Created
August 15, 2017 14:01
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The code for problem described in (http://cgal-discuss.949826.n4.nabble.com/Mesh-deformation-produces-strange-results-td4662924.html)
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| typedef CGAL::Exact_predicates_inexact_constructions_kernel K; | |
| typedef K::Point_3 Point_3; | |
| typedef CGAL::Surface_mesh<Point_3> Mesh; | |
| typedef boost::graph_traits<Mesh>::vertex_descriptor vertex_descriptor; | |
| typedef boost::graph_traits<Mesh>::vertex_iterator vertex_iterator; | |
| typedef boost::graph_traits<Mesh>::halfedge_iterator halfedge_iterator; | |
| typedef CGAL::Surface_mesh_deformation<Mesh, CGAL::Default, CGAL::Default, CGAL::Deformation_algorithm_tag::SRE_ARAP> Surface_mesh_deformation; | |
| void deformMesh(Mesh &cgalMesh, int* ctrlPtIdx, Vector3* targetPositions, int pointCount, int iterations, double tolerance) | |
| { | |
| // Create a deformation object | |
| Surface_mesh_deformation deform_mesh(cgalMesh); | |
| deform_mesh.set_sre_arap_alpha(0); | |
| // Definition of the region of interest (use the whole mesh) | |
| vertex_iterator vb, ve; | |
| boost::tie(vb, ve) = vertices(cgalMesh); | |
| deform_mesh.insert_roi_vertices(vb, ve); | |
| vector<vertex_descriptor> _ctrlPtIdx; | |
| vector<Surface_mesh_deformation::Point> _targetPositions; | |
| for (int i = 0; i < pointCount; i++) { | |
| vertex_descriptor control_p = *CGAL::cpp11::next(vb, ctrlPtIdx[i]); | |
| _ctrlPtIdx.push_back(control_p); | |
| deform_mesh.insert_control_vertex(control_p); | |
| _targetPositions.push_back(Surface_mesh_deformation::Point(targetPositions[i].x, targetPositions[i].y, targetPositions[i].z)); | |
| } | |
| cout << "Preprocessing..." << endl; | |
| bool is_matrix_factorization_OK = deform_mesh.preprocess(); | |
| if (!is_matrix_factorization_OK) { | |
| std::cerr << "Error in preprocessing, check documentation of preprocess()" << std::endl; | |
| return; | |
| } | |
| for (int j = 0; j < pointCount; j++) | |
| deform_mesh.set_target_position(_ctrlPtIdx[j], _targetPositions[j]); | |
| cout << "Deforming..." << endl; | |
| deform_mesh.deform(iterations, tolerance); | |
| cout << "Saving..." << endl; | |
| // Save the deformed mesh into a file | |
| std::ofstream out1("deform.off"); | |
| out1 << cgalMesh; | |
| out1.close(); | |
| } |
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