240 lines
12 KiB
HTML
240 lines
12 KiB
HTML
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</div>
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<h1 class="menu-title">Filament</h1>
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<script>
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document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
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document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
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</script>
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<div id="content" class="content">
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<main>
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<h1 id="description"><a class="header" href="#description">Description</a></h1>
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<p><code>gltfio</code> is a loader library that consumes <code>gltf</code> or <code>glb</code> content and produces Filament
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objects. For usage details, see the docstring for <code>AssetLoader</code>.</p>
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<p>gltfio has two plug-in interfaces, <code>TextureProvider</code> and <code>MaterialProvider</code>. Filament ships with
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several ready-to-go implementations described below.</p>
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<ul>
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<li><code>MaterialProvider</code> creates Filament materials in response to certain glTF requirements.
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<ul>
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<li><a href="#ubershaderloader">UbershaderProvider</a> loads pre-built materials.</li>
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<li><code>JitShaderProvider</code> builds materials at run time using the <code>filamat</code> library.</li>
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</ul>
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</li>
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<li><code>TextureProvider</code> creates and populates Filament <code>Texture</code> objects.
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<ul>
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<li><code>StbProvider</code> uses the STB library to read PNG and JPEG files.</li>
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<li><code>Ktx2Provider</code> uses the BasisU library to read KTX2 files.</li>
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</ul>
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</li>
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</ul>
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<h1 id="ubershaderprovider"><a class="header" href="#ubershaderprovider">UbershaderProvider</a></h1>
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<p><code>UbershaderProvider</code> is a ready-to-go implementation of the <code>MaterialProvider</code> interface that should
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be used in applications that need fast startup times. There is no material compilation that
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occurs at run time, but the shaders might be relatively large and complex.</p>
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<p>At load time, the ubershader loader consumes an <em>ubershader archive</em> which is a precompiled set of
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materials bundled with formal descriptions of the glTF features that they support.</p>
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<p>The <code>uberz</code> command line tool consumes a list of <code>.spec</code> and <code>.filamat</code> files and produces a single
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<code>.uberz</code> file. For details on these two file formats, see the README in <code>libs/uberz</code>.</p>
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</main>
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