Adopted the improvements to TangentSpaceGenerator.cpp from master
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f3607134a2
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@ -12,8 +12,8 @@ TangentSpaceGenerator::TangentSpaceGenerator()
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N_(new osg::Vec4Array)
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{
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T_->setBinding(osg::Array::BIND_PER_VERTEX); T_->setNormalize(false);
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B_->setBinding(osg::Array::BIND_PER_VERTEX); T_->setNormalize(false);
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N_->setBinding(osg::Array::BIND_PER_VERTEX); T_->setNormalize(false);
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B_->setBinding(osg::Array::BIND_PER_VERTEX); B_->setNormalize(false);
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N_->setBinding(osg::Array::BIND_PER_VERTEX); N_->setNormalize(false);
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}
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TangentSpaceGenerator::TangentSpaceGenerator(const TangentSpaceGenerator ©, const osg::CopyOp ©op)
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@ -281,107 +281,74 @@ void TangentSpaceGenerator::compute(osg::PrimitiveSet *pset,
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OSG_WARN << "Warning: TangentSpaceGenerator: texture coord array must be Vec2Array, Vec3Array or Vec4Array" << std::endl;
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}
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if(nx){
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osg::Vec3 V, T1, T2, T3, B1, B2, B3;
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osg::Vec3 V, T1, T2, T3, B1, B2, B3;
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V = osg::Vec3(P2.x() - P1.x(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.x() - P1.x(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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T1.x() += -V.y() / V.x();
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B1.x() += -V.z() / V.x();
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T2.x() += -V.y() / V.x();
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B2.x() += -V.z() / V.x();
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T3.x() += -V.y() / V.x();
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B3.x() += -V.z() / V.x();
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}
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V = osg::Vec3(P2.y() - P1.y(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.y() - P1.y(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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T1.y() += -V.y() / V.x();
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B1.y() += -V.z() / V.x();
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T2.y() += -V.y() / V.x();
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B2.y() += -V.z() / V.x();
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T3.y() += -V.y() / V.x();
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B3.y() += -V.z() / V.x();
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}
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V = osg::Vec3(P2.z() - P1.z(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.z() - P1.z(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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T1.z() += -V.y() / V.x();
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B1.z() += -V.z() / V.x();
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T2.z() += -V.y() / V.x();
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B2.z() += -V.z() / V.x();
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T3.z() += -V.y() / V.x();
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B3.z() += -V.z() / V.x();
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}
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osg::Vec3 tempvec;
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tempvec = N1 ^ T1;
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(*T_)[iA] = osg::Vec4(tempvec ^ N1, 0);
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tempvec = B1 ^ N1;
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(*B_)[iA] = osg::Vec4(N1 ^ tempvec, 0);
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tempvec = N2 ^ T2;
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(*T_)[iB] = osg::Vec4(tempvec ^ N2, 0);
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tempvec = B2 ^ N2;
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(*B_)[iB] = osg::Vec4(N2 ^ tempvec, 0);
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tempvec = N3 ^ T3;
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(*T_)[iC] = osg::Vec4(tempvec ^ N3, 0);
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tempvec = B3 ^ N3;
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(*B_)[iC] = osg::Vec4(N3 ^ tempvec, 0);
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(*N_)[iA] += osg::Vec4(N1, 0);
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(*N_)[iB] += osg::Vec4(N2, 0);
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(*N_)[iC] += osg::Vec4(N3, 0);
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// no normal per vertex use the one by face
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if (!nx) {
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N1 = (P2 - P1) ^ (P3 - P1);
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N2 = N1;
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N3 = N1;
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}
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else{
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osg::Vec3 face_normal = (P2 - P1) ^ (P3 - P1);
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osg::Vec3 V;
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V = osg::Vec3(P2.x() - P1.x(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.x() - P1.x(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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(*T_)[iA].x() += -V.y() / V.x();
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(*B_)[iA].x() += -V.z() / V.x();
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(*T_)[iB].x() += -V.y() / V.x();
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(*B_)[iB].x() += -V.z() / V.x();
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(*T_)[iC].x() += -V.y() / V.x();
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(*B_)[iC].x() += -V.z() / V.x();
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}
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V = osg::Vec3(P2.y() - P1.y(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.y() - P1.y(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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(*T_)[iA].y() += -V.y() / V.x();
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(*B_)[iA].y() += -V.z() / V.x();
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(*T_)[iB].y() += -V.y() / V.x();
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(*B_)[iB].y() += -V.z() / V.x();
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(*T_)[iC].y() += -V.y() / V.x();
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(*B_)[iC].y() += -V.z() / V.x();
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}
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V = osg::Vec3(P2.z() - P1.z(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.z() - P1.z(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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(*T_)[iA].z() += -V.y() / V.x();
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(*B_)[iA].z() += -V.z() / V.x();
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(*T_)[iB].z() += -V.y() / V.x();
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(*B_)[iB].z() += -V.z() / V.x();
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(*T_)[iC].z() += -V.y() / V.x();
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(*B_)[iC].z() += -V.z() / V.x();
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}
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(*N_)[iA] += osg::Vec4(face_normal, 0);
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(*N_)[iB] += osg::Vec4(face_normal, 0);
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(*N_)[iC] += osg::Vec4(face_normal, 0);
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V = osg::Vec3(P2.x() - P1.x(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.x() - P1.x(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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T1.x() += -V.y() / V.x();
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B1.x() += -V.z() / V.x();
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T2.x() += -V.y() / V.x();
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B2.x() += -V.z() / V.x();
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T3.x() += -V.y() / V.x();
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B3.x() += -V.z() / V.x();
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}
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V = osg::Vec3(P2.y() - P1.y(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.y() - P1.y(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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T1.y() += -V.y() / V.x();
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B1.y() += -V.z() / V.x();
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T2.y() += -V.y() / V.x();
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B2.y() += -V.z() / V.x();
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T3.y() += -V.y() / V.x();
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B3.y() += -V.z() / V.x();
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}
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V = osg::Vec3(P2.z() - P1.z(), uv2.x() - uv1.x(), uv2.y() - uv1.y()) ^
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osg::Vec3(P3.z() - P1.z(), uv3.x() - uv1.x(), uv3.y() - uv1.y());
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if (V.x() != 0) {
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V.normalize();
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T1.z() += -V.y() / V.x();
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B1.z() += -V.z() / V.x();
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T2.z() += -V.y() / V.x();
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B2.z() += -V.z() / V.x();
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T3.z() += -V.y() / V.x();
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B3.z() += -V.z() / V.x();
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}
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osg::Vec3 tempvec;
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tempvec = N1 ^ T1;
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(*T_)[iA] += osg::Vec4(tempvec ^ N1, 0);
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tempvec = B1 ^ N1;
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(*B_)[iA] += osg::Vec4(N1 ^ tempvec, 0);
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tempvec = N2 ^ T2;
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(*T_)[iB] += osg::Vec4(tempvec ^ N2, 0);
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tempvec = B2 ^ N2;
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(*B_)[iB] += osg::Vec4(N2 ^ tempvec, 0);
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tempvec = N3 ^ T3;
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(*T_)[iC] += osg::Vec4(tempvec ^ N3, 0);
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tempvec = B3 ^ N3;
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(*B_)[iC] += osg::Vec4(N3 ^ tempvec, 0);
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(*N_)[iA] += osg::Vec4(N1, 0);
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(*N_)[iB] += osg::Vec4(N2, 0);
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(*N_)[iC] += osg::Vec4(N3, 0);
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}
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