fireball/lib/renderers/shaders/ShaderChunk/normal_fragment_maps.glsl
2018-12-25 17:29:22 +03:30

32 lines
567 B
GLSL

#ifdef USE_NORMALMAP
#ifdef OBJECTSPACE_NORMALMAP
normal = texture2D( normalMap, vUv ).xyz * 2.0 - 1.0; // overrides both flatShading and attribute normals
#ifdef FLIP_SIDED
normal = - normal;
#endif
#ifdef DOUBLE_SIDED
normal = normal * ( float( gl_FrontFacing ) * 2.0 - 1.0 );
#endif
normal = normalize( normalMatrix * normal );
#else // tangent-space normal map
normal = perturbNormal2Arb( -vViewPosition, normal );
#endif
#elif defined( USE_BUMPMAP )
normal = perturbNormalArb( -vViewPosition, normal, dHdxy_fwd() );
#endif