mirror of https://github.com/CGAL/cgal
287 lines
8.2 KiB
C++
287 lines
8.2 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)
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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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// Mael Rouxel-Labbé
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#ifndef CGAL_BGL_IO_GOCAD_H
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#define CGAL_BGL_IO_GOCAD_H
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#include <CGAL/boost/graph/IO/Generic_facegraph_builder.h>
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#include <CGAL/assertions.h>
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#include <CGAL/boost/graph/iterator.h>
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#include <boost/container/flat_map.hpp>
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#include <fstream>
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#include <iostream>
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namespace CGAL {
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////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Read
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namespace IO {
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namespace internal {
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// Use CRTP to gain access to the protected members without getters/setters.
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template <typename FaceGraph, typename Point>
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class GOCAD_builder
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: public Generic_facegraph_builder<FaceGraph, Point, GOCAD_builder<FaceGraph, Point> >
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{
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typedef GOCAD_builder<FaceGraph, Point> Self;
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typedef Generic_facegraph_builder<FaceGraph, Point, Self> Base;
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typedef typename Base::Point_container Point_container;
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typedef typename Base::Face Face;
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typedef typename Base::Face_container Face_container;
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public:
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GOCAD_builder(std::istream& is_) : Base(is_) { }
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bool read(std::istream& input,
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Point_container& points,
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Face_container& faces)
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{
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int offset = 0;
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char c;
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std::string s, tface("TFACE");
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int i,j,k;
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Point p;
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bool vertices_read = false;
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while(input >> s)
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{
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if(s == tface)
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break;
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std::string::size_type idx;
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if((idx = s.find("name")) != std::string::npos)
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{
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std::istringstream str(s.substr(idx + 5));
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str >> this->name;
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}
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if((idx = s.find("color")) != std::string::npos)
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{
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std::istringstream str(s.substr(idx + 6));
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str >> this->color;
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}
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}
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std::getline(input, s);
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while(input.get(c))
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{
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if((c == 'V') || (c == 'P'))
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{
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input >> s >> i >> p; // @fixme check for failure
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if(!vertices_read)
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{
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vertices_read = true;
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offset -= i; // Some files start with index 0 others with 1
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}
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points.push_back(p);
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}
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else if(vertices_read && (c == 'T'))
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{
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input >> c >> c >> c >> i >> j >> k;
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typename Base::Face new_face(3);
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new_face[0] = offset+i;
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new_face[1] = offset+j;
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new_face[2] = offset+k;
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faces.push_back(new_face);
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}
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else if(c == 'E')
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{
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break;
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}
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std::getline(input, s);
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}
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return true;
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}
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};
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} // namespace internal
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} // namespace IO
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/*!
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\ingroup PkgBGLIOFct
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reads the graph `g` from data in the TS format.
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`name` and `color` will be filled according to the values contained in the file.
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\pre The data must represent a 2-manifold
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\attention The graph `g` is not cleared, and the data from the stream are added.
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\see \ref IOStreamGocad
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*/
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_GOCAD(std::istream& in,
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std::string& name,
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std::string& color,
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FaceGraph& g,
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const CGAL_BGL_NP_CLASS& np)
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{
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typedef typename CGAL::GetVertexPointMap<FaceGraph, CGAL_BGL_NP_CLASS>::type VPM;
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typedef typename boost::property_traits<VPM>::value_type Point;
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IO::internal::GOCAD_builder<FaceGraph, Point> builder(in);
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if(!builder(g, np))
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return false;
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name = builder.name;
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color = builder.color;
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return g.is_valid(); // @fixme keep validity check?
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}
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/*!
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\ingroup PkgBGLIOFct
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reads the graph `g` from data in the TS format.
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\sa Overloads of this function for specific models of the concept `FaceGraph`.
