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86 Commits
Author SHA1 Message Date
Romain Guy 705c1969b2 Add clearCoatIorChange property to materials (#890) 
This property can be used to control the darkening of the base layer
due to a change in index of refraction when going through the clear
coat layer.
 2019-02-27 10:30:46 -08:00
Romain Guy 552b1c551f The cloth material model is not more expensive 2019-02-26 14:50:25 -08:00
Romain Guy 4738e93b83 Replace Cloth DFG approximation with DFG LUT 
By removing the Fresnel term (often ommitted from fabric/cloth BRDFs)
we can store the DG term for the cloth BRDF in the 3rd channel of the
existing DFG LUT.
 2019-02-21 11:44:52 -08:00
Romain Guy 6f9df5bfab Update incorrect equations of importance sampling 2019-02-19 17:59:39 -08:00
Romain Guy 42acac02c0 Update documentation 
Add titles and use energy preservation vs conservation to describe
two different concepts.
 2019-02-15 09:26:52 +00:00
François Guthmann 8253006899 Typo correction 
Switched arguments in prefilteredDFG_LUT call to align with function definition in the documentation and in the code.
 2019-02-08 10:24:15 -08:00
Romain Guy 81a52411ed Clarify Fresnel term for IBL implementation of clear coat 2019-01-25 13:49:44 -08:00
Romain Guy f3752a42c8 Document UV flipping behavior and add control attribute (#720) 
Materials can disbale this behavior by setting flipUV: false
in the header section of the material definition.

Fixes #672
 2019-01-17 11:12:16 -08:00
Romain Guy 0394aeb23b Add specular anti-aliasing properties to materials (#697) 
* Add specular anti-aliasing properties to materials

curvatureToRoughness
limitOverInterpolation

These techiques were supposed to be enabled by default on
desktop but it turns out they were broken. They must now
be enabled manually on each material instead (and work on
mobile).

* Update docs/Materials.md.html
 2019-01-14 12:25:51 -08:00
Romain Guy eaf790aaa7 Improve rendering to TextureView (#635) 
* Improve rendering to TextureView

UiHelper wasn't calling the resize callback at init time when attaching
to a TextureView, but it was for a SurfaceView. This makes both code
paths consistent and fixes the standard samples if they are modified to
render to a TextureView.

This change also adds a new sample app that shows how to render into
a TextureView.

* Suppress warning

* Suppress another warning
 2018-12-13 15:57:15 -08:00
Romain Guy 380e3fa690 Simplify UiHelper API, add transparent rendering sample (#629) 
* Simplify UiHelper API, add transparent rendering sample

* Rename the app

* Address review comments

Also use the proper package name
 2018-12-13 09:09:09 -08:00
Romain Guy a38c40cf11 Turn on shaders optimization by default (#614) 
* Turn on shaders optimization by default

Release builds of Filament only work well with optimize shaders,
turning optimizations on by default will help avoid mismatches.

This change also adds -g to disable all optimizations, for debug
builds.

* Use -g on debug builds

* Use -g on debug builds

* Update tutorial_redball.md to remove matc's -O

* Update tutorial_suzanne.md to remove matc's -O

* Use -g in debug builds
 2018-12-11 09:36:37 -08:00
Mathias Agopian cd00c4bbe8 Add getUserTimeModulo() to materials 
This calculates the modulo of the user time by a given value, using
the high precision user time. This is useful for animations without
having to worry about resetting the time.
 2018-12-10 21:36:20 -08:00
Mathias Agopian 76b15e895a [MATERIALS BREAK] higher period clock 
THIS CHANGE BREAKS MATERIALS.

This adds getUserTime() in shaders/materials, which returns the time
in second since Renderer::resetUserTime() was called.
Two values are provided, the time in second encoded as a float and
the difference between that and the double value, which together allows
to perform high precision time computation when needed.

