -944,7 +944,7 @@ See also the <a href="#Engine">Engine</a> methods <code>createView</code> and <c
 <ul>
 <li><strong>assets</strong>
 <ul>
-<li>Array of strings containing URL&#x27;s of required assets.</li>
+<li>Array of strings containing URL's of required assets.</li>
 </ul>
 </li>
 <li><strong>onDone</strong>
@@ -954,7 +954,7 @@ See also the <a href="#Engine">Engine</a> methods <code>createView</code> and <c
 </li>
 <li><strong>onFetched</strong>
 <ul>
-<li>optional callback that&#x27;s invoked after each asset is downloaded.</li>
+<li>optional callback that's invoked after each asset is downloaded.</li>
 </ul>
 </li>
 </ul>
@@ -1001,7 +1001,7 @@ useful for compressed textures. For example, some platforms accept ETC and other
 <ul>
 <li><strong>assets</strong>
 <ul>
-<li>Array of strings containing URL&#x27;s of required assets.</li>
+<li>Array of strings containing URL's of required assets.</li>
 </ul>
 </li>
 <li><strong>onready</strong>
@@ -1010,12 +1010,12 @@ useful for compressed textures. For example, some platforms accept ETC and other
 </ul>
 </li>
 </ul>
-<p>All JavaScript clients must call the init function, passing in a list of asset URL&#x27;s and a
+<p>All JavaScript clients must call the init function, passing in a list of asset URL's and a
 callback. This callback gets invoked only after all assets have been downloaded and the Filament
-WebAssembly module has been loaded. Clients should only pass asset URL&#x27;s that absolutely must
+WebAssembly module has been loaded. Clients should only pass asset URL's that absolutely must
 be ready at initialization time.
 When the callback is called, each downloaded asset is available in the <code>Filament.assets</code> global
-object, which contains a mapping from URL&#x27;s to Uint8Array objects.</p>
+object, which contains a mapping from URL's to Uint8Array objects.</p>
 </div>
 <div class='funcdoc'>
 <h2>function <a id='loadMathExtensions' href='#loadMathExtensions'>loadMathExtensions</a>()</h2>
@@ -10,7 +10,7 @@
 textures.</p>
 <p>For starters, create a text file called <code>redball.html</code> and copy over the HTML that we used in the
 <a href="tutorial_triangle.html">previous tutorial</a>. Change the last script tag from <code>triangle.js</code> to <code>redball.js</code>.</p>
-<p>Next you&#x27;ll need to get a couple command-line tools: <code>matc</code> and <code>cmgen</code>. You can find these in the
+<p>Next you'll need to get a couple command-line tools: <code>matc</code> and <code>cmgen</code>. You can find these in the
 appropriate <a href="//github.com/google/filament/releases">Filament release</a>. You should choose the
 archive that corresponds to your development machine rather than the one for web, and the version
 that matches the <code>unpkg.com/filament@x.x.x</code> url in the script tag of <code>redball.html</code> (you may check
@@ -19,7 +19,7 @@ out the last available release of <a href="https://www.npmjs.com/package/filamen
 <p>The <code>matc</code> tool consumes a text file containing a high-level description of a PBR material, and
 produces a binary material package that contains shader code and associated metadata. For more
 information, see the official document describing the <a href="https://google.github.io/filament/Materials.md.html">Filament Material System</a>.</p>
-<p>Let&#x27;s try out <code>matc</code>. Create the following file in your favorite text editor and call it
+<p>Let's try out <code>matc</code>. Create the following file in your favorite text editor and call it
 <code>plastic.mat</code>.</p>
 <div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>material {
    name : Lit,
@@ -44,16 +44,16 @@ fragment {
 </pre></div>
 <p>Next, invoke <code>matc</code> as follows.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>matc -a opengl -p mobile -o plastic.filamat plastic.mat
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>matc<span style="color: #BBB"> </span>-a<span style="color: #BBB"> </span>opengl<span style="color: #BBB"> </span>-p<span style="color: #BBB"> </span>mobile<span style="color: #BBB"> </span>-o<span style="color: #BBB"> </span>plastic.filamat<span style="color: #BBB"> </span>plastic.mat
 </pre></div>
-<p>You should now have a material archive in your working directory, which we&#x27;ll use later in the
+<p>You should now have a material archive in your working directory, which we'll use later in the
 tutorial.</p>
 <h2>Bake environment map</h2>
-<p>Next we&#x27;ll use Filament&#x27;s <code>cmgen</code> tool to consume a HDR environment map in latlong format, and
+<p>Next we'll use Filament's <code>cmgen</code> tool to consume a HDR environment map in latlong format, and
 produce two cubemap files: a mipmapped IBL and a blurry skybox.</p>
 <p>Download <a href="//github.com/google/filament/blob/main/third_party/environments/pillars_2k.hdr">pillars_2k.hdr</a>, then invoke the following command in your terminal.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>cmgen -x pillars_2k --format<span style="color: #666666">=</span>ktx --size<span style="color: #666666">=256</span> --extract-blur<span style="color: #666666">=0</span>.1 pillars_2k.hdr
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>cmgen<span style="color: #BBB"> </span>-x<span style="color: #BBB"> </span>pillars_2k<span style="color: #BBB"> </span>--format<span style="color: #666">=</span>ktx<span style="color: #BBB"> </span>--size<span style="color: #666">=256</span><span style="color: #BBB"> </span>--extract-blur<span style="color: #666">=0</span>.1<span style="color: #BBB"> </span>pillars_2k.hdr
 </pre></div>
 <p>You should now have a <code>pillars_2k</code> folder containing a couple KTX files for the IBL and skybox, as
@@ -61,84 +61,84 @@ well as a text file with spherical harmonics coefficients. You can discard the t
 IBL KTX contains these coefficients in its metadata.</p>
 <h2>Create JavaScript</h2>
 <p>Next, create <code>redball.js</code> with the following content.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>environ<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">&#39;pillars_2k&#39;</span>;<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>environ<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">&#39;pillars_2k&#39;</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ibl_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_ibl.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ibl_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_ibl.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>sky_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_skybox.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>sky_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_skybox.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>filamat_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">&#39;plastic.filamat&#39;</span><span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>filamat_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">&#39;plastic.filamat&#39;</span>
-Filament.init([<span style="color: #bbbbbb"> </span>filamat_url,<span style="color: #bbbbbb"> </span>ibl_url,<span style="color: #bbbbbb"> </span>sky_url<span style="color: #bbbbbb"> </span>],<span style="color: #bbbbbb"> </span>()<span style="color: #bbbbbb"> </span>=&gt;<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+Filament.init([<span style="color: #BBB"> </span>filamat_url,<span style="color: #BBB"> </span>ibl_url,<span style="color: #BBB"> </span>sky_url<span style="color: #BBB"> </span>],<span style="color: #BBB"> </span>()<span style="color: #BBB"> </span>=&gt;<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">  </span><span style="color: #3D7B7B; font-style: italic">// Create some global aliases to enums for convenience.</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #3D7B7B; font-style: italic">// Create some global aliases to enums for convenience.</span>
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.VertexAttribute<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.VertexAttribute;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.VertexAttribute<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.VertexAttribute;
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.AttributeType<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.VertexBuffer$AttributeType;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.AttributeType<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.VertexBuffer$AttributeType;
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.PrimitiveType<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.RenderableManager$PrimitiveType;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.PrimitiveType<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.RenderableManager$PrimitiveType;
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.IndexType<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.IndexBuffer$IndexType;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.IndexType<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.IndexBuffer$IndexType;
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.Fov<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Camera$Fov;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.Fov<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Camera$Fov;
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.LightType<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.LightManager$Type;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.LightType<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.LightManager$Type;
-<span style="color: #bbbbbb">  </span><span style="color: #3D7B7B; font-style: italic">// Obtain the canvas DOM object and pass it to the App.</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #3D7B7B; font-style: italic">// Obtain the canvas DOM object and pass it to the App.</span>
-<span style="color: #bbbbbb">  </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>canvas<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">document</span>.getElementsByTagName(<span style="color: #BA2121">&#39;canvas&#39;</span>)[<span style="color: #666666">0</span>];<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>canvas<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">document</span>.getElementsByTagName(<span style="color: #BA2121">&#39;canvas&#39;</span>)[<span style="color: #666">0</span>];
-<span style="color: #bbbbbb">  </span><span style="color: #008000">window</span>.app<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>App(canvas);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000">window</span>.app<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>App(canvas);
-}<span style="color: #bbbbbb"> </span>);<span style="color: #bbbbbb"></span>
+}<span style="color: #BBB"> </span>);
-<span style="color: #008000; font-weight: bold">class</span><span style="color: #bbbbbb"> </span>App<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">class</span><span style="color: #BBB"> </span>App<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">  </span><span style="color: #008000; font-weight: bold">constructor</span>(canvas)<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000; font-weight: bold">constructor</span>(canvas)<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.canvas<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>canvas;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.canvas<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>canvas;
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>engine<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Engine.create(canvas);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>engine<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Engine.create(canvas);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>scene<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createScene();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>scene<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createScene();
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create material</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create material</span>
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create sphere</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create sphere</span>
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create lights</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create lights</span>
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create IBL</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create IBL</span>
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create skybox</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create skybox</span>
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.swapChain<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createSwapChain();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.swapChain<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createSwapChain();
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.renderer<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createRenderer();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.renderer<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createRenderer();
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.camera<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createCamera(Filament.EntityManager.get().create());<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.camera<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createCamera(Filament.EntityManager.get().create());
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.view<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createView();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.view<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createView();
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.view.setCamera(<span style="color: #008000; font-weight: bold">this</span>.camera);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.view.setCamera(<span style="color: #008000; font-weight: bold">this</span>.camera);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.view.setScene(scene);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.view.setScene(scene);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.resize();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.resize();
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.render<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.render.bind(<span style="color: #008000; font-weight: bold">this</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.render<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.render.bind(<span style="color: #008000; font-weight: bold">this</span>);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.resize<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.resize.bind(<span style="color: #008000; font-weight: bold">this</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.resize<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.resize.bind(<span style="color: #008000; font-weight: bold">this</span>);
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.addEventListener(<span style="color: #BA2121">&#39;resize&#39;</span>,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.resize);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.addEventListener(<span style="color: #BA2121">&#39;resize&#39;</span>,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.resize);
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-<span style="color: #bbbbbb">  </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>}
-<span style="color: #bbbbbb">  </span>render()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>render()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>eye<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">4</span>],<span style="color: #bbbbbb"> </span>center<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>],<span style="color: #bbbbbb"> </span>up<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>];<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>eye<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">4</span>],<span style="color: #BBB"> </span>center<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>],<span style="color: #BBB"> </span>up<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>];
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>radians<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">Date</span>.now()<span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">10000</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>radians<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">Date</span>.now()<span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">10000</span>;
-<span style="color: #bbbbbb">    </span>vec3.rotateY(eye,<span style="color: #bbbbbb"> </span>eye,<span style="color: #bbbbbb"> </span>center,<span style="color: #bbbbbb"> </span>radians);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>vec3.rotateY(eye,<span style="color: #BBB"> </span>eye,<span style="color: #BBB"> </span>center,<span style="color: #BBB"> </span>radians);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.camera.lookAt(eye,<span style="color: #bbbbbb"> </span>center,<span style="color: #bbbbbb"> </span>up);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.camera.lookAt(eye,<span style="color: #BBB"> </span>center,<span style="color: #BBB"> </span>up);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.renderer.render(<span style="color: #008000; font-weight: bold">this</span>.swapChain,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.view);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.renderer.render(<span style="color: #008000; font-weight: bold">this</span>.swapChain,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.view);
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-<span style="color: #bbbbbb">  </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>}
-<span style="color: #bbbbbb">  </span>resize()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>resize()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>dpr<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.devicePixelRatio;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>dpr<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.devicePixelRatio;
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>width<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.width<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.innerWidth<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span>dpr;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>width<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.width<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.innerWidth<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span>dpr;
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>height<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.height<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.innerHeight<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span>dpr;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>height<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.height<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.innerHeight<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span>dpr;
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.view.setViewport([<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>width,<span style="color: #bbbbbb"> </span>height]);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.view.setViewport([<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>width,<span style="color: #BBB"> </span>height]);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.camera.setProjectionFov(<span style="color: #666666">45</span>,<span style="color: #bbbbbb"> </span>width<span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span>height,<span style="color: #bbbbbb"> </span><span style="color: #666666">1.0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">10.0</span>,<span style="color: #bbbbbb"> </span>Fov.VERTICAL);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.camera.setProjectionFov(<span style="color: #666">45</span>,<span style="color: #BBB"> </span>width<span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span>height,<span style="color: #BBB"> </span><span style="color: #666">1.0</span>,<span style="color: #BBB"> </span><span style="color: #666">10.0</span>,<span style="color: #BBB"> </span>Fov.VERTICAL);
-<span style="color: #bbbbbb">  </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>}
-}<span style="color: #bbbbbb"></span>
+}
 </pre></div>
 <p>The above boilerplate should be familiar to you from the previous tutorial, although it loads in a
 new set of assets. We also added some animation to the camera.</p>
-<p>Next let&#x27;s create a material instance from the package that we built at the beginning the tutorial.
+<p>Next let's create a material instance from the package that we built at the beginning the tutorial.
 Replace the <strong>create material</strong> comment with the following snippet.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>material<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createMaterial(filamat_url);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>material<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createMaterial(filamat_url);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>matinstance<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>material.createInstance();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>matinstance<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>material.createInstance();
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>red<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0.8</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.0</span>];<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>red<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0.8</span>,<span style="color: #BBB"> </span><span style="color: #666">0.0</span>,<span style="color: #BBB"> </span><span style="color: #666">0.0</span>];
-matinstance.setColor3Parameter(<span style="color: #BA2121">&#39;baseColor&#39;</span>,<span style="color: #bbbbbb"> </span>Filament.RgbType.sRGB,<span style="color: #bbbbbb"> </span>red);<span style="color: #bbbbbb"></span>
+matinstance.setColor3Parameter(<span style="color: #BA2121">&#39;baseColor&#39;</span>,<span style="color: #BBB"> </span>Filament.RgbType.sRGB,<span style="color: #BBB"> </span>red);
-matinstance.setFloatParameter(<span style="color: #BA2121">&#39;roughness&#39;</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.5</span>);<span style="color: #bbbbbb"></span>
+matinstance.setFloatParameter(<span style="color: #BA2121">&#39;roughness&#39;</span>,<span style="color: #BBB"> </span><span style="color: #666">0.5</span>);
-matinstance.setFloatParameter(<span style="color: #BA2121">&#39;clearCoat&#39;</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1.0</span>);<span style="color: #bbbbbb"></span>
+matinstance.setFloatParameter(<span style="color: #BA2121">&#39;clearCoat&#39;</span>,<span style="color: #BBB"> </span><span style="color: #666">1.0</span>);
-matinstance.setFloatParameter(<span style="color: #BA2121">&#39;clearCoatRoughness&#39;</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.3</span>);<span style="color: #bbbbbb"></span>
+matinstance.setFloatParameter(<span style="color: #BA2121">&#39;clearCoatRoughness&#39;</span>,<span style="color: #BBB"> </span><span style="color: #666">0.3</span>);
 </pre></div>
-<p>The next step is to create a renderable for the sphere. To help with this, we&#x27;ll use the <code>IcoSphere</code>
+<p>The next step is to create a renderable for the sphere. To help with this, we'll use the <code>IcoSphere</code>
 utility class, whose constructor takes a LOD. Its job is to subdivide an icosadedron, producing
 three arrays:</p>
 <ul>
@@ -147,137 +147,137 @@ three arrays:</p>
 as quaternions.</li>
 <li><code>icosphere.triangles</code> Uint16Array with triangle indices.</li>
 </ul>
-<p>Let&#x27;s go ahead use these arrays to build the vertex buffer and index buffer. Replace <strong>create
+<p>Let's go ahead use these arrays to build the vertex buffer and index buffer. Replace <strong>create
 sphere</strong> with the following snippet.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>renderable<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.EntityManager.get().create();<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>renderable<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.EntityManager.get().create();
-scene.addEntity(renderable);<span style="color: #bbbbbb"></span>
+scene.addEntity(renderable);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>icosphere<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>Filament.IcoSphere(<span style="color: #666666">5</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>icosphere<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>Filament.IcoSphere(<span style="color: #666">5</span>);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>vb<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.VertexBuffer.Builder()<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>vb<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.VertexBuffer.Builder()
-<span style="color: #bbbbbb">  </span>.vertexCount(icosphere.vertices.length<span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">3</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.vertexCount(icosphere.vertices.length<span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">3</span>)
-<span style="color: #bbbbbb">  </span>.bufferCount(<span style="color: #666666">2</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.bufferCount(<span style="color: #666">2</span>)
-<span style="color: #bbbbbb">  </span>.attribute(VertexAttribute.POSITION,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>AttributeType.FLOAT3,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.attribute(VertexAttribute.POSITION,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>AttributeType.FLOAT3,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>)
-<span style="color: #bbbbbb">  </span>.attribute(VertexAttribute.TANGENTS,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span>AttributeType.SHORT4,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.attribute(VertexAttribute.TANGENTS,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span>AttributeType.SHORT4,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>)
-<span style="color: #bbbbbb">  </span>.normalized(VertexAttribute.TANGENTS)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.normalized(VertexAttribute.TANGENTS)
-<span style="color: #bbbbbb">  </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ib<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.IndexBuffer.Builder()<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ib<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.IndexBuffer.Builder()
-<span style="color: #bbbbbb">  </span>.indexCount(icosphere.triangles.length)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.indexCount(icosphere.triangles.length)
-<span style="color: #bbbbbb">  </span>.bufferType(IndexType.USHORT)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.bufferType(IndexType.USHORT)
-<span style="color: #bbbbbb">  </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine);
-vb.setBufferAt(engine,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>icosphere.vertices);<span style="color: #bbbbbb"></span>
+vb.setBufferAt(engine,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>icosphere.vertices);
-vb.setBufferAt(engine,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span>icosphere.tangents);<span style="color: #bbbbbb"></span>
+vb.setBufferAt(engine,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span>icosphere.tangents);
-ib.setBuffer(engine,<span style="color: #bbbbbb"> </span>icosphere.triangles);<span style="color: #bbbbbb"></span>
+ib.setBuffer(engine,<span style="color: #BBB"> </span>icosphere.triangles);
-Filament.RenderableManager.Builder(<span style="color: #666666">1</span>)<span style="color: #bbbbbb"></span>
+Filament.RenderableManager.Builder(<span style="color: #666">1</span>)
-<span style="color: #bbbbbb">  </span>.boundingBox({<span style="color: #bbbbbb"> </span>center<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">-1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">-1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">-1</span>],<span style="color: #bbbbbb"> </span>halfExtent<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>]<span style="color: #bbbbbb"> </span>})<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.boundingBox({<span style="color: #BBB"> </span>center<span style="color: #666">:</span><span style="color: #BBB"> </span>[<span style="color: #666">-1</span>,<span style="color: #BBB"> </span><span style="color: #666">-1</span>,<span style="color: #BBB"> </span><span style="color: #666">-1</span>],<span style="color: #BBB"> </span>halfExtent<span style="color: #666">:</span><span style="color: #BBB"> </span>[<span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>]<span style="color: #BBB"> </span>})
-<span style="color: #bbbbbb">  </span>.material(<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>matinstance)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.material(<span style="color: #666">0</span>,<span style="color: #BBB"> </span>matinstance)
-<span style="color: #bbbbbb">  </span>.geometry(<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>PrimitiveType.TRIANGLES,<span style="color: #bbbbbb"> </span>vb,<span style="color: #bbbbbb"> </span>ib)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.geometry(<span style="color: #666">0</span>,<span style="color: #BBB"> </span>PrimitiveType.TRIANGLES,<span style="color: #BBB"> </span>vb,<span style="color: #BBB"> </span>ib)
-<span style="color: #bbbbbb">  </span>.build(engine,<span style="color: #bbbbbb"> </span>renderable);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine,<span style="color: #BBB"> </span>renderable);
 </pre></div>
-<p>At this point, the app is rendering a sphere, but it is black so it doesn&#x27;t show up. To prove that
+<p>At this point, the app is rendering a sphere, but it is black so it doesn't show up. To prove that
 the sphere is there, you can try changing the background color to blue via <code>setClearColor</code>, like we
 did in the first tutorial.</p>
 <h2>Add lighting</h2>
 <p>In this section we will create some directional light sources, as well as an image-based light (IBL)
 defined by one of the KTX files we built at the start of the demo. First, replace the <strong>create
 lights</strong> comment with the following snippet.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>sunlight<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.EntityManager.get().create();<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>sunlight<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.EntityManager.get().create();
-scene.addEntity(sunlight);<span style="color: #bbbbbb"></span>
+scene.addEntity(sunlight);
-Filament.LightManager.Builder(LightType.SUN)<span style="color: #bbbbbb"></span>
+Filament.LightManager.Builder(LightType.SUN)
-<span style="color: #bbbbbb">  </span>.color([<span style="color: #666666">0.98</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.92</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.89</span>])<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.color([<span style="color: #666">0.98</span>,<span style="color: #BBB"> </span><span style="color: #666">0.92</span>,<span style="color: #BBB"> </span><span style="color: #666">0.89</span>])
-<span style="color: #bbbbbb">  </span>.intensity(<span style="color: #666666">110000.0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.intensity(<span style="color: #666">110000.0</span>)
-<span style="color: #bbbbbb">  </span>.direction([<span style="color: #666666">0.6</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">-1.0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">-0.8</span>])<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.direction([<span style="color: #666">0.6</span>,<span style="color: #BBB"> </span><span style="color: #666">-1.0</span>,<span style="color: #BBB"> </span><span style="color: #666">-0.8</span>])
-<span style="color: #bbbbbb">  </span>.sunAngularRadius(<span style="color: #666666">1.9</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.sunAngularRadius(<span style="color: #666">1.9</span>)
-<span style="color: #bbbbbb">  </span>.sunHaloSize(<span style="color: #666666">10.0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.sunHaloSize(<span style="color: #666">10.0</span>)
-<span style="color: #bbbbbb">  </span>.sunHaloFalloff(<span style="color: #666666">80.0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.sunHaloFalloff(<span style="color: #666">80.0</span>)
-<span style="color: #bbbbbb">  </span>.build(engine,<span style="color: #bbbbbb"> </span>sunlight);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine,<span style="color: #BBB"> </span>sunlight);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>backlight<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.EntityManager.get().create();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>backlight<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.EntityManager.get().create();
-scene.addEntity(backlight);<span style="color: #bbbbbb"></span>
+scene.addEntity(backlight);
-Filament.LightManager.Builder(LightType.DIRECTIONAL)<span style="color: #bbbbbb"></span>
+Filament.LightManager.Builder(LightType.DIRECTIONAL)
-<span style="color: #bbbbbb">        </span>.direction([<span style="color: #666666">-1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>])<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span>.direction([<span style="color: #666">-1</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>])
-<span style="color: #bbbbbb">        </span>.intensity(<span style="color: #666666">50000.0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span>.intensity(<span style="color: #666">50000.0</span>)
-<span style="color: #bbbbbb">        </span>.build(engine,<span style="color: #bbbbbb"> </span>backlight);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span>.build(engine,<span style="color: #BBB"> </span>backlight);
 </pre></div>
 <p>The <code>SUN</code> light source is similar to the <code>DIRECTIONAL</code> light source, but has some extra
 parameters because Filament will automatically draw a disk into the skybox.</p>
 <p>Next we need to create an <code>IndirectLight</code> object from the KTX IBL. One way of doing this is the
-following (don&#x27;t type this out, there&#x27;s an easier way).</p>
+following (don't type this out, there's an easier way).</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>format<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.PixelDataFormat.RGB;<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>format<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.PixelDataFormat.RGB;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>datatype<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.PixelDataType.UINT_10F_11F_11F_REV;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>datatype<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.PixelDataType.UINT_10F_11F_11F_REV;
-<span style="color: #3D7B7B; font-style: italic">// Create a Texture object for the mipmapped cubemap.</span><span style="color: #bbbbbb"></span>
+<span style="color: #3D7B7B; font-style: italic">// Create a Texture object for the mipmapped cubemap.</span>
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ibl_package<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Buffer(Filament.assets[ibl_url]);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ibl_package<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Buffer(Filament.assets[ibl_url]);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>iblktx<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>Filament.Ktx1Bundle(ibl_package);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>iblktx<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>Filament.Ktx1Bundle(ibl_package);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ibltex<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Texture.Builder()<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ibltex<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Texture.Builder()
-<span style="color: #bbbbbb">  </span>.width(iblktx.info().pixelWidth)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.width(iblktx.info().pixelWidth)
-<span style="color: #bbbbbb">  </span>.height(iblktx.info().pixelHeight)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.height(iblktx.info().pixelHeight)
-<span style="color: #bbbbbb">  </span>.levels(iblktx.getNumMipLevels())<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.levels(iblktx.getNumMipLevels())
-<span style="color: #bbbbbb">  </span>.sampler(Filament.Texture$Sampler.SAMPLER_CUBEMAP)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.sampler(Filament.Texture$Sampler.SAMPLER_CUBEMAP)
-<span style="color: #bbbbbb">  </span>.format(Filament.Texture$InternalFormat.RGBA8)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.format(Filament.Texture$InternalFormat.RGBA8)
-<span style="color: #bbbbbb">  </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine);
-<span style="color: #008000; font-weight: bold">for</span><span style="color: #bbbbbb"> </span>(<span style="color: #008000; font-weight: bold">let</span><span style="color: #bbbbbb"> </span>level<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>;<span style="color: #bbbbbb"> </span>level<span style="color: #bbbbbb"> </span><span style="color: #666666">&lt;</span><span style="color: #bbbbbb"> </span>iblktx.getNumMipLevels();<span style="color: #bbbbbb"> </span><span style="color: #666666">++</span>level)<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">for</span><span style="color: #BBB"> </span>(<span style="color: #008000; font-weight: bold">let</span><span style="color: #BBB"> </span>level<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #666">0</span>;<span style="color: #BBB"> </span>level<span style="color: #BBB"> </span><span style="color: #666">&lt;</span><span style="color: #BBB"> </span>iblktx.getNumMipLevels();<span style="color: #BBB"> </span><span style="color: #666">++</span>level)<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">  </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>uint8array<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>iblktx.getCubeBlob(level).getBytes();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>uint8array<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>iblktx.getCubeBlob(level).getBytes();
-<span style="color: #bbbbbb">  </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>pixelbuffer<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.PixelBuffer(uint8array,<span style="color: #bbbbbb"> </span>format,<span style="color: #bbbbbb"> </span>datatype);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>pixelbuffer<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.PixelBuffer(uint8array,<span style="color: #BBB"> </span>format,<span style="color: #BBB"> </span>datatype);
-<span style="color: #bbbbbb">  </span>ibltex.setImageCube(engine,<span style="color: #bbbbbb"> </span>level,<span style="color: #bbbbbb"> </span>pixelbuffer);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>ibltex.setImageCube(engine,<span style="color: #BBB"> </span>level,<span style="color: #BBB"> </span>pixelbuffer);
-}<span style="color: #bbbbbb"></span>
+}
-<span style="color: #3D7B7B; font-style: italic">// Parse the spherical harmonics metadata.</span><span style="color: #bbbbbb"></span>
+<span style="color: #3D7B7B; font-style: italic">// Parse the spherical harmonics metadata.</span>
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>shstring<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>iblktx.getMetadata(<span style="color: #BA2121">&#39;sh&#39;</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>shstring<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>iblktx.getMetadata(<span style="color: #BA2121">&#39;sh&#39;</span>);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>shfloats<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>shstring.split(<span style="color: #A45A77">/\s/</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">9</span><span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span><span style="color: #666666">3</span>).map(<span style="color: #008000">parseFloat</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>shfloats<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>shstring.split(<span style="color: #A45A77">/\s/</span>,<span style="color: #BBB"> </span><span style="color: #666">9</span><span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span><span style="color: #666">3</span>).map(<span style="color: #008000">parseFloat</span>);
-<span style="color: #3D7B7B; font-style: italic">// Build the IBL object and insert it into the scene.</span><span style="color: #bbbbbb"></span>
+<span style="color: #3D7B7B; font-style: italic">// Build the IBL object and insert it into the scene.</span>
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>indirectLight<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.IndirectLight.Builder()<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>indirectLight<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.IndirectLight.Builder()
-<span style="color: #bbbbbb">  </span>.reflections(ibltex)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.reflections(ibltex)
-<span style="color: #bbbbbb">  </span>.irradianceSh(<span style="color: #666666">3</span>,<span style="color: #bbbbbb"> </span>shfloats)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.irradianceSh(<span style="color: #666">3</span>,<span style="color: #BBB"> </span>shfloats)
-<span style="color: #bbbbbb">  </span>.intensity(<span style="color: #666666">50000.0</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.intensity(<span style="color: #666">50000.0</span>)
-<span style="color: #bbbbbb">  </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine);
-scene.setIndirectLight(indirectLight);<span style="color: #bbbbbb"></span>
+scene.setIndirectLight(indirectLight);
 </pre></div>
 <p>Filament provides a JavaScript utility to make this simpler,
 simply replace the <strong>create IBL</strong> comment with the following snippet.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>indirectLight<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createIblFromKtx1(ibl_url);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>indirectLight<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createIblFromKtx1(ibl_url);
-indirectLight.setIntensity(<span style="color: #666666">50000</span>);<span style="color: #bbbbbb"></span>
+indirectLight.setIntensity(<span style="color: #666">50000</span>);
-scene.setIndirectLight(indirectLight);<span style="color: #bbbbbb"></span>
+scene.setIndirectLight(indirectLight);
 </pre></div>
 <h2>Add background</h2>
 <p>At this point you can run the demo and you should see a red plastic ball against a black background.