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\pre The data must represent a 2-manifold
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\see \ref IOStreamGOCAD
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*/
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_GOCAD(const char* fname, FaceGraph& g, const CGAL_BGL_NP_CLASS& np)
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{
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std::ifstream in(fname);
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std::string unused_name;
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std::string unused_color;
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return read_GOCAD(in, unused_name, unused_color, g, np);
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}
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool read_GOCAD(const std::string& fname, FaceGraph& g, CGAL_BGL_NP_CLASS np)
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{
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return read_GOCAD(fname.c_str(), g, np);
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}
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template <typename FaceGraph>
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bool read_GOCAD(std::istream& is, FaceGraph& g) { return read_GOCAD(is, g, parameters::all_default()); }
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template <typename FaceGraph>
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bool read_GOCAD(const char* fname, FaceGraph& g) { return read_GOCAD(fname, g, parameters::all_default()); }
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template <typename FaceGraph>
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bool read_GOCAD(const std::string& fname, FaceGraph& g) { return read_GOCAD(fname, g, parameters::all_default()); }
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////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Write
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/*!
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\ingroup PkgBGLIOFct
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writes the graph `g` in the TS format into `os`. `fname` is the
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mandatory name that will be assigned to `g`in the file.
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\see \ref IOStreamGocad
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*/
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_GOCAD(std::ostream& os,
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const char* fname,
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const FaceGraph& g,
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const CGAL_BGL_NP_CLASS& np)
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{
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typedef typename boost::graph_traits<FaceGraph>::vertex_descriptor vertex_descriptor;
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typedef typename boost::graph_traits<FaceGraph>::halfedge_descriptor halfedge_descriptor;
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typedef typename boost::graph_traits<FaceGraph>::face_descriptor face_descriptor;
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typedef typename boost::graph_traits<FaceGraph>::vertices_size_type vertices_size_type;
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using parameters::choose_parameter;
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using parameters::get_parameter;
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typename CGAL::GetVertexPointMap<FaceGraph, CGAL_BGL_NP_CLASS>::const_type
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vpm = choose_parameter(get_parameter(np, internal_np::vertex_point),
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get_const_property_map(CGAL::vertex_point, g));
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if(!os.good())
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return false;
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os << "GOCAD TSurf 1\n"
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"HEADER {\n"
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"name:";
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os << fname << std::endl;
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os << "*border:on\n"
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"*border*bstone:on\n"
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"}\n"
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"GOCAD_ORIGINAL_COORDINATE_SYSTEM\n"
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"NAME Default\n"
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"AXIS_NAME \"X\" \"Y\" \"Z\"\n"
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"AXIS_UNIT \"m\" \"m\" \"m\"\n"
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"ZPOSITIVE Elevation\n"
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"END_ORIGINAL_COORDINATE_SYSTEM\n"
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"TFACE\n";
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os.precision(16);
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boost::container::flat_map<vertex_descriptor, vertices_size_type> reindex;
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vertices_size_type i = 0;
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for(const vertex_descriptor v : vertices(g))
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{
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os << "VRTX " << i << " " << get(vpm, v) << "\n";
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reindex[v] = i++;
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}
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for(const face_descriptor f : faces(g))
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{
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halfedge_descriptor h = halfedge(f, g);
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os << "TRGL " << reindex[target(prev(h, g), g)] << " "
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<< reindex[target(h, g)] << " "
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<< reindex[target(next(h, g), g)] << "\n";
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}
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os << "END" << std::endl;
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return os.good();
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}
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/*!
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\ingroup PkgBGLIOFct
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writes the graph `g` in the TS format into a file named `fname`.
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\sa Overloads of this function for specific models of the concept `FaceGraph`.
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\see \ref IOStreamGOCAD
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*/
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_GOCAD(const char* fname,
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const FaceGraph& g,
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const CGAL_BGL_NP_CLASS& np)
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{
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std::ofstream out(fname);
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return write_GOCAD(out, fname, g, np);
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}
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template <typename FaceGraph, typename CGAL_BGL_NP_TEMPLATE_PARAMETERS>
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bool write_GOCAD(const std::string& fname, const FaceGraph& g, const CGAL_BGL_NP_CLASS& np)
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{
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return write_GOCAD(fname.c_str(), g, np);
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}
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template <typename FaceGraph>
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bool write_GOCAD(const char* fname, const FaceGraph& g) { return write_GOCAD(fname, g, parameters::all_default()); }
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template <typename FaceGraph>
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bool write_GOCAD(const std::string& fname, const FaceGraph& g) { return write_GOCAD(fname, g, parameters::all_default()); }
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} // namespace CGAL
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#endif // CGAL_BGL_IO_GOCAD_H
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