mirror of https://github.com/CGAL/cgal
74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
// Copyright (c) 2015 GeometryFactory
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//
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// This file is part of CGAL (www.cgal.org)
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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// Author(s) : Andreas Fabri
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#ifndef CGAL_IO_POLYHEDRON_STL_BUILDER_H
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#define CGAL_IO_POLYHEDRON_STL_BUILDER_H
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#include <CGAL/license/Polyhedron.h>
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#include <CGAL/Modifier_base.h>
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#include <CGAL/Polyhedron_incremental_builder_3.h>
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#include <CGAL/IO/STL.h>
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#include <iostream>
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namespace CGAL{
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template <class HDS>
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class Polyhedron_builder_from_STL : public CGAL::Modifier_base<HDS> {
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typedef typename HDS::Vertex::Point Point_3;
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typedef std::vector<std::array<double, 3> > Points_3;
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typedef std::array<int,3> Facet;
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typedef std::vector<Facet> Surface;
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std::istream& is;
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Points_3 meshPoints;
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Surface mesh;
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public:
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Polyhedron_builder_from_STL(std::istream& is_)
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: is(is_)
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{}
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void operator()( HDS& hds) {
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if(!read_STL(is, meshPoints, mesh)) return;
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CGAL::Polyhedron_incremental_builder_3<HDS> B(hds);
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B.begin_surface( meshPoints.size(), mesh.size());
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typedef typename Points_3::size_type size_type;
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for(size_type i=0; i < meshPoints.size(); i++){
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B.add_vertex(
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Point_3(meshPoints[i][0], meshPoints[i][1], meshPoints[i][2])
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);
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}
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for(size_type i=0; i < mesh.size(); i++){
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B.begin_facet();
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B.add_vertex_to_facet( mesh[i][0]);
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B.add_vertex_to_facet( mesh[i][1]);
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B.add_vertex_to_facet( mesh[i][2]);
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B.end_facet();
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}
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if(B.error())
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{
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std::cerr << "An error occurred while creating a Polyhedron" << std::endl;
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B.rollback();
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}
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B.end_surface();
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}
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};
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} //end of CGAL namespace
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#endif // CGAL_IO_POLYHEDRON_STL_BUILDER_H
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