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/* high level interface for MshSaver*/
/* Copyright (C) 2020 Vladimir Fonov <vladimir.fonov@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 "writeMSH.h"
#include "MshSaver.h"
#include "MshLoader.h"
#include <iostream>
namespace igl {
namespace internal {
// helper function, appends contents of Eigen matrix to an std::vector, in RowMajor fashion
template <typename T, typename Derived>
void append_mat_to_vec(std::vector<T> &vec, const Eigen::PlainObjectBase<Derived> & mat)
{
size_t st = vec.size();
vec.resize(st + mat.size());
Eigen::Map< Eigen::Matrix<typename Derived::Scalar, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor> >
_map_vec( reinterpret_cast<T *>( vec.data() + st ), mat.rows(), mat.cols() );
_map_vec = mat;
}
}
}
IGL_INLINE bool igl::writeMSH(
const std::string &msh,
const Eigen::MatrixXd &X,
const Eigen::MatrixXi &Tri,
const Eigen::MatrixXi &Tet,
const Eigen::MatrixXi &TriTag,
const Eigen::MatrixXi &TetTag,
const std::vector<std::string> &XFields,
const std::vector<Eigen::MatrixXd> &XF,
const std::vector<std::string> &EFields,
const std::vector<Eigen::MatrixXd> &TriF,
const std::vector<Eigen::MatrixXd> &TetF
)
{
using namespace internal;
try
{
// error checks
if(!XFields.empty())
{
if(XFields.size()!=XF.size())
throw std::invalid_argument("Vertex field count mismatch");
for(int i=0;i<XFields.size();++i)
if(XF[i].rows()!=X.rows())
throw std::invalid_argument("Vertex field size mismatch");
}
if(!EFields.empty())
{
if(EFields.size()!=TriF.size())
throw std::invalid_argument("Triangle field count mismatch");
if(EFields.size()!=TetF.size())
throw std::invalid_argument("Tetrahedra field count mismatch");
for(int i=0;i<EFields.size();++i)
{
if(TriF[i].rows()!=Tri.rows())
throw std::invalid_argument("Triangle field size mismatch");
if(TetF[i].rows()!=Tet.rows())
throw std::invalid_argument("Tetrahedra field size mismatch");
}
}
// this is not the most optimal , it would be faster to modify RRMshSaver to work with Eiged data types
std::vector<double> _X;
append_mat_to_vec(_X, X);
std::vector<int> _Tri_Tet;
append_mat_to_vec( _Tri_Tet, Tri);
append_mat_to_vec( _Tri_Tet, Tet);
std::vector<int> _Tri_Tet_len(Tri.rows(), 3); //each is 3 elements long
_Tri_Tet_len.insert(_Tri_Tet_len.end(), Tet.rows(), 4);
std::vector<int> _Tri_Tet_type(Tri.rows(), MshLoader::ELEMENT_TRI);
_Tri_Tet_type.insert(_Tri_Tet_type.end(), Tet.rows(), MshLoader::ELEMENT_TET);
std::vector<int> _Tri_Tet_tag;
append_mat_to_vec(_Tri_Tet_tag, TriTag);
append_mat_to_vec(_Tri_Tet_tag, TetTag);
igl::MshSaver msh_saver(msh, true);
msh_saver.save_mesh( _X,
_Tri_Tet,
_Tri_Tet_len,
_Tri_Tet_type,
_Tri_Tet_tag);
// append vertex data
for(size_t i=0;i<XFields.size();++i)
{
assert(X.rows()==XF[i].rows());
std::vector<double> _XF;
append_mat_to_vec(_XF, XF[i]);
if(XF[i].cols() == 1)
msh_saver.save_scalar_field(XFields[i], _XF );
else if(XF[i].cols() == 3)
msh_saver.save_vector_field(XFields[i], _XF );
else
{
throw std::invalid_argument("unsupported vertex field dimensionality");
}
}
// append node data
for(size_t i=0; i<EFields.size(); ++i)
{
assert(TriF[i].cols() == TetF[i].cols());
assert(TriF[i].rows() == Tri.rows());
assert(TetF[i].rows() == Tet.rows());
std::vector<double> _EF;
append_mat_to_vec(_EF, TriF[i]);
append_mat_to_vec(_EF, TetF[i]);
assert(_EF.size() == (TriF[i].size()+TetF[i].size()));
if( TriF[i].cols() == 1 )
msh_saver.save_elem_scalar_field(EFields[i], _EF );
else if( TriF[i].cols() == 3 )
msh_saver.save_elem_vector_field(EFields[i], _EF );
else
{
throw std::invalid_argument("unsupported node field dimensionality");
}
}
} catch(const std::exception& e) {
std::cerr << e.what() << std::endl;
return false;
}
return true;
}
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