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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.
21 lines
873 B
GLSL
21 lines
873 B
GLSL
//! Calculates Cook-Torrance BRDF.
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vec3 occPBRCookTorrance (in vec3 theView,
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in vec3 theLight,
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in vec3 theNormal,
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in vec3 theBaseColor,
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in float theMetallic,
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in float theRoughness,
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in float theIOR)
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{
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vec3 aHalf = normalize (theView + theLight);
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float aCosV = max(dot(theView, theNormal), 0.0);
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float aCosL = max(dot(theLight, theNormal), 0.0);
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float aCosH = max(dot(aHalf, theNormal), 0.0);
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float aCosVH = max(dot(aHalf, theView), 0.0);
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vec3 aCookTorrance = occPBRDistribution (aCosH, theRoughness)
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* occPBRGeometry (aCosV, aCosL, theRoughness)
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* occPBRFresnel (theBaseColor, theMetallic, theIOR, aCosVH);
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aCookTorrance /= 4.0;
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return aCookTorrance;
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}
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