 Without a skybox, the reflections on the ball are not representative of its surroundings.
-Here&#x27;s one way to create a texture for the skybox:</p>
+Here's one way to create a texture for the skybox:</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>sky_package<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Buffer(Filament.assets[sky_url]);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>sky_package<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Buffer(Filament.assets[sky_url]);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>skyktx<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>Filament.Ktx1Bundle(sky_package);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>skyktx<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>Filament.Ktx1Bundle(sky_package);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>skytex<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Texture.Builder()<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>skytex<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Texture.Builder()
-<span style="color: #bbbbbb">  </span>.width(skyktx.info().pixelWidth)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.width(skyktx.info().pixelWidth)
-<span style="color: #bbbbbb">  </span>.height(skyktx.info().pixelHeight)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.height(skyktx.info().pixelHeight)
-<span style="color: #bbbbbb">  </span>.levels(<span style="color: #666666">1</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.levels(<span style="color: #666">1</span>)
-<span style="color: #bbbbbb">  </span>.sampler(Filament.Texture$Sampler.SAMPLER_CUBEMAP)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.sampler(Filament.Texture$Sampler.SAMPLER_CUBEMAP)
-<span style="color: #bbbbbb">  </span>.format(Filament.Texture$InternalFormat.RGBA8)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.format(Filament.Texture$InternalFormat.RGBA8)
-<span style="color: #bbbbbb">  </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>.build(engine);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>uint8array<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>skyktx.getCubeBlob(<span style="color: #666666">0</span>).getBytes();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>uint8array<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>skyktx.getCubeBlob(<span style="color: #666">0</span>).getBytes();
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>pixelbuffer<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.PixelBuffer(uint8array,<span style="color: #bbbbbb"> </span>format,<span style="color: #bbbbbb"> </span>datatype);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>pixelbuffer<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.PixelBuffer(uint8array,<span style="color: #BBB"> </span>format,<span style="color: #BBB"> </span>datatype);
-skytex.setImageCube(engine,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>pixelbuffer);<span style="color: #bbbbbb"></span>
+skytex.setImageCube(engine,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>pixelbuffer);
 </pre></div>
 <p>Filament provides a Javascript utility to make this easier.
 Replace <strong>create skybox</strong> with the following.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>skybox<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createSkyFromKtx1(sky_url);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>skybox<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createSkyFromKtx1(sky_url);
-scene.setSkybox(skybox);<span style="color: #bbbbbb"></span>
+scene.setSkybox(skybox);
 </pre></div>
-<p>That&#x27;s it, we now have a shiny red ball floating in an environment! The complete JavaScript file is
+<p>That's it, we now have a shiny red ball floating in an environment! The complete JavaScript file is
 available <a href="tutorial_redball.js">here</a>.</p>
-<p>In the <a href="tutorial_suzanne.html">next tutorial</a>, we&#x27;ll take a closer look at textures and interaction.</p>
+<p>In the <a href="tutorial_suzanne.html">next tutorial</a>, we'll take a closer look at textures and interaction.</p>
 </body>
 </html>
@@ -8,58 +8,58 @@
 <div class="demo_frame"><iframe src="demo_suzanne.html"></iframe><a href="demo_suzanne.html">&#x1F517;</a></div>
 <p>This tutorial will describe how to create the <strong>suzanne</strong> demo, introducing you to compressed
 textures, mipmap generation, asynchronous texture loading, and trackball rotation.</p>
-<p>Much like the <a href="tutorial_redball.html">previous tutorial</a>, you&#x27;ll need to use the command-line tools that can be found in
+<p>Much like the <a href="tutorial_redball.html">previous tutorial</a>, you'll need to use the command-line tools that can be found in
 the appropriate <a href="//github.com/google/filament/releases">Filament release</a> for your development machine. In addition to <code>matc</code> and <code>cmgen</code>,
-we&#x27;ll also be using <code>filamesh</code> and <code>mipgen</code>.</p>
+we'll also be using <code>filamesh</code> and <code>mipgen</code>.</p>
 <h2>Create filamesh file</h2>
 <p>Filament does not have an asset loading system, but it does provide a binary mesh format
-called <code>filamesh</code> for simple use cases. Let&#x27;s create a compressed filamesh file for suzanne by
+called <code>filamesh</code> for simple use cases. Let's create a compressed filamesh file for suzanne by
 converting <a href="https://github.com/google/filament/blob/main/assets/models/monkey/monkey.obj">this OBJ file</a>:</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>filamesh --compress monkey.obj suzanne.filamesh
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>filamesh<span style="color: #BBB"> </span>--compress<span style="color: #BBB"> </span>monkey.obj<span style="color: #BBB"> </span>suzanne.filamesh
 </pre></div>
 <h2>Create mipmapped textures</h2>
-<p>Next, let&#x27;s create mipmapped KTX files using filament&#x27;s <code>mipgen</code> tool. We&#x27;ll create compressed and
+<p>Next, let's create mipmapped KTX files using filament's <code>mipgen</code> tool. We'll create compressed and
 non-compressed variants for each texture, since not all platforms support the same compression
 formats. First copy over the PNG files from the <a href="https://github.com/google/filament/blob/main/assets/models/monkey">monkey folder</a>, then do:</p>
 <div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #3D7B7B; font-style: italic"># Create mipmaps for base color</span>
-mipgen albedo.png albedo.ktx2
+mipgen<span style="color: #BBB"> </span>albedo.png<span style="color: #BBB"> </span>albedo.ktx2
-mipgen --compression<span style="color: #666666">=</span>uastc albedo.png albedo.ktx2
+mipgen<span style="color: #BBB"> </span>--compression<span style="color: #666">=</span>uastc<span style="color: #BBB"> </span>albedo.png<span style="color: #BBB"> </span>albedo.ktx2
 <span style="color: #3D7B7B; font-style: italic"># Create mipmaps for the normal map and a compressed variant.</span>
-mipgen --strip-alpha --kernel<span style="color: #666666">=</span>NORMALS --linear normal.png normal.ktx
+mipgen<span style="color: #BBB"> </span>--strip-alpha<span style="color: #BBB"> </span>--kernel<span style="color: #666">=</span>NORMALS<span style="color: #BBB"> </span>--linear<span style="color: #BBB"> </span>normal.png<span style="color: #BBB"> </span>normal.ktx
-mipgen --strip-alpha --kernel<span style="color: #666666">=</span>NORMALS --linear --compression<span style="color: #666666">=</span>uastc_normals <span style="color: #AA5D1F; font-weight: bold">\</span>
+mipgen<span style="color: #BBB"> </span>--strip-alpha<span style="color: #BBB"> </span>--kernel<span style="color: #666">=</span>NORMALS<span style="color: #BBB"> </span>--linear<span style="color: #BBB"> </span>--compression<span style="color: #666">=</span>uastc_normals<span style="color: #BBB"> </span><span style="color: #AA5D1F; font-weight: bold">\</span>
-    normal.png normal.ktx2
+<span style="color: #BBB">    </span>normal.png<span style="color: #BBB"> </span>normal.ktx2
 <span style="color: #3D7B7B; font-style: italic"># Create mipmaps for the single-component roughness map and a compressed variant.</span>
-mipgen --grayscale roughness.png roughness.ktx
+mipgen<span style="color: #BBB"> </span>--grayscale<span style="color: #BBB"> </span>roughness.png<span style="color: #BBB"> </span>roughness.ktx
-mipgen --grayscale --compression<span style="color: #666666">=</span>uastc roughness.png roughness.ktx2
+mipgen<span style="color: #BBB"> </span>--grayscale<span style="color: #BBB"> </span>--compression<span style="color: #666">=</span>uastc<span style="color: #BBB"> </span>roughness.png<span style="color: #BBB"> </span>roughness.ktx2
 <span style="color: #3D7B7B; font-style: italic"># Create mipmaps for the single-component metallic map and a compressed variant.</span>
-mipgen --grayscale metallic.png metallic.ktx
+mipgen<span style="color: #BBB"> </span>--grayscale<span style="color: #BBB"> </span>metallic.png<span style="color: #BBB"> </span>metallic.ktx
-mipgen --grayscale --compression<span style="color: #666666">=</span>uastc metallic.png metallic.ktx2
+mipgen<span style="color: #BBB"> </span>--grayscale<span style="color: #BBB"> </span>--compression<span style="color: #666">=</span>uastc<span style="color: #BBB"> </span>metallic.png<span style="color: #BBB"> </span>metallic.ktx2
 <span style="color: #3D7B7B; font-style: italic"># Create mipmaps for the single-component occlusion map and a compressed variant.</span>
-mipgen --grayscale ao.png ao.ktx
+mipgen<span style="color: #BBB"> </span>--grayscale<span style="color: #BBB"> </span>ao.png<span style="color: #BBB"> </span>ao.ktx
-mipgen --grayscale --compression<span style="color: #666666">=</span>uastc ao.png ao.ktx2
+mipgen<span style="color: #BBB"> </span>--grayscale<span style="color: #BBB"> </span>--compression<span style="color: #666">=</span>uastc<span style="color: #BBB"> </span>ao.png<span style="color: #BBB"> </span>ao.ktx2
 </pre></div>
-<p>For more information on mipgen&#x27;s arguments and supported formats, do <code>mipgen --help</code>.</p>
+<p>For more information on mipgen's arguments and supported formats, do <code>mipgen --help</code>.</p>
-<p>In a production setting, you&#x27;d want to invoke these commands with a script or build system.</p>
+<p>In a production setting, you'd want to invoke these commands with a script or build system.</p>
 <h2>Bake environment map</h2>
-<p>Much like the <a href="tutorial_redball.html">previous tutorial</a> we need to use Filament&#x27;s <code>cmgen</code> tool to produce cubemap files.</p>
+<p>Much like the <a href="tutorial_redball.html">previous tutorial</a> we need to use Filament's <code>cmgen</code> tool to produce cubemap files.</p>
 <p>Download <a href="//github.com/google/filament/blob/main/third_party/environments/venetian_crossroads_2k.hdr">venetian_crossroads_2k.hdr</a>, then invoke the following commands in your terminal.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>cmgen -x . --format<span style="color: #666666">=</span>ktx --size<span style="color: #666666">=64</span> --extract-blur<span style="color: #666666">=0</span>.1 venetian_crossroads_2k.hdr
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>cmgen<span style="color: #BBB"> </span>-x<span style="color: #BBB"> </span>.<span style="color: #BBB"> </span>--format<span style="color: #666">=</span>ktx<span style="color: #BBB"> </span>--size<span style="color: #666">=64</span><span style="color: #BBB"> </span>--extract-blur<span style="color: #666">=0</span>.1<span style="color: #BBB"> </span>venetian_crossroads_2k.hdr
-<span style="color: #008000">cd</span> venetian* ; mv venetian*_ibl.ktx venetian_crossroads_2k_skybox_tiny.ktx ; <span style="color: #008000">cd</span> -
+<span style="color: #008000">cd</span><span style="color: #BBB"> </span>venetian*<span style="color: #BBB"> </span>;<span style="color: #BBB"> </span>mv<span style="color: #BBB"> </span>venetian*_ibl.ktx<span style="color: #BBB"> </span>venetian_crossroads_2k_skybox_tiny.ktx<span style="color: #BBB"> </span>;<span style="color: #BBB"> </span><span style="color: #008000">cd</span><span style="color: #BBB"> </span>-
-cmgen -x . --format<span style="color: #666666">=</span>ktx --size<span style="color: #666666">=256</span> --extract-blur<span style="color: #666666">=0</span>.1 venetian_crossroads_2k.hdr
+cmgen<span style="color: #BBB"> </span>-x<span style="color: #BBB"> </span>.<span style="color: #BBB"> </span>--format<span style="color: #666">=</span>ktx<span style="color: #BBB"> </span>--size<span style="color: #666">=256</span><span style="color: #BBB"> </span>--extract-blur<span style="color: #666">=0</span>.1<span style="color: #BBB"> </span>venetian_crossroads_2k.hdr
-cmgen -x . --format<span style="color: #666666">=</span>ktx --size<span style="color: #666666">=256</span> --extract-blur<span style="color: #666666">=0</span>.1 venetian_crossroads_2k.hdr
+cmgen<span style="color: #BBB"> </span>-x<span style="color: #BBB"> </span>.<span style="color: #BBB"> </span>--format<span style="color: #666">=</span>ktx<span style="color: #BBB"> </span>--size<span style="color: #666">=256</span><span style="color: #BBB"> </span>--extract-blur<span style="color: #666">=0</span>.1<span style="color: #BBB"> </span>venetian_crossroads_2k.hdr
-cmgen -x . --format<span style="color: #666666">=</span>ktx --size<span style="color: #666666">=256</span> --extract-blur<span style="color: #666666">=0</span>.1 venetian_crossroads_2k.hdr
+cmgen<span style="color: #BBB"> </span>-x<span style="color: #BBB"> </span>.<span style="color: #BBB"> </span>--format<span style="color: #666">=</span>ktx<span style="color: #BBB"> </span>--size<span style="color: #666">=256</span><span style="color: #BBB"> </span>--extract-blur<span style="color: #666">=0</span>.1<span style="color: #BBB"> </span>venetian_crossroads_2k.hdr
 </pre></div>
 <h2>Define textured material</h2>
 <p>You might recall the <code>filamat</code> file we generated in the previous tutorial for red plastic. For this
-demo, we&#x27;ll create a material that uses textures for several parameters.</p>
+demo, we'll create a material that uses textures for several parameters.</p>
 <p>Create the following text file and call it <code>textured.mat</code>. Note that our material definition now
 requires a <code>uv0</code> attribute.</p>
 <div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>material {
@@ -90,7 +90,7 @@ fragment {
 </pre></div>
 <p>Next, invoke <code>matc</code> as follows.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>matc -a opengl -p mobile -o textured.filamat textured.mat
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>matc<span style="color: #BBB"> </span>-a<span style="color: #BBB"> </span>opengl<span style="color: #BBB"> </span>-p<span style="color: #BBB"> </span>mobile<span style="color: #BBB"> </span>-o<span style="color: #BBB"> </span>textured.filamat<span style="color: #BBB"> </span>textured.mat
 </pre></div>
 <p>You should now have a material archive in your working directory. For the suzanne asset, the normal
@@ -100,65 +100,65 @@ materials, consult the official document describing the <a href="https://google.
 <p>Create a text file called <code>suzanne.html</code> and copy over the HTML that we used in the <a href="tutorial_redball.html">previous
 tutorial</a>. Change the last script tag from <code>redball.js</code> to <code>suzanne.js</code>. Next, create <code>suzanne.js</code>
 with the following content.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #3D7B7B; font-style: italic">// TODO: declare asset URLs</span><span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #3D7B7B; font-style: italic">// TODO: declare asset URLs</span>
-Filament.init([<span style="color: #bbbbbb"> </span>filamat_url,<span style="color: #bbbbbb"> </span>filamesh_url,<span style="color: #bbbbbb"> </span>sky_small_url,<span style="color: #bbbbbb"> </span>ibl_url<span style="color: #bbbbbb"> </span>],<span style="color: #bbbbbb"> </span>()<span style="color: #bbbbbb"> </span>=&gt;<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+Filament.init([<span style="color: #BBB"> </span>filamat_url,<span style="color: #BBB"> </span>filamesh_url,<span style="color: #BBB"> </span>sky_small_url,<span style="color: #BBB"> </span>ibl_url<span style="color: #BBB"> </span>],<span style="color: #BBB"> </span>()<span style="color: #BBB"> </span>=&gt;<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.app<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>App(<span style="color: #008000">document</span>.getElementsByTagName(<span style="color: #BA2121">&#39;canvas&#39;</span>)[<span style="color: #666666">0</span>]);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.app<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>App(<span style="color: #008000">document</span>.getElementsByTagName(<span style="color: #BA2121">&#39;canvas&#39;</span>)[<span style="color: #666">0</span>]);
-});<span style="color: #bbbbbb"></span>
+});
-<span style="color: #008000; font-weight: bold">class</span><span style="color: #bbbbbb"> </span>App<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">class</span><span style="color: #BBB"> </span>App<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">constructor</span>(canvas)<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">constructor</span>(canvas)<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.canvas<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>canvas;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.canvas<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>canvas;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.engine<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Engine.create(canvas);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.engine<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Engine.create(canvas);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.scene<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createScene();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.scene<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createScene();
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>material<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createMaterial(filamat_url);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>material<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createMaterial(filamat_url);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.matinstance<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>material.createInstance();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.matinstance<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>material.createInstance();
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>filamesh<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.loadFilamesh(filamesh_url,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.matinstance);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>filamesh<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.loadFilamesh(filamesh_url,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.matinstance);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.suzanne<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>filamesh.renderable;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.suzanne<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>filamesh.renderable;
-<span style="color: #bbbbbb">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: create sky box and IBL</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: create sky box and IBL</span>
-<span style="color: #bbbbbb">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: initialize gltumble</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: initialize gltumble</span>
-<span style="color: #bbbbbb">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: fetch larger assets</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: fetch larger assets</span>
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.swapChain<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createSwapChain();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.swapChain<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createSwapChain();
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.renderer<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createRenderer();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.renderer<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createRenderer();
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.camera<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createCamera(Filament.EntityManager.get().create());<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.camera<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createCamera(Filament.EntityManager.get().create());
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.view<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createView();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.view<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createView();
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.view.setCamera(<span style="color: #008000; font-weight: bold">this</span>.camera);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.view.setCamera(<span style="color: #008000; font-weight: bold">this</span>.camera);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.view.setScene(<span style="color: #008000; font-weight: bold">this</span>.scene);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.view.setScene(<span style="color: #008000; font-weight: bold">this</span>.scene);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.render<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.render.bind(<span style="color: #008000; font-weight: bold">this</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.render<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.render.bind(<span style="color: #008000; font-weight: bold">this</span>);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.resize<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.resize.bind(<span style="color: #008000; font-weight: bold">this</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.resize<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.resize.bind(<span style="color: #008000; font-weight: bold">this</span>);
-<span style="color: #bbbbbb">        </span><span style="color: #008000">window</span>.addEventListener(<span style="color: #BA2121">&#39;resize&#39;</span>,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.resize);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000">window</span>.addEventListener(<span style="color: #BA2121">&#39;resize&#39;</span>,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.resize);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>eye<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">4</span>],<span style="color: #bbbbbb"> </span>center<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>],<span style="color: #bbbbbb"> </span>up<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>];<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>eye<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">4</span>],<span style="color: #BBB"> </span>center<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>],<span style="color: #BBB"> </span>up<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>];
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.camera.lookAt(eye,<span style="color: #bbbbbb"> </span>center,<span style="color: #bbbbbb"> </span>up);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.camera.lookAt(eye,<span style="color: #BBB"> </span>center,<span style="color: #BBB"> </span>up);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.resize();<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.resize();
-<span style="color: #bbbbbb">        </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-<span style="color: #bbbbbb">    </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>}
-<span style="color: #bbbbbb">    </span>render()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>render()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: apply gltumble matrix</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #3D7B7B; font-style: italic">// TODO: apply gltumble matrix</span>
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.renderer.render(<span style="color: #008000; font-weight: bold">this</span>.swapChain,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.view);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.renderer.render(<span style="color: #008000; font-weight: bold">this</span>.swapChain,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.view);
-<span style="color: #bbbbbb">        </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-<span style="color: #bbbbbb">    </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>}
-<span style="color: #bbbbbb">    </span>resize()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>resize()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>dpr<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.devicePixelRatio;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>dpr<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.devicePixelRatio;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>width<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.width<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.innerWidth<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span>dpr;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>width<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.width<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.innerWidth<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span>dpr;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>height<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.height<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.innerHeight<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span>dpr;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>height<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.height<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.innerHeight<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span>dpr;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.view.setViewport([<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>width,<span style="color: #bbbbbb"> </span>height]);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.view.setViewport([<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>width,<span style="color: #BBB"> </span>height]);
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>aspect<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>width<span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span>height;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>aspect<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>width<span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span>height;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>Fov<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Camera$Fov,<span style="color: #bbbbbb"> </span>fov<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>aspect<span style="color: #bbbbbb"> </span><span style="color: #666666">&lt;</span><span style="color: #bbbbbb"> </span><span style="color: #666666">1</span><span style="color: #bbbbbb"> </span><span style="color: #666666">?</span><span style="color: #bbbbbb"> </span>Fov.HORIZONTAL<span style="color: #bbbbbb"> </span><span style="color: #666666">:</span><span style="color: #bbbbbb"> </span>Fov.VERTICAL;<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>Fov<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Camera$Fov,<span style="color: #BBB"> </span>fov<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>aspect<span style="color: #BBB"> </span><span style="color: #666">&lt;</span><span style="color: #BBB"> </span><span style="color: #666">1</span><span style="color: #BBB"> </span><span style="color: #666">?</span><span style="color: #BBB"> </span>Fov.HORIZONTAL<span style="color: #BBB"> </span><span style="color: #666">:</span><span style="color: #BBB"> </span>Fov.VERTICAL;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">this</span>.camera.setProjectionFov(<span style="color: #666666">45</span>,<span style="color: #bbbbbb"> </span>aspect,<span style="color: #bbbbbb"> </span><span style="color: #666666">1.0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">10.0</span>,<span style="color: #bbbbbb"> </span>fov);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">this</span>.camera.setProjectionFov(<span style="color: #666">45</span>,<span style="color: #BBB"> </span>aspect,<span style="color: #BBB"> </span><span style="color: #666">1.0</span>,<span style="color: #BBB"> </span><span style="color: #666">10.0</span>,<span style="color: #BBB"> </span>fov);
-<span style="color: #bbbbbb">    </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>}
-}<span style="color: #bbbbbb"></span>
+}
 </pre></div>
-<p>Our app will only require a subset of assets to be present for <code>App</code> construction. We&#x27;ll download
+<p>Our app will only require a subset of assets to be present for <code>App</code> construction. We'll download
 the other assets after construction. By using a progressive loading strategy, we can reduce the
 perceived load time.</p>
 <p>Next we need to supply the URLs for various assets. This is actually a bit tricky, because different
@@ -171,85 +171,85 @@ string -- which might be empty.</p>
 <p>In our case, we know that our web server will have <code>astc</code> and <code>s3tc</code> variants for albedo, and <code>etc</code>
 variants for the other textures. The uncompressed variants (empty string) are always available as a
 last resort. Go ahead and replace the <strong>declare asset URLs</strong> comment with the following snippet.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>albedo_suffix<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.getSupportedFormatSuffix(<span style="color: #BA2121">&#39;astc s3tc_srgb&#39;</span>);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>albedo_suffix<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.getSupportedFormatSuffix(<span style="color: #BA2121">&#39;astc s3tc_srgb&#39;</span>);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>texture_suffix<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.getSupportedFormatSuffix(<span style="color: #BA2121">&#39;etc&#39;</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>texture_suffix<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.getSupportedFormatSuffix(<span style="color: #BA2121">&#39;etc&#39;</span>);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>environ<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">&#39;venetian_crossroads_2k&#39;</span><span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>environ<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">&#39;venetian_crossroads_2k&#39;</span>
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ibl_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_ibl.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ibl_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_ibl.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>sky_small_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_skybox_tiny.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>sky_small_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_skybox_tiny.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>sky_large_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_skybox.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>sky_large_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">/</span><span style="color: #A45A77; font-weight: bold">${</span>environ<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">_skybox.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>albedo_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`albedo</span><span style="color: #A45A77; font-weight: bold">${</span>albedo_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>albedo_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`albedo</span><span style="color: #A45A77; font-weight: bold">${</span>albedo_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ao_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`ao</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ao_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`ao</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>metallic_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`metallic</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>metallic_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`metallic</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>normal_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`normal</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>normal_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`normal</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>roughness_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">`roughness</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>roughness_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">`roughness</span><span style="color: #A45A77; font-weight: bold">${</span>texture_suffix<span style="color: #A45A77; font-weight: bold">}</span><span style="color: #BA2121">.ktx`</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>filamat_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">&#39;textured.filamat&#39;</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>filamat_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">&#39;textured.filamat&#39;</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>filamesh_url<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #BA2121">&#39;suzanne.filamesh&#39;</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>filamesh_url<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #BA2121">&#39;suzanne.filamesh&#39;</span>;
 </pre></div>
 <h2>Create skybox and IBL</h2>
-<p>Next, let&#x27;s create the low-resolution skybox and IBL in the <code>App</code> constructor.</p>
+<p>Next, let's create the low-resolution skybox and IBL in the <code>App</code> constructor.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.skybox<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createSkyFromKtx1(sky_small_url);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.skybox<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createSkyFromKtx1(sky_small_url);
-<span style="color: #008000; font-weight: bold">this</span>.scene.setSkybox(<span style="color: #008000; font-weight: bold">this</span>.skybox);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.scene.setSkybox(<span style="color: #008000; font-weight: bold">this</span>.skybox);
-<span style="color: #008000; font-weight: bold">this</span>.indirectLight<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createIblFromKtx1(ibl_url);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.indirectLight<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createIblFromKtx1(ibl_url);
-<span style="color: #008000; font-weight: bold">this</span>.indirectLight.setIntensity(<span style="color: #666666">100000</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.indirectLight.setIntensity(<span style="color: #666">100000</span>);
-<span style="color: #008000; font-weight: bold">this</span>.scene.setIndirectLight(<span style="color: #008000; font-weight: bold">this</span>.indirectLight);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.scene.setIndirectLight(<span style="color: #008000; font-weight: bold">this</span>.indirectLight);
 </pre></div>
 <p>This allows users to see a reasonable background fairly quickly, before larger assets have finished
 loading in.</p>
 <h2>Fetch assets asychronously</h2>
-<p>Next we&#x27;ll invoke the <code>Filament.fetch</code> function from within the app constructor. This function is
+<p>Next we'll invoke the <code>Filament.fetch</code> function from within the app constructor. This function is
 very similar to <code>Filament.init</code>. It takes a list of asset URLs and a callback function that triggers
 when the assets have finished downloading.</p>
-<p>In our callback, we&#x27;ll make several <code>setTextureParameter</code> calls on the material instance, then we&#x27;ll
+<p>In our callback, we'll make several <code>setTextureParameter</code> calls on the material instance, then we'll
 recreate the skybox using a higher-resolution texture. As a last step we unhide the renderable that
 was created in the app constructor.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>Filament.fetch([sky_large_url,<span style="color: #bbbbbb"> </span>albedo_url,<span style="color: #bbbbbb"> </span>roughness_url,<span style="color: #bbbbbb"> </span>metallic_url,<span style="color: #bbbbbb"> </span>normal_url,<span style="color: #bbbbbb"> </span>ao_url],<span style="color: #bbbbbb"> </span>()<span style="color: #bbbbbb"> </span>=&gt;<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>Filament.fetch([sky_large_url,<span style="color: #BBB"> </span>albedo_url,<span style="color: #BBB"> </span>roughness_url,<span style="color: #BBB"> </span>metallic_url,<span style="color: #BBB"> </span>normal_url,<span style="color: #BBB"> </span>ao_url],<span style="color: #BBB"> </span>()<span style="color: #BBB"> </span>=&gt;<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>albedo<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(albedo_url,<span style="color: #bbbbbb"> </span>{srgb<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">true</span>});<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>albedo<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(albedo_url,<span style="color: #BBB"> </span>{srgb<span style="color: #666">:</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">true</span>});
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>roughness<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(roughness_url);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>roughness<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(roughness_url);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>metallic<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(metallic_url);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>metallic<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(metallic_url);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>normal<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(normal_url);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>normal<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(normal_url);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>ao<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(ao_url);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>ao<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createTextureFromKtx2(ao_url);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>sampler<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>Filament.TextureSampler(<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>sampler<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>Filament.TextureSampler(
-<span style="color: #bbbbbb">        </span>Filament.MinFilter.LINEAR_MIPMAP_LINEAR,<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span>Filament.MinFilter.LINEAR_MIPMAP_LINEAR,
-<span style="color: #bbbbbb">        </span>Filament.MagFilter.LINEAR,<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span>Filament.MagFilter.LINEAR,
-<span style="color: #bbbbbb">        </span>Filament.WrapMode.CLAMP_TO_EDGE);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span>Filament.WrapMode.CLAMP_TO_EDGE);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;albedo&#39;</span>,<span style="color: #bbbbbb"> </span>albedo,<span style="color: #bbbbbb"> </span>sampler);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;albedo&#39;</span>,<span style="color: #BBB"> </span>albedo,<span style="color: #BBB"> </span>sampler);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;roughness&#39;</span>,<span style="color: #bbbbbb"> </span>roughness,<span style="color: #bbbbbb"> </span>sampler);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;roughness&#39;</span>,<span style="color: #BBB"> </span>roughness,<span style="color: #BBB"> </span>sampler);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;metallic&#39;</span>,<span style="color: #bbbbbb"> </span>metallic,<span style="color: #bbbbbb"> </span>sampler);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;metallic&#39;</span>,<span style="color: #BBB"> </span>metallic,<span style="color: #BBB"> </span>sampler);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;normal&#39;</span>,<span style="color: #bbbbbb"> </span>normal,<span style="color: #bbbbbb"> </span>sampler);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;normal&#39;</span>,<span style="color: #BBB"> </span>normal,<span style="color: #BBB"> </span>sampler);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;ao&#39;</span>,<span style="color: #bbbbbb"> </span>ao,<span style="color: #bbbbbb"> </span>sampler);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.matinstance.setTextureParameter(<span style="color: #BA2121">&#39;ao&#39;</span>,<span style="color: #BBB"> </span>ao,<span style="color: #BBB"> </span>sampler);
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// Replace low-res skybox with high-res skybox.</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// Replace low-res skybox with high-res skybox.</span>
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.engine.destroySkybox(<span style="color: #008000; font-weight: bold">this</span>.skybox);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.engine.destroySkybox(<span style="color: #008000; font-weight: bold">this</span>.skybox);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.skybox<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createSkyFromKtx1(sky_large_url);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.skybox<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.createSkyFromKtx1(sky_large_url);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.scene.setSkybox(<span style="color: #008000; font-weight: bold">this</span>.skybox);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.scene.setSkybox(<span style="color: #008000; font-weight: bold">this</span>.skybox);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.scene.addEntity(<span style="color: #008000; font-weight: bold">this</span>.suzanne);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.scene.addEntity(<span style="color: #008000; font-weight: bold">this</span>.suzanne);
-});<span style="color: #bbbbbb"></span>
+});
 </pre></div>
 <h2>Introduce trackball rotation</h2>
 <p>Add the following script tag to your HTML file. This imports a small third-party library that
 listens for drag events and computes a rotation matrix.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>&lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;//unpkg.com/gltumble&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>&lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;//unpkg.com/gltumble&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
 </pre></div>
 <p>Next, replace the <strong>initialize gltumble</strong> and <strong>apply gltumble matrix</strong> comments with the following
 two code snippets.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.trackball<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>Trackball(canvas,<span style="color: #bbbbbb"> </span>{startSpin<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span><span style="color: #666666">0.035</span>});<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.trackball<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>Trackball(canvas,<span style="color: #BBB"> </span>{startSpin<span style="color: #666">:</span><span style="color: #BBB"> </span><span style="color: #666">0.035</span>});
 </pre></div>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>tcm<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.getTransformManager();<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>tcm<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.getTransformManager();
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>inst<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>tcm.getInstance(<span style="color: #008000; font-weight: bold">this</span>.suzanne);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>inst<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>tcm.getInstance(<span style="color: #008000; font-weight: bold">this</span>.suzanne);
-tcm.setTransform(inst,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.trackball.getMatrix());<span style="color: #bbbbbb"></span>
+tcm.setTransform(inst,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.trackball.getMatrix());
-inst.<span style="color: #AA22FF; font-weight: bold">delete</span>();<span style="color: #bbbbbb"></span>
+inst.<span style="color: #A2F; font-weight: bold">delete</span>();
 </pre></div>
-<p>That&#x27;s it, we now have a fast-loading interactive demo. The complete JavaScript file is available
+<p>That's it, we now have a fast-loading interactive demo. The complete JavaScript file is available
 <a href="tutorial_suzanne.js">here</a>.</p>
 </body>
@@ -8,30 +8,30 @@
 <div class="demo_frame"><iframe src="demo_triangle.html"></iframe><a href="demo_triangle.html">&#x1F517;</a></div>
 <h2>Literate programming</h2>
 <p>The markdown source for this tutorial is not only used to generate this
-web page, it&#x27;s also used to generate the JavaScript for the above demo.
