mirror of https://github.com/CGAL/cgal
159 lines
6.3 KiB
C++
159 lines
6.3 KiB
C++
// Copyright (c) 2015 GeometryFactory (France). All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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//
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// Author(s) : Andreas Fabri
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#ifndef CGAL_BOOST_GRAPH_COPY_FACE_GRAPH_H
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#define CGAL_BOOST_GRAPH_COPY_FACE_GRAPH_H
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#include <CGAL/config.h>
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#include <CGAL/iterator.h>
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#include <CGAL/Kernel_traits.h>
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#include <CGAL/Cartesian_converter.h>
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#include <CGAL/boost/graph/Euler_operations.h>
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#include <CGAL/boost/graph/iterator.h>
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#include <CGAL/boost/graph/helpers.h>
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#include <boost/unordered_map.hpp>
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namespace CGAL {
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/*!
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\ingroup PkgBGLHelperFct
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copies a source model of `FaceListGraph` into a target model of a
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`FaceListGraph`. `OutputIterators` can be provided to produce a
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mapping between source and target elements. The target graph is not
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cleared.
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\tparam SourceMesh a model of `FaceListGraph`
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\tparam TargetMesh a model of `FaceListGraph`
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\tparam V2V a model of `OutputIterator` accepting `std::pair<sm_vertex_descriptor, tm_vertex_descriptor>`
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\tparam H2H a model of `OutputIterator` accepting `std::pair<sm_halfedge_descriptor, tm_halfedge_descriptor>`
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\tparam F2F a model of `OutputIterator` accepting `std::pair<sm_face_descriptor, tm_face_descriptor>`
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where the prefix `sm_` and `tm_` mean belonging to the source and
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target mesh respectively.
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The types `sm_vertex_descriptor` and `sm_face_descriptor` must be models of the concept `Hashable`.
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\param sm the source mesh
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\param tm the target mesh
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\param v2v pairs of `vertex_descriptors` from `sm` and corresponding `vertex_descriptors` in `tm` are added to `v2v`
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\param h2h pairs of `halfedge_descriptors` from `sm` and corresponding `halfedge_descriptors` in `tm` are added to `h2h`
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\param f2f pairs of `face_descriptors` from `sm` and corresponding `face_descriptors` in `tm` are added to `f2f`
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This function assumes that both graphs have an internal property
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`vertex_point`. Values of that property are converted using
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`CGAL::Cartesian_converter<SourceKernel,
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TargetKernel>`. `SourceKernel` and `TargetKernel` are deduced using
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`CGAL::Kernel_traits`.
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Other properties are not copied.
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*/
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#if defined(CGAL_CXX11) || defined(DOXYGEN_RUNNING) // Use template default arguments
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template <typename SourceMesh, typename TargetMesh,
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typename V2V = Emptyset_iterator,
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typename H2H = Emptyset_iterator,
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typename F2F = Emptyset_iterator>
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void copy_face_graph(const SourceMesh& sm, TargetMesh& tm,
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V2V v2v = V2V(), H2H h2h = H2H(), F2F f2f = F2F())
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#else // use the overloads
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template <typename SourceMesh, typename TargetMesh,
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typename V2V, typename H2H, typename F2F>
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void copy_face_graph(const SourceMesh& sm, TargetMesh& tm,
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V2V v2v, H2H h2h, F2F f2f)
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#endif
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{
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typedef typename boost::graph_traits<SourceMesh>::vertex_descriptor sm_vertex_descriptor;
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typedef typename boost::graph_traits<TargetMesh>::vertex_descriptor tm_vertex_descriptor;
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typedef typename boost::graph_traits<SourceMesh>::face_descriptor sm_face_descriptor;
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typedef typename boost::graph_traits<TargetMesh>::face_descriptor tm_face_descriptor;
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typedef typename boost::graph_traits<SourceMesh>::halfedge_descriptor sm_halfedge_descriptor;
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typedef typename boost::graph_traits<TargetMesh>::halfedge_descriptor tm_halfedge_descriptor;
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typedef typename boost::property_map<SourceMesh, vertex_point_t>::const_type sm_PMap;
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typedef typename boost::property_map<TargetMesh, vertex_point_t>::type tm_PMap;
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Cartesian_converter<typename Kernel_traits<typename boost::property_traits<sm_PMap>::value_type>::type,
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typename Kernel_traits<typename boost::property_traits<tm_PMap>::value_type>::type >
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conv;
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sm_PMap sm_pmap = get(vertex_point, sm);
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tm_PMap tm_pmap = get(vertex_point, tm);
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// internal f2f and v2v
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boost::unordered_map<sm_vertex_descriptor, tm_vertex_descriptor> v2v_;
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boost::unordered_map<sm_face_descriptor, tm_face_descriptor> f2f_;
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BOOST_FOREACH(sm_vertex_descriptor svd, vertices(sm)){
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tm_vertex_descriptor tvd = add_vertex(tm);
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v2v_[svd] = tvd;
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*v2v++ = std::make_pair(svd, tvd);
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put(tm_pmap, tvd, conv(get(sm_pmap, svd)));
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}
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BOOST_FOREACH(sm_face_descriptor sfd, faces(sm)){
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std::vector<tm_vertex_descriptor> tv;
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BOOST_FOREACH(sm_vertex_descriptor svd, vertices_around_face(halfedge(sfd,sm),sm)){
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tv.push_back(v2v_.at(svd));
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}
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tm_face_descriptor new_face = Euler::add_face(tv,tm);
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f2f_[sfd] = new_face;
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*f2f++ = std::make_pair(sfd, new_face);
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}
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BOOST_FOREACH(sm_face_descriptor sfd, faces(sm)){
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sm_halfedge_descriptor shd = halfedge(sfd,sm), done(shd);
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tm_halfedge_descriptor thd = halfedge(f2f_[sfd],tm);
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tm_vertex_descriptor tvd = v2v_.at(target(shd,sm));
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while(target(thd,tm) != tvd){
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thd = next(thd,tm);
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}
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do {
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*h2h++ = std::make_pair(shd, thd);
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if (face(opposite(shd, sm), sm) == boost::graph_traits<SourceMesh>::null_face()){
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*h2h++ = std::make_pair(opposite(shd, sm), opposite(thd, tm));
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}
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shd = next(shd,sm);
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thd = next(thd,tm);
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}while(shd != done);
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}
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}
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#if !defined(CGAL_CXX11) && !defined(DOXYGEN_RUNNING)
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template <typename SourceMesh, typename TargetMesh>
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void copy_face_graph(const SourceMesh& sm, TargetMesh& tm)
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{ copy_face_graph(sm, tm, Emptyset_iterator(), Emptyset_iterator(), Emptyset_iterator()); }
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template <typename SourceMesh, typename TargetMesh, typename V2V>
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void copy_face_graph(const SourceMesh& sm, TargetMesh& tm, V2V v2v)
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{ copy_face_graph(sm, tm, v2v, Emptyset_iterator(), Emptyset_iterator()); }
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template <typename SourceMesh, typename TargetMesh, typename V2V, typename H2H>
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void copy_face_graph(const SourceMesh& sm, TargetMesh& tm, V2V v2v, H2H h2h)
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{ copy_face_graph(sm, tm, v2v, h2h, Emptyset_iterator()); }
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#endif
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} // namespace CGAL
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#endif // CGAL_BOOST_GRAPH_COPY_FACE_GRAPH_H
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