mirror of https://github.com/CGAL/cgal
280 lines
9.2 KiB
C++
280 lines
9.2 KiB
C++
// Copyright (c) 2018 GeometryFactory (France).
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// Copyright (c) 2004-2006 INRIA Sophia-Antipolis (France).
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// Copyright (c) 2009 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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// SPDX-License-Identifier: GPL-3.0+
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//
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// Author(s) : Laurent RINEAU, Stephane Tayeb, Maxime Gimeno
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#ifndef CGAL_VTP_IO_H
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#define CGAL_VTP_IO_H
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#include <CGAL/license/Polyhedron.h>
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#include <CGAL/Polygon_mesh_processing/internal/named_function_params.h>
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#include <CGAL/Polygon_mesh_processing/internal/named_params_helper.h>
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#include <CGAL/IO/write_vtk.h>
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//todo try to factorize with functors
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namespace CGAL{
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// writes the polys appended data at the end of the .vtp file
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template <class Mesh,
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typename NamedParameters>
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void
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write_polys(std::ostream& os,
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const Mesh & mesh,
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const NamedParameters& np)
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{
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typedef typename boost::graph_traits<Mesh>::vertex_descriptor vertex_descriptor;
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typedef typename boost::graph_traits<Mesh>::face_iterator face_iterator;
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typedef typename CGAL::Polygon_mesh_processing::GetVertexIndexMap<Mesh, NamedParameters>::type Vimap;
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Vimap V = choose_param(get_param(np, CGAL::internal_np::vertex_index),
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get_const_property_map(CGAL::internal_np::vertex_index, mesh));
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std::vector<std::size_t> connectivity_table;
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std::vector<std::size_t> offsets;
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std::vector<unsigned char> cell_type(num_faces(mesh),5); // triangle == 5
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std::size_t off = 0;
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for( face_iterator fit = faces(mesh).begin() ;
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fit != faces(mesh).end() ;
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++fit )
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{
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off += 3;
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offsets.push_back(off);
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BOOST_FOREACH(vertex_descriptor v,
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vertices_around_face(halfedge(*fit, mesh), mesh))
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connectivity_table.push_back(V[v]);
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}
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write_vector<std::size_t>(os,connectivity_table);
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write_vector<std::size_t>(os,offsets);
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write_vector<unsigned char>(os,cell_type);
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}
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//todo use named params for maps
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template <class Mesh,
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typename NamedParameters>
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void
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write_polys_tag(std::ostream& os,
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const Mesh & mesh,
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bool binary,
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std::size_t& offset,
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const NamedParameters& np)
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{
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typedef typename boost::graph_traits<Mesh>::vertex_descriptor vertex_descriptor;
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typedef typename boost::graph_traits<Mesh>::face_iterator face_iterator;
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typedef typename CGAL::Polygon_mesh_processing::GetVertexIndexMap<Mesh, NamedParameters>::type Vimap;
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Vimap V = choose_param(get_param(np, CGAL::internal_np::vertex_index),
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get_const_property_map(CGAL::internal_np::vertex_index, mesh));
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std::string formatattribute =
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binary ? " format=\"appended\"" : " format=\"ascii\"";
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std::string typeattribute;
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switch(sizeof(std::size_t)) {
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case 8: typeattribute = " type=\"UInt64\""; break;
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case 4: typeattribute = " type=\"UInt32\""; break;
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default: CGAL_error_msg("Unknown size of std::size_t");
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}
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// Write connectivity table
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os << " <Polys>\n"
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<< " <DataArray Name=\"connectivity\""
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<< formatattribute << typeattribute;
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if (binary) { // if binary output, just write the xml tag
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os << " offset=\"" << offset << "\"/>\n";
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offset += (3 * num_faces(mesh)+ 1) * sizeof(std::size_t);
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// 3 indices (size_t) per triangle + length of the encoded data (size_t)
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}
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else {
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os << "\">\n";
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for( face_iterator fit = faces(mesh).begin() ;
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fit != faces(mesh).end() ;
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++fit )
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{
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BOOST_FOREACH(vertex_descriptor v,
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vertices_around_face(halfedge(*fit, mesh), mesh))
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os << V[v] << " ";
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}
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os << " </DataArray>\n";
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}
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// Write offsets
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os << " <DataArray Name=\"offsets\""
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<< formatattribute << typeattribute;
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if (binary) { // if binary output, just write the xml tag
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os << " offset=\"" << offset << "\"/>\n";
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offset += (num_faces(mesh) + 1) * sizeof(std::size_t);
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// 1 offset (size_t) per triangle + length of the encoded data (size_t)
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}
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else {
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os << "\">\n";
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std::size_t polys_offset = 0;
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for( face_iterator fit = faces(mesh).begin() ;
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fit != faces(mesh).end() ;
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++fit )
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{
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polys_offset += 3;
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os << polys_offset << " ";
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}
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os << " </DataArray>\n";
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}
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// Write cell type (triangle == 5)
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os << " <DataArray Name=\"types\""
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<< formatattribute << " type=\"UInt8\"";
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if (binary) {
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os << " offset=\"" << offset << "\"/>\n";
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offset += num_faces(mesh) + sizeof(std::size_t);
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// 1 unsigned char per cell + length of the encoded data (size_t)
