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- vec2 uvOffset = vec2(0.0, 0.0);
- #if defined(BUMP) || defined(PARALLAX)
- #ifdef NORMALXYSCALE
- float normalScale = 1.0;
- #else
- float normalScale = vBumpInfos.y;
- #endif
- #if defined(TANGENT) && defined(NORMAL)
- mat3 TBN = vTBN;
- #else
- mat3 TBN = cotangent_frame(normalW * normalScale, vPositionW, vBumpUV);
- #endif
- #endif
- #ifdef PARALLAX
- mat3 invTBN = transposeMat3(TBN);
- #ifdef PARALLAXOCCLUSION
- uvOffset = parallaxOcclusion(invTBN * -viewDirectionW, invTBN * normalW, vBumpUV, vBumpInfos.z);
- #else
- uvOffset = parallaxOffset(invTBN * viewDirectionW, vBumpInfos.z);
- #endif
- #endif
- #ifdef BUMP
- normalW = perturbNormal(TBN, vBumpUV + uvOffset);
- #endif
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