+web page, it's also used to generate the JavaScript for the above demo.
 We use a small Python script for weaving (generating HTML) and tangling
-(generating JS). In the code samples, you&#x27;ll often see
+(generating JS). In the code samples, you'll often see
 <code>// TODO: &lt;some task&gt;</code>. These are special markers that get replaced by
 subsequent code blocks.</p>
 <h2>Start your project</h2>
 <p>First, create a text file called <code>triangle.html</code> and fill it with the following HTML. This creates
 a mobile-friendly page with a full-screen canvas.</p>
 <div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #9C6500">&lt;!DOCTYPE html&gt;</span>
-&lt;<span style="color: #008000; font-weight: bold">html</span> <span style="color: #687822">lang</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;en&quot;</span>&gt;
+&lt;<span style="color: #008000; font-weight: bold">html</span> <span style="color: #687822">lang</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;en&quot;</span>&gt;
 &lt;<span style="color: #008000; font-weight: bold">head</span>&gt;
    &lt;<span style="color: #008000; font-weight: bold">title</span>&gt;Filament Tutorial&lt;/<span style="color: #008000; font-weight: bold">title</span>&gt;
-    &lt;<span style="color: #008000; font-weight: bold">meta</span> <span style="color: #687822">charset</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;utf-8&quot;</span>&gt;
+    &lt;<span style="color: #008000; font-weight: bold">meta</span> <span style="color: #687822">charset</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;utf-8&quot;</span>&gt;
-    &lt;<span style="color: #008000; font-weight: bold">meta</span> <span style="color: #687822">name</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;viewport&quot;</span> <span style="color: #687822">content</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;width=device-width,user-scalable=no,initial-scale=1&quot;</span>&gt;
+    &lt;<span style="color: #008000; font-weight: bold">meta</span> <span style="color: #687822">name</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;viewport&quot;</span> <span style="color: #687822">content</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;width=device-width,user-scalable=no,initial-scale=1&quot;</span>&gt;
-    &lt;<span style="color: #008000; font-weight: bold">style</span>&gt;<span style="color: #bbbbbb"></span>
+    &lt;<span style="color: #008000; font-weight: bold">style</span>&gt;
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">body</span><span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">margin</span>:<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>;<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">overflow</span>:<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">hidden</span>;<span style="color: #bbbbbb"> </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">body</span><span style="color: #BBB"> </span>{<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">margin</span>:<span style="color: #BBB"> </span><span style="color: #666">0</span>;<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">overflow</span>:<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">hidden</span>;<span style="color: #BBB"> </span>}
-<span style="color: #bbbbbb">        </span><span style="color: #008000; font-weight: bold">canvas</span><span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"> </span>touch-action:<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">none</span>;<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">width</span>:<span style="color: #bbbbbb"> </span><span style="color: #666666">100</span><span style="color: #B00040">%</span>;<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">height</span>:<span style="color: #bbbbbb"> </span><span style="color: #666666">100</span><span style="color: #B00040">%</span>;<span style="color: #bbbbbb"> </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">        </span><span style="color: #008000; font-weight: bold">canvas</span><span style="color: #BBB"> </span>{<span style="color: #BBB"> </span>touch-action:<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">none</span>;<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">width</span>:<span style="color: #BBB"> </span><span style="color: #666">100</span><span style="color: #B00040">%</span>;<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">height</span>:<span style="color: #BBB"> </span><span style="color: #666">100</span><span style="color: #B00040">%</span>;<span style="color: #BBB"> </span>}
-<span style="color: #bbbbbb">    </span>&lt;/<span style="color: #008000; font-weight: bold">style</span>&gt;
+<span style="color: #BBB">    </span>&lt;/<span style="color: #008000; font-weight: bold">style</span>&gt;
 &lt;/<span style="color: #008000; font-weight: bold">head</span>&gt;
 &lt;<span style="color: #008000; font-weight: bold">body</span>&gt;
    &lt;<span style="color: #008000; font-weight: bold">canvas</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">canvas</span>&gt;
-    &lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;filament.js&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
+    &lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;filament.js&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
-    &lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;//unpkg.com/gl-matrix@2.8.1&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
+    &lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;//unpkg.com/gl-matrix@2.8.1&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
-    &lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666666">=</span><span style="color: #BA2121">&quot;triangle.js&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
+    &lt;<span style="color: #008000; font-weight: bold">script</span> <span style="color: #687822">src</span><span style="color: #666">=</span><span style="color: #BA2121">&quot;triangle.js&quot;</span>&gt;&lt;/<span style="color: #008000; font-weight: bold">script</span>&gt;
 &lt;/<span style="color: #008000; font-weight: bold">body</span>&gt;
 &lt;/<span style="color: #008000; font-weight: bold">html</span>&gt;
 </pre></div>
@@ -48,63 +48,63 @@ a mobile-friendly page with a full-screen canvas.</p>
 <li><code>triangle.js</code> will contain your application code.</li>
 </ul>
 <p>Go ahead and create <code>triangle.js</code> with the following content.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">class</span><span style="color: #bbbbbb"> </span>App<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">class</span><span style="color: #BBB"> </span>App<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">  </span><span style="color: #008000; font-weight: bold">constructor</span>()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span><span style="color: #008000; font-weight: bold">constructor</span>()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create entities</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: create entities</span>
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.render<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.render.bind(<span style="color: #008000; font-weight: bold">this</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.render<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.render.bind(<span style="color: #008000; font-weight: bold">this</span>);
-<span style="color: #bbbbbb">    </span><span style="color: #008000; font-weight: bold">this</span>.resize<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.resize.bind(<span style="color: #008000; font-weight: bold">this</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000; font-weight: bold">this</span>.resize<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.resize.bind(<span style="color: #008000; font-weight: bold">this</span>);
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.addEventListener(<span style="color: #BA2121">&#39;resize&#39;</span>,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.resize);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.addEventListener(<span style="color: #BA2121">&#39;resize&#39;</span>,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.resize);
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-<span style="color: #bbbbbb">  </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>}
-<span style="color: #bbbbbb">  </span>render()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>render()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: render scene</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: render scene</span>
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-<span style="color: #bbbbbb">  </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>}
-<span style="color: #bbbbbb">  </span>resize()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>resize()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: adjust viewport and canvas</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: adjust viewport and canvas</span>
-<span style="color: #bbbbbb">  </span>}<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">  </span>}
-}<span style="color: #bbbbbb"></span>
+}
-Filament.init([<span style="color: #BA2121">&#39;triangle.filamat&#39;</span>],<span style="color: #bbbbbb"> </span>()<span style="color: #bbbbbb"> </span>=&gt;<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.app<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span>App()<span style="color: #bbbbbb"> </span>}<span style="color: #bbbbbb"> </span>);<span style="color: #bbbbbb"></span>
+Filament.init([<span style="color: #BA2121">&#39;triangle.filamat&#39;</span>],<span style="color: #BBB"> </span>()<span style="color: #BBB"> </span>=&gt;<span style="color: #BBB"> </span>{<span style="color: #BBB"> </span><span style="color: #008000">window</span>.app<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span>App()<span style="color: #BBB"> </span>}<span style="color: #BBB"> </span>);
 </pre></div>
 <p>The two calls to <code>bind()</code> allow us to pass instance methods as callbacks for animation and resize
 events.</p>
 <p><code>Filament.init()</code> consumes two things: a list of asset URLs and a callback.</p>
 <p>The callback will be triggered only after all assets finish downloading and the Filament module has
-become ready. In our callback, we simply instantiated the <code>App</code> object, since we&#x27;ll do most of the
+become ready. In our callback, we simply instantiated the <code>App</code> object, since we'll do most of the
 work in its constructor. We also set the app instance into a <code>Window</code> property to make it accessible
 from the developer console.</p>
 <p>Go ahead and download <a href="triangle.filamat">triangle.filamat</a> and place it in your project folder.
 This is a <em>material package</em>, which is a binary file that contains shaders and other bits of data
-that define a PBR material. We&#x27;ll learn more about material packages in the next tutorial.</p>
+that define a PBR material. We'll learn more about material packages in the next tutorial.</p>
 <h2>Spawn a local server</h2>
 <p>Because of CORS restrictions, your web app cannot fetch the material package directly from the
 file system. One way around this is to create a temporary server using Python or node:</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>python3 -m http.server     <span style="color: #3D7B7B; font-style: italic"># Python 3</span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>python3<span style="color: #BBB"> </span>-m<span style="color: #BBB"> </span>http.server<span style="color: #BBB">     </span><span style="color: #3D7B7B; font-style: italic"># Python 3</span>
-python -m SimpleHTTPServer <span style="color: #3D7B7B; font-style: italic"># Python 2.7</span>
+python<span style="color: #BBB"> </span>-m<span style="color: #BBB"> </span>SimpleHTTPServer<span style="color: #BBB"> </span><span style="color: #3D7B7B; font-style: italic"># Python 2.7</span>
-npx http-server -p <span style="color: #666666">8000</span>    <span style="color: #3D7B7B; font-style: italic"># nodejs</span>
+npx<span style="color: #BBB"> </span>http-server<span style="color: #BBB"> </span>-p<span style="color: #BBB"> </span><span style="color: #666">8000</span><span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic"># nodejs</span>
 </pre></div>
 <p>To see if this works, navigate to <a href="http://localhost:8000">http://localhost:8000</a> and check if you
 can load the page without any errors appearing in the developer console.</p>
-<p>Take care not to use Python&#x27;s simple server in production since it does not serve WebAssembly files
+<p>Take care not to use Python's simple server in production since it does not serve WebAssembly files
 with the correct MIME type.</p>
 <h2>Create the Engine and Scene</h2>
-<p>We now have a basic skeleton that can respond to paint and resize events. Let&#x27;s start adding
+<p>We now have a basic skeleton that can respond to paint and resize events. Let's start adding
 Filament objects to the app. Insert the following code into the top of the app constructor.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.canvas<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">document</span>.getElementsByTagName(<span style="color: #BA2121">&#39;canvas&#39;</span>)[<span style="color: #666666">0</span>];<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.canvas<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">document</span>.getElementsByTagName(<span style="color: #BA2121">&#39;canvas&#39;</span>)[<span style="color: #666">0</span>];
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>engine<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Engine.create(<span style="color: #008000; font-weight: bold">this</span>.canvas);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>engine<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Engine.create(<span style="color: #008000; font-weight: bold">this</span>.canvas);
 </pre></div>
 <p>The above snippet creates the <code>Engine</code> by passing it a canvas DOM object. The engine needs the
 canvas in order to create a WebGL 2.0 context in its contructor.</p>
 <p>The engine is a factory for many Filament entities, including <code>Scene</code>, which is a flat container of
-entities. Let&#x27;s go ahead and create a scene, then add a blank entity called <code>triangle</code> into the
+entities. Let's go ahead and create a scene, then add a blank entity called <code>triangle</code> into the
 scene.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.scene<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createScene();<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.scene<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createScene();
-<span style="color: #008000; font-weight: bold">this</span>.triangle<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.EntityManager.get().create();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.triangle<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.EntityManager.get().create();
-<span style="color: #008000; font-weight: bold">this</span>.scene.addEntity(<span style="color: #008000; font-weight: bold">this</span>.triangle);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.scene.addEntity(<span style="color: #008000; font-weight: bold">this</span>.triangle);
 </pre></div>
 <p>Filament uses an <a href="//en.wikipedia.org/wiki/Entity-component-system">Entity-Component System</a>.
@@ -112,30 +112,30 @@ The triangle entity in the above snippet does not yet have an associated compone
 tutorial we will make it into a <em>renderable</em>. Renderables are entities that have associated draw
 calls.</p>
 <h2>Construct typed arrays</h2>
-<p>Next we&#x27;ll create two typed arrays: a positions array with XY coordinates for each vertex, and a
+<p>Next we'll create two typed arrays: a positions array with XY coordinates for each vertex, and a
 colors array with a 32-bit word for each vertex.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>TRIANGLE_POSITIONS<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span><span style="color: #008000">Float32Array</span>([<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>TRIANGLE_POSITIONS<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span><span style="color: #008000">Float32Array</span>([
-<span style="color: #bbbbbb">    </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,
-<span style="color: #bbbbbb">    </span><span style="color: #008000">Math</span>.cos(<span style="color: #008000">Math</span>.PI<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span><span style="color: #666666">2</span><span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">3</span>),<span style="color: #bbbbbb"> </span><span style="color: #008000">Math</span>.sin(<span style="color: #008000">Math</span>.PI<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span><span style="color: #666666">2</span><span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">3</span>),<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">Math</span>.cos(<span style="color: #008000">Math</span>.PI<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span><span style="color: #666">2</span><span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">3</span>),<span style="color: #BBB"> </span><span style="color: #008000">Math</span>.sin(<span style="color: #008000">Math</span>.PI<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span><span style="color: #666">2</span><span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">3</span>),
-<span style="color: #bbbbbb">    </span><span style="color: #008000">Math</span>.cos(<span style="color: #008000">Math</span>.PI<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span><span style="color: #666666">4</span><span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">3</span>),<span style="color: #bbbbbb"> </span><span style="color: #008000">Math</span>.sin(<span style="color: #008000">Math</span>.PI<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span><span style="color: #666666">4</span><span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">3</span>),<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">Math</span>.cos(<span style="color: #008000">Math</span>.PI<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span><span style="color: #666">4</span><span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">3</span>),<span style="color: #BBB"> </span><span style="color: #008000">Math</span>.sin(<span style="color: #008000">Math</span>.PI<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span><span style="color: #666">4</span><span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">3</span>),
-]);<span style="color: #bbbbbb"></span>
+]);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>TRIANGLE_COLORS<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span><span style="color: #008000">Uint32Array</span>([<span style="color: #666666">0xffff0000</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0xff00ff00</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0xff0000ff</span>]);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>TRIANGLE_COLORS<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span><span style="color: #008000">Uint32Array</span>([<span style="color: #666">0xffff0000</span>,<span style="color: #BBB"> </span><span style="color: #666">0xff00ff00</span>,<span style="color: #BBB"> </span><span style="color: #666">0xff0000ff</span>]);
 </pre></div>
-<p>Next we&#x27;ll use the positions and colors buffers to create a single <code>VertexBuffer</code> object.</p>
+<p>Next we'll use the positions and colors buffers to create a single <code>VertexBuffer</code> object.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>VertexAttribute<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.VertexAttribute;<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>VertexAttribute<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.VertexAttribute;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>AttributeType<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.VertexBuffer$AttributeType;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>AttributeType<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.VertexBuffer$AttributeType;
-<span style="color: #008000; font-weight: bold">this</span>.vb<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.VertexBuffer.Builder()<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.vb<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.VertexBuffer.Builder()
-<span style="color: #bbbbbb">    </span>.vertexCount(<span style="color: #666666">3</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.vertexCount(<span style="color: #666">3</span>)
-<span style="color: #bbbbbb">    </span>.bufferCount(<span style="color: #666666">2</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.bufferCount(<span style="color: #666">2</span>)
-<span style="color: #bbbbbb">    </span>.attribute(VertexAttribute.POSITION,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>AttributeType.FLOAT2,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">8</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.attribute(VertexAttribute.POSITION,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>AttributeType.FLOAT2,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">8</span>)
-<span style="color: #bbbbbb">    </span>.attribute(VertexAttribute.COLOR,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span>AttributeType.UBYTE4,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">4</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.attribute(VertexAttribute.COLOR,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span>AttributeType.UBYTE4,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">4</span>)
-<span style="color: #bbbbbb">    </span>.normalized(VertexAttribute.COLOR)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.normalized(VertexAttribute.COLOR)
-<span style="color: #bbbbbb">    </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.build(engine);
-<span style="color: #008000; font-weight: bold">this</span>.vb.setBufferAt(engine,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>TRIANGLE_POSITIONS);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.vb.setBufferAt(engine,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>TRIANGLE_POSITIONS);
-<span style="color: #008000; font-weight: bold">this</span>.vb.setBufferAt(engine,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span>TRIANGLE_COLORS);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.vb.setBufferAt(engine,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span>TRIANGLE_COLORS);
 </pre></div>
 <p>The above snippet first creates aliases for two enum types, then constructs the vertex buffer using
@@ -147,74 +147,74 @@ self-documenting.</p>
 <p>Our app sets up two buffer slots in the vertex buffer, and each slot is associated with a single
 attribute. Alternatively, we could have interleaved or concatenated these attributes into a single
 buffer slot.</p>
-<p>Next we&#x27;ll construct an index buffer. The index buffer for our triangle is trivial: it simply holds
+<p>Next we'll construct an index buffer. The index buffer for our triangle is trivial: it simply holds
 the integers 0,1,2.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.ib<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.IndexBuffer.Builder()<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.ib<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.IndexBuffer.Builder()
-<span style="color: #bbbbbb">    </span>.indexCount(<span style="color: #666666">3</span>)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.indexCount(<span style="color: #666">3</span>)
-<span style="color: #bbbbbb">    </span>.bufferType(Filament.IndexBuffer$IndexType.USHORT)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.bufferType(Filament.IndexBuffer$IndexType.USHORT)
-<span style="color: #bbbbbb">    </span>.build(engine);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.build(engine);
-<span style="color: #008000; font-weight: bold">this</span>.ib.setBuffer(engine,<span style="color: #bbbbbb"> </span><span style="color: #AA22FF; font-weight: bold">new</span><span style="color: #bbbbbb"> </span><span style="color: #008000">Uint16Array</span>([<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">2</span>]));<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.ib.setBuffer(engine,<span style="color: #BBB"> </span><span style="color: #A2F; font-weight: bold">new</span><span style="color: #BBB"> </span><span style="color: #008000">Uint16Array</span>([<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">2</span>]));
 </pre></div>
 <p>Note that constructing an index buffer is similar to constructing a vertex buffer, but it only has
 one buffer slot, and it can only contain two types of data (USHORT or UINT).</p>
 <h2>Finish up initialization</h2>
-<p>Next let&#x27;s construct an actual <code>Material</code> from the material package that was downloaded (the
+<p>Next let's construct an actual <code>Material</code> from the material package that was downloaded (the
 material is an object; the package is just a binary blob), then extract the default
 <code>MaterialInstance</code> from the material object. Material instances have concrete values for their
-parameters, and they can be bound to renderables. We&#x27;ll learn more about material instances in the
+parameters, and they can be bound to renderables. We'll learn more about material instances in the
 next tutorial.</p>
 <p>After extracting the material instance, we can finally create a renderable component for the
 triangle by setting up a bounding box and passing in the vertex and index buffers.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>mat<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createMaterial(<span style="color: #BA2121">&#39;triangle.filamat&#39;</span>);<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>mat<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createMaterial(<span style="color: #BA2121">&#39;triangle.filamat&#39;</span>);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>matinst<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>mat.getDefaultInstance();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>matinst<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>mat.getDefaultInstance();
-Filament.RenderableManager.Builder(<span style="color: #666666">1</span>)<span style="color: #bbbbbb"></span>
+Filament.RenderableManager.Builder(<span style="color: #666">1</span>)
-<span style="color: #bbbbbb">    </span>.boundingBox({<span style="color: #bbbbbb"> </span>center<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">-1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">-1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">-1</span>],<span style="color: #bbbbbb"> </span>halfExtent<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>]<span style="color: #bbbbbb"> </span>})<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.boundingBox({<span style="color: #BBB"> </span>center<span style="color: #666">:</span><span style="color: #BBB"> </span>[<span style="color: #666">-1</span>,<span style="color: #BBB"> </span><span style="color: #666">-1</span>,<span style="color: #BBB"> </span><span style="color: #666">-1</span>],<span style="color: #BBB"> </span>halfExtent<span style="color: #666">:</span><span style="color: #BBB"> </span>[<span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>]<span style="color: #BBB"> </span>})
-<span style="color: #bbbbbb">    </span>.material(<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>matinst)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.material(<span style="color: #666">0</span>,<span style="color: #BBB"> </span>matinst)
-<span style="color: #bbbbbb">    </span>.geometry(<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>Filament.RenderableManager$PrimitiveType.TRIANGLES,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.vb,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.ib)<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.geometry(<span style="color: #666">0</span>,<span style="color: #BBB"> </span>Filament.RenderableManager$PrimitiveType.TRIANGLES,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.vb,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.ib)
-<span style="color: #bbbbbb">    </span>.build(engine,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.triangle);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span>.build(engine,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.triangle);
 </pre></div>
-<p>Next let&#x27;s wrap up the initialization routine by creating the swap chain, renderer, camera, and
+<p>Next let's wrap up the initialization routine by creating the swap chain, renderer, camera, and
 view.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.swapChain<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createSwapChain();<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">this</span>.swapChain<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createSwapChain();
-<span style="color: #008000; font-weight: bold">this</span>.renderer<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createRenderer();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.renderer<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createRenderer();
-<span style="color: #008000; font-weight: bold">this</span>.camera<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createCamera(Filament.EntityManager.get().create());<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.camera<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createCamera(Filament.EntityManager.get().create());
-<span style="color: #008000; font-weight: bold">this</span>.view<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>engine.createView();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.view<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>engine.createView();
-<span style="color: #008000; font-weight: bold">this</span>.view.setCamera(<span style="color: #008000; font-weight: bold">this</span>.camera);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.view.setCamera(<span style="color: #008000; font-weight: bold">this</span>.camera);
-<span style="color: #008000; font-weight: bold">this</span>.view.setScene(<span style="color: #008000; font-weight: bold">this</span>.scene);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.view.setScene(<span style="color: #008000; font-weight: bold">this</span>.scene);
-<span style="color: #3D7B7B; font-style: italic">// Set up a blue-green background:</span><span style="color: #bbbbbb"></span>
+<span style="color: #3D7B7B; font-style: italic">// Set up a blue-green background:</span>
-<span style="color: #008000; font-weight: bold">this</span>.renderer.setClearOptions({clearColor<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span>[<span style="color: #666666">0.0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0.2</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1.0</span>],<span style="color: #bbbbbb"> </span>clear<span style="color: #666666">:</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">true</span>});<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.renderer.setClearOptions({clearColor<span style="color: #666">:</span><span style="color: #BBB"> </span>[<span style="color: #666">0.0</span>,<span style="color: #BBB"> </span><span style="color: #666">0.1</span>,<span style="color: #BBB"> </span><span style="color: #666">0.2</span>,<span style="color: #BBB"> </span><span style="color: #666">1.0</span>],<span style="color: #BBB"> </span>clear<span style="color: #666">:</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">true</span>});
-<span style="color: #3D7B7B; font-style: italic">// Adjust the initial viewport:</span><span style="color: #bbbbbb"></span>
+<span style="color: #3D7B7B; font-style: italic">// Adjust the initial viewport:</span>
-<span style="color: #008000; font-weight: bold">this</span>.resize();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.resize();
 </pre></div>
-<p>At this point, we&#x27;re done creating all Filament entities, and the code should run without errors.
+<p>At this point, we're done creating all Filament entities, and the code should run without errors.