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}
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else {
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os << "\">\n";
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for(std::size_t i = 0; i< num_faces(mesh); ++i)
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os << "5 ";
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os << " </DataArray>\n";
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}
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os << " </Polys>\n";
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}
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//todo : use namedparams for points and ids
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//overload for facegraph
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template <class Mesh,
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typename NamedParameters>
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void
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write_points_tag(std::ostream& os,
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const Mesh & mesh,
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bool binary,
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std::size_t& offset,
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const NamedParameters& np)
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{
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typedef typename boost::graph_traits<Mesh>::vertex_iterator vertex_iterator;
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typedef typename CGAL::Polygon_mesh_processing::GetVertexPointMap<Mesh, NamedParameters>::const_type Vpmap;
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Vpmap vpm = choose_param(get_param(np, CGAL::vertex_point),
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get_const_property_map(CGAL::vertex_point, mesh));
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typedef typename boost::property_traits<Vpmap>::value_type Point_t;
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typedef typename CGAL::Kernel_traits<Point_t>::Kernel Gt;
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typedef typename Gt::FT FT;
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std::string format = binary ? "appended" : "ascii";
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std::string type = (sizeof(FT) == 8) ? "Float64" : "Float32";
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os << " <Points>\n"
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<< " <DataArray type =\"" << type << "\" NumberOfComponents=\"3\" format=\""
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<< format;
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if (binary) {
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os << "\" offset=\"" << offset << "\"/>\n";
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offset += 3 * num_vertices(mesh) * sizeof(FT) + sizeof(std::size_t);
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// 3 coords per points + length of the encoded data (size_t)
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}
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else {
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os << "\">\n";
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for( vertex_iterator vit = vertices(mesh).begin();
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vit != vertices(mesh).end();
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++vit)
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{
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os << get(vpm, *vit).x() << " " << get(vpm, *vit).y() << " "
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<< get(vpm, *vit).z() << " ";
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}
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os << " </DataArray>\n";
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}
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os << " </Points>\n";
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}
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// writes the points appended data at the end of the .vtp file
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template <class Mesh,
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class NamedParameters>
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void
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write_polys_points(std::ostream& os,
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const Mesh & mesh,
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const NamedParameters& np)
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{
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typedef typename boost::graph_traits<Mesh>::vertex_iterator vertex_iterator;
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typedef typename CGAL::Polygon_mesh_processing::GetVertexPointMap<Mesh, NamedParameters>::const_type Vpmap;
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Vpmap vpm = choose_param(get_param(np, CGAL::vertex_point),
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get_const_property_map(CGAL::vertex_point, mesh));
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typedef typename boost::property_traits<Vpmap>::value_type Point_t;
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typedef typename CGAL::Kernel_traits<Point_t>::Kernel Gt;
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typedef typename Gt::FT FT;
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std::vector<FT> coordinates;
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for( vertex_iterator vit = vertices(mesh).begin();
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vit != vertices(mesh).end();
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++vit)
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{
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coordinates.push_back(get(vpm, *vit).x());
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coordinates.push_back(get(vpm, *vit).y());
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coordinates.push_back(get(vpm, *vit).z());
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}
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write_vector<FT>(os,coordinates);
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}
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//public API
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template<class TriangleMesh,
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class NamedParameters>
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void write_VTP(std::ostream& os,
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const TriangleMesh& mesh,
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bool binary,
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const NamedParameters& np)
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{
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os << "<?xml version=\"1.0\"?>\n"
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<< "<VTKFile type=\"PolyData\" version=\"0.1\"";
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#ifdef CGAL_LITTLE_ENDIAN
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os << " byte_order=\"LittleEndian\"";
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#else // CGAL_BIG_ENDIAN
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os << " byte_order=\"BigEndian\"";
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#endif
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switch(sizeof(std::size_t)) {
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case 4: os << " header_type=\"UInt32\""; break;
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case 8: os << " header_type=\"UInt64\""; break;
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default: CGAL_error_msg("Unknown size of std::size_t");
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}
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os << ">\n"
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<< " <PolyData>" << "\n";
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os << " <Piece NumberOfPoints=\"" << num_vertices(mesh)
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<< "\" NumberOfPolys=\"" << num_faces(mesh) << "\">\n";
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std::size_t offset = 0;
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write_points_tag(os,mesh,binary,offset, np);
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write_polys_tag(os,mesh,binary,offset, np);
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os << " </Piece>\n"
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<< " </PolyData>\n";
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if (binary) {
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os << "<AppendedData encoding=\"raw\">\n_";
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write_polys_points(os,mesh, np);
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write_polys(os,mesh, np);
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}
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os << "</VTKFile>\n";
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}
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template<class TriangleMesh>
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void write_VTP(std::ostream& os,
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const TriangleMesh& mesh,
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bool binary = true)
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{
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write_VTP(os, mesh, binary, CGAL::parameters::all_default());
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}
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} //end CGAL
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#endif // CGAL_VTP_IO_H
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