83 lines
4.2 KiB
C++
83 lines
4.2 KiB
C++
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2016 Alec Jacobson
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "projected_cdt.h"
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#include "insert_into_cdt.h"
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#include "assign_scalar.h"
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#include "../../list_to_matrix.h"
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template <typename Kernel, typename Index>
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IGL_INLINE void igl::copyleft::cgal::projected_cdt(
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const std::vector<CGAL::Object> & objects,
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const CGAL::Plane_3<Kernel> & P,
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std::vector<CGAL::Point_3<Kernel> >& vertices,
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std::vector<std::vector<Index> >& faces)
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{
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typedef CGAL::Triangulation_vertex_base_2<Kernel> TVB_2;
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typedef CGAL::Constrained_triangulation_face_base_2<Kernel> CTFB_2;
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typedef CGAL::Triangulation_data_structure_2<TVB_2,CTFB_2> TDS_2;
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typedef CGAL::Exact_intersections_tag Itag;
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typedef CGAL::Constrained_Delaunay_triangulation_2<Kernel,TDS_2,Itag> CDT_2;
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typedef CGAL::Constrained_triangulation_plus_2<CDT_2> CDT_plus_2;
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CDT_plus_2 cdt;
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for(const auto & obj : objects) insert_into_cdt(obj,P,cdt);
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// Read off vertices of the cdt, remembering index
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std::map<typename CDT_plus_2::Vertex_handle,Index> v2i;
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size_t count=0;
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for (
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auto itr = cdt.finite_vertices_begin();
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itr != cdt.finite_vertices_end();
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itr++)
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{
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vertices.push_back(P.to_3d(itr->point()));
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v2i[itr] = count;
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count++;
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}
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// Read off faces and store index triples
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for (
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auto itr = cdt.finite_faces_begin();
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itr != cdt.finite_faces_end();
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itr++)
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{
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faces.push_back(
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{ v2i[itr->vertex(0)], v2i[itr->vertex(1)], v2i[itr->vertex(2)] });
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}
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}
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template < typename Kernel, typename DerivedV, typename DerivedF>
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IGL_INLINE void igl::copyleft::cgal::projected_cdt(
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const std::vector<CGAL::Object> & objects,
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const CGAL::Plane_3<Kernel> & P,
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Eigen::PlainObjectBase<DerivedV> & V,
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Eigen::PlainObjectBase<DerivedF> & F)
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{
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std::vector<CGAL::Point_3<Kernel> > vertices;
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std::vector<std::vector<typename DerivedF::Scalar> > faces;
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projected_cdt(objects,P,vertices,faces);
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V.resize(vertices.size(),3);
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for(int v = 0;v<vertices.size();v++)
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{
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for(int d = 0;d<3;d++)
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{
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assign_scalar(vertices[v][d], V(v,d));
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}
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}
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list_to_matrix(faces,F);
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template void igl::copyleft::cgal::projected_cdt<CGAL::Epick, long>(std::vector<CGAL::Object, std::allocator<CGAL::Object> > const&, CGAL::Plane_3<CGAL::Epick> const&, std::vector<CGAL::Point_3<CGAL::Epick>, std::allocator<CGAL::Point_3<CGAL::Epick> > >&, std::vector<std::vector<long, std::allocator<long> >, std::allocator<std::vector<long, std::allocator<long> > > >&);
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// generated by autoexplicit.sh
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template void igl::copyleft::cgal::projected_cdt<CGAL::Epeck, long>(std::vector<CGAL::Object, std::allocator<CGAL::Object> > const&, CGAL::Plane_3<CGAL::Epeck> const&, std::vector<CGAL::Point_3<CGAL::Epeck>, std::allocator<CGAL::Point_3<CGAL::Epeck> > >&, std::vector<std::vector<long, std::allocator<long> >, std::allocator<std::vector<long, std::allocator<long> > > >&);
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#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
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#ifdef WIN32
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template void igl::copyleft::cgal::projected_cdt<class CGAL::Epeck, __int64>(class std::vector<class CGAL::Object, class std::allocator<class CGAL::Object>> const &, class CGAL::Plane_3<class CGAL::Epeck> const &, class std::vector<class CGAL::Point_3<class CGAL::Epeck>, class std::allocator<class CGAL::Point_3<class CGAL::Epeck>>> &, class std::vector<class std::vector<__int64, class std::allocator<__int64>>, class std::allocator<class std::vector<__int64, class std::allocator<__int64>>>> &);
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template void igl::copyleft::cgal::projected_cdt<class CGAL::Epick, __int64>(class std::vector<class CGAL::Object, class std::allocator<class CGAL::Object>> const &, class CGAL::Plane_3<class CGAL::Epick> const &, class std::vector<class CGAL::Point_3<class CGAL::Epick>, class std::allocator<class CGAL::Point_3<class CGAL::Epick>>> &, class std::vector<class std::vector<__int64, class std::allocator<__int64>>, class std::allocator<class std::vector<__int64, class std::allocator<__int64>>>> &);
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#endif
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#endif
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