 However the canvas is still blank!</p>
 <h2>Render and resize handlers</h2>
 <p>Recall that our App class has a skeletal render method, which the browser calls every time it needs
 to repaint. Often this is 60 times a second.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>render()<span style="color: #bbbbbb"> </span>{<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span>render()<span style="color: #BBB"> </span>{
-<span style="color: #bbbbbb">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: render scene</span><span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #3D7B7B; font-style: italic">// TODO: render scene</span>
-<span style="color: #bbbbbb">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);<span style="color: #bbbbbb"></span>
+<span style="color: #BBB">    </span><span style="color: #008000">window</span>.requestAnimationFrame(<span style="color: #008000; font-weight: bold">this</span>.render);
-}<span style="color: #bbbbbb"></span>
+}
 </pre></div>
-<p>Let&#x27;s flesh this out by rotating the triangle and invoking the Filament renderer. Add the following
+<p>Let's flesh this out by rotating the triangle and invoking the Filament renderer. Add the following
 code to the top of the render method.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #3D7B7B; font-style: italic">// Rotate the triangle.</span><span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #3D7B7B; font-style: italic">// Rotate the triangle.</span>
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>radians<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">Date</span>.now()<span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span><span style="color: #666666">1000</span>;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>radians<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">Date</span>.now()<span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span><span style="color: #666">1000</span>;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>transform<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>mat4.fromRotation(mat4.create(),<span style="color: #bbbbbb"> </span>radians,<span style="color: #bbbbbb"> </span>[<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>]);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>transform<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>mat4.fromRotation(mat4.create(),<span style="color: #BBB"> </span>radians,<span style="color: #BBB"> </span>[<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>]);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>tcm<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.getTransformManager();<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>tcm<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.engine.getTransformManager();
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>inst<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>tcm.getInstance(<span style="color: #008000; font-weight: bold">this</span>.triangle);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>inst<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>tcm.getInstance(<span style="color: #008000; font-weight: bold">this</span>.triangle);
-tcm.setTransform(inst,<span style="color: #bbbbbb"> </span>transform);<span style="color: #bbbbbb"></span>
+tcm.setTransform(inst,<span style="color: #BBB"> </span>transform);
-inst.<span style="color: #AA22FF; font-weight: bold">delete</span>();<span style="color: #bbbbbb"></span>
+inst.<span style="color: #A2F; font-weight: bold">delete</span>();
-<span style="color: #3D7B7B; font-style: italic">// Render the frame.</span><span style="color: #bbbbbb"></span>
+<span style="color: #3D7B7B; font-style: italic">// Render the frame.</span>
-<span style="color: #008000; font-weight: bold">this</span>.renderer.render(<span style="color: #008000; font-weight: bold">this</span>.swapChain,<span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.view);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.renderer.render(<span style="color: #008000; font-weight: bold">this</span>.swapChain,<span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.view);
 </pre></div>
 <p>The first half of our render method obtains the transform component of the triangle entity and uses
@@ -225,19 +225,19 @@ that it wants to skip a frame, hence the <code>if</code> statement.</p>
 <p>One last step. Add the following code to the resize method. This adjusts the resolution of the
 rendering surface when the window size changes, taking <code>devicePixelRatio</code> into account for high-DPI
 displays. It also adjusts the camera frustum accordingly.</p>
-<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>dpr<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.devicePixelRatio;<span style="color: #bbbbbb"></span>
+<div class="highlight" style="background: #f8f8f8"><pre style="line-height: 125%;"><span></span><span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>dpr<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.devicePixelRatio;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>width<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.width<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.innerWidth<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span>dpr;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>width<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.width<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.innerWidth<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span>dpr;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>height<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.height<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span><span style="color: #008000">window</span>.innerHeight<span style="color: #bbbbbb"> </span><span style="color: #666666">*</span><span style="color: #bbbbbb"> </span>dpr;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>height<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000; font-weight: bold">this</span>.canvas.height<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span><span style="color: #008000">window</span>.innerHeight<span style="color: #BBB"> </span><span style="color: #666">*</span><span style="color: #BBB"> </span>dpr;
-<span style="color: #008000; font-weight: bold">this</span>.view.setViewport([<span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span>width,<span style="color: #bbbbbb"> </span>height]);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.view.setViewport([<span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span>width,<span style="color: #BBB"> </span>height]);
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>aspect<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>width<span style="color: #bbbbbb"> </span><span style="color: #666666">/</span><span style="color: #bbbbbb"> </span>height;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>aspect<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>width<span style="color: #BBB"> </span><span style="color: #666">/</span><span style="color: #BBB"> </span>height;
-<span style="color: #008000; font-weight: bold">const</span><span style="color: #bbbbbb"> </span>Projection<span style="color: #bbbbbb"> </span><span style="color: #666666">=</span><span style="color: #bbbbbb"> </span>Filament.Camera$Projection;<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">const</span><span style="color: #BBB"> </span>Projection<span style="color: #BBB"> </span><span style="color: #666">=</span><span style="color: #BBB"> </span>Filament.Camera$Projection;
-<span style="color: #008000; font-weight: bold">this</span>.camera.setProjection(Projection.ORTHO,<span style="color: #bbbbbb"> </span><span style="color: #666666">-</span>aspect,<span style="color: #bbbbbb"> </span>aspect,<span style="color: #bbbbbb"> </span><span style="color: #666666">-1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">0</span>,<span style="color: #bbbbbb"> </span><span style="color: #666666">1</span>);<span style="color: #bbbbbb"></span>
+<span style="color: #008000; font-weight: bold">this</span>.camera.setProjection(Projection.ORTHO,<span style="color: #BBB"> </span><span style="color: #666">-</span>aspect,<span style="color: #BBB"> </span>aspect,<span style="color: #BBB"> </span><span style="color: #666">-1</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>,<span style="color: #BBB"> </span><span style="color: #666">0</span>,<span style="color: #BBB"> </span><span style="color: #666">1</span>);
 </pre></div>
 <p>You should now have a spinning triangle! The completed JavaScript is available
 <a href="tutorial_triangle.js">here</a>.</p>
-<p>In the <a href="tutorial_redball.html">next tutorial</a>, we&#x27;ll take a closer look at Filament materials and 3D rendering.</p>
+<p>In the <a href="tutorial_redball.html">next tutorial</a>, we'll take a closer look at Filament materials and 3D rendering.</p>
 </body>
 </html>
@@ -5,6 +5,18 @@ set(TARGET backend)
 set(PUBLIC_HDR_DIR include)
 set(GENERATION_ROOT ${CMAKE_CURRENT_BINARY_DIR})
 # ==================================================================================================
 # Compilation options
 # ==================================================================================================
 #
 set(BACKEND_SANITIZATION "" CACHE STRING "Sanitization option")
 set_property(CACHE BACKEND_SANITIZATION PROPERTY STRINGS ";ASAN")
 set(BACKEND_SANITIZERS)
 if (BACKEND_SANITIZATION STREQUAL "ASAN")
    set(BACKEND_SANITIZERS -fsanitize=address)
 endif()
 # ==================================================================================================
 # Sources and headers
 # ==================================================================================================
@@ -472,6 +484,7 @@ target_compile_options(${TARGET} PRIVATE
        ${OSMESA_COMPILE_FLAGS}
        $<$<CONFIG:Release>:${OPTIMIZATION_FLAGS}>
        $<$<AND:$<PLATFORM_ID:Darwin>,$<CONFIG:Release>>:${DARWIN_OPTIMIZATION_FLAGS}>
        ${BACKEND_SANITIZERS}
 )
 if (FILAMENT_SUPPORTS_METAL)
@@ -482,6 +495,8 @@ if (FILAMENT_SUPPORTS_WEBGPU)
    target_compile_definitions(${TARGET} PRIVATE $<$<BOOL:${FILAMENT_WEBGPU_IMMEDIATE_ERROR_HANDLING}>:FILAMENT_WEBGPU_IMMEDIATE_ERROR_HANDLING>)
 endif()
 target_link_options(${TARGET} PRIVATE ${BACKEND_SANITIZERS})
 target_link_libraries(${TARGET} PRIVATE
        ${OSMESA_LINKER_FLAGS}
        $<$<AND:$<PLATFORM_ID:Linux>,$<CONFIG:Release>>:${LINUX_LINKER_OPTIMIZATION_FLAGS}>
@@ -551,6 +566,8 @@ if (APPLE AND NOT IOS)
         test/test_RenderExternalImage.cpp)
    add_library(backend_test STATIC ${BACKEND_TEST_SRC})
    target_link_libraries(backend_test PUBLIC ${BACKEND_TEST_LIBS})
    target_compile_options(backend_test PRIVATE ${BACKEND_SANITIZERS})
    target_link_options(backend_test PRIVATE ${BACKEND_SANITIZERS})
    set(BACKEND_TEST_DEPS
            OSDependent
@@ -589,6 +606,7 @@ if (APPLE AND NOT IOS)
       # linker from removing "unused" symbols.
       target_link_libraries(backend_test_mac PRIVATE -force_load backend_test)
       set_target_properties(backend_test_mac PROPERTIES FOLDER Tests)
       target_link_options(backend_test_mac PRIVATE ${BACKEND_SANITIZERS})
       # This is needed after XCode 15.3
       set_target_properties(backend_test_mac PROPERTIES BUILD_WITH_INSTALL_RPATH TRUE)
@@ -598,6 +616,8 @@ endif()
 if (LINUX)
    add_executable(backend_test_linux test/linux_runner.cpp ${BACKEND_TEST_SRC})
    target_compile_options(backend_test_linux PRIVATE ${BACKEND_SANITIZERS})
    target_link_options(backend_test_linux PRIVATE ${BACKEND_SANITIZERS})
    target_link_libraries(backend_test_linux PRIVATE ${BACKEND_TEST_LIBS})
    set_target_properties(backend_test_linux PROPERTIES FOLDER Tests)
 endif()
@@ -39,6 +39,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <utils/StaticString.h>
 /**
 * Types and enums used by filament's driver.
@@ -1139,6 +1140,7 @@ struct ExternalSamplerDatum {
 static_assert(sizeof(ExternalSamplerDatum) == 12);
 struct DescriptorSetLayout {
    std::variant<utils::StaticString, utils::CString, std::monostate> label;
    utils::FixedCapacityVector<DescriptorSetLayoutBinding> bindings;
 //  TODO: uncomment when needed
@@ -1455,6 +1457,11 @@ enum class Workaround : uint16_t {
    DISABLE_BLIT_INTO_TEXTURE_ARRAY,
    // Multiple workarounds needed for PowerVR GPUs
    POWER_VR_SHADER_WORKAROUNDS,
    // Some browsers, such as Firefox on Mac, struggle with slow shader compile/link times when
    // creating programs for the default material, leading to startup stutters. This workaround
    // prevents these stutters by not precaching depth variants of the default material for those
    // particular browsers.
    DISABLE_DEPTH_PRECACHE_FOR_DEFAULT_MATERIAL,
 };
 using StereoscopicType = backend::Platform::StereoscopicType;
@@ -600,6 +600,12 @@ void OpenGLContext::initBugs(Bugs* bugs, Extensions const& exts,
        // For Mozilla, the issue appears to be observed regardless of whether the renderer is
        // ANGLE or not. (b/376125497)
        bugs->rebind_buffer_after_deletion = true;
        // We disable depth precache for the default material on Mozilla FireFox. It struggles with
        // slow shader compile/link times if the shader contains large arrays of uniform. Some depth
        // program variants have skinning-related data, which incurs this slowness and end up
        // causing an initial startup stalls. (b/392917621)
        bugs->disable_depth_precache_for_default_material = true;
    }
 #ifdef BACKEND_OPENGL_VERSION_GLES
@@ -328,6 +328,11 @@ public:
        // bugs or performance issues.
        bool force_feature_level0;
        // Some browsers, such as Firefox on Mac, struggle with slow shader compile/link times when
        // creating programs for the default material, leading to startup stutters. This workaround
        // prevents these stutters by not precaching depth variants of the default material for
        // those particular browsers.
        bool disable_depth_precache_for_default_material;
    } bugs = {};
@@ -569,6 +574,9 @@ private:
            {   bugs.force_feature_level0,
                    "force_feature_level0",
                    ""},
            {   bugs.disable_depth_precache_for_default_material,
                    "disable_depth_precache_for_default_material",
                    ""},
    }};
    // this is chosen to minimize code size
@@ -2435,6 +2435,8 @@ bool OpenGLDriver::isWorkaroundNeeded(Workaround workaround) {
            return mContext.bugs.disable_blit_into_texture_array;
        case Workaround::POWER_VR_SHADER_WORKAROUNDS:
            return mContext.bugs.powervr_shader_workarounds;
        case Workaround::DISABLE_DEPTH_PRECACHE_FOR_DEFAULT_MATERIAL:
            return mContext.bugs.disable_depth_precache_for_default_material;
        default:
            return false;
    }
@@ -27,6 +27,7 @@
 #include <webgpu/webgpu_cpp.h>
 #include <algorithm>
 #include <sstream>
 #include <string_view>
 #include <vector>
@@ -125,21 +126,64 @@ namespace {
    return module;
 }
 // This is a 1 to 1 mapping of the ReservedSpecializationConstants enum in EngineEnums.h
 // The _hack is a workaround until https://issues.chromium.org/issues/42250586 is resolved
 // This workaround is the same one being used on the generateSpecializationConstant() function
 wgpu::StringView getSpecConstantStringId(uint32_t id) {
    switch (id) {
        case 0:
            return "0";// BACKEND_FEATURE_LEVEL_hack
        case 1:
            return "1";// CONFIG_MAX_INSTANCES_hack
        case 2:
            return "2";// ONFIG_STATIC_TEXTURE_TARGET_WORKAROUND_hack
        case 3:
            return "3";// CONFIG_SRGB_SWAPCHAIN_EMULATION_hack
        case 4:
            return "4";// CONFIG_FROXEL_BUFFER_HEIGHT_hack
        case 5:
            return "5";// CONFIG_POWER_VR_SHADER_WORKAROUNDS_hack
        case 6:
            return "6";// CONFIG_DEBUG_DIRECTIONAL_SHADOWMAP_hack
        case 7:
            return "7";// CONFIG_DEBUG_FROXEL_VISUALIZATION_hack
        case 8:
            return "8";// CONFIG_STEREO_EYE_COUNT_hack
        case 9:
            return "9";// CONFIG_SH_BANDS_COUNT_hack
        case 10:
            return "10";// CONFIG_SHADOW_SAMPLING_METHOD_hack
        default:
            PANIC_POSTCONDITION("Unknown/unhandled spec constant key/id: %d", id);
    }
 }
 std::vector<wgpu::ConstantEntry> convertConstants(
        utils::FixedCapacityVector<filament::backend::Program::SpecializationConstant> const&
                constantsInfo) {
-    std::vector<wgpu::ConstantEntry> constants(constantsInfo.size());
+    std::vector<wgpu::ConstantEntry> constants;
-    for (size_t i = 0; i < constantsInfo.size(); i++) {
+    constants.reserve(constantsInfo.size());
-        filament::backend::Program::SpecializationConstant const& specConstant = constantsInfo[i];
+    for (filament::backend::Program::SpecializationConstant const& constant: constantsInfo) {
-        wgpu::ConstantEntry& constantEntry = constants[i];
+        // CONFIG_MAX_INSTANCES (1) and CONFIG_FROXEL_BUFFER_HEIGHT (4) will not be present
-        constantEntry.key = wgpu::StringView(std::to_string(specConstant.id));
+        // as constant overrides in the generated WGSL, because WGSL doesn't support specialization
-        if (auto* v = std::get_if<int32_t>(&specConstant.value)) {
+        // constants as an array length
-            constantEntry.value = static_cast<double>(*v);
+        // More information at https://github.com/gpuweb/gpuweb/issues/572#issuecomment-649760005
-        } else if (auto* f = std::get_if<float>(&specConstant.value)) {
+        // CONFIG_SRGB_SWAPCHAIN_EMULATION (3) is being skipped all together since it's only
-            constantEntry.value = static_cast<double>(*f);
+        // included for the case of mFeatureLevel == FeatureLevel::FEATURE_LEVEL_0, which should
-        } else if (auto* b = std::get_if<bool>(&specConstant.value)) {
+        // not be possible for WebGPU
-            constantEntry.value = *b ? 0.0 : 1.0;
+        if (constant.id == 1 || constant.id == 3 || constant.id == 4) {
            continue;
        }
        double value = 0.0;
        if (auto* v = std::get_if<int32_t>(&constant.value)) {
            value = static_cast<double>(*v);
        } else if (auto* f = std::get_if<float>(&constant.value)) {
            value = static_cast<double>(*f);
        } else if (auto* b = std::get_if<bool>(&constant.value)) {
            value = *b ? 0.0 : 1.0;
        }
        constants.push_back(
                wgpu::ConstantEntry{ .key = getSpecConstantStringId(constant.id), .value = value });
    }
    return constants;
 }
@@ -292,7 +292,22 @@ void WebGPUDriver::endFrame(uint32_t frameId) {
 void WebGPUDriver::flush(int) {
 }
-void WebGPUDriver::finish(int) {
+void WebGPUDriver::finish(int /* dummy */) {
    if (mCommandEncoder != nullptr) {
        // submit the command buffer thus far...
        assert_invariant(mRenderPassEncoder == nullptr);
        wgpu::CommandBufferDescriptor commandBufferDescriptor{
            .label = "command_buffer",
        };
        mCommandBuffer = mCommandEncoder.Finish(&commandBufferDescriptor);
        assert_invariant(mCommandBuffer);
        mQueue.Submit(1, &mCommandBuffer);
        mCommandBuffer = nullptr;
        // create a new command buffer encoder to continue recording the next command for frame...
        wgpu::CommandEncoderDescriptor commandEncoderDescriptor = { .label = "command_encoder" };
        mCommandEncoder = mDevice.CreateCommandEncoder(&commandEncoderDescriptor);
        assert_invariant(mCommandEncoder);
    }
 }
 void WebGPUDriver::destroyRenderPrimitive(Handle<HwRenderPrimitive> rph) {
@@ -374,9 +389,7 @@ Handle<HwTexture> WebGPUDriver::createTextureS() noexcept {
    return allocHandle<WGPUTexture>();
 }
-Handle<HwTexture> WebGPUDriver::importTextureS() noexcept {
+Handle<HwTexture> WebGPUDriver::importTextureS() noexcept { return allocHandle<WGPUTexture>(); }
    return Handle<HwTexture>((Handle<HwTexture>::HandleId) mNextFakeHandle++);
 }
 Handle<HwProgram> WebGPUDriver::createProgramS() noexcept {
    return allocHandle<WGPUProgram>();
@@ -395,7 +408,7 @@ Handle<HwIndexBuffer> WebGPUDriver::createIndexBufferS() noexcept {
 }
 Handle<HwTexture> WebGPUDriver::createTextureViewS() noexcept {
-    return Handle<HwTexture>((Handle<HwTexture>::HandleId) mNextFakeHandle++);
+    return allocHandle<WGPUTexture>();
 }
 Handle<HwBufferObject> WebGPUDriver::createBufferObjectS() noexcept {
@@ -423,7 +436,7 @@ Handle<HwVertexBufferInfo> WebGPUDriver::createVertexBufferInfoS() noexcept {
 }
 Handle<HwTexture> WebGPUDriver::createTextureViewSwizzleS() noexcept {
-    return Handle<HwTexture>((Handle<HwTexture>::HandleId) mNextFakeHandle++);
+    return allocHandle<WGPUTexture>();
 }
 Handle<HwRenderTarget> WebGPUDriver::createDefaultRenderTargetS() noexcept {
@@ -435,15 +448,15 @@ Handle<HwDescriptorSetLayout> WebGPUDriver::createDescriptorSetLayoutS() noexcep
 }
 Handle<HwTexture> WebGPUDriver::createTextureExternalImageS() noexcept {
-    return Handle<HwTexture>((Handle<HwTexture>::HandleId) mNextFakeHandle++);
+    return allocHandle<WGPUTexture>();
 }
 Handle<HwTexture> WebGPUDriver::createTextureExternalImage2S() noexcept {
-    return Handle<HwTexture>((Handle<HwTexture>::HandleId) mNextFakeHandle++);
+    return allocHandle<WGPUTexture>();
 }
 Handle<HwTexture> WebGPUDriver::createTextureExternalImagePlaneS() noexcept {
-    return Handle<HwTexture>((Handle<HwTexture>::HandleId) mNextFakeHandle++);
+    return allocHandle<WGPUTexture>();
 }
 void WebGPUDriver::createSwapChainR(Handle<HwSwapChain> sch, void* nativeWindow, uint64_t flags) {
@@ -455,6 +468,8 @@ void WebGPUDriver::createSwapChainR(Handle<HwSwapChain> sch, void* nativeWindow,
    mSwapChain = constructHandle<WebGPUSwapChain>(sch, std::move(surface), surfaceSize, mAdapter,
            mDevice, flags);
    assert_invariant(mSwapChain);
    WebGPUDescriptorSet::initializeDummyResourcesIfNotAlready(mDevice,
            mSwapChain->getColorFormat());
    FWGPU_LOGW << "WebGPU support is still essentially a no-op at this point in development (only "
                  "background components have been instantiated/selected, such as surface/screen, "
                  "graphics device/GPU, etc.), thus nothing is being drawn to the screen."
@@ -497,30 +512,46 @@ void WebGPUDriver::createBufferObjectR(Handle<HwBufferObject> boh, uint32_t byte
 void WebGPUDriver::createTextureR(Handle<HwTexture> th, SamplerType target, uint8_t levels,
        TextureFormat format, uint8_t samples, uint32_t w, uint32_t h, uint32_t depth,
-        TextureUsage usage) {}
+        TextureUsage usage) {
    constructHandle<WGPUTexture>(th, target, levels, format, samples, w, h, depth, usage, mDevice);
 }
 void WebGPUDriver::createTextureViewR(Handle<HwTexture> th, Handle<HwTexture> srch,
-        uint8_t baseLevel, uint8_t levelCount) {}
+        uint8_t baseLevel, uint8_t levelCount) {
    auto source = handleCast<WGPUTexture>(srch);
    constructHandle<WGPUTexture>(th, source, baseLevel, levelCount);
 }
 void WebGPUDriver::createTextureViewSwizzleR(Handle<HwTexture> th, Handle<HwTexture> srch,
        backend::TextureSwizzle r, backend::TextureSwizzle g, backend::TextureSwizzle b,
-        backend::TextureSwizzle a) {}
+        backend::TextureSwizzle a) {
    PANIC_POSTCONDITION("Swizzle WebGPU Texture is not supported");
 }
 void WebGPUDriver::createTextureExternalImage2R(Handle<HwTexture> th, backend::SamplerType target,
        backend::TextureFormat format, uint32_t width, uint32_t height, backend::TextureUsage usage,
-        Platform::ExternalImageHandleRef externalImage) {}
+        Platform::ExternalImageHandleRef externalImage) {
    PANIC_POSTCONDITION("External WebGPU Texture is not supported");
 }
 void WebGPUDriver::createTextureExternalImageR(Handle<HwTexture> th, backend::SamplerType target,
        backend::TextureFormat format, uint32_t width, uint32_t height, backend::TextureUsage usage,
-        void* externalImage) {}
+        void* externalImage) {
    PANIC_POSTCONDITION("External WebGPU Texture is not supported");
 }
 void WebGPUDriver::createTextureExternalImagePlaneR(Handle<HwTexture> th,
        backend::TextureFormat format, uint32_t width, uint32_t height, backend::TextureUsage usage,
-        void* image, uint32_t plane) {}
+        void* image, uint32_t plane) {
    PANIC_POSTCONDITION("External WebGPU Texture is not supported");
 }
 void WebGPUDriver::importTextureR(Handle<HwTexture> th, intptr_t id, SamplerType target,
        uint8_t levels, TextureFormat format, uint8_t samples, uint32_t w, uint32_t h,
-        uint32_t depth, TextureUsage usage) {}
+        uint32_t depth, TextureUsage usage) {
    PANIC_POSTCONDITION("Import WebGPU Texture is not supported");
 }
 void WebGPUDriver::createRenderPrimitiveR(Handle<HwRenderPrimitive> rph, Handle<HwVertexBuffer> vbh,
        Handle<HwIndexBuffer> ibh, PrimitiveType pt) {
@@ -560,7 +591,7 @@ void WebGPUDriver::createDescriptorSetLayoutR(Handle<HwDescriptorSetLayout> dslh
 void WebGPUDriver::createDescriptorSetR(Handle<HwDescriptorSet> dsh,
        Handle<HwDescriptorSetLayout> dslh) {
    auto layout = handleCast<WebGPUDescriptorSetLayout>(dslh);
-    constructHandle<WebGPUDescriptorSet>(dsh, layout->getLayout(), layout->getLayoutSize());
+    constructHandle<WebGPUDescriptorSet>(dsh, layout->getLayout(), layout->getBindGroupEntries());
 }
 Handle<HwStream> WebGPUDriver::createStreamNative(void* nativeStream) {
@@ -597,7 +628,7 @@ FenceStatus WebGPUDriver::getFenceStatus(Handle<HwFence> fh) {
 // We create all textures using VK_IMAGE_TILING_OPTIMAL, so our definition of "supported" is that
 // the GPU supports the given texture format with non-zero optimal tiling features.
