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- // Include own header
- #include "MeshTools.hpp"
- void MeshTools::calculateNormals(const std::vector<Lib3MF::sPosition> verticesBuffer, const std::vector<Lib3MF::sTriangle> triangleBuffer, osg::ref_ptr<osg::Vec3Array> vertices, osg::ref_ptr<osg::Vec3Array> normals) {
- for (const Lib3MF::sTriangle triangle: triangleBuffer) {
- // Create osg vectors
- osg::Vec3 vertex[3] = {};
- for (char i = 0; i < 3; i++) {
- vertex[i] = osg::Vec3(verticesBuffer[triangle.m_Indices[i]].m_Coordinates[0], verticesBuffer[triangle.m_Indices[i]].m_Coordinates[1], verticesBuffer[triangle.m_Indices[i]].m_Coordinates[2]);
- }
- // Calculate normal
- osg::Vec3 edgeOne = vertex[1].operator-(vertex[0]);
- osg::Vec3 edgeTwo = vertex[2].operator-(vertex[0]);
- osg::Vec3 normal = edgeOne.operator^(edgeTwo);
- normal.normalize();
- // Store them
- for (int i = 0; i < 3; i++) {
- vertices->push_back(vertex[i]);
- normals->push_back(normal);
- }
- }
- }
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