This change allows longer running animations in materials. Using only
the float value, give millisecond resolution for more than 4h.
 2018-12-10 16:28:07 -08:00
Philip Rideout 083a60938e Update web site to v1.1.0 (includes KTX fixes) 2018-12-07 09:43:30 -08:00
Philip Rideout beaf751604 filamesh: Compress attributes individually. 
This further reduces compressed suzanne from 333489 bytes to 272761.

Tested with vk_hellopbr and tutorial_suzanne.html

Issue #558
 2018-12-05 17:15:52 -08:00
Romain Guy e6cb4d0dfa Update sample screenshots in README 2018-11-28 11:43:13 -08:00
François Guthmann 9915ec7841 EV100 formula typo (#543) 
Forgot the parenthesis when I corrected it, I'm sorry...
 2018-11-28 09:31:13 -08:00
François Guthmann 78804251e9 Corrected typo in formula (#519) 
It looks like there is a minus sign missing in there, see https://www.wolframalpha.com/input/?i=(((1%2Bsqrt(x))+%2F+(1+-+sqrt(x)))+-+1.5)+%2F+(((1%2Bsqrt(x))+%2F+(1+-+sqrt(x)))+%2B+1.5)

I'm not sure what the code does though https://github.com/google/filament/blob/master/shaders/src/brdf.fs#L282
 2018-11-23 10:09:54 -08:00
François Guthmann 5a402dc6a8 Corrected exposure from ev100 formula (#518) 
The new formula should be the correct one according to this document (first line p86): https://seblagarde.files.wordpress.com/2015/07/course_notes_moving_frostbite_to_pbr_v32.pdf
 2018-11-22 10:03:29 -08:00
Romain Guy 55dd612c64 Add screenshots to Android samples' README (#513) 
This change also optimizes the size of existing images using squoosh.app.
This should make the main README a lot lighter and faster to load (it saves
several MiBs).
 2018-11-21 14:16:21 -08:00
Philip Rideout 1ed8618cca Refresh website to publish new tutorial. 2018-11-16 17:21:18 -08:00
Romain Guy 0938051579 Fix docs 2018-11-15 16:57:16 -08:00
Vallentin 81e8035cbb Fixed typos (#487) 2018-11-14 09:19:04 -08:00
Philip Rideout 73a2ef7944 Add favicon. 2018-11-13 12:07:57 -08:00
Philip Rideout 7c2c4f3b11 Fix parquet wrap mode. 2018-11-13 12:07:47 -08:00
Philip Rideout 0faf7bbcb6 Publish Hugo site and web tutorials. 
This performs the steps described in site/README in order to publish
the Hugo site to GitHub Pages:

    https://google.github.io/filament
 2018-11-13 11:24:41 -08:00
Romain Guy bb3e9a47e5 Update link to CIE colormetric tables 
Fixes #452
 2018-11-05 15:53:41 -08:00
Philip Rideout a42dcd2291 JavaScript code re-org (#443) 
This removes the old CPP-based web samples in favor of the new JS API.

The `web/samples` folder will be added in a subsequent commit.
 2018-11-01 17:05:30 -07:00
François Guthmann 4177eb14ed Removed typo (#322) 
The word 'from' was repeated twice unnecessarily.
 2018-10-01 11:19:02 -07:00
Mathias Agopian 3bf0d6a4ab document artifacts due to giving up mipmaps (#299) 
* document artifacts due to giving up mipmaps

- also talk about lod remapping
- try to avoid to confuse alpha with roughness

* fix typos
 2018-09-24 16:14:52 -07:00
Mathias Agopian 22f7599e73 Try to clarify the sections about cubemaps (#296) 
* Try to clarify the sections about cubemaps