 bool WebGPUDriver::isTextureFormatSupported(TextureFormat format) {
-    return true;
+    return WGPUTexture::fToWGPUTextureFormat(format) != wgpu::TextureFormat::Undefined;
 }
 bool WebGPUDriver::isTextureSwizzleSupported() {
@@ -745,13 +776,31 @@ void WebGPUDriver::compilePrograms(CompilerPriorityQueue priority,
    }
 }
-void WebGPUDriver::beginRenderPass(Handle<HwRenderTarget> rth, const RenderPassParams& params) {
+void WebGPUDriver::beginRenderPass(Handle<HwRenderTarget> rth, RenderPassParams const& params) {
    wgpu::CommandEncoderDescriptor commandEncoderDescriptor = {
        .label = "command_encoder"
    };
    mCommandEncoder = mDevice.CreateCommandEncoder(&commandEncoderDescriptor);
    assert_invariant(mCommandEncoder);
    auto* renderTarget = handleCast<WGPURenderTarget>(rth);
    // if (renderTarget == mDefaultRenderTarget) {
    //     FWGPU_LOGW << "Default render target"
    //                << utils::io::endl;
    // } else {
    //     FWGPU_LOGW << "Non Default render target"
    //                << utils::io::endl;
    // }
    wgpu::RenderPassDescriptor renderPassDescriptor2;
    wgpu::RenderPassDepthStencilAttachment depthStencilAttachment{
        .view = mSwapChain->getDepthTextureView(),
        .depthLoadOp = WGPURenderTarget::getLoadOperation(params, TargetBufferFlags::DEPTH),
        .depthStoreOp = WGPURenderTarget::getStoreOperation(params, TargetBufferFlags::DEPTH),
        .depthClearValue = static_cast<float>(params.clearDepth),
        .depthReadOnly = (params.readOnlyDepthStencil & RenderPassParams::READONLY_DEPTH) > 0,
        .stencilLoadOp = WGPURenderTarget::getLoadOperation(params, TargetBufferFlags::STENCIL),
        .stencilStoreOp = WGPURenderTarget::getStoreOperation(params, TargetBufferFlags::STENCIL),
        .stencilClearValue = params.clearStencil,
        .stencilReadOnly = (params.readOnlyDepthStencil & RenderPassParams::READONLY_STENCIL) > 0
    };
    renderTarget->setUpRenderPassAttachments(renderPassDescriptor2, mTextureView, params);
    renderPassDescriptor2.depthStencilAttachment = &depthStencilAttachment;
    // TODO: Remove this code once WebGPU pipeline is implemented
    static float red = 1.0f;
    if (red - 0.01 > 0) {
@@ -776,19 +825,14 @@ void WebGPUDriver::beginRenderPass(Handle<HwRenderTarget> rth, const RenderPassP
        .timestampWrites = nullptr,
    };
-    mRenderPassEncoder = mCommandEncoder.BeginRenderPass(&renderPassDescriptor);
+    mRenderPassEncoder = mCommandEncoder.BeginRenderPass(&renderPassDescriptor2);
    mRenderPassEncoder.SetViewport(params.viewport.left, params.viewport.bottom,
            params.viewport.width, params.viewport.height, params.depthRange.near, params.depthRange.far);
 }
-void WebGPUDriver::endRenderPass(int) {
+void WebGPUDriver::endRenderPass(int /* dummy */) {
    mRenderPassEncoder.End();
    mRenderPassEncoder = nullptr;
    wgpu::CommandBufferDescriptor commandBufferDescriptor {
        .label = "command_buffer",
    };
    mCommandBuffer = mCommandEncoder.Finish(&commandBufferDescriptor);
    assert_invariant(mCommandBuffer);
 }
 void WebGPUDriver::nextSubpass(int) {
@@ -803,9 +847,19 @@ void WebGPUDriver::makeCurrent(Handle<HwSwapChain> drawSch, Handle<HwSwapChain>
    wgpu::Extent2D surfaceSize = mPlatform.getSurfaceExtent(mNativeWindow);
    mTextureView = mSwapChain->getCurrentSurfaceTextureView(surfaceSize);
    assert_invariant(mTextureView);
    wgpu::CommandEncoderDescriptor commandEncoderDescriptor = {
        .label = "command_encoder"
    };
    mCommandEncoder = mDevice.CreateCommandEncoder(&commandEncoderDescriptor);
    assert_invariant(mCommandEncoder);
 }
 void WebGPUDriver::commit(Handle<HwSwapChain> sch) {
    wgpu::CommandBufferDescriptor commandBufferDescriptor{
        .label = "command_buffer",
    };
    mCommandBuffer = mCommandEncoder.Finish(&commandBufferDescriptor);
    assert_invariant(mCommandBuffer);
    mCommandEncoder = nullptr;
    mQueue.Submit(1, &mCommandBuffer);
    mCommandBuffer = nullptr;
@@ -899,7 +953,7 @@ void WebGPUDriver::bindPipeline(PipelineState const& pipelineState) {
            pipelineState.polygonOffset, pipelineState.primitiveType, mSwapChain->getColorFormat(),
            mSwapChain->getDepthFormat());
    // TODO: uncomment once we have a valid pipeline to set
-    // mRenderPassEncoder.SetPipeline(pipeline);
+    mRenderPassEncoder.SetPipeline(pipeline);
 }
 void WebGPUDriver::bindRenderPrimitive(Handle<HwRenderPrimitive> rph) {
@@ -919,10 +973,18 @@ void WebGPUDriver::bindRenderPrimitive(Handle<HwRenderPrimitive> rph) {
 }
 void WebGPUDriver::draw2(uint32_t indexOffset, uint32_t indexCount, uint32_t instanceCount) {
    // Calling DrawIndexed with "firstInstance = 0" results in a NON spinning triangle
    //    mRenderPassEncoder.DrawIndexed(indexCount, instanceCount, indexOffset, 0, 0);
    // Calling DrawIndexed with "firstInstance = 1" results in a spinning triangle
    mRenderPassEncoder.DrawIndexed(indexCount, instanceCount, indexOffset, 0, 1);
    // Calling Draw with "firstInstance = 0" results in a NON spinning triangle
    // Calling Draw with "firstInstance = 1" results in a spinning triangle
    //    mRenderPassEncoder.Draw(indexCount, instanceCount, 0, 1);
 }
-void WebGPUDriver::draw(PipelineState pipelineState, Handle<HwRenderPrimitive> rph,
+void WebGPUDriver::draw(PipelineState, Handle<HwRenderPrimitive>, uint32_t indexOffset,
-        uint32_t indexOffset, uint32_t indexCount, uint32_t instanceCount) {
+        uint32_t indexCount, uint32_t instanceCount) {
    draw2(indexOffset, indexCount, instanceCount);
 }
 void WebGPUDriver::dispatchCompute(Handle<HwProgram> program, math::uint3 workGroupCount) {
@@ -958,34 +1020,156 @@ void WebGPUDriver::updateDescriptorSetBuffer(Handle<HwDescriptorSet> dsh,
 void WebGPUDriver::updateDescriptorSetTexture(Handle<HwDescriptorSet> dsh,
        backend::descriptor_binding_t binding, Handle<HwTexture> th, SamplerParams params) {
    /*
    auto bindGroup = handleCast<WebGPUDescriptorSet>(dsh);
    auto texture = handleCast<WGPUTexture>(th);
    // TODO very high odds badd assumptions are in here about handling HwTexture. Revisit with more
    // understanding. Right now assuming there is a wgpu::TextureView filled in
    if (!bindGroup->getIsLocked()) {
        // Dawn will cache duplicate samplers, so we don't strictly need to maintain a cache.
        //  Making a cache might save us minor perf by reducing param translation
        auto sampler = makeSampler(params);
        // TODO making assumptions that size and offset mean the same thing here.
        wgpu::BindGroupEntry tEntry{ .binding = static_cast<uint32_t>(binding * 2),
-            .textureView = texture->texView };
+            .textureView = texture->getTexView() };
        bindGroup->addEntry(tEntry.binding, std::move(tEntry));
        wgpu::BindGroupEntry sEntry{ .binding = static_cast<uint32_t>(binding * 2 + 1),
-            .sampler = texture->sampler };
+            .sampler = sampler };
        bindGroup->addEntry(sEntry.binding, std::move(sEntry));
    }
    //TODO Just the setup, this function stilll needs the rest of logic implemented
     */
 }
-void WebGPUDriver::bindDescriptorSet(Handle<HwDescriptorSet> dsh, backend::descriptor_set_t set,
+void WebGPUDriver::bindDescriptorSet(Handle<HwDescriptorSet> dsh,
-        backend::DescriptorSetOffsetArray&& offsets) {
+        backend::descriptor_set_t setIndex, backend::DescriptorSetOffsetArray&& offsets) {
-    auto bindGroup = handleCast<WebGPUDescriptorSet>(dsh);
+    const auto bindGroup = handleCast<WebGPUDescriptorSet>(dsh);
-    // TODO: presume we need this, use it. Probably Encoder::SetBindGroup
+    const auto wbg = bindGroup->lockAndReturn(mDevice);
-    auto wbg = bindGroup->lockAndReturn(mDevice);
+    assert_invariant(mRenderPassEncoder);
    // TODO is this how we should be getting the dynamic offsets?
    //      should we add offsets for unused entries or is the input already have them?
    //      this implementation assumes unused entries are not provided, and adds dummy values.
    //      The count also includes unused entities, as not doing so produces errors
    const size_t dynamicOffsetCount = bindGroup->countEntitiesWithDynamicOffsets();
    uint32_t const* const dynamicOffsetsWithUnused = bindGroup->setDynamicOffsets(offsets.data());
    mRenderPassEncoder.SetBindGroup(setIndex, wbg, dynamicOffsetCount, dynamicOffsetsWithUnused);
 }
 void WebGPUDriver::setDebugTag(HandleBase::HandleId handleId, utils::CString tag) {
 }
 wgpu::Sampler WebGPUDriver::makeSampler(SamplerParams const& params) {
    wgpu::SamplerDescriptor desc;
    desc.label = "TODO";
    desc.addressModeU = fWrapModeToWAddressMode(params.wrapS);
    desc.addressModeV = fWrapModeToWAddressMode(params.wrapR);
    desc.addressModeW = fWrapModeToWAddressMode(params.wrapT);
    switch (params.filterMag) {
        case SamplerMagFilter::NEAREST: {
            desc.magFilter = wgpu::FilterMode::Nearest;
            break;
        }
        case SamplerMagFilter::LINEAR: {
            desc.magFilter = wgpu::FilterMode::Linear;
            break;
        }
    }
    switch (params.filterMin) {
        case SamplerMinFilter::NEAREST: {
            desc.minFilter = wgpu::FilterMode::Nearest;
            // Metal Driver uses an explicit not-mipmapped value webgpu lacks. Nearest should
            // suffice
            desc.mipmapFilter = wgpu::MipmapFilterMode::Nearest;
            break;
        }
        case SamplerMinFilter::LINEAR: {
            desc.minFilter = wgpu::FilterMode::Linear;
            // Metal Driver uses an explicit not-mipmapped value webgpu lacks. Nearest should
            // suffice
            desc.mipmapFilter = wgpu::MipmapFilterMode::Nearest;
            break;
        }
        case SamplerMinFilter::NEAREST_MIPMAP_NEAREST: {
            desc.minFilter = wgpu::FilterMode::Nearest;
            desc.mipmapFilter = wgpu::MipmapFilterMode::Nearest;
            break;
        }
        case SamplerMinFilter::LINEAR_MIPMAP_NEAREST: {
            desc.minFilter = wgpu::FilterMode::Linear;
            desc.mipmapFilter = wgpu::MipmapFilterMode::Nearest;
            break;
        }
        case SamplerMinFilter::NEAREST_MIPMAP_LINEAR: {
            desc.minFilter = wgpu::FilterMode::Nearest;
            desc.mipmapFilter = wgpu::MipmapFilterMode::Linear;
            break;
        }
        case SamplerMinFilter::LINEAR_MIPMAP_LINEAR: {
            desc.minFilter = wgpu::FilterMode::Linear;
            desc.mipmapFilter = wgpu::MipmapFilterMode::Linear;
            break;
        }
    }
    switch (params.compareFunc) {
        case SamplerCompareFunc::LE: {
            desc.compare = wgpu::CompareFunction::LessEqual;
            break;
        }
        case SamplerCompareFunc::GE: {
            desc.compare = wgpu::CompareFunction::GreaterEqual;
            break;
        }
        case SamplerCompareFunc::L: {
            desc.compare = wgpu::CompareFunction::Less;
            break;
        }
        case SamplerCompareFunc::G: {
            desc.compare = wgpu::CompareFunction::Greater;
            break;
        }
        case SamplerCompareFunc::E: {
            desc.compare = wgpu::CompareFunction::Equal;
            break;
        }
        case SamplerCompareFunc::NE: {
            desc.compare = wgpu::CompareFunction::NotEqual;
            break;
        }
        case SamplerCompareFunc::A: {
            desc.compare = wgpu::CompareFunction::Always;
            break;
        }
        case SamplerCompareFunc::N: {
            desc.compare = wgpu::CompareFunction::Never;
            break;
        }
    }
    desc.maxAnisotropy = 1u << params.anisotropyLog2;
    // Unused: Filament's compareMode, WGPU lodMinClamp/lodMaxClamp
    //TODO Once we can properly map to descriptorsetlayout use the sampler.
    return mDevice.CreateSampler(/*&desc*/);
 }
 wgpu::AddressMode WebGPUDriver::fWrapModeToWAddressMode(const SamplerWrapMode& fWrapMode) {
    switch (fWrapMode) {
        case SamplerWrapMode::CLAMP_TO_EDGE: {
            return wgpu::AddressMode::ClampToEdge;
            break;
        }
        case SamplerWrapMode::REPEAT: {
            return wgpu::AddressMode::Repeat;
            break;
        }
        case SamplerWrapMode::MIRRORED_REPEAT: {
            return wgpu::AddressMode::MirrorRepeat;
            break;
        }
    }
    return wgpu::AddressMode::Undefined;
 }
 } // namespace filament
@@ -56,7 +56,8 @@ private:
    explicit WebGPUDriver(WebGPUPlatform& platform, const Platform::DriverConfig& driverConfig) noexcept;
    [[nodiscard]] ShaderModel getShaderModel() const noexcept final;
    [[nodiscard]] ShaderLanguage getShaderLanguage() const noexcept final;
-
+    [[nodiscard]] wgpu::Sampler makeSampler(SamplerParams const& params);
    [[nodiscard]] static wgpu::AddressMode fWrapModeToWAddressMode(const filament::backend::SamplerWrapMode& fUsage);
    template<typename GPUBufferObject>
    void updateGPUBuffer(GPUBufferObject* gpuBufferObject, BufferDescriptor&& bufferDescriptor,
            uint32_t byteOffset) {
@@ -16,7 +16,16 @@
 #include "WebGPUHandles.h"
 #include <backend/DriverEnums.h>
 #include <utils/BitmaskEnum.h>
 #include <webgpu/webgpu_cpp.h>
 #include <algorithm>
 #include <cstdint>
 #include <utility>
 #include <vector>
 namespace {
 constexpr wgpu::BufferUsage getBufferObjectUsage(
@@ -110,6 +119,44 @@ wgpu::VertexFormat getVertexFormat(filament::backend::ElementType type, bool nor
    }
 }
 wgpu::StringView getUserTextureLabel(filament::backend::SamplerType target) {
    // TODO will be helpful to get more useful info than this
    using filament::backend::SamplerType;
    switch (target) {
        case SamplerType::SAMPLER_2D:
            return "a_2D_user_texture";
        case SamplerType::SAMPLER_2D_ARRAY:
            return "a_2D_array_user_texture";
        case SamplerType::SAMPLER_CUBEMAP:
            return "a_cube_map_user_texture";
        case SamplerType::SAMPLER_EXTERNAL:
            return "an_external_user_texture";
        case SamplerType::SAMPLER_3D:
            return "a_3D_user_texture";
        case SamplerType::SAMPLER_CUBEMAP_ARRAY:
            return "a_cube_mape_array_user_texture";
    }
 }
 wgpu::StringView getUserTextureViewLabel(filament::backend::SamplerType target) {
    // TODO will be helpful to get more useful info than this
    using filament::backend::SamplerType;
    switch (target) {
        case SamplerType::SAMPLER_2D:
            return "a_2D_user_texture_view";
        case SamplerType::SAMPLER_2D_ARRAY:
            return "a_2D_array_user_texture_view";
        case SamplerType::SAMPLER_CUBEMAP:
            return "a_cube_map_user_texture_view";
        case SamplerType::SAMPLER_EXTERNAL:
            return "an_external_user_texture_view";
        case SamplerType::SAMPLER_3D:
            return "a_3D_user_texture_view";
        case SamplerType::SAMPLER_CUBEMAP_ARRAY:
            return "a_cube_mape_array_user_texture_view";
    }
 }
 }// namespace
 namespace filament::backend {
@@ -137,7 +184,7 @@ WGPUVertexBufferInfo::WGPUVertexBufferInfo(uint8_t bufferCount, uint8_t attribut
        mAttributes[attrib.buffer].push_back({
            .format = vertexFormat,
            .offset = attrib.offset,
-            .shaderLocation = static_cast<uint32_t>(mAttributes[attrib.buffer].size()),
+            .shaderLocation = attribIndex,
        });
        mVertexBufferLayout[attrib.buffer].stepMode = wgpu::VertexStepMode::Vertex;
@@ -192,11 +239,20 @@ WebGPUDescriptorSetLayout::WebGPUDescriptorSetLayout(DescriptorSetLayout const&
        wgpu::Device const& device) {
    assert_invariant(device);
    std::string baseLabel;
    if (std::holds_alternative<utils::StaticString>(layout.label)) {
        const auto& temp = std::get_if<utils::StaticString>(&layout.label);
        baseLabel = temp->c_str();
    } else if (std::holds_alternative<utils::CString>(layout.label)) {
        const auto& temp = std::get_if<utils::CString>(&layout.label);
        baseLabel = temp->c_str();
    }
    // TODO: layoutDescriptor has a "Label". Ideally we can get info on what this layout is for
    // debugging. For now, hack an incrementing value.
    static int layoutNum = 0;
-    uint samplerCount =
+    unsigned int samplerCount =
            std::count_if(layout.bindings.begin(), layout.bindings.end(), [](auto& fEntry) {
                return fEntry.type == DescriptorType::SAMPLER ||
                       fEntry.type == DescriptorType::SAMPLER_EXTERNAL;
@@ -205,86 +261,204 @@ WebGPUDescriptorSetLayout::WebGPUDescriptorSetLayout(DescriptorSetLayout const&
    std::vector<wgpu::BindGroupLayoutEntry> wEntries;
    wEntries.reserve(layout.bindings.size() + samplerCount);
    mBindGroupEntries.reserve(wEntries.capacity());
    for (auto fEntry: layout.bindings) {
        auto& wEntry = wEntries.emplace_back();
        auto& entryInfo = mBindGroupEntries.emplace_back();
        wEntry.visibility = filamentStageToWGPUStage(fEntry.stageFlags);
        wEntry.binding = fEntry.binding * 2;
        entryInfo.binding = wEntry.binding;
        switch (fEntry.type) {
            // TODO Metal treats these the same. Is this fine?
            case DescriptorType::SAMPLER_EXTERNAL:
            case DescriptorType::SAMPLER: {
                // Sampler binding is 2n+1 due to split.
                auto& samplerEntry = wEntries.emplace_back();
                auto& samplerEntryInfo = mBindGroupEntries.emplace_back();
                samplerEntry.binding = fEntry.binding * 2 + 1;
                samplerEntryInfo.binding = samplerEntry.binding;
                samplerEntryInfo.type = WebGPUDescriptorSetLayout::BindGroupEntryType::SAMPLER;
                samplerEntry.visibility = wEntry.visibility;
                // We are simply hoping that undefined and defaults suffices here.
-                samplerEntry.sampler.type = wgpu::SamplerBindingType::Undefined;
+                samplerEntry.sampler.type = wgpu::SamplerBindingType::NonFiltering; // Example default
-                wEntry.texture.sampleType = wgpu::TextureSampleType::Undefined;
+                wEntry.texture.sampleType = wgpu::TextureSampleType::Float;      // Example default
                // TODO: FIX! THIS IS HACK FOR HELLO-TRIANGLE!
                if (baseLabel.find("Skybox") != std::string::npos ||
                        (baseLabel == "Filament Default Material_perView" && wEntry.binding == 22)) {
                    wEntry.texture.viewDimension = wgpu::TextureViewDimension::Cube;
                } else {
                    wEntry.texture.viewDimension =
                            wgpu::TextureViewDimension::e2D;// Example default
                }
                entryInfo.type = WebGPUDescriptorSetLayout::BindGroupEntryType::TEXTURE_VIEW;
                break;
            }
            case DescriptorType::UNIFORM_BUFFER: {
                wEntry.buffer.hasDynamicOffset =
                        any(fEntry.flags & DescriptorFlags::DYNAMIC_OFFSET);
                entryInfo.hasDynamicOffset = wEntry.buffer.hasDynamicOffset;
                wEntry.buffer.type = wgpu::BufferBindingType::Uniform;
                // TODO: Ideally we fill minBindingSize
                break;
            }
            case DescriptorType::INPUT_ATTACHMENT: {
                // TODO: support INPUT_ATTACHMENT. Metal does not currently.
                PANIC_POSTCONDITION("Input Attachment is not supported");
                break;
            }
            case DescriptorType::SHADER_STORAGE_BUFFER: {
                // TODO: Vulkan does not support this, can we?
                PANIC_POSTCONDITION("Shader storage is not supported");
                break;
            }
        }
-
+        // fEntry.count is unused currently
        // Currently flags are only used to specify dynamic offset.
        // UNUSED
        // fEntry.count
    }
-
+    std::string label =  "layout_" + baseLabel + std::to_string(++layoutNum) ;
    wgpu::BindGroupLayoutDescriptor layoutDescriptor{
-        // TODO: layoutDescriptor has a "Label". Ideally we can get info on what this layout is for
+        .label{label.c_str()}, // Use .c_str() if label needs to be const char*
        // debugging. For now, hack an incrementing value.
        .label{ "layout_" + std::to_string(++layoutNum) },
        .entryCount = wEntries.size(),
        .entries = wEntries.data()
    };
    // TODO Do we need to defer this until we have more info on textures and samplers??
    mLayoutSize = wEntries.size();
    mLayout = device.CreateBindGroupLayout(&layoutDescriptor);
 }
 WebGPUDescriptorSetLayout::~WebGPUDescriptorSetLayout() {}
-WebGPUDescriptorSet::WebGPUDescriptorSet(const wgpu::BindGroupLayout& layout, uint layoutSize)
+wgpu::Buffer WebGPUDescriptorSet::sDummyUniformBuffer = nullptr;
 wgpu::Texture WebGPUDescriptorSet::sDummyTexture = nullptr;
 wgpu::TextureView WebGPUDescriptorSet::sDummyTextureView = nullptr;
 wgpu::Sampler WebGPUDescriptorSet::sDummySampler = nullptr;
 void WebGPUDescriptorSet::initializeDummyResourcesIfNotAlready(wgpu::Device const& device,
        wgpu::TextureFormat aColorFormat) {
    if (!sDummyUniformBuffer) {
        wgpu::BufferDescriptor bufferDescriptor{
            .label = "dummy_uniform_not_to_be_used",
            .usage = wgpu::BufferUsage::Uniform,
            .size = 4
        };
        sDummyUniformBuffer = device.CreateBuffer(&bufferDescriptor);
        FILAMENT_CHECK_POSTCONDITION(sDummyUniformBuffer)
                << "Failed to create dummy uniform buffer?";
    }
    if (!sDummyTexture || !sDummyTextureView) {
        wgpu::TextureDescriptor textureDescriptor{
            .label = "dummy_texture_not_to_be_used",
            .usage = wgpu::TextureUsage::TextureBinding,
            .dimension = wgpu::TextureDimension::e2D,
            .size = wgpu::Extent3D{ .width = 4, .height = 4, .depthOrArrayLayers = 1 },
            .format = aColorFormat,
        };
        if (!sDummyTexture) {
            sDummyTexture = device.CreateTexture(&textureDescriptor);
            FILAMENT_CHECK_POSTCONDITION(sDummyUniformBuffer) << "Failed to create dummy texture?";
        }
        if (!sDummyTextureView) {
            wgpu::TextureViewDescriptor textureViewDescriptor{
                .label = "dummy_texture_view_not_to_be_used"
            };
            sDummyTextureView = sDummyTexture.CreateView(&textureViewDescriptor);
            FILAMENT_CHECK_POSTCONDITION(sDummyUniformBuffer)
                    << "Failed to create dummy texture view?";
        }
    }
    if (!sDummySampler) {
        wgpu::SamplerDescriptor samplerDescriptor{
            .label = "dummy_sampler_not_to_be_used"
        };
        sDummySampler = device.CreateSampler(&samplerDescriptor);
        FILAMENT_CHECK_POSTCONDITION(sDummyUniformBuffer) << "Failed to create dummy sampler?";
    }
 }
 std::vector<wgpu::BindGroupEntry> WebGPUDescriptorSet::createDummyEntriesSortedByBinding(
        std::vector<filament::backend::WebGPUDescriptorSetLayout::BindGroupEntryInfo> const&
                bindGroupEntries) {
    assert_invariant(WebGPUDescriptorSet::sDummyUniformBuffer &&
                     "Dummy uniform buffer must have been created before "
                     "creating dummy bind group entries.");
    assert_invariant(
            WebGPUDescriptorSet::sDummyTexture &&
            "Dummy texture must have been created before creating dummy bind group entries.");
    assert_invariant(
            WebGPUDescriptorSet::sDummyTextureView &&
            "Dummy texture view must have been created before creating dummy bind group entries.");
    assert_invariant(
            WebGPUDescriptorSet::sDummySampler &&
            "Dummy sampler must have been created before creating dummy bind group entries.");
    using filament::backend::WebGPUDescriptorSetLayout;
    std::vector<wgpu::BindGroupEntry> entries;
    entries.reserve(bindGroupEntries.size());
    for (auto const& entryInfo: bindGroupEntries) {
        auto& entry = entries.emplace_back();
        entry.binding = entryInfo.binding;
        switch (entryInfo.type) {
            case WebGPUDescriptorSetLayout::BindGroupEntryType::UNIFORM_BUFFER:
                entry.buffer = WebGPUDescriptorSet::sDummyUniformBuffer;
                break;
            case WebGPUDescriptorSetLayout::BindGroupEntryType::TEXTURE_VIEW:
                entry.textureView = WebGPUDescriptorSet::sDummyTextureView;
                break;
            case WebGPUDescriptorSetLayout::BindGroupEntryType::SAMPLER:
                entry.sampler = WebGPUDescriptorSet::sDummySampler;
                break;
        }
    }
    std::sort(entries.begin(), entries.end(),
            [](wgpu::BindGroupEntry const& a, wgpu::BindGroupEntry const& b) {
                return a.binding < b.binding;
            });
    return entries;
 }
 WebGPUDescriptorSet::WebGPUDescriptorSet(wgpu::BindGroupLayout const& layout,
        std::vector<WebGPUDescriptorSetLayout::BindGroupEntryInfo> const& bindGroupEntries)
    : mLayout(layout),
-      entries(layoutSize, wgpu::BindGroupEntry{}) {
+      mEntriesSortedByBinding(createDummyEntriesSortedByBinding(bindGroupEntries)) {
    // Establish the size of entries based on the layout. This should be reliable and efficient.
    assert_invariant(INVALID_INDEX > mEntryIndexByBinding.size());
    for (size_t i = 0; i < mEntryIndexByBinding.size(); i++) {
        mEntryIndexByBinding[i] = INVALID_INDEX;
    }
    for (size_t index = 0; index < mEntriesSortedByBinding.size(); index++) {
        wgpu::BindGroupEntry const& entry = mEntriesSortedByBinding[index];
        assert_invariant(entry.binding < mEntryIndexByBinding.size());
        mEntryIndexByBinding[entry.binding] = static_cast<uint8_t>(index);
    }
    for (auto const& entry : bindGroupEntries) {
        if (entry.hasDynamicOffset) {
            assert_invariant(entry.binding < mEntriesByBindingWithDynamicOffsets.size());
            mEntriesByBindingWithDynamicOffsets[entry.binding] = true;
        }
    }
    mDynamicOffsets.reserve(mEntriesSortedByBinding.size());
 }
 WebGPUDescriptorSet::~WebGPUDescriptorSet() {
    mBindGroup = nullptr;
    mLayout = nullptr;
 }
 WebGPUDescriptorSet::~WebGPUDescriptorSet() {}
 wgpu::BindGroup WebGPUDescriptorSet::lockAndReturn(const wgpu::Device& device) {
    if (mBindGroup) {
        return mBindGroup;
    }
    // TODO label? Should we just copy layout label?
-    wgpu::BindGroupDescriptor desc{ .layout = mLayout,
+    wgpu::BindGroupDescriptor desc{
-        .entryCount = entries.size(),
+        .layout = mLayout,
-        .entries = entries.data() };
+        .entryCount = mEntriesSortedByBinding.size(),
        .entries = mEntriesSortedByBinding.data()
    };
    mBindGroup = device.CreateBindGroup(&desc);
    FILAMENT_CHECK_POSTCONDITION(mBindGroup) << "Failed to create bind group?";
    // once we have created the bind group itself we should no longer need any other state
    mLayout = nullptr;
    mEntriesSortedByBinding.clear();
    mEntriesSortedByBinding.shrink_to_fit();
    return mBindGroup;
 }
-void WebGPUDescriptorSet::addEntry(uint index, wgpu::BindGroupEntry&& entry) {
+void WebGPUDescriptorSet::addEntry(unsigned int index, wgpu::BindGroupEntry&& entry) {
    if (mBindGroup) {
        // We will keep getting hits from future updates, but shouldn't do anything
        // Filament guarantees this won't change after things have locked.
@@ -292,6 +466,490 @@ void WebGPUDescriptorSet::addEntry(uint index, wgpu::BindGroupEntry&& entry) {
    }
    // TODO: Putting some level of trust that Filament is not going to reuse indexes or go past the
    // layout index for efficiency. Add guards if wrong.
