X-Git-Url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=blobdiff_plain;f=src%2FShaders%2FShaders_TangentSpaceNormal_glsl.pxx;h=0878cd55f3c6a1d382dcdf1d340652dcf941796a;hb=786077023239ed807d12180613e223f95a545b70;hpb=6216ed573eba2e021c05ae79b13de3404ae2633d

diff --git a/src/Shaders/Shaders_TangentSpaceNormal_glsl.pxx b/src/Shaders/Shaders_TangentSpaceNormal_glsl.pxx
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+++ b/src/Shaders/Shaders_TangentSpaceNormal_glsl.pxx
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+// This file has been automatically generated from resource file src/Shaders/TangentSpaceNormal.glsl
+
+static const char Shaders_TangentSpaceNormal_glsl[] =
+  "//! Calculates transformation from tangent space and apply it to value from normal map to get normal in object space\n"
+  "vec3 TangentSpaceNormal (in mat2 theDeltaUVMatrix,\n"
+  "                         in mat2x3 theDeltaVectorMatrix,\n"
+  "                         in vec3 theNormalMapValue,\n"
+  "                         in vec3 theNormal,\n"
+  "                         in bool theIsInverse)\n"
+  "{\n"
+  "  theNormalMapValue = normalize(theNormalMapValue * 2.0 - vec3(1.0));\n"
+  "  // Inverse matrix\n"
+  "  theDeltaUVMatrix = mat2 (theDeltaUVMatrix[1][1], -theDeltaUVMatrix[0][1], -theDeltaUVMatrix[1][0], theDeltaUVMatrix[0][0]);\n"
+  "  theDeltaVectorMatrix = theDeltaVectorMatrix * theDeltaUVMatrix;\n"
+  "  // Gram-Schmidt orthogonalization\n"
+  "  theDeltaVectorMatrix[1] = normalize(theDeltaVectorMatrix[1] - dot(theNormal, theDeltaVectorMatrix[1]) * theNormal);\n"
+  "  theDeltaVectorMatrix[0] = cross(theDeltaVectorMatrix[1], theNormal);\n"
+  "  float aDirection = theIsInverse ? -1.0 : 1.0;\n"
+  "  return mat3 (aDirection * theDeltaVectorMatrix[0], aDirection * theDeltaVectorMatrix[1], theNormal) * theNormalMapValue;\n"
+  "}\n";