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7860770232
Base normal map support has been implemented in path tracing (just geometry normal replacement). Smooth normal adaptation has been implemeneted in order to avoid black areas artefacts during path tracing. Tangent normal space calcuation has been moved to separate unified function. Tangent space orthogonalization algorithm has been changed in order to handle all orientations and combinations of UV coordinates.
21 lines
1.3 KiB
Plaintext
21 lines
1.3 KiB
Plaintext
// This file has been automatically generated from resource file src/Shaders/TangentSpaceNormal.glsl
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static const char Shaders_TangentSpaceNormal_glsl[] =
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"//! Calculates transformation from tangent space and apply it to value from normal map to get normal in object space\n"
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"vec3 TangentSpaceNormal (in mat2 theDeltaUVMatrix,\n"
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" in mat2x3 theDeltaVectorMatrix,\n"
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" in vec3 theNormalMapValue,\n"
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" in vec3 theNormal,\n"
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" in bool theIsInverse)\n"
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"{\n"
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" theNormalMapValue = normalize(theNormalMapValue * 2.0 - vec3(1.0));\n"
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" // Inverse matrix\n"
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" theDeltaUVMatrix = mat2 (theDeltaUVMatrix[1][1], -theDeltaUVMatrix[0][1], -theDeltaUVMatrix[1][0], theDeltaUVMatrix[0][0]);\n"
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" theDeltaVectorMatrix = theDeltaVectorMatrix * theDeltaUVMatrix;\n"
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" // Gram-Schmidt orthogonalization\n"
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" theDeltaVectorMatrix[1] = normalize(theDeltaVectorMatrix[1] - dot(theNormal, theDeltaVectorMatrix[1]) * theNormal);\n"
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" theDeltaVectorMatrix[0] = cross(theDeltaVectorMatrix[1], theNormal);\n"
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" float aDirection = theIsInverse ? -1.0 : 1.0;\n"
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" return mat3 (aDirection * theDeltaVectorMatrix[0], aDirection * theDeltaVectorMatrix[1], theNormal) * theNormalMapValue;\n"
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"}\n";
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