mirror of https://github.com/CGAL/cgal
123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
// Copyright (c) 2000 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org).
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// You can redistribute it and/or modify it under the terms of the GNU
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// General Public License as published by the Free Software Foundation,
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// either version 3 of the License, 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) : Sylvain Pion
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#ifndef CGAL_IO_TRIANGULATION_GEOMVIEW_OSTREAM_2_H
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#define CGAL_IO_TRIANGULATION_GEOMVIEW_OSTREAM_2_H
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#include <CGAL/license/Triangulation_2.h>
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#include <CGAL/IO/Geomview_stream.h>
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#include <CGAL/Triangulation_2.h>
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namespace CGAL {
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// There are 2 drawing functions for triangulations : depending on the wired
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// mode of the Geomview_stream, we draw either the edges or the faces.
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// TODO :
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// - Check the correctness when dimension < 2.
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// - Use the current stream color instead of built-in constant.
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template < class GT, class TDS >
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void
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show_triangulation_edges(Geomview_stream &gv, const Triangulation_2<GT,TDS> &T)
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{
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// Header.
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gv.set_ascii_mode();
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gv << "(geometry " << gv.get_new_id("triangulationedge")
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<< " {appearance {}{ SKEL \n"
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<< T.number_of_vertices()
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<< T.number_of_vertices() + T.number_of_faces()-1 << "\n";
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// Finite vertices coordinates.
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std::map<typename Triangulation_2<GT, TDS>::Vertex_handle, int> V;
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int inum = 0;
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for( typename Triangulation_2<GT, TDS>::Vertex_iterator
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vit = T.vertices_begin(); vit != T.vertices_end(); ++vit) {
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V[vit] = inum++;
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gv << vit->point() << "\n";
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}
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// Finite edges indices.
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for( typename Triangulation_2<GT, TDS>::Edge_iterator
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eit = T.edges_begin(); eit != T.edges_end(); ++eit) {
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gv << 2
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<< V[(*eit).first->vertex(T.ccw((*eit).second))]
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<< V[(*eit).first->vertex(T. cw((*eit).second))]
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<< "\n"; // without color.
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// << 4 << drand48() << drand48() << drand48() << 1.0; // random color
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}
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}
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template < class GT, class TDS >
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void
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show_triangulation_faces(Geomview_stream &gv, const Triangulation_2<GT,TDS> &T)
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{
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// Header.
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gv.set_binary_mode();
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gv << "(geometry " << gv.get_new_id("triangulation")
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<< " {appearance {}{ OFF BINARY\n"
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<< T.number_of_vertices() << T.number_of_faces() << 0;
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// Finite vertices coordinates.
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std::map<typename Triangulation_2<GT, TDS>::Vertex_handle, int> V;
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int inum = 0;
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for( typename Triangulation_2<GT, TDS>::Vertex_iterator
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vit = T.vertices_begin(); vit != T.vertices_end(); ++vit) {
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V[vit] = inum++;
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gv << vit->point();
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}
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// Finite faces indices.
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for( typename Triangulation_2<GT, TDS>::Face_iterator
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fit = T.faces_begin(); fit != T.faces_end(); ++fit) {
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gv << 3;
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for (int i=0; i<3; i++)
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gv << V[fit->vertex(i)];
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gv << 0; // without color.
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// gv << 4 << drand48() << drand48() << drand48() << 1.0; // random color
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}
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}
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template < class GT, class TDS >
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Geomview_stream&
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operator<<( Geomview_stream &gv, const Triangulation_2<GT,TDS> &T)
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{
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bool ascii_bak = gv.get_ascii_mode();
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bool raw_bak = gv.set_raw(true);
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if (gv.get_wired())
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show_triangulation_edges(gv, T);
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else
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show_triangulation_faces(gv, T);
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// Footer.
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gv << "}})";
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gv.set_raw(raw_bak);
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gv.set_ascii_mode(ascii_bak);
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return gv;
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}
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} //namespace CGAL
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#endif // CGAL_IO_TRIANGULATION_GEOMVIEW_OSTREAM_2_H
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