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67312b7991
Metallic-Roughness shading model Graphic3d_TOSM_PBR has been implemented. New materials descriptors Graphic3d_PBRMaterial have been added to Graphic3d_MaterialAspect. PBR shading model requires OpenGL 3.0+ or OpenGL ES 3.0+ hardware. Environment cubemap is expected to be provided for realistic look of metallic materials. occLight_IsHeadlight() now returns bool instead of int. Avoid using lowp for enumerations to workaround occLight_IsHeadlight() ignorance on Adreno 308 caused by some GLSL optimizator bugs. OpenGl_Texture::EstimatedDataSize() - fixed estimation for Cubemap textures. OpenGl_Sampler::applySamplerParams() - fixed uninitialized GL_TEXTURE_WRAP_R in case of GL_TEXTURE_CUBE_MAP target.
14 lines
354 B
GLSL
14 lines
354 B
GLSL
//! Calculates geometry factor for Cook-Torrance BRDF.
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float occPBRGeometry (in float theCosV,
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in float theCosL,
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in float theRoughness)
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{
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float k = theRoughness + 1.0;
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k *= 0.125 * k;
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float g1 = 1.0;
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g1 /= theCosV * (1.0 - k) + k;
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float g2 = 1.0;
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g2 /= theCosL * (1.0 - k) + k;
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return g1 * g2;
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}
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