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three

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JavaScript 3D library

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export default /* glsl */` vec3 transformedNormal = objectNormal; #ifdef USE_TANGENT vec3 transformedTangent = objectTangent; #endif #ifdef USE_BATCHING // this is in lieu of a per-instance normal-matrix // shear transforms in the instance matrix are not supported mat3 bm = mat3( batchingMatrix ); transformedNormal /= vec3( dot( bm[ 0 ], bm[ 0 ] ), dot( bm[ 1 ], bm[ 1 ] ), dot( bm[ 2 ], bm[ 2 ] ) ); transformedNormal = bm * transformedNormal; #ifdef USE_TANGENT transformedTangent = bm * transformedTangent; #endif #endif #ifdef USE_INSTANCING // this is in lieu of a per-instance normal-matrix // shear transforms in the instance matrix are not supported mat3 im = mat3( instanceMatrix ); transformedNormal /= vec3( dot( im[ 0 ], im[ 0 ] ), dot( im[ 1 ], im[ 1 ] ), dot( im[ 2 ], im[ 2 ] ) ); transformedNormal = im * transformedNormal; #ifdef USE_TANGENT transformedTangent = im * transformedTangent; #endif #endif transformedNormal = normalMatrix * transformedNormal; #ifdef FLIP_SIDED transformedNormal = - transformedNormal; #endif #ifdef USE_TANGENT transformedTangent = ( modelViewMatrix * vec4( transformedTangent, 0.0 ) ).xyz; #ifdef FLIP_SIDED transformedTangent = - transformedTangent; #endif #endif `;