-    entries[index] = std::move(entry);
+    FILAMENT_CHECK_POSTCONDITION(index < mEntryIndexByBinding.size())
            << "impossible/invalid index for a descriptor/binding (our of range or >= "
               "MAX_DESCRIPTOR_COUNT) "
            << index;
    uint8_t entryIndex = mEntryIndexByBinding[index];
    FILAMENT_CHECK_POSTCONDITION(
            entryIndex != INVALID_INDEX && entryIndex < mEntriesSortedByBinding.size())
            << "Invalid binding " << index;
    entry.binding = index;
    mEntriesSortedByBinding[entryIndex] = std::move(entry);
    mEntriesByBindingAdded[index] = true;
 }
 uint32_t const* WebGPUDescriptorSet::setDynamicOffsets(uint32_t const* offsets) {
    // mDynamicOffsets already reserves enough memory for the number of entries in the set
    mDynamicOffsets.clear();
    // this implementation copies the offsets to mDynamicOffsets, but also adds values for
    // unused entries TODO: is this necessary?
    size_t inputIndex = 0;
    size_t outputIndex = 0;
    for (auto const& entry : mEntriesSortedByBinding) {
        if (mEntriesByBindingWithDynamicOffsets[entry.binding]) {
            if (mEntriesByBindingAdded[entry.binding]) {
                mDynamicOffsets[outputIndex++] = offsets[inputIndex++];
            } else {
                mDynamicOffsets[outputIndex++] = 0; // dummy offset, as it was never added
            }
        }
    }
    return mDynamicOffsets.data();
 }
 size_t WebGPUDescriptorSet::countEntitiesWithDynamicOffsets() const {
    return mEntriesByBindingWithDynamicOffsets.count();
 }
 // From createTextureR
 WGPUTexture::WGPUTexture(SamplerType target, uint8_t levels, TextureFormat format, uint8_t samples,
        uint32_t width, uint32_t height, uint32_t depth, TextureUsage usage,
        wgpu::Device const& device) noexcept {
    assert_invariant(
            samples == 1 ||
            samples == 4 &&
                    "An invalid number of samples were requested, as WGPU requires the sample "
                    "count to either be 1 (no multisampling) or 4, at least as of April 2025 of "
                    "the spec. See https://www.w3.org/TR/webgpu/#texture-creation or "
                    "https://gpuweb.github.io/gpuweb/#multisample-state");
    // First, the texture aspect, starting with the defaults/basic configuration
    mUsage = fToWGPUTextureUsage(usage);
    mFormat = fToWGPUTextureFormat(format);
    wgpu::TextureDescriptor textureDescriptor{
        .label = getUserTextureLabel(target),
        .usage = mUsage,
        .dimension = target == SamplerType::SAMPLER_3D ? wgpu::TextureDimension::e3D
                                                       : wgpu::TextureDimension::e2D,
        .size = { .width = width, .height = height, .depthOrArrayLayers = depth },
        .format = mFormat,
        .mipLevelCount = levels,
        .sampleCount = samples,
        // TODO Is this fine? Could do all-the-things, a naive mapping or get something from
        // Filament
        .viewFormatCount = 0,
        .viewFormats = nullptr,
    };
    // adjust for specific cases
    switch (target) {
        case SamplerType::SAMPLER_2D:
            mArrayLayerCount = 1;
            break;
        case SamplerType::SAMPLER_2D_ARRAY:
            mArrayLayerCount = textureDescriptor.size.depthOrArrayLayers;
            break;
        case SamplerType::SAMPLER_CUBEMAP:
            textureDescriptor.size.depthOrArrayLayers = 6;
            mArrayLayerCount = textureDescriptor.size.depthOrArrayLayers;
            break;
        case SamplerType::SAMPLER_EXTERNAL:
        case SamplerType::SAMPLER_3D:
            mArrayLayerCount = 1;
            break;
        case SamplerType::SAMPLER_CUBEMAP_ARRAY:
            textureDescriptor.size.depthOrArrayLayers = depth * 6;
            mArrayLayerCount = textureDescriptor.size.depthOrArrayLayers;
            break;
    }
    assert_invariant(textureDescriptor.format != wgpu::TextureFormat::Undefined &&
                     "Could not find appropriate WebGPU format");
    mTexture = device.CreateTexture(&textureDescriptor);
    FILAMENT_CHECK_POSTCONDITION(mTexture)
            << "Failed to create texture for " << textureDescriptor.label;
    // Second, the texture view aspect
    mTexView = makeTextureView(0, levels, target);
 }
 // From createTextureViewR
 WGPUTexture::WGPUTexture(WGPUTexture* src, uint8_t baseLevel, uint8_t levelCount) noexcept {
    mTexture = src->mTexture;
    mTexView = makeTextureView(baseLevel, levelCount, target);
 }
 wgpu::TextureUsage WGPUTexture::fToWGPUTextureUsage(const TextureUsage& fUsage) {
    wgpu::TextureUsage retUsage = wgpu::TextureUsage::None;
    // Basing this mapping off of VulkanTexture.cpp's getUsage func and suggestions from Gemini
    // TODO Validate assumptions, revisit if issues.
    if (any(TextureUsage::BLIT_SRC & fUsage)) {
        retUsage |= wgpu::TextureUsage::CopySrc;
    }
    if (any((TextureUsage::BLIT_DST | TextureUsage::UPLOADABLE) & fUsage)) {
        retUsage |= wgpu::TextureUsage::CopyDst;
    }
    if (any(TextureUsage::SAMPLEABLE & fUsage)) {
        retUsage |= wgpu::TextureUsage::TextureBinding;
    }
    // WGPU Render attachment covers either color or stencil situation dependant
    // NOTE: Depth attachment isn't used this way in Vulkan but logically maps to WGPU docs. If
    // issues, investigate here.
    if (any((TextureUsage::COLOR_ATTACHMENT | TextureUsage::STENCIL_ATTACHMENT |
                    TextureUsage::DEPTH_ATTACHMENT) &
                fUsage)) {
        retUsage |= wgpu::TextureUsage::RenderAttachment;
    }
    // This is from Vulkan logic- if there are any issues try disabling this first, allows perf
    // benefit though
    const bool useTransientAttachment =
            // Usage consists of attachment flags only.
            none(fUsage & ~TextureUsage::ALL_ATTACHMENTS) &&
            // Usage contains at least one attachment flag.
            any(fUsage & TextureUsage::ALL_ATTACHMENTS) &&
            // Depth resolve cannot use transient attachment because it uses a custom shader.
            // TODO: see VulkanDriver::isDepthStencilResolveSupported() to know when to remove this
            // restriction.
            // Note that the custom shader does not resolve stencil. We do need to move to vk 1.2
            // and above to be able to support stencil resolve (along with depth).
            !(any(fUsage & TextureUsage::DEPTH_ATTACHMENT) && samples > 1);
    if (useTransientAttachment) {
        retUsage |= wgpu::TextureUsage::TransientAttachment;
    }
    // NOTE: Unused wgpu flags:
    //  StorageBinding
    //  StorageAttachment
    // NOTE: Unused Filament flags:
    //  SUBPASS_INPUT VK goes to input attachment which we don't support right now
    //  PROTECTED
    return retUsage;
 }
 wgpu::TextureFormat WGPUTexture::fToWGPUTextureFormat(const TextureFormat& fUsage) {
    switch (fUsage) {
        case filament::backend::TextureFormat::R8:
            return wgpu::TextureFormat::R8Unorm;
        case filament::backend::TextureFormat::R8_SNORM:
            return wgpu::TextureFormat::R8Snorm;
        case filament::backend::TextureFormat::R8UI:
            return wgpu::TextureFormat::R8Uint;
        case filament::backend::TextureFormat::R8I:
            return wgpu::TextureFormat::R8Sint;
        case filament::backend::TextureFormat::STENCIL8:
            return wgpu::TextureFormat::Stencil8;
        case filament::backend::TextureFormat::R16F:
            return wgpu::TextureFormat::R16Float;
        case filament::backend::TextureFormat::R16UI:
            return wgpu::TextureFormat::R16Uint;
        case filament::backend::TextureFormat::R16I:
            return wgpu::TextureFormat::R16Sint;
        case filament::backend::TextureFormat::RG8:
            return wgpu::TextureFormat::RG8Unorm;
        case filament::backend::TextureFormat::RG8_SNORM:
            return wgpu::TextureFormat::RG8Snorm;
        case filament::backend::TextureFormat::RG8UI:
            return wgpu::TextureFormat::RG8Uint;
        case filament::backend::TextureFormat::RG8I:
            return wgpu::TextureFormat::RG8Sint;
        case filament::backend::TextureFormat::R32F:
            return wgpu::TextureFormat::R32Float;
        case filament::backend::TextureFormat::R32UI:
            return wgpu::TextureFormat::R32Uint;
        case filament::backend::TextureFormat::R32I:
            return wgpu::TextureFormat::R32Sint;
        case filament::backend::TextureFormat::RG16F:
            return wgpu::TextureFormat::RG16Float;
        case filament::backend::TextureFormat::RG16UI:
            return wgpu::TextureFormat::RG16Uint;
        case filament::backend::TextureFormat::RG16I:
            return wgpu::TextureFormat::RG16Sint;
        case filament::backend::TextureFormat::RGBA8:
            return wgpu::TextureFormat::RGBA8Unorm;
        case filament::backend::TextureFormat::SRGB8_A8:
            return wgpu::TextureFormat::RGBA8UnormSrgb;
        case filament::backend::TextureFormat::RGBA8_SNORM:
            return wgpu::TextureFormat::RGBA8Snorm;
        case filament::backend::TextureFormat::RGBA8UI:
            return wgpu::TextureFormat::RGBA8Uint;
        case filament::backend::TextureFormat::RGBA8I:
            return wgpu::TextureFormat::RGBA8Sint;
        case filament::backend::TextureFormat::DEPTH16:
            return wgpu::TextureFormat::Depth16Unorm;
        case filament::backend::TextureFormat::DEPTH24:
            return wgpu::TextureFormat::Depth24Plus;
        case filament::backend::TextureFormat::DEPTH32F:
            return wgpu::TextureFormat::Depth32Float;
        case filament::backend::TextureFormat::DEPTH24_STENCIL8:
            return wgpu::TextureFormat::Depth24PlusStencil8;
        case filament::backend::TextureFormat::DEPTH32F_STENCIL8:
            return wgpu::TextureFormat::Depth32FloatStencil8;
        case filament::backend::TextureFormat::RG32F:
            return wgpu::TextureFormat::RG32Float;
        case filament::backend::TextureFormat::RG32UI:
            return wgpu::TextureFormat::RG32Uint;
        case filament::backend::TextureFormat::RG32I:
            return wgpu::TextureFormat::RG32Sint;
        case filament::backend::TextureFormat::RGBA16F:
            return wgpu::TextureFormat::RGBA16Float;
        case filament::backend::TextureFormat::RGBA16UI:
            return wgpu::TextureFormat::RGBA16Uint;
        case filament::backend::TextureFormat::RGBA16I:
            return wgpu::TextureFormat::RGBA16Sint;
        case filament::backend::TextureFormat::RGBA32F:
            return wgpu::TextureFormat::RGBA32Float;
        case filament::backend::TextureFormat::RGBA32UI:
            return wgpu::TextureFormat::RGBA32Uint;
        case filament::backend::TextureFormat::RGBA32I:
            return wgpu::TextureFormat::RGBA32Sint;
        case filament::backend::TextureFormat::EAC_R11:
            return wgpu::TextureFormat::EACR11Unorm;
        case filament::backend::TextureFormat::EAC_R11_SIGNED:
            return wgpu::TextureFormat::EACR11Snorm;
        case filament::backend::TextureFormat::EAC_RG11:
            return wgpu::TextureFormat::EACRG11Unorm;
        case filament::backend::TextureFormat::EAC_RG11_SIGNED:
            return wgpu::TextureFormat::EACRG11Snorm;
        case filament::backend::TextureFormat::ETC2_RGB8:
            return wgpu::TextureFormat::ETC2RGB8Unorm;
        case filament::backend::TextureFormat::ETC2_SRGB8:
            return wgpu::TextureFormat::ETC2RGB8UnormSrgb;
        case filament::backend::TextureFormat::ETC2_RGB8_A1:
            return wgpu::TextureFormat::ETC2RGB8A1Unorm;
        case filament::backend::TextureFormat::ETC2_SRGB8_A1:
            return wgpu::TextureFormat::ETC2RGB8A1UnormSrgb;
        case filament::backend::TextureFormat::ETC2_EAC_RGBA8:
            return wgpu::TextureFormat::ETC2RGBA8Unorm;
        case filament::backend::TextureFormat::ETC2_EAC_SRGBA8:
            return wgpu::TextureFormat::ETC2RGBA8UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_4x4:
            return wgpu::TextureFormat::ASTC4x4Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_4x4:
            return wgpu::TextureFormat::ASTC4x4UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_5x4:
            return wgpu::TextureFormat::ASTC5x4Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_5x4:
            return wgpu::TextureFormat::ASTC5x4UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_5x5:
            return wgpu::TextureFormat::ASTC5x5Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_5x5:
            return wgpu::TextureFormat::ASTC5x5UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_6x5:
            return wgpu::TextureFormat::ASTC6x5Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_6x5:
            return wgpu::TextureFormat::ASTC6x5UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_6x6:
            return wgpu::TextureFormat::ASTC6x6Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_6x6:
            return wgpu::TextureFormat::ASTC6x6UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_8x5:
            return wgpu::TextureFormat::ASTC8x5Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_8x5:
            return wgpu::TextureFormat::ASTC8x5UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_8x6:
            return wgpu::TextureFormat::ASTC8x6Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_8x6:
            return wgpu::TextureFormat::ASTC8x6UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_8x8:
            return wgpu::TextureFormat::ASTC8x8Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_8x8:
            return wgpu::TextureFormat::ASTC8x8UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_10x5:
            return wgpu::TextureFormat::ASTC10x5Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_10x5:
            return wgpu::TextureFormat::ASTC10x5UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_10x6:
            return wgpu::TextureFormat::ASTC10x6Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_10x6:
            return wgpu::TextureFormat::ASTC10x6UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_10x8:
            return wgpu::TextureFormat::ASTC10x8Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_10x8:
            return wgpu::TextureFormat::ASTC10x8UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_10x10:
            return wgpu::TextureFormat::ASTC10x10Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_10x10:
            return wgpu::TextureFormat::ASTC10x10UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_12x10:
            return wgpu::TextureFormat::ASTC12x10Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_12x10:
            return wgpu::TextureFormat::ASTC12x10UnormSrgb;
        case filament::backend::TextureFormat::RGBA_ASTC_12x12:
            return wgpu::TextureFormat::ASTC12x12Unorm;
        case filament::backend::TextureFormat::SRGB8_ALPHA8_ASTC_12x12:
            return wgpu::TextureFormat::ASTC12x12UnormSrgb;
        case filament::backend::TextureFormat::RED_RGTC1:
            return wgpu::TextureFormat::BC4RUnorm;
        case filament::backend::TextureFormat::SIGNED_RED_RGTC1:
            return wgpu::TextureFormat::BC4RSnorm;
        case filament::backend::TextureFormat::RED_GREEN_RGTC2:
            return wgpu::TextureFormat::BC5RGUnorm;
        case filament::backend::TextureFormat::SIGNED_RED_GREEN_RGTC2:
            return wgpu::TextureFormat::BC5RGSnorm;
        case filament::backend::TextureFormat::RGB_BPTC_UNSIGNED_FLOAT:
            return wgpu::TextureFormat::BC6HRGBUfloat;
        case filament::backend::TextureFormat::RGB_BPTC_SIGNED_FLOAT:
            return wgpu::TextureFormat::BC6HRGBFloat;
        case filament::backend::TextureFormat::RGBA_BPTC_UNORM:
            return wgpu::TextureFormat::BC7RGBAUnorm;
        case filament::backend::TextureFormat::SRGB_ALPHA_BPTC_UNORM:
            return wgpu::TextureFormat::BC7RGBAUnormSrgb;
        case filament::backend::TextureFormat::RGB565:
            // No direct mapping in wgpu. Could potentially map to RGBA8Unorm
            // and discard the alpha and lower precision.
            return wgpu::TextureFormat::Undefined;
        case filament::backend::TextureFormat::RGB9_E5:
            return wgpu::TextureFormat::RGB9E5Ufloat;
        case filament::backend::TextureFormat::RGB5_A1:
            // No direct mapping in wgpu. Could potentially map to RGBA8Unorm
            // and handle the packing/unpacking in shaders.
            return wgpu::TextureFormat::Undefined;
        case filament::backend::TextureFormat::RGBA4:
            // No direct mapping in wgpu. Could potentially map to RGBA8Unorm
            // and handle the packing/unpacking in shaders.
            return wgpu::TextureFormat::Undefined;
        case filament::backend::TextureFormat::RGB8:
            // No direct sRGB equivalent in wgpu without alpha.
            return wgpu::TextureFormat::RGBA8Unorm;
        case filament::backend::TextureFormat::SRGB8:
            // No direct sRGB equivalent in wgpu without alpha.
            return wgpu::TextureFormat::RGBA8UnormSrgb;
        case filament::backend::TextureFormat::RGB8_SNORM:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA8Snorm;
        case filament::backend::TextureFormat::RGB8UI:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA8Uint;
        case filament::backend::TextureFormat::RGB8I:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA8Sint;
        case filament::backend::TextureFormat::R11F_G11F_B10F:
            return wgpu::TextureFormat::RG11B10Ufloat;
        case filament::backend::TextureFormat::UNUSED:
            return wgpu::TextureFormat::Undefined;
        case filament::backend::TextureFormat::RGB10_A2:
            return wgpu::TextureFormat::RGB10A2Unorm;
        case filament::backend::TextureFormat::RGB16F:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA16Float;
        case filament::backend::TextureFormat::RGB16UI:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA16Uint;
        case filament::backend::TextureFormat::RGB16I:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA16Sint;
        case filament::backend::TextureFormat::RGB32F:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA32Float;
        case filament::backend::TextureFormat::RGB32UI:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA32Uint;
        case filament::backend::TextureFormat::RGB32I:
            // No direct mapping in wgpu without alpha.
            return wgpu::TextureFormat::RGBA32Sint;
        case filament::backend::TextureFormat::DXT1_RGB:
            return wgpu::TextureFormat::BC1RGBAUnorm;
        case filament::backend::TextureFormat::DXT1_RGBA:
            return wgpu::TextureFormat::BC1RGBAUnorm;
        case filament::backend::TextureFormat::DXT3_RGBA:
            return wgpu::TextureFormat::BC2RGBAUnorm;
        case filament::backend::TextureFormat::DXT5_RGBA:
            return wgpu::TextureFormat::BC3RGBAUnorm;
        case filament::backend::TextureFormat::DXT1_SRGB:
            return wgpu::TextureFormat::BC1RGBAUnormSrgb;
        case filament::backend::TextureFormat::DXT1_SRGBA:
            return wgpu::TextureFormat::BC1RGBAUnormSrgb;
        case filament::backend::TextureFormat::DXT3_SRGBA:
            return wgpu::TextureFormat::BC2RGBAUnormSrgb;
        case filament::backend::TextureFormat::DXT5_SRGBA:
            return wgpu::TextureFormat::BC3RGBAUnormSrgb;
    }
 }
 wgpu::TextureView WGPUTexture::makeTextureView(const uint8_t& baseLevel, const uint8_t& levelCount,
        SamplerType target) {
    // starting with the defaults/basic configuration
    wgpu::TextureViewDescriptor textureViewDescriptor{
        .label = getUserTextureViewLabel(target),
        .format = mFormat,
        // dimension depends on target and is set below
        .baseMipLevel = baseLevel,
        .mipLevelCount = levelCount,
        // baseArrayLayer is required, making a guess
        .baseArrayLayer = 0,
        .arrayLayerCount = mArrayLayerCount,
        // Have not found an analog to aspect in other drivers, but ALL should be unrestrictive.
        // TODO Can we make this better?
        .aspect = wgpu::TextureAspect::All,
        .usage = mUsage
    };
    // adjust for specific cases
    switch (target) {
        case SamplerType::SAMPLER_2D:
            textureViewDescriptor.dimension = wgpu::TextureViewDimension::e2D;
            break;
        case SamplerType::SAMPLER_2D_ARRAY:
            textureViewDescriptor.dimension = wgpu::TextureViewDimension::e2DArray;
            break;
        case SamplerType::SAMPLER_CUBEMAP:
            textureViewDescriptor.dimension = wgpu::TextureViewDimension::Cube;
            break;
        case SamplerType::SAMPLER_EXTERNAL:
            textureViewDescriptor.dimension = wgpu::TextureViewDimension::e2D;
            break;
        case SamplerType::SAMPLER_3D:
            textureViewDescriptor.dimension = wgpu::TextureViewDimension::e3D;
            break;
        case SamplerType::SAMPLER_CUBEMAP_ARRAY:
            textureViewDescriptor.dimension = wgpu::TextureViewDimension::CubeArray;
            break;
    }
    wgpu::TextureView textureView = mTexture.CreateView(&textureViewDescriptor);
    FILAMENT_CHECK_POSTCONDITION(textureView)
            << "Failed to create texture view " << textureViewDescriptor.label;
    return textureView;
 }
 WGPURenderTarget::Attachment WGPURenderTarget::getDrawColorAttachment(size_t index) {
    assert_invariant( index < MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT);
    auto result = color[index];
    if (index == 0 && defaultRenderTarget) {
    }
    return result;
 }
 wgpu::LoadOp WGPURenderTarget::getLoadOperation(RenderPassParams const& params,
                                             TargetBufferFlags buffer) {
    auto clearFlags = params.flags.clear;
    auto discardStartFlags = params.flags.discardStart;
    if (any(clearFlags & buffer)) {
        return wgpu::LoadOp::Clear;
    } else if (any(discardStartFlags & buffer)) {
        return wgpu::LoadOp::Clear;
    }
    return wgpu::LoadOp::Load;
 }
 wgpu::StoreOp WGPURenderTarget::getStoreOperation(RenderPassParams const& params,
                                               TargetBufferFlags buffer) {
    const auto discardEndFlags = params.flags.discardEnd;
    if (any(discardEndFlags & buffer)) {
        return wgpu::StoreOp::Discard;
    }
    return wgpu::StoreOp::Store;
 }
 void WGPURenderTarget::setUpRenderPassAttachments(wgpu::RenderPassDescriptor& descriptor,
        wgpu::TextureView const& textureView, RenderPassParams const& params) {
    // auto discardFlags = params.flags.discardEnd;
    // (void) discardFlags;
    // std::vector<wgpu::RenderPassColorAttachment> colorAttachments;
    colorAttachments.clear();
    for (size_t i = 0; i < 1/*MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT*/; i++) {
        // auto attachment = getDrawColorAttachment(i);
        // if (attachment) {
            wgpu::RenderPassColorAttachment colorAttachment;
            colorAttachment.view = textureView;
            colorAttachment.loadOp  = getLoadOperation(params, getTargetBufferFlagsAt(i));
            colorAttachment.storeOp = getStoreOperation(params, getTargetBufferFlagsAt(i));
            colorAttachment.clearValue = { params.clearColor.r, params.clearColor.g, params.clearColor.b, params.clearColor.a };
            colorAttachments.emplace_back(colorAttachment);
        // }
    }
    descriptor.colorAttachments = colorAttachments.data();
    descriptor.colorAttachmentCount = colorAttachments.size();
    descriptor.depthStencilAttachment = nullptr;
    descriptor.timestampWrites = nullptr;
 }
 }// namespace filament::backend
@@ -27,6 +27,8 @@
 #include <webgpu/webgpu_cpp.h>
 #include <array>
 #include <bitset>
 #include <cstdint>
 #include <vector>
@@ -98,80 +100,124 @@ struct WGPUBufferObject : HwBufferObject {
    wgpu::Buffer buffer = nullptr;
    const BufferObjectBinding bufferObjectBinding;
 };
 class WebGPUDescriptorSetLayout final : public HwDescriptorSetLayout {
 public:
    enum class BindGroupEntryType : uint8_t {
        UNIFORM_BUFFER,
        TEXTURE_VIEW,
        SAMPLER
    };
    struct BindGroupEntryInfo final {
        uint8_t binding = 0;
        BindGroupEntryType type = BindGroupEntryType::UNIFORM_BUFFER;
        bool hasDynamicOffset = false;
    };
    WebGPUDescriptorSetLayout(DescriptorSetLayout const& layout, wgpu::Device const& device);
    ~WebGPUDescriptorSetLayout();
    [[nodiscard]] const wgpu::BindGroupLayout& getLayout() const { return mLayout; }
-    [[nodiscard]] uint getLayoutSize() const { return mLayoutSize; }
+    [[nodiscard]] std::vector<BindGroupEntryInfo> const& getBindGroupEntries() const {
        return mBindGroupEntries;
    }
 private:
    // TODO: If this is useful elsewhere, remove it from this class
    // Convert Filament Shader Stage Flags bitmask to webgpu equivilant
    static wgpu::ShaderStage filamentStageToWGPUStage(ShaderStageFlags fFlags);
-    uint mLayoutSize;
+    std::vector<BindGroupEntryInfo> mBindGroupEntries;
    wgpu::BindGroupLayout mLayout;
 };
 class WebGPUDescriptorSet final : public HwDescriptorSet {
 public:
-    WebGPUDescriptorSet(const wgpu::BindGroupLayout& layout, uint layoutSize);
+    static void initializeDummyResourcesIfNotAlready(wgpu::Device const&,
            wgpu::TextureFormat aColorFormat);
    WebGPUDescriptorSet(wgpu::BindGroupLayout const& layout,
            std::vector<WebGPUDescriptorSetLayout::BindGroupEntryInfo> const& bindGroupEntries);
    ~WebGPUDescriptorSet();
-    wgpu::BindGroup lockAndReturn(wgpu::Device const& device);
+    wgpu::BindGroup lockAndReturn(wgpu::Device const&);
-    void addEntry(uint index, wgpu::BindGroupEntry&& entry);
+    void addEntry(unsigned int index, wgpu::BindGroupEntry&& entry);
    [[nodiscard]] uint32_t const* setDynamicOffsets(uint32_t const* offsets);
    [[nodiscard]] bool getIsLocked() const { return mBindGroup != nullptr; }
-
+    [[nodiscard]] size_t countEntitiesWithDynamicOffsets() const;
 private:
    static wgpu::Buffer sDummyUniformBuffer;
    static wgpu::Texture sDummyTexture;
    static wgpu::TextureView sDummyTextureView;
    static wgpu::Sampler sDummySampler;
    static std::vector<wgpu::BindGroupEntry> createDummyEntriesSortedByBinding(
            std::vector<filament::backend::WebGPUDescriptorSetLayout::BindGroupEntryInfo> const&);
    // TODO: Consider storing what we used to make the layout. However we need to essentially
    // Recreate some of the info (Sampler in slot X with the actual sampler) so letting Dawn confirm
    // there isn't a mismatch may be easiest.
    // Also storing the wgpu ObjectBase takes care of ownership challenges in theory
-    wgpu::BindGroupLayout mLayout;
+    wgpu::BindGroupLayout mLayout = nullptr;
-    std::vector<wgpu::BindGroupEntry> entries;
+    static constexpr uint8_t INVALID_INDEX = MAX_DESCRIPTOR_COUNT + 1;
-    wgpu::BindGroup mBindGroup;
+    std::array<uint8_t, MAX_DESCRIPTOR_COUNT> mEntryIndexByBinding {};
    std::vector<wgpu::BindGroupEntry> mEntriesSortedByBinding;
    std::bitset<MAX_DESCRIPTOR_COUNT> mEntriesByBindingWithDynamicOffsets {};
    std::bitset<MAX_DESCRIPTOR_COUNT> mEntriesByBindingAdded {};
    std::vector<uint32_t> mDynamicOffsets;
    wgpu::BindGroup mBindGroup = nullptr;
 };
-// TODO: Currently WGPUTexture is not used by WebGPU for useful task.
+class WGPUTexture : public HwTexture {
-// Update the struct when used by WebGPU driver.
+public:
 struct WGPUTexture : public HwTexture {
    WGPUTexture(SamplerType target, uint8_t levels, TextureFormat format, uint8_t samples,
-            uint32_t width, uint32_t height, uint32_t depth, TextureUsage usage) noexcept;
+            uint32_t width, uint32_t height, uint32_t depth, TextureUsage usage,
            wgpu::Device const& device) noexcept;
-    // constructors for creating texture views
+    WGPUTexture(WGPUTexture* src, uint8_t baseLevel, uint8_t levelCount) noexcept;
    WGPUTexture(WGPUTexture const* src, uint8_t baseLevel, uint8_t levelCount) noexcept;
-    wgpu::Texture texture = nullptr;
+    const wgpu::Texture& getTexture() const { return mTexture; }
-    // TODO: Adding this but not yet setting it up. Filament "Textures" are combined image samplers,
+    const wgpu::TextureView& getTexView() const { return mTexView; }
-    // rep both.
+
-    wgpu::Sampler sampler = nullptr;
+    // Public to allow checking for support of a texture format
-    //TODO: Not sure all the ways HwTexture is used. Overloading like this might be entirely wrong.
