mirror of https://github.com/CGAL/cgal
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
#ifndef CGAL_AFSR_CONSTRUCT_POLYHEDRON_2
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#define CGAL_AFSR_CONSTRUCT_POLYHEDRON_2
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#include <CGAL/Polyhedron_incremental_builder_3.h>
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#include <CGAL/Polyhedron_3.h>
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namespace CGAL {
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template <class Kernel, class Triangulation, class Filter>
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class Advancing_front_polyhedron_reconstruction;
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namespace AFSR {
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template <class HDS, class Surface>
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class Construct_polyhedron: public CGAL::Modifier_base<HDS> {
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const Surface& s;
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public:
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Construct_polyhedron(Surface& s)
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: s(s)
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{}
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void operator()( HDS& hds)
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{
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CGAL::Polyhedron_incremental_builder_3<HDS> B( hds, true);
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B.begin_surface( s.number_of_vertices(), s.number_of_facets(), 6* s.number_of_facets());
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typedef typename HDS::Vertex Vertex;
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typedef typename Vertex::Point Point;
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typedef typename Surface::TDS_2 TDS_2;
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typedef typename TDS_2::Face_iterator Face_iterator;
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typedef typename TDS_2::Vertex_iterator Vertex_iterator;
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typedef typename Surface::Cell_handle Cell_handle;
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const TDS_2& tds = s.triangulation_data_structure_2();
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int index = 0;
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Vertex_iterator end = tds.vertices_end();
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for(Vertex_iterator vit = tds.vertices_begin(); vit != end; ++vit){
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if(vit->vertex_3() != s.triangulation_3().infinite_vertex()){
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B.add_vertex(vit->point());
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vit->vertex_3()->id() = index++;
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}
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}
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for(Face_iterator fit = tds.faces_begin(); fit != tds.faces_end(); ++fit){
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if(fit->is_on_surface()){
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B.begin_facet();
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for(int i=0; i < 3; i++){
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B.add_vertex_to_facet(fit->vertex(i)->vertex_3()->id());
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}
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B.end_facet();
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}
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}
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B.end_surface();
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}
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};
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template <class Polyhedron, class Surface>
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void
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construct_polyhedron(Polyhedron& P, Surface& surface)
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{
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typedef typename Polyhedron::HalfedgeDS HalfedgeDS;
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Construct_polyhedron<HalfedgeDS, Surface> builder(surface);
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P.delegate(builder);
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}
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} // namespace AFSR
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} // namespace CGAL
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#endif // CGAL_AFSR_CONSTRUCT_POLYHEDRON_2
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