sceneform-1.9pr2

This release of Filament is a check point release towards Sceneform 1.9.

List of relevant changes since sceneform-1.9pr1:

⚠️ This version breaks older Materials

Enhancements

Engine

• Add postLightingColor property to materials (#1057)
• Add new shading model to Filament for specularGlossiness. (#1083)
• Allow dynamic doubleSided and materialThreshold
• Stable mode for shadows
• Improve shadows depth resolution for large scenes
• Add support for polygon offset in shadow map parameters
• Bake the constant bias into the shadow-map
• Better clamping for dot(N, V) (#1106)
• Decouple tone-mapping, FXAA, MSAA and dynamic resolution
• MSAA is now disabled when post-processing is disabled

Compatibility

• Use ASharedMemory on Android when available
• Don't call EGL during static initialization
• Workaround a UBO/glFlush interaction on some GPUs

Documentation

• Add Filamat documentation (#1103)

Tools

Refactoring

• Separate src/driver into its own library, libbackend
• Rename namespace filament::driver -> filament::backend
• Make all subclasses of Platform private, except OpenGLPlatform

libmath

• Conversion between vec and vec are now implicit
• Added vec{2|3|4}
• Remove vector comparison operators

Bug fixes

• Fix FBO leak when using MSAA in some cases
• Honor clear color, fixes #1125
• Better frustum/box intersection, make code more robust
• Fix the calculation of the shadow constant bias
• Fix LISPSM warping frustum computation
• Actually set the IBL rotation from the builder
• Don't flip the normals (#1060 -)
• Fix min/max calls in Box::unionSelf (#984)