* fix typos and spelling

* don’t mention filament’s APIs by name
 2018-09-24 12:54:22 -07:00
Romain Guy 234dbaf00b Clarify IBL evaluation steps 2018-09-19 18:50:48 -07:00
Mathias Agopian 670d9986f3 fix typo and improve language in important sampling doc (#271) 2018-09-19 10:44:26 -07:00
Mathias Agopian a14ceb5dca better explanation of the Jacobian used in importance sampling 2018-09-18 22:57:54 -07:00
Mathias Agopian 0f5e501dda Add images illustrating IBL prefiltering errors. (#268) 2018-09-18 19:08:21 -07:00
Mathias Agopian df0594872e rewrite IBL prefiltering documentation 2018-09-18 14:45:47 -07:00
Mathias Agopian cb88609015 fix @romainguy comments and improve equations 2018-09-18 14:45:47 -07:00
Mathias Agopian d3e6fa1005 WIP: better explication of the “split-sum” 
DO NOT MERGE
 2018-09-18 14:45:47 -07:00
Romain Guy e4c9fd2ac1 Fix documentation typos 2018-09-18 10:33:40 -07:00
Romain Guy 41d70cb30a Fix anisotropy BRDF on mobile (#245) 
mediump computations are not enough for certain roughness values.
 2018-09-13 18:31:08 -07:00
Romain Guy cc102be69f Fix docs typo 
Closes #228
 2018-09-10 10:19:16 -07:00
A. Tombs f78a680b9c Documentation grammar and typo fixes (#174) 
* Missing parameter in visibility function equation

The visibility function V_1 depends on l (or v) and alpha, but alpha was omitted in one equation.

* Fix typo its vs it is

* Fix typo usign -> using

* Fix typo algorightm -> algorithm

* Fix typo later -> latter

* Grammar: much less -> many fewer

* Fix missing equation label

Equation was referred to in the text, but did not have its label defined, causing the reference to show up as ???.

* Fix typo itentiy -> itentity

* Fix typo apperance -> appearance

* Fix typo participe -> participate

* Fix typo: scaterring -> scattering

* Consistency: grey -> gray

Since the document mostly uses American English, replace occurrences of "grey" (preferred spelling in UK) with "gray" (preferred spelling in US).

* Fix typo: interemdiate -> intermediate

* Fix typo: anistropic -> anisotropic

* Style: gaussian -> Gaussian

* Fix typo: particulary -> particularly

* Fix typo: subsitution -> substitution

* Fix typo: fomulate -> formulate

* Fix typo: evector -> vector

* Fix typo: tempetature -> temperature

* Fix typo: ar -> at

* Style: lambertian -> Lambertian

* Fix typo: disapears -> disappears

* Fix typo: acounting -> accounting

* Fix typo: simplificationss -> simplifications

* Fix typo: subsitute -> substitute

* Style: light saber -> lightsaber

* Fix typo: cooordinates -> coordinates

* Fix typo: probaility -> probability

* Fix typo: Hammersely -> Hammersley

* Fix typo: Mistuba -> Mitsuba
 2018-08-28 11:35:53 -07:00
Romain Guy 88fb551d30 Explains sq() in code snippet 
Closes #171
 2018-08-28 10:57:59 -07:00
Romain Guy d74811d5e7 Fix typo in multiscatter equation 
Fixes #167
 2018-08-28 09:01:36 -07:00
Romain Guy 89743004f3 Use n instead of shading_normal 2018-08-27 13:35:21 -07:00
Romain Guy 1740f23be4 Remove unnecessary code 2018-08-27 13:34:43 -07:00
Romain Guy 4c2b538422 Explain fp16 transform of the NDF 2018-08-27 13:32:14 -07:00
Tim van Scherpenzeel 966d1e5de2 fixed three small spelling mistakes (#149) 2018-08-26 10:01:41 -07:00
Romain Guy 4585b8f896 Add clearCoatNormal property (#131) 
* Add clear coat normal map support

This change allows to set a separate normal map for the clear coat layer of a material.

* Document the new clearCoatNormal property

* Fix typo
 2018-08-24 08:56:44 -07:00