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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#include "writeMESH.h"
#include "verbose.h"
#include "list_to_matrix.h"
#include <Eigen/Core>
#include <iostream>
#include <fstream>
#include <cstdio>
template <typename Scalar, typename Index>
IGL_INLINE bool igl::writeMESH(
const std::string mesh_file_name,
const std::vector<std::vector<Scalar > > & V,
const std::vector<std::vector<Index > > & T,
const std::vector<std::vector<Index > > & F)
{
Eigen::MatrixXd mV;
Eigen::MatrixXi mT,mF;
bool is_rect;
is_rect = list_to_matrix(V,mV);
if(!is_rect)
{
return false;
}
is_rect = list_to_matrix(T,mT);
if(!is_rect)
{
return false;
}
is_rect = list_to_matrix(F,mF);
if(!is_rect)
{
return false;
}
return igl::writeMESH(mesh_file_name,mV,mT,mF);
}
template <typename DerivedV, typename DerivedT, typename DerivedF>
IGL_INLINE bool igl::writeMESH(
const std::string str,
const Eigen::PlainObjectBase<DerivedV> & V,
const Eigen::PlainObjectBase<DerivedT> & T,
const Eigen::PlainObjectBase<DerivedF> & F)
{
using namespace std;
using namespace Eigen;
//// This is (surprisingly) slower than the C-ish code below
//ofstream mesh_file;
//mesh_file.open(str.c_str());
//if(!mesh_file.is_open())
//{
// cerr<<"IOError: "<<str<<" could not be opened..."<<endl;
// return false;
//}
//IOFormat format(FullPrecision,DontAlignCols," ","\n",""," 1","","");
//mesh_file<<"MeshVersionFormatted 1\n";
//mesh_file<<"Dimension 3\n";
//mesh_file<<"Vertices\n";
//mesh_file<<V.rows()<<"\n";
//mesh_file<<V.format(format)<<"\n";
//mesh_file<<"Triangles\n";
//mesh_file<<F.rows()<<"\n";
//mesh_file<<(F.array()+1).eval().format(format)<<"\n";
//mesh_file<<"Tetrahedra\n";
//mesh_file<<T.rows()<<"\n";
//mesh_file<<(T.array()+1).eval().format(format)<<"\n";
//mesh_file.close();
FILE * mesh_file = fopen(str.c_str(),"w");
if(NULL==mesh_file)
{
fprintf(stderr,"IOError: %s could not be opened...",str.c_str());
return false;
}
// print header
fprintf(mesh_file,"MeshVersionFormatted 1\n");
fprintf(mesh_file,"Dimension 3\n");
// print tet vertices
fprintf(mesh_file,"Vertices\n");
// print number of tet vertices
int number_of_tet_vertices = V.rows();
fprintf(mesh_file,"%d\n",number_of_tet_vertices);
// loop over tet vertices
for(int i = 0;i<number_of_tet_vertices;i++)
{
// print position of ith tet vertex
fprintf(mesh_file,"%.17lg %.17lg %.17lg 1\n",
(double)V(i,0),
(double)V(i,1),
(double)V(i,2));
}
verbose("WARNING: save_mesh() assumes that vertices have"
" same indices in surface as volume...\n");
// print faces
fprintf(mesh_file,"Triangles\n");
// print number of triangles
int number_of_triangles = F.rows();
fprintf(mesh_file,"%d\n",number_of_triangles);
// loop over faces
for(int i = 0;i<number_of_triangles;i++)
{
// loop over vertices in face
fprintf(mesh_file,"%d %d %d 1\n",
(int)F(i,0)+1,
(int)F(i,1)+1,
(int)F(i,2)+1);
}
// print tetrahedra
fprintf(mesh_file,"Tetrahedra\n");
int number_of_tetrahedra = T.rows();
// print number of tetrahedra
fprintf(mesh_file,"%d\n",number_of_tetrahedra);
// loop over tetrahedra
for(int i = 0; i < number_of_tetrahedra;i++)
{
// mesh standard uses 1-based indexing
fprintf(mesh_file, "%d %d %d %d 1\n",
(int)T(i,0)+1,
(int)T(i,1)+1,
(int)T(i,2)+1,
(int)T(i,3)+1);
}
fclose(mesh_file);
return true;
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
// generated by autoexplicit.sh
template bool igl::writeMESH<Eigen::Matrix<double, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 3, 1, -1, 3> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 1, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> > const&);
// generated by autoexplicit.sh
template bool igl::writeMESH<Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 3, 1, -1, 3> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> > const&);
// generated by autoexplicit.sh
template bool igl::writeMESH<Eigen::Matrix<double, -1, 3, 0, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 3, 0, -1, 3> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, 3, 0, -1, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&);
// generated by autoexplicit.sh
template bool igl::writeMESH<Eigen::Matrix<double, 8, 3, 0, 8, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, 12, 3, 0, 12, 3> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, 8, 3, 0, 8, 3> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, 12, 3, 0, 12, 3> > const&);
//template bool igl::writeMESH<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&);
template bool igl::writeMESH<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&);
template bool igl::writeMESH<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&);
template bool igl::writeMESH<double, int>(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::vector<std::vector<double, std::allocator<double> >, std::allocator<std::vector<double, std::allocator<double> > > > const&, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > const&, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > > const&);
#endif
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