+    static wgpu::TextureFormat fToWGPUTextureFormat(const filament::backend::TextureFormat& fUsage);
-    wgpu::TextureView texView = nullptr;
+
 private:
    wgpu::TextureView makeTextureView(const uint8_t& baseLevel, const uint8_t& levelCount,
            SamplerType target);
    // CreateTextureR has info for a texture and sampler. Texture Views are needed for binding,
    // along with a sampler Current plan: Inherit the sampler and Texture to always exist (It is a
    // ref counted pointer) when making views. View is optional
    wgpu::Texture mTexture = nullptr;
    wgpu::TextureUsage mUsage = wgpu::TextureUsage::None;
    wgpu::TextureFormat mFormat = wgpu::TextureFormat::Undefined;
    uint32_t mArrayLayerCount = 1;
    wgpu::TextureView mTexView = nullptr;
    wgpu::TextureUsage fToWGPUTextureUsage(const filament::backend::TextureUsage& fUsage);
 };
 struct WGPURenderPrimitive : public HwRenderPrimitive {
    WGPURenderPrimitive() {}
    void setBuffers(WGPUVertexBufferInfo const* const vbi,
            WGPUVertexBuffer* vertexBuffer, WGPUIndexBuffer* indexBuffer);
    WGPUVertexBuffer* vertexBuffer = nullptr;
    WGPUIndexBuffer* indexBuffer = nullptr;
 };
-// TODO: Currently WGPURenderTarget is not used by WebGPU for useful task.
+class WGPURenderTarget : public HwRenderTarget {
-// Update the struct when used by WebGPU driver.
+public:
 struct WGPURenderTarget : public HwRenderTarget {
    class Attachment {
    public:
-        friend struct WGPURenderTarget;
+        friend class WGPURenderTarget;
        Attachment() = default;
        Attachment(WGPUTexture* gpuTexture, uint8_t level = 0, uint16_t layer = 0)
            : level(level),
              layer(layer),
-              texture(gpuTexture->texture),
+              texture(gpuTexture->getTexture()),
              mWGPUTexture(gpuTexture) {}
        operator bool() const {
            return mWGPUTexture != nullptr;
        }
        uint8_t level = 0;
        uint16_t layer = 0;
@@ -187,8 +233,8 @@ struct WGPURenderTarget : public HwRenderTarget {
        : HwRenderTarget(0, 0),
          defaultRenderTarget(true) {}
-    void setUpRenderPassAttachments(wgpu::RenderPassDescriptor* descriptor,
+    void setUpRenderPassAttachments(wgpu::RenderPassDescriptor& descriptor,
-            const RenderPassParams& params);
+            wgpu::TextureView const& textureView, RenderPassParams const& params);
    math::uint2 getAttachmentSize() noexcept;
@@ -198,15 +244,15 @@ struct WGPURenderTarget : public HwRenderTarget {
    Attachment getDrawColorAttachment(size_t index);
    Attachment getReadColorAttachment(size_t index);
    static wgpu::LoadOp getLoadOperation(const RenderPassParams& params, TargetBufferFlags buffer);
    static wgpu::StoreOp getStoreOperation(const RenderPassParams& params, TargetBufferFlags buffer);
 private:
    static wgpu::LoadOp getLoadAction(const RenderPassParams& params, TargetBufferFlags buffer);
    static wgpu::LoadOp getStoreAction(const RenderPassParams& params, TargetBufferFlags buffer);
    bool defaultRenderTarget = false;
    uint8_t samples = 1;
    Attachment color[MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT] = {};
    math::uint2 attachmentSize = {};
    std::vector<wgpu::RenderPassColorAttachment> colorAttachments {};
 };
 }// namespace filament::backend
@@ -235,6 +235,7 @@ wgpu::RenderPipeline createWebGPURenderPipeline(wgpu::Device const& device,
        fragmentState.constantCount = program.constants.size(),
        fragmentState.constants = program.constants.data(),
        fragmentState.targetCount = 1; // TODO need to get this from the render target
        fragmentState.targets = colorTargets.data();
        assert_invariant(fragmentState.targetCount <= MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT);
        for (size_t targetIndex = 0; targetIndex < fragmentState.targetCount; targetIndex++) {
            auto& colorTarget = colorTargets[targetIndex];
@@ -105,7 +105,7 @@ void printSurfaceConfiguration(wgpu::SurfaceConfiguration const& config,
 }
 #endif
-constexpr wgpu::TextureFormat selectColorFormat(size_t availableFormatsCount,
+[[nodiscard]] constexpr wgpu::TextureFormat selectColorFormat(size_t availableFormatsCount,
        wgpu::TextureFormat const* availableFormats, bool useSRGBColorSpace) {
    const std::array expectedColorFormats =
            useSRGBColorSpace ?
@@ -123,7 +123,7 @@ constexpr wgpu::TextureFormat selectColorFormat(size_t availableFormatsCount,
    return *firstFoundColorFormat;
 }
-constexpr wgpu::TextureFormat selectDepthFormat(bool depth32FloatStencil8Enabled,
+[[nodiscard]] constexpr wgpu::TextureFormat selectDepthFormat(bool depth32FloatStencil8Enabled,
        bool needStencil) {
    if (needStencil) {
        if (depth32FloatStencil8Enabled) {
@@ -137,7 +137,7 @@ constexpr wgpu::TextureFormat selectDepthFormat(bool depth32FloatStencil8Enabled
    }
 }
-constexpr wgpu::PresentMode selectPresentMode(size_t availablePresentModesCount,
+[[nodiscard]] constexpr wgpu::PresentMode selectPresentMode(size_t availablePresentModesCount,
        wgpu::PresentMode const* availablePresentModes) {
    // Verify that our chosen present mode is supported. In practice all devices support the FIFO
    // mode, but we check for it anyway for completeness.  (and to avoid validation warnings)
@@ -151,7 +151,7 @@ constexpr wgpu::PresentMode selectPresentMode(size_t availablePresentModesCount,
    return desiredPresentMode;
 }
-constexpr wgpu::CompositeAlphaMode selectAlphaMode(size_t availableAlphaModesCount,
+[[nodiscard]] constexpr wgpu::CompositeAlphaMode selectAlphaMode(size_t availableAlphaModesCount,
        wgpu::CompositeAlphaMode const* availableAlphaModes) {
    bool autoAvailable = false;
    bool inheritAvailable = false;
@@ -222,13 +222,58 @@ void initConfig(wgpu::SurfaceConfiguration& config, wgpu::Device const& device,
    config.alphaMode = selectAlphaMode(capabilities.alphaModeCount, capabilities.alphaModes);
 }
 [[nodiscard]] wgpu::Texture createDepthTexture(wgpu::Device const& device,
        wgpu::Extent2D const& extent, wgpu::TextureFormat depthFormat) {
    wgpu::TextureDescriptor descriptor{ .label = "depth_texture",
        .usage = wgpu::TextureUsage::TextureBinding | wgpu::TextureUsage::RenderAttachment,
        .dimension = wgpu::TextureDimension::e2D,
        .size = { .width = extent.width, .height = extent.height, .depthOrArrayLayers = 1 },
        .format = depthFormat,
        .mipLevelCount = 1,
        .sampleCount = 1,
        .viewFormatCount = 1,
        .viewFormats = &depthFormat
    };
    wgpu::Texture depthTexture = device.CreateTexture(&descriptor);
    FILAMENT_CHECK_POSTCONDITION(depthTexture) << "Failed to create depth texture with width "
                                               << extent.width << " and height " << extent.height;
    return depthTexture;
 }
 [[nodiscard]] wgpu::TextureView createDepthTextureView(wgpu::Texture const& depthTexture,
        wgpu::TextureFormat depthFormat, bool needStencil) {
    wgpu::TextureViewDescriptor descriptor{
        .label = "depth_texture_view",
        .format = depthFormat,
        .dimension = wgpu::TextureViewDimension::e2D,
        .baseMipLevel = 0,
        .mipLevelCount = 1,
        .baseArrayLayer = 0,
        .arrayLayerCount = 1,
        .aspect = wgpu::TextureAspect::DepthOnly,
        .usage = wgpu::TextureUsage::TextureBinding | wgpu::TextureUsage::RenderAttachment
    };
    if (needStencil) {
        descriptor.aspect = wgpu::TextureAspect::All;
    }
    wgpu::TextureView depthTextureView = depthTexture.CreateView(&descriptor);
    FILAMENT_CHECK_POSTCONDITION(depthTextureView) << "Failed to create depth texture view";
    return depthTextureView;
 }
 }// namespace
 namespace filament::backend {
 WebGPUSwapChain::WebGPUSwapChain(wgpu::Surface&& surface, wgpu::Extent2D const& surfaceSize,
        wgpu::Adapter const& adapter, wgpu::Device const& device, uint64_t flags)
-    : mSurface(surface) {
+    : mDevice(device),
      mSurface(surface),
      mNeedStencil((flags & SWAP_CHAIN_HAS_STENCIL_BUFFER) != 0),
      mDepthFormat(selectDepthFormat(device.HasFeature(wgpu::FeatureName::Depth32FloatStencil8),
              mNeedStencil)),
      mDepthTexture(createDepthTexture(device, surfaceSize, mDepthFormat)),
      mDepthTextureView(createDepthTextureView(mDepthTexture, mDepthFormat, mNeedStencil)) {
    wgpu::SurfaceCapabilities capabilities = {};
    if (!mSurface.GetCapabilities(adapter, &capabilities)) {
        FWGPU_LOGW << "Failed to get WebGPU surface capabilities" << utils::io::endl;
@@ -238,19 +283,14 @@ WebGPUSwapChain::WebGPUSwapChain(wgpu::Surface&& surface, wgpu::Extent2D const&
 #endif
    }
    const bool useSRGBColorSpace = (flags & SWAP_CHAIN_CONFIG_SRGB_COLORSPACE) != 0;
    const bool needStencil = (flags & SWAP_CHAIN_HAS_STENCIL_BUFFER) != 0;
    initConfig(mConfig, device, capabilities, surfaceSize, useSRGBColorSpace);
    mDepthFormat = selectDepthFormat(device.HasFeature(wgpu::FeatureName::Depth32FloatStencil8),
            needStencil);
 #if FWGPU_ENABLED(FWGPU_PRINT_SYSTEM)
    printSurfaceConfiguration(mConfig, mDepthFormat);
 #endif
    mSurface.Configure(&mConfig);
 }
-WebGPUSwapChain::~WebGPUSwapChain() {
+WebGPUSwapChain::~WebGPUSwapChain() { mSurface.Unconfigure(); }
    mSurface.Unconfigure();
 }
 void WebGPUSwapChain::setExtent(wgpu::Extent2D const& currentSurfaceSize) {
    FILAMENT_CHECK_POSTCONDITION(currentSurfaceSize.width > 0 || currentSurfaceSize.height > 0)
@@ -267,6 +307,8 @@ void WebGPUSwapChain::setExtent(wgpu::Extent2D const& currentSurfaceSize) {
        // TODO we may need to ensure no surface texture is in flight when we do this. some
        //      synchronization may be necessary
        mSurface.Configure(&mConfig);
        mDepthTexture = createDepthTexture(mDevice, currentSurfaceSize, mDepthFormat);
        mDepthTextureView = createDepthTextureView(mDepthTexture, mDepthFormat, mNeedStencil);
    }
 }
@@ -38,14 +38,20 @@ public:
    [[nodiscard]] wgpu::TextureView getCurrentSurfaceTextureView(wgpu::Extent2D const&);
    [[nodiscard]] wgpu::TextureView getDepthTextureView() const { return mDepthTextureView; }
    void present();
 private:
    void setExtent(wgpu::Extent2D const&);
    wgpu::Device mDevice = nullptr;
    wgpu::Surface mSurface = {};
    wgpu::SurfaceConfiguration mConfig = {};
    bool mNeedStencil = false;
    wgpu::TextureFormat mDepthFormat = wgpu::TextureFormat::Undefined;
    wgpu::Texture mDepthTexture = nullptr;
    wgpu::TextureView mDepthTextureView = nullptr;
 };
 } // namespace filament::backend
@@ -99,22 +99,45 @@ wgpu::Adapter WebGPUPlatform::requestAdapter(wgpu::Surface const& surface) {
 wgpu::Device WebGPUPlatform::requestDevice(wgpu::Adapter const& adapter) {
    // TODO consider passing limits
-    constexpr std::array desiredFeatures = {
+    constexpr std::array optionalFeatures = { wgpu::FeatureName::DepthClipControl,
-        wgpu::FeatureName::DepthClipControl,
+        wgpu::FeatureName::Depth32FloatStencil8, wgpu::FeatureName::CoreFeaturesAndLimits };
-        wgpu::FeatureName::Depth32FloatStencil8,
+
-        wgpu::FeatureName::CoreFeaturesAndLimits };
+    constexpr std::array requiredFeatures = { wgpu::FeatureName::TransientAttachments };
-    std::vector<wgpu::FeatureName> requiredFeatures;
+
    requiredFeatures.reserve(desiredFeatures.size());
    wgpu::SupportedFeatures supportedFeatures;
    adapter.GetFeatures(&supportedFeatures);
    std::vector<wgpu::FeatureName> enabledFeatures;
    enabledFeatures.reserve(requiredFeatures.size() + optionalFeatures.size());
    std::set_intersection(supportedFeatures.features,
-            supportedFeatures.features + supportedFeatures.featureCount, desiredFeatures.begin(),
+            supportedFeatures.features + supportedFeatures.featureCount, requiredFeatures.begin(),
-            desiredFeatures.end(), std::back_inserter(requiredFeatures));
+            requiredFeatures.end(), std::back_inserter(enabledFeatures));
    if (enabledFeatures.size() != requiredFeatures.size()) {
        std::vector<wgpu::FeatureName> missingFeatures;
        std::set_difference(requiredFeatures.begin(), requiredFeatures.end(),
                supportedFeatures.features,
                supportedFeatures.features + supportedFeatures.featureCount,
                std::back_inserter(missingFeatures));
        std::stringstream missingFeaturesStream{};
        for (const auto& entry: missingFeatures) {
            missingFeaturesStream << std::to_string(static_cast<uint32_t>(entry)) << " ";
        }
        PANIC_POSTCONDITION("Some required features are not available %s/n",
                missingFeaturesStream.str().c_str());
    }
    std::set_intersection(supportedFeatures.features,
            supportedFeatures.features + supportedFeatures.featureCount, optionalFeatures.begin(),
            optionalFeatures.end(), std::back_inserter(enabledFeatures));
    wgpu::DeviceDescriptor deviceDescriptor{};
    deviceDescriptor.label = "graphics_device";
    deviceDescriptor.defaultQueue.label = "default_queue";
-    deviceDescriptor.requiredFeatureCount = requiredFeatures.size();
+    deviceDescriptor.requiredFeatureCount = enabledFeatures.size();
-    deviceDescriptor.requiredFeatures = requiredFeatures.data();
+    deviceDescriptor.requiredFeatures = enabledFeatures.data();
    deviceDescriptor.SetDeviceLostCallback(wgpu::CallbackMode::AllowSpontaneous,
            [](wgpu::Device const&, wgpu::DeviceLostReason const& reason,
                    wgpu::StringView message) {
@@ -21,6 +21,9 @@
 #include <functional>
 #include <optional>
 #include "gtest/gtest.h"
 #include "gmock/gmock.h"
 #include "backend/Handle.h"
 #include "backend/DriverApiForward.h"
 #include "BackendTest.h"
@@ -71,6 +74,7 @@ private:
 template <typename HandleType>
 filament::backend::Handle<HandleType> Cleanup::add(filament::backend::Handle<HandleType> handle) {
    EXPECT_THAT(handle, ::testing::IsTrue()) << "Added a null handle to clean up.";
    addInternal(handle);
    return handle;
 }
@@ -34,7 +34,7 @@ Shader::Shader(DriverApi& api, Cleanup& cleanup, ShaderConfig config) : mCleanup
    // This assumes that the uniforms will all be in a single descriptor set at index 1.
    // If there are shaders with uniforms in other sets then ShaderConfig will need to be expanded
    // to accommodate that.
-    size_t kDescriptorSetIndex = 1;
+    size_t kDescriptorSetIndex = 0;
    filamat::DescriptorSets descriptors;
    descriptors[kDescriptorSetIndex] = filamat::DescriptorSetInfo(config.uniforms.size());
    for (unsigned char i = 0; i < config.uniforms.size(); ++i) {
@@ -52,7 +52,7 @@ Shader::Shader(DriverApi& api, Cleanup& cleanup, ShaderConfig config) : mCleanup
                config.uniforms[i].name,
                config.uniforms[i].type.value_or(DescriptorType::UNIFORM_BUFFER), i };
    }
-    prog.descriptorBindings(1, bindingsInfo);
+    prog.descriptorBindings(0, bindingsInfo);
    mProgram = cleanup.add(api.createProgram(std::move(prog)));
    if (!kLayouts.empty()) {
@@ -66,10 +66,15 @@ filament::backend::DescriptorSetHandle Shader::createDescriptorSet(DriverApi& ap
 }
 filament::backend::ProgramHandle Shader::getProgram() const {
    assert(mProgram);
    EXPECT_THAT(mProgram, ::testing::IsTrue())
                        << "Shader program accessed despite being null.";
    return mProgram;
 }
 filament::backend::DescriptorSetLayoutHandle Shader::getDescriptorSetLayout() const {
    EXPECT_THAT(mDescriptorSetLayout, ::testing::IsTrue())
            << "Shader descriptor set layout accessed despite being null.";
    return mDescriptorSetLayout;
 }
@@ -107,7 +107,7 @@ ResolvedUniformBindingConfig UniformBindingConfig::resolve() {
            .dataSize = resolvedDataSize,
            .bufferSize = bufferSize.value_or(resolvedDataSize),
            .byteOffset = byteOffset.value_or(0),
-            .set = set.value_or(1),
+            .set = set.value_or(0),
            .binding = binding.value_or(0),
            .descriptorSet = descriptorSet
    };
@@ -138,7 +138,7 @@ std::optional<std::string> GetGlslUniform(ShaderUniformType type) {
        }
        case ShaderUniformType::Simple: {
            return R"(
-layout(binding = 0, set = 1) uniform Params {
+layout(binding = 0, set = 0) uniform Params {
    highp vec4 color;
    // Use scaleMinusOne instead of scale so that a 0 initialized value is a good default
    highp vec4 scaleMinusOne;
@@ -148,7 +148,7 @@ layout(binding = 0, set = 1) uniform Params {
        }
        case ShaderUniformType::SimpleWithPadding: {
            return R"(
-layout(binding = 0, set = 1) uniform Params {
+layout(binding = 0, set = 0) uniform Params {
    highp vec4 padding[4];  // offset of 64 bytes
    highp vec4 color;
@@ -160,7 +160,7 @@ layout(binding = 0, set = 1) uniform Params {
        }
        case ShaderUniformType::Sampler: {
            return R"(
-layout(location = 0, set = 1) uniform sampler2D test_tex;
+layout(location = 0, set = 0) uniform sampler2D test_tex;
 )";
        }
        default:
@@ -20,7 +20,8 @@
 #include <gtest/gtest.h>
 #include "BackendTest.h"
-// skipEnvironment must be a test::SkipEnvironment
+// skipEnvironment must be a test::SkipEnvironment or something that can be passed to the type's
 // constructor
 // rationale must be a string
 #define SKIP_IF(skipEnvironment, rationale)                                                    \
 do {                                                                                           \
@@ -31,6 +32,17 @@ do {
    }                                                                                          \
 } while (false)
 #define FAIL_IF(skipEnvironment, rationale)                                                    \
 do {                                                                                           \
    SkipEnvironment skip(skipEnvironment);                                                     \
    if (skip.matches()) {                                                                      \
        GTEST_FAIL()                                                                           \
                << "Failing test as the " << skip.describe() << "\n"                           \
                << " This test should be able to succeed but it needs to fail early because"   \
                << rationale;                                                                  \
    }                                                                                          \
 } while (false)
 namespace test {
 struct SkipEnvironment {
@@ -20,6 +20,7 @@
 #include "Lifetimes.h"
 #include "Shader.h"
 #include "SharedShaders.h"
 #include "Skip.h"
 #include "TrianglePrimitive.h"
 #include <utils/Hash.h>
@@ -309,7 +310,7 @@ TEST_F(BlitTest, ColorResolve) {
    PipelineState state = {};
    state.program = shader.getProgram();
-    state.pipelineLayout.setLayout[1] = { shader.getDescriptorSetLayout() };
+    state.pipelineLayout.setLayout[0] = { shader.getDescriptorSetLayout() };
    state.rasterState.colorWrite = true;
    state.rasterState.depthWrite = false;
    state.rasterState.depthFunc = RasterState::DepthFunc::A;
@@ -489,6 +490,7 @@ TEST_F(BlitTest, BlitRegion) {
 }
 TEST_F(BlitTest, BlitRegionToSwapChain) {
    FAIL_IF(Backend::VULKAN, "Crashes due to not finding color attachment");
    auto& api = getDriverApi();
    mCleanup.addPostCall([&]() { executeCommands(); });
@@ -84,7 +84,7 @@ TEST_F(BufferUpdatesTest, VertexBufferUpdate) {
        PipelineState state;
        state.program = shader.getProgram();
-        state.pipelineLayout.setLayout[1] = { shader.getDescriptorSetLayout() };
+        state.pipelineLayout.setLayout[0] = { shader.getDescriptorSetLayout() };
        state.rasterState.colorWrite = true;
        state.rasterState.depthWrite = false;
        state.rasterState.depthFunc = RasterState::DepthFunc::A;
@@ -199,8 +199,8 @@ TEST_F(BufferUpdatesTest, BufferObjectUpdateWithOffset) {
    params.flags.discardEnd = TargetBufferFlags::NONE;
    params.viewport.height = 512;
    params.viewport.width = 512;
-    renderTriangle({{ DescriptorSetLayoutHandle{}, shader.getDescriptorSetLayout() }},
+    renderTriangle({ { shader.getDescriptorSetLayout() } }, renderTarget, swapChain,
-            renderTarget, swapChain, shader.getProgram(), params);
+            shader.getProgram(), params);
    // Upload uniforms for the second triangle. To test partial buffer updates, we'll only update
    // color.b, color.a, scaleMinusOne, offset.x, and offset.y.
@@ -218,7 +218,7 @@ TEST_F(BufferUpdatesTest, BufferObjectUpdateWithOffset) {
    params.flags.clear = TargetBufferFlags::NONE;
    params.flags.discardStart = TargetBufferFlags::NONE;
-    renderTriangle({{ DescriptorSetLayoutHandle{}, shader.getDescriptorSetLayout() }},
+    renderTriangle({{ shader.getDescriptorSetLayout() }},
            renderTarget, swapChain, shader.getProgram(), params);
@@ -57,9 +57,9 @@ layout(location = 0) out vec4 fragColor;
 // Filament's Vulkan backend requires a descriptor set index of 1 for all samplers.
 // This parameter is ignored for other backends.
-layout(binding = 0, set = 1) uniform sampler2D test_tex;
+layout(binding = 0, set = 0) uniform sampler2D test_tex;
-layout(binding = 1, set = 1) uniform Params {
+layout(binding = 1, set = 0) uniform Params {
    highp float fbWidth;
    highp float fbHeight;
    highp float sourceLevel;
@@ -167,7 +167,7 @@ TEST_F(BackendTest, FeedbackLoops) {
            state.rasterState.depthWrite = false;
            state.rasterState.depthFunc = RasterState::DepthFunc::A;
            state.program = shader.getProgram();
-            state.pipelineLayout.setLayout[1] = { shader.getDescriptorSetLayout() };
+            state.pipelineLayout.setLayout[0] = { shader.getDescriptorSetLayout() };
            api.makeCurrent(swapChain, swapChain);
            api.beginFrame(0, 0, 0);
@@ -20,6 +20,7 @@
 #include "Lifetimes.h"
 #include "Shader.h"
 #include "SharedShaders.h"
 #include "Skip.h"
 #include <backend/DriverEnums.h>
 #include <backend/Handle.h>
@@ -46,7 +47,7 @@ layout(location = 0) out vec4 fragColor;
 // Filament's Vulkan backend requires a descriptor set index of 1 for all samplers.
 // This parameter is ignored for other backends.
-layout(location = 0, set = 1) uniform {samplerType} test_tex;
+layout(location = 0, set = 0) uniform {samplerType} test_tex;
 void main() {
    vec2 fbsize = vec2(512);
@@ -64,7 +65,7 @@ std::string fragmentUpdateImage3DTemplate (R"(#version 450 core
 layout(location = 0) out vec4 fragColor;
 // Filament's Vulkan backend requires a descriptor set index of 1 for all samplers.
-layout(location = 0, set = 1) uniform {samplerType} test_tex;
+layout(location = 0, set = 0) uniform {samplerType} test_tex;
 float getLayer(in sampler3D s) { return 2.5f / 4.0f; }
 float getLayer(in sampler2DArray s) { return 2.0f; }
@@ -85,7 +86,7 @@ std::string fragmentUpdateImageMip (R"(#version 450 core
 layout(location = 0) out vec4 fragColor;
 // Filament's Vulkan backend requires a descriptor set index of 1 for all samplers.
-layout(location = 0, set = 1) uniform sampler2D test_tex;
+layout(location = 0, set = 0) uniform sampler2D test_tex;
 void main() {
    vec2 fbsize = vec2(512);
@@ -211,6 +212,7 @@ static SamplerFormat getSamplerFormat(TextureFormat textureFormat) {
 }
 TEST_F(LoadImageTest, UpdateImage2D) {
    FAIL_IF(Backend::VULKAN, "Multiple test cases crash");
    // All of these test cases should result in the same rendered image, and thus the same hash.
    static const uint32_t expectedHash = 3644679986;
@@ -334,9 +336,9 @@ TEST_F(LoadImageTest, UpdateImage2D) {
                .filterMag = SamplerMagFilter::NEAREST,
                .filterMin = SamplerMinFilter::NEAREST_MIPMAP_NEAREST });
-        api.bindDescriptorSet(descriptorSet, 1, {});
+        api.bindDescriptorSet(descriptorSet, 0, {});
-        renderTriangle({{ DescriptorSetLayoutHandle{}, shader.getDescriptorSetLayout() }},
+        renderTriangle({{ shader.getDescriptorSetLayout() }},
                defaultRenderTarget, swapChain, shader.getProgram());
        EXPECT_IMAGE(defaultRenderTarget, getExpectations(),
@@ -409,9 +411,9 @@ TEST_F(LoadImageTest, UpdateImageSRGB) {
            .filterMin = SamplerMinFilter::LINEAR_MIPMAP_NEAREST
    });
-    api.bindDescriptorSet(descriptorSet, 1, {});
+    api.bindDescriptorSet(descriptorSet, 0, {});
-    renderTriangle({{ DescriptorSetLayoutHandle{}, shader.getDescriptorSetLayout() }},
+    renderTriangle({{ shader.getDescriptorSetLayout() }},
            defaultRenderTarget, swapChain, shader.getProgram());
    EXPECT_IMAGE(defaultRenderTarget, getExpectations(),
@@ -468,9 +470,9 @@ TEST_F(LoadImageTest, UpdateImageMipLevel) {
            .filterMin = SamplerMinFilter::LINEAR_MIPMAP_NEAREST
    });
-    api.bindDescriptorSet(descriptorSet, 1, {});
+    api.bindDescriptorSet(descriptorSet, 0, {});
-    renderTriangle({{ DescriptorSetLayoutHandle{}, shader.getDescriptorSetLayout() }},
+    renderTriangle({{ shader.getDescriptorSetLayout() }},
            defaultRenderTarget, swapChain, shader.getProgram());
    EXPECT_IMAGE(defaultRenderTarget, getExpectations(),
@@ -539,9 +541,9 @@ TEST_F(LoadImageTest, UpdateImage3D) {
                { .filterMag = SamplerMagFilter::LINEAR,
                    .filterMin = SamplerMinFilter::LINEAR_MIPMAP_NEAREST });
-        api.bindDescriptorSet(descriptorSet, 1, {});
+        api.bindDescriptorSet(descriptorSet, 0, {});
-        renderTriangle({ { DescriptorSetLayoutHandle{}, shader.getDescriptorSetLayout() } },
+        renderTriangle({ { shader.getDescriptorSetLayout() } },
                defaultRenderTarget, swapChain, shader.getProgram());
        EXPECT_IMAGE(defaultRenderTarget, getExpectations(),
@@ -40,7 +40,7 @@ std::string fragmentTexturedLod (R"(#version 450 core
 layout(location = 0) out vec4 fragColor;
 layout(location = 0) in vec2 uv;
-layout(location = 0, set = 1) uniform sampler2D backend_test_sib_tex;
+layout(location = 0, set = 0) uniform sampler2D backend_test_sib_tex;
 void main() {
    fragColor = textureLod(backend_test_sib_tex, uv, 1);
@@ -81,6 +81,7 @@ void main() {
 TEST_F(BackendTest, PushConstants) {
    SKIP_IF(Backend::OPENGL, "Push constants not supported on OpenGL");
    FAIL_IF(Backend::VULKAN, "Crashing due to no program set when setting push constants");
    auto& api = getDriverApi();
@@ -47,6 +47,7 @@ Shader createShader(DriverApi& api, Cleanup& cleanup, Backend backend) {
 // Rendering an external image without setting any data should not crash.
