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- #ifdef BUMP
- vec2 bumpUV = vBumpUV;
- #endif
- #if defined(BUMP) || defined(PARALLAX)
- mat3 TBN = cotangent_frame(normalW * vBumpInfos.y, -viewDirectionW, bumpUV);
- #endif
- #ifdef PARALLAX
- mat3 invTBN = transposeMat3(TBN);
- #ifdef PARALLAXOCCLUSION
- vec2 uvOffset = parallaxOcclusion(invTBN * -viewDirectionW, invTBN * normalW, bumpUV, vBumpInfos.z);
- #else
- vec2 uvOffset = parallaxOffset(invTBN * viewDirectionW, vBumpInfos.z);
- #endif
- diffuseUV += uvOffset;
- bumpUV += uvOffset;
- #endif
- #ifdef BUMP
- normalW = perturbNormal(viewDirectionW, TBN, bumpUV);
- #endif
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