 TEST_F(BackendTest, RenderExternalImageWithoutSet) {
    SKIP_IF(Backend::METAL, "External images aren't supported in metal");
    SKIP_IF(Backend::VULKAN, "External images aren't supported in vulkan");
    auto& api = getDriverApi();
    Cleanup cleanup(api);
@@ -81,7 +82,7 @@ TEST_F(BackendTest, RenderExternalImageWithoutSet) {
    PipelineState state;
    state.program = shader.getProgram();
-    state.pipelineLayout.setLayout[1] = { shader.getDescriptorSetLayout() };
+    state.pipelineLayout.setLayout[0] = { shader.getDescriptorSetLayout() };
    state.rasterState.colorWrite = true;
    state.rasterState.depthWrite = false;
    state.rasterState.depthFunc = RasterState::DepthFunc::A;
@@ -94,7 +95,7 @@ TEST_F(BackendTest, RenderExternalImageWithoutSet) {
    api.beginFrame(0, 0, 0);
    api.updateDescriptorSetTexture(descriptorSet, 0, texture, {});
-    api.bindDescriptorSet(descriptorSet, 1, {});
+    api.bindDescriptorSet(descriptorSet, 0, {});
    // Render a triangle.
    api.beginRenderPass(defaultRenderTarget, params);
@@ -114,6 +115,7 @@ TEST_F(BackendTest, RenderExternalImageWithoutSet) {
 TEST_F(BackendTest, RenderExternalImage) {
    SKIP_IF(Backend::METAL, "External images aren't supported in metal");
    SKIP_IF(Backend::VULKAN, "External images aren't supported in vulkan");
    auto& api = getDriverApi();
    Cleanup cleanup(api);
@@ -186,7 +188,7 @@ TEST_F(BackendTest, RenderExternalImage) {
    PipelineState state;
    state.program = shader.getProgram();
-    state.pipelineLayout.setLayout[1] = { shader.getDescriptorSetLayout() };
+    state.pipelineLayout.setLayout[0] = { shader.getDescriptorSetLayout() };
    state.rasterState.colorWrite = true;
    state.rasterState.depthWrite = false;
    state.rasterState.depthFunc = RasterState::DepthFunc::A;
@@ -197,7 +199,7 @@ TEST_F(BackendTest, RenderExternalImage) {
    api.beginFrame(0, 0, 0);
    api.updateDescriptorSetTexture(descriptorSet, 0, texture, {});
-    api.bindDescriptorSet(descriptorSet, 1, {});
+    api.bindDescriptorSet(descriptorSet, 0, {});
    // Render a triangle.
    api.beginRenderPass(defaultRenderTarget, params);
@@ -1098,12 +1098,16 @@ void FMaterial::processPushConstants(FEngine&, MaterialParser const* parser) {
            });
 }
-void FMaterial::precacheDepthVariants(FEngine const& engine) {
+void FMaterial::precacheDepthVariants(FEngine& engine) {
    bool const disableDepthPrecacheForDefaultMaterial = engine.getDriverApi().isWorkaroundNeeded(
                               Workaround::DISABLE_DEPTH_PRECACHE_FOR_DEFAULT_MATERIAL);
    // pre-cache all depth variants inside the default material. Note that this should be
    // entirely optional; if we remove this pre-caching, these variants will be populated
    // later, when/if needed by createAndCacheProgram(). Doing it now potentially uses more
    // memory and increases init time, but reduces hiccups during the first frame.
-    if (UTILS_UNLIKELY(mIsDefaultMaterial)) {
+    if (UTILS_UNLIKELY(mIsDefaultMaterial && !disableDepthPrecacheForDefaultMaterial)) {
        const bool stereoSupported = mEngine.getDriverApi().isStereoSupported();
        auto const allDepthVariants = VariantUtils::getDepthVariants();
        for (auto const variant: allDepthVariants) {
@@ -1136,6 +1140,7 @@ void FMaterial::precacheDepthVariants(FEngine const& engine) {
 void FMaterial::processDescriptorSets(FEngine& engine, MaterialParser const* const parser) {
    UTILS_UNUSED_IN_RELEASE bool success;
    success = parser->getDescriptorBindings(&mProgramDescriptorBindings);
    assert_invariant(success);
@@ -1143,6 +1148,22 @@ void FMaterial::processDescriptorSets(FEngine& engine, MaterialParser const* con
    success = parser->getDescriptorSetLayout(&descriptorSetLayout);
    assert_invariant(success);
    // Setup Labels for debugging
    utils::CString namestr;
    utils::StaticString perViewStr = "_perView";
    utils::StaticString singleStr = "_single";
    parser->getName(&namestr);
    utils::CString singleLabel(namestr.c_str(), namestr.length() + singleStr.length());
    memccpy(singleLabel.c_str() + namestr.length(), singleStr.c_str(), '\0', singleStr.length());
    utils::CString perViewLabel(namestr.c_str(), namestr.length() + perViewStr.length());
    memccpy(perViewLabel.c_str() + namestr.length(), perViewStr.c_str(), '\0', perViewStr.length());
    descriptorSetLayout[0].label = namestr;
    descriptorSetLayout[1].label = perViewLabel;
    mDescriptorSetLayout = {
            engine.getDescriptorSetLayoutFactory(),
            engine.getDriverApi(), std::move(descriptorSetLayout[0]) };
@@ -298,7 +298,7 @@ private:
    void processPushConstants(FEngine& engine, MaterialParser const* parser);
-    void precacheDepthVariants(FEngine const& engine);
+    void precacheDepthVariants(FEngine& engine);
    void processDescriptorSets(FEngine& engine, MaterialParser const* parser);
@@ -824,6 +824,9 @@ void FRenderer::renderJob(RootArenaScope& rootArenaScope, FView& view) {
    variant.setDirectionalLighting(view.hasDirectionalLighting());
    variant.setDynamicLighting(view.hasDynamicLighting());
    variant.setFog(view.hasFog());
    // The VSM bit has a different meaning for STANDARD_VARIANT (as opposed to DEPTH_VARIANT),
    // In the STANDARD_VARIANT case, we are *using* the shadow-map, and the VSM only decides which
    // type of sampler is used (samplerShadow or sampler2D).
    variant.setVsm(view.hasShadowing() && view.getShadowType() != ShadowType::PCF);
    variant.setStereo(view.hasStereo());
@@ -841,7 +844,11 @@ void FRenderer::renderJob(RootArenaScope& rootArenaScope, FView& view) {
    if (view.needsShadowMap()) {
        Variant shadowVariant(Variant::DEPTH_VARIANT);
        // The VSM bit has a different meaning for DEPTH_VARIANT (as opposed to STANDARD_VARIANT),
        // In the DEPTH_VARIANT case, we are *generating* the shadow-map, and some computations
        // are handled differently. In addition, the color buffer is used.
        shadowVariant.setVsm(view.getShadowType() == ShadowType::VSM);
        auto shadows = view.renderShadowMaps(engine, fg, cameraInfo, mShaderUserTime,
                RenderPassBuilder{ commandArena }
                    .renderFlags(renderFlags)
@@ -1,12 +1,12 @@
 Pod::Spec.new do |spec|
  spec.name = "Filament"
-  spec.version = "1.59.3"
+  spec.version = "1.59.4"
  spec.license = { :type => "Apache 2.0", :file => "LICENSE" }
  spec.homepage = "https://google.github.io/filament"
  spec.authors = "Google LLC."
  spec.summary = "Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS, and WASM/WebGL."
  spec.platform = :ios, "11.0"
-  spec.source = { :http => "https://github.com/google/filament/releases/download/v1.59.3/filament-v1.59.3-ios.tgz" }
+  spec.source = { :http => "https://github.com/google/filament/releases/download/v1.59.4/filament-v1.59.4-ios.tgz" }
  # Fix linking error with Xcode 12; we do not yet support the simulator on Apple silicon.
  spec.pod_target_xcconfig = {
@@ -50,7 +50,7 @@ struct Variant {
    // DEP: Depth only
    // FOG: Fog
    // PCK: Picking (depth variant only)
-    // VSM: Variance shadow maps
+    // VSM: Variance shadow maps (depth) / sampler type (standard)
    // STE: Instanced stereo rendering
    //
    //   X: either 1 or 0
@@ -75,7 +75,8 @@ struct Variant {
    //                      | STE | VSM | PCK |  1  | SKN |  0  |  0  |  0  |   16 - 4 = 12
    //                      +-----+-----+-----+-----+-----+-----+-----+-----+
    //       Vertex depth      X     X     0     1     X     0     0     0
-    //     Fragment depth      0     X     X     1     0     0     0     0
+    //     Fragment depth      0     0     X     1     0     0     0     0
    //     Fragment depth      0     1     0     1     0     0     0     0
    //           Reserved      X     1     1     1     X     0     0     0     [  -4]
    //
    // 96 variants used, 160 reserved (256 - 96)
@@ -95,7 +96,7 @@ struct Variant {
    static constexpr type_t DEP   = 0x10; // depth only variants
    static constexpr type_t FOG   = 0x20; // fog (standard)
    static constexpr type_t PCK   = 0x20; // picking (depth)
-    static constexpr type_t VSM   = 0x40; // variance shadow maps
+    static constexpr type_t VSM   = 0x40; // variance shadow maps / sampler type
    static constexpr type_t STE   = 0x80; // instanced stereo
    // special variants (variants that use the reserved space)
@@ -113,21 +114,21 @@ struct Variant {
    static constexpr type_t UNLIT_MASK         = STE | SKN | FOG;
    // returns raw variant bits
-    inline bool hasDirectionalLighting() const noexcept { return key & DIR; }
+    bool hasDirectionalLighting() const noexcept { return key & DIR; }
-    inline bool hasDynamicLighting() const noexcept     { return key & DYN; }
+    bool hasDynamicLighting() const noexcept     { return key & DYN; }
-    inline bool hasSkinningOrMorphing() const noexcept  { return key & SKN; }
+    bool hasSkinningOrMorphing() const noexcept  { return key & SKN; }
-    inline bool hasStereo() const noexcept              { return key & STE; }
+    bool hasStereo() const noexcept              { return key & STE; }
-    inline void setDirectionalLighting(bool v) noexcept { set(v, DIR); }
+    void setDirectionalLighting(bool v) noexcept { set(v, DIR); }
-    inline void setDynamicLighting(bool v) noexcept     { set(v, DYN); }
+    void setDynamicLighting(bool v) noexcept     { set(v, DYN); }
-    inline void setShadowReceiver(bool v) noexcept      { set(v, SRE); }
+    void setShadowReceiver(bool v) noexcept      { set(v, SRE); }
-    inline void setSkinning(bool v) noexcept            { set(v, SKN); }
+    void setSkinning(bool v) noexcept            { set(v, SKN); }
-    inline void setFog(bool v) noexcept                 { set(v, FOG); }
+    void setFog(bool v) noexcept                 { set(v, FOG); }
-    inline void setPicking(bool v) noexcept             { set(v, PCK); }
+    void setPicking(bool v) noexcept             { set(v, PCK); }
-    inline void setVsm(bool v) noexcept                 { set(v, VSM); }
+    void setVsm(bool v) noexcept                 { set(v, VSM); }
-    inline void setStereo(bool v) noexcept              { set(v, STE); }
+    void setStereo(bool v) noexcept              { set(v, STE); }
-    inline static constexpr bool isValidDepthVariant(Variant variant) noexcept {
+    static constexpr bool isValidDepthVariant(Variant variant) noexcept {
        // Can't have VSM and PICKING together with DEPTH variants
        constexpr type_t RESERVED_MASK  = VSM | PCK | DEP | SRE | DYN | DIR;
        constexpr type_t RESERVED_VALUE = VSM | PCK | DEP;
@@ -135,7 +136,7 @@ struct Variant {
               ((variant.key & RESERVED_MASK) != RESERVED_VALUE);
   }
-    inline static constexpr bool isValidStandardVariant(Variant variant) noexcept {
+    static constexpr bool isValidStandardVariant(Variant variant) noexcept {
        // can't have shadow receiver if we don't have any lighting
        constexpr type_t RESERVED0_MASK  = VSM | FOG | SRE | DYN | DIR;
        constexpr type_t RESERVED0_VALUE = VSM | FOG | SRE;
@@ -154,11 +155,11 @@ struct Variant {
               ((variant.key & RESERVED2_MASK) != RESERVED2_VALUE);
    }
-    inline static constexpr bool isVertexVariant(Variant variant) noexcept {
+    static constexpr bool isVertexVariant(Variant variant) noexcept {
        return filterVariantVertex(variant) == variant;
    }
-    inline static constexpr bool isFragmentVariant(Variant variant) noexcept {
+    static constexpr bool isFragmentVariant(Variant variant) noexcept {
        return filterVariantFragment(variant) == variant;
    }
@@ -170,32 +171,32 @@ struct Variant {
        return isValidStandardVariant(variant) || isValidDepthVariant(variant);
    }
-    inline static constexpr bool isSSRVariant(Variant variant) noexcept {
+    static constexpr bool isSSRVariant(Variant variant) noexcept {
        return (variant.key & (STE | VSM | DEP | SRE | DYN | DIR)) == (VSM | SRE);
    }
-    inline static constexpr bool isVSMVariant(Variant variant) noexcept {
+    static constexpr bool isVSMVariant(Variant variant) noexcept {
        return !isSSRVariant(variant) && ((variant.key & VSM) == VSM);
    }
-    inline static constexpr bool isShadowReceiverVariant(Variant variant) noexcept {
+    static constexpr bool isShadowReceiverVariant(Variant variant) noexcept {
        return !isSSRVariant(variant) && ((variant.key & SRE) == SRE);
    }
-    inline static constexpr bool isFogVariant(Variant variant) noexcept {
+    static constexpr bool isFogVariant(Variant variant) noexcept {
        return (variant.key & (FOG | DEP)) == FOG;
    }
-    inline static constexpr bool isPickingVariant(Variant variant) noexcept {
+    static constexpr bool isPickingVariant(Variant variant) noexcept {
        return (variant.key & (PCK | DEP)) == (PCK | DEP);
    }
-    inline static constexpr bool isStereoVariant(Variant variant) noexcept {
+    static constexpr bool isStereoVariant(Variant variant) noexcept {
        return (variant.key & STE) == STE;
    }
    static constexpr Variant filterVariantVertex(Variant variant) noexcept {
-        // filter out vertex variants that are not needed. For e.g. fog doesn't affect the
+        // Filter out vertex variants that are not needed. For e.g. fog doesn't affect the
        // vertex shader.
        if ((variant.key & STANDARD_MASK) == STANDARD_VARIANT) {
            if (isSSRVariant(variant)) {
@@ -33,11 +33,13 @@ namespace filament::descriptor_sets {
 using namespace backend;
-static DescriptorSetLayout const postProcessDescriptorSetLayout{{
+static DescriptorSetLayout const postProcessDescriptorSetLayout{
    utils::StaticString("postProcess"),{
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
 }};
-static DescriptorSetLayout const depthVariantDescriptorSetLayout{{
+static DescriptorSetLayout const depthVariantDescriptorSetLayout{
    utils::StaticString("depthVariant"),{
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
 }};
@@ -46,14 +48,16 @@ static DescriptorSetLayout const depthVariantDescriptorSetLayout{{
 // dedicated SSR vertex shader), which uses perViewDescriptorSetLayout.
 // This means that PerViewBindingPoints::SHADOWS must be in the layout even though it's not used
 // by the SSR variant.
-static DescriptorSetLayout const ssrVariantDescriptorSetLayout{{
+static DescriptorSetLayout const ssrVariantDescriptorSetLayout{
    utils::StaticString("ssrVariant"),{
   { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
   { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SHADOWS        },
   { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::STRUCTURE      },
   { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SSR            },
 }};
-static DescriptorSetLayout perViewDescriptorSetLayout = {{
+static DescriptorSetLayout perViewDescriptorSetLayout = {
    utils::StaticString("perView"),{
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SHADOWS        },
    { DescriptorType::UNIFORM_BUFFER,                            ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::LIGHTS         },
@@ -68,7 +72,8 @@ static DescriptorSetLayout perViewDescriptorSetLayout = {{
    { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FOG            },
 }};
-static DescriptorSetLayout perRenderableDescriptorSetLayout = {{
+static DescriptorSetLayout perRenderableDescriptorSetLayout = {
    utils::StaticString("perRenderable"),{
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerRenderableBindingPoints::OBJECT_UNIFORMS, DescriptorFlags::DYNAMIC_OFFSET },
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerRenderableBindingPoints::BONES_UNIFORMS,  DescriptorFlags::DYNAMIC_OFFSET },
    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerRenderableBindingPoints::MORPHING_UNIFORMS         },
@@ -90,6 +90,7 @@ bool ApiHandler::handleGetApiShader(struct mg_connection* conn,
    std::string_view const essl1("essl1");
    std::string_view const msl("msl");
    std::string_view const spirv("spirv");
    std::string_view const wgsl("wgsl");
    size_t const qlength = strlen(request->query_string);
    char type[6] = {};
@@ -102,11 +103,13 @@ bool ApiHandler::handleGetApiShader(struct mg_connection* conn,
    char glindex[4] = {};
    char vkindex[4] = {};
    char metalindex[4] = {};
    char wgpuindex[4] = {};
    mg_get_var(request->query_string, qlength, "glindex", glindex, sizeof(glindex));
    mg_get_var(request->query_string, qlength, "vkindex", vkindex, sizeof(vkindex));
    mg_get_var(request->query_string, qlength, "metalindex", metalindex, sizeof(metalindex));
    mg_get_var(request->query_string, qlength, "wgpuindex", wgpuindex, sizeof(wgpuindex));
-    if (!glindex[0] && !vkindex[0] && !metalindex[0]) {
+    if (!glindex[0] && !vkindex[0] && !metalindex[0] && !wgpuindex[0]) {
        return error(__LINE__, uri);
    }
@@ -218,6 +221,37 @@ bool ApiHandler::handleGetApiShader(struct mg_connection* conn,
        return softError("Only MSL is supported.");
    }
    if (wgpuindex[0]) {
        ShaderExtractor extractor(ShaderLanguage::WGSL, result->package, result->packageSize);
        if (!extractor.parse()) {
            return error(__LINE__, uri);
        }
        FixedCapacityVector<ShaderInfo> info(getShaderCount(package, ChunkType::MaterialWgsl));
        if (!getShaderInfo(package, info.data(), ChunkType::MaterialWgsl)) {
            return error(__LINE__, uri);
        }
        int const shaderIndex = std::stoi(wgpuindex);
        if (shaderIndex >= info.size()) {
            return error(__LINE__, uri);
        }
        auto const& item = info[shaderIndex];
        filaflat::ShaderContent content;
        extractor.getShader(item.shaderModel, item.variant, item.pipelineStage, content);
        if (language == wgsl) {
            std::string const shader = mFormatter.format((char const*) content.data());
            mg_printf(conn, kSuccessHeader.data(), "application/txt");
            mg_write(conn, shader.c_str(), shader.size());
            return true;
        }
        return softError("Only WGSL is supported.");
    }
    return error(__LINE__, uri);
 }
@@ -181,6 +181,18 @@ static bool printMetalInfo(ostream& json, const ChunkContainer& container) {
    return true;
 }
 static bool printWGPUInfo(ostream& json, const ChunkContainer& container) {
    std::vector<ShaderInfo> info;
    info.resize(getShaderCount(container, ChunkType::MaterialWgsl));
    if (!getShaderInfo(container, info.data(), ChunkType::MaterialWgsl)) {
        return false;
    }
    json << "\"webgpu\": [\n";
    printShaderInfo(json, info, container);
    json << "],\n";
    return true;
 }
 bool JsonWriter::writeMaterialInfo(const filaflat::ChunkContainer& container) {
    ostringstream json;
    if (!printMaterial(json, container)) {
@@ -201,6 +213,9 @@ bool JsonWriter::writeMaterialInfo(const filaflat::ChunkContainer& container) {
    if (!printMetalInfo(json, container)) {
        return false;
    }
    if (!printWGPUInfo(json, container)) {
        return false;
    }
    json << "\"required_attributes\": [\n";
    uint32_t requiredAttributes;
@@ -39,6 +39,9 @@ async function fetchShaderCode(matid, backend, language, index) {
        case "metal":
            query = `type=${language}&metalindex=${index}`;
            break;
        case "webgpu":
            query = `type=${language}&wgpuindex=${index}`;
            break;
    }
    return await _fetchText(`api/shader?matid=${matid}&${query}`);
 }
@@ -88,6 +91,7 @@ function rebuildMaterial(materialId, backend, shaderIndex, editedText) {
            break;
        case "vulkan": api = 2; break;
        case "metal":  api = 3; break;
        case "webgpu":  api = 4; break;
    }
    return new Promise((ok, fail) => {
        const req = new XMLHttpRequest();
@@ -14,7 +14,7 @@
 * limitations under the License.
 */
-import { LitElement, html, css, unsafeCSS, nothing } from "https://unpkg.com/lit@2.8.0?module";
+import { LitElement, html, css, unsafeCSS, nothing } from "https://cdn.jsdelivr.net/gh/lit/dist@3/all/lit-all.min.js";
 const kUntitledPlaceholder = "untitled";
@@ -24,6 +24,7 @@ const LANGUAGE_CHOICES = {
    'essl1': ['essl3', 'essl1'],
    'vulkan': ['glsl', 'spirv'],
    'metal': ['msl'],
    'webgpu': ['wgsl'],
 };
 const DEFAULT_LANGUAGE_FOR_BACKEND = {
@@ -31,6 +32,7 @@ const DEFAULT_LANGUAGE_FOR_BACKEND = {
    'essl1': 'essl1',
    'vulkan': 'glsl',
    'metal': 'msl',
    'webgpu': 'wgsl',
 };
 const BACKENDS = Object.keys(LANGUAGE_CHOICES);
@@ -229,10 +229,10 @@ MaybeError ValidateWriteBuffer(const DeviceBase* device,
                               uint64_t size) {
    DAWN_TRY(device->ValidateObject(buffer));
-    DAWN_INVALID_IF(bufferOffset % 4 != 0, "BufferOffset (%u) is not a multiple of 4.",
+    // DAWN_INVALID_IF(bufferOffset % 4 != 0, "BufferOffset (%u) is not a multiple of 4.",
-                    bufferOffset);
+    //                 bufferOffset);
-
+    //
-    DAWN_INVALID_IF(size % 4 != 0, "Size (%u) is not a multiple of 4.", size);
+    // DAWN_INVALID_IF(size % 4 != 0, "Size (%u) is not a multiple of 4.", size);
    uint64_t bufferSize = buffer->GetSize();
    DAWN_INVALID_IF(bufferOffset > bufferSize || size > (bufferSize - bufferOffset),
@@ -1176,10 +1176,10 @@ export interface View$DynamicResolutionOptions {
    /**
     * Upscaling quality
     * LOW:    bilinear filtered blit. Fastest, poor quality
-     * MEDIUM: AMD FidelityFX FSR1 w/ mobile optimizations
+     * MEDIUM: Qualcomm Snapdragon Game Super Resolution (SGSR) 1.0
     * HIGH:   AMD FidelityFX FSR1 w/ mobile optimizations
     * ULTRA:  AMD FidelityFX FSR1
-     *      FSR1 require a well anti-aliased (MSAA or TAA), noise free scene.
+     *      FSR1 and SGSR require a well anti-aliased (MSAA or TAA), noise free scene. Avoid FXAA and dithering.
     *
     * The default upscaling quality is set to LOW.
     */
@@ -1675,7 +1675,7 @@ export enum View$TemporalAntiAliasingOptions$JitterPattern {
 */
 export interface View$TemporalAntiAliasingOptions {
    /**
-     * reconstruction filter width typically between 0.2 (sharper, aliased) and 1.5 (smoother)
+     * reconstruction filter width typically between 1 (sharper) and 2 (smoother)
     */
    filterWidth?: number;
    /**
@@ -1,6 +1,6 @@
 {
  "name": "filament",
-  "version": "1.59.3",
+  "version": "1.59.4",
  "description": "Real-time physically based rendering engine",
  "main": "filament.js",
  "module": "filament.js",
Author	SHA1	Message	Date
Syed Idris Shah	5d59459f90	Dawn change to enable writeBuffer for size != multiple of 4	2025-05-06 14:07:05 -04:00
bridgewaterrobbieandAndy Hovingh	4249ff6cfb	WebGPU: HelloTraingle hacks Co-authored-by: Andy Hovingh <6198728+AndyHovingh@users.noreply.github.com>	2025-05-06 14:07:05 -04:00
bridgewaterrobbie	1076433fc0	Use variant layout label if available	2025-05-06 14:06:53 -04:00
bridgewaterrobbie	3bd0039ee9	Minimal labels implementation for descriptorset layout	2025-05-06 13:22:33 -04:00
Konrad Piascik	67b9c72442	Fix windows compile errors	2025-05-06 12:24:42 -04:00
Andy Hovingh	c1a8d73384	webgpu: legacy draw call should call draw2	2025-05-06 12:24:42 -04:00
Andy Hovingh	2d98ac878e	webgpu: sets bind groups in the render pass	2025-05-06 12:24:42 -04:00
Andy Hovingh	35ab5f768d	webgpu: depth texture and attachment	2025-05-06 12:24:42 -04:00
bridgewaterrobbieandJuan Caldas	705b3c39f4	WebGPU: Add Draw call, with temporary hack to achieve spinning triangle Co-authored-by: Juan Caldas <juancaldas@google.com>	2025-05-06 12:24:42 -04:00
bridgewaterrobbie Andy Hovingh Juan Caldas	56231db326	WebGPU: Set spec constants via string mapping Co-authored-by: Andy Hovingh <6198728+AndyHovingh@users.noreply.github.com> Co-authored-by: Juan Caldas <juancaldas@google.com>	2025-05-06 12:24:42 -04:00
bridgewaterrobbie Andy Hovingh Syed Idris Shah	e97f7ef628	WebGPU: Render Target Implementation Co-authored-by: Andy Hovingh <6198728+AndyHovingh@users.noreply.github.com> Co-authored-by: Syed Idris Shah <idrisshah@google.com>	2025-05-06 12:24:42 -04:00
bridgewaterrobbieandAndy Hovingh	4570c2e710	WebGPU: Sampler, Texture and Descriptor Set setup Co-authored-by: Andy Hovingh <6198728+AndyHovingh@users.noreply.github.com>	2025-05-06 12:24:42 -04:00
bridgewaterrobbie	4759237e66	Separate out required and optional features for webgpu. Panic if any required features are not available	2025-05-06 12:24:42 -04:00
Matthew Hoffman	543b93939a	Optional CMake flag for enabling ASAN for backend and its tests. (#8696 )	2025-05-05 12:35:21 -05:00
Benjamin Doherty	9b356926b8	Release Filament 1.59.4	2025-05-01 17:33:19 -07:00
Matthew Hoffman	7179ab5b9d	Prevent all backend vulkan tests from crashing. (#8682 ) Many still fail that shouldn't though.	2025-05-01 21:50:56 +00:00
Sungun Park	0a6bbdb35c	Add flag to disable depth precaching (#8686 ) Depth precaching can cause initial startup stalls, particularly on platforms such as WebGL on FireFox/Mac. This option allows us to disable depth precaching, which can be useful for eliminating the initial startup hiccups or stalls due to the upfront precaching of depth variants. BUG=[392917621]	2025-05-01 20:41:04 +00:00
Mathias Agopian	29919e64cd	update remote ui, web samples and documentation	2025-05-01 10:21:27 -07:00
Andy Hovingh	a7660e40f8	webgpu: fix command buffer (+encoder) life-cycle (avoids breaks on multiple render passes)	2025-05-01 07:31:58 -05:00
Mathias Agopian	22e1f9b930	better comments regarding Variant::VSM	2025-04-30 11:59:37 -07:00
Juan Caldas	e205611128	BUGS=397448737 Add WebGPU Support to matdbg	2025-04-30 17:43:28 +00:00