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mesh_io_msh.cc
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/**
* @file mesh_io_msh.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Fri Jul 04 2014
*
* @brief Read/Write for MSH files generated by gmsh
*
* @section LICENSE
*
* Copyright (©) 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -----------------------------------------------------------------------------
Version (Legacy) 1.0
$NOD
number-of-nodes
node-number x-coord y-coord z-coord
...
$ENDNOD
$ELM
number-of-elements
elm-number elm-type reg-phys reg-elem number-of-nodes node-number-list
...
$ENDELM
-----------------------------------------------------------------------------
Version 2.1
$MeshFormat
version-number file-type data-size
$EndMeshFormat
$Nodes
number-of-nodes
node-number x-coord y-coord z-coord
...
$EndNodes
$Elements
number-of-elements
elm-number elm-type number-of-tags < tag > ... node-number-list
...
$EndElements
$PhysicalNames
number-of-names
physical-dimension physical-number "physical-name"
...
$EndPhysicalNames
$NodeData
number-of-string-tags
< "string-tag" >
...
number-of-real-tags
< real-tag >
...
number-of-integer-tags
< integer-tag >
...
node-number value ...
...
$EndNodeData
$ElementData
number-of-string-tags
< "string-tag" >
...
number-of-real-tags
< real-tag >
...
number-of-integer-tags
< integer-tag >
...
elm-number value ...
...
$EndElementData
$ElementNodeData
number-of-string-tags
< "string-tag" >
...
number-of-real-tags
< real-tag >
...
number-of-integer-tags
< integer-tag >
...
elm-number number-of-nodes-per-element value ...
...
$ElementEndNodeData
-----------------------------------------------------------------------------
elem-type
1: 2-node line.
2: 3-node triangle.
3: 4-node quadrangle.
4: 4-node tetrahedron.
5: 8-node hexahedron.
6: 6-node prism.
7: 5-node pyramid.
8: 3-node second order line
9: 6-node second order triangle
10: 9-node second order quadrangle
11: 10-node second order tetrahedron
12: 27-node second order hexahedron
13: 18-node second order prism
14: 14-node second order pyramid
15: 1-node point.
16: 8-node second order quadrangle
17: 20-node second order hexahedron
18: 15-node second order prism
19: 13-node second order pyramid
20: 9-node third order incomplete triangle
21: 10-node third order triangle
22: 12-node fourth order incomplete triangle
23: 15-node fourth order triangle
24: 15-node fifth order incomplete triangle
25: 21-node fifth order complete triangle
26: 4-node third order edge
27: 5-node fourth order edge
28: 6-node fifth order edge
29: 20-node third order tetrahedron
30: 35-node fourth order tetrahedron
31: 56-node fifth order tetrahedron
-------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
#include <fstream>
/* -------------------------------------------------------------------------- */
#include "mesh_io.hh"
#include "mesh_utils.hh"
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
// The boost spirit is a work on the way it does not compile so I kept the
// current code. The current code does not handle files generated on Windows
// <CRLF>
// #include <boost/config/warning_disable.hpp>
// #include <boost/spirit/include/qi.hpp>
// #include <boost/spirit/include/phoenix_core.hpp>
// #include <boost/spirit/include/phoenix_fusion.hpp>
// #include <boost/spirit/include/phoenix_object.hpp>
// #include <boost/spirit/include/phoenix_container.hpp>
// #include <boost/spirit/include/phoenix_operator.hpp>
// #include <boost/spirit/include/phoenix_bind.hpp>
// #include <boost/spirit/include/phoenix_stl.hpp>
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
/* Methods Implentations */
/* -------------------------------------------------------------------------- */
MeshIOMSH::MeshIOMSH() {
canReadSurface = true;
canReadExtendedData = true;
_msh_nodes_per_elem[_msh_not_defined] = 0;
_msh_nodes_per_elem[_msh_segment_2] = 2;
_msh_nodes_per_elem[_msh_triangle_3] = 3;
_msh_nodes_per_elem[_msh_quadrangle_4] = 4;
_msh_nodes_per_elem[_msh_tetrahedron_4] = 4;
_msh_nodes_per_elem[_msh_hexahedron_8] = 8;
_msh_nodes_per_elem[_msh_prism_1] = 6;
_msh_nodes_per_elem[_msh_pyramid_1] = 1;
_msh_nodes_per_elem[_msh_segment_3] = 3;
_msh_nodes_per_elem[_msh_triangle_6] = 6;
_msh_nodes_per_elem[_msh_quadrangle_9] = 9;
_msh_nodes_per_elem[_msh_tetrahedron_10] = 10;
_msh_nodes_per_elem[_msh_hexahedron_27] = 27;
_msh_nodes_per_elem[_msh_hexahedron_20] = 20;
_msh_nodes_per_elem[_msh_prism_18] = 18;
_msh_nodes_per_elem[_msh_prism_15] = 15;
_msh_nodes_per_elem[_msh_pyramid_14] = 14;
_msh_nodes_per_elem[_msh_point] = 1;
_msh_nodes_per_elem[_msh_quadrangle_8] = 8;
_msh_to_akantu_element_types[_msh_not_defined] = _not_defined;
_msh_to_akantu_element_types[_msh_segment_2] = _segment_2;
_msh_to_akantu_element_types[_msh_triangle_3] = _triangle_3;
_msh_to_akantu_element_types[_msh_quadrangle_4] = _quadrangle_4;
_msh_to_akantu_element_types[_msh_tetrahedron_4] = _tetrahedron_4;
_msh_to_akantu_element_types[_msh_hexahedron_8] = _hexahedron_8;
_msh_to_akantu_element_types[_msh_prism_1] = _pentahedron_6;
_msh_to_akantu_element_types[_msh_pyramid_1] = _not_defined;
_msh_to_akantu_element_types[_msh_segment_3] = _segment_3;
_msh_to_akantu_element_types[_msh_triangle_6] = _triangle_6;
_msh_to_akantu_element_types[_msh_quadrangle_9] = _not_defined;
_msh_to_akantu_element_types[_msh_tetrahedron_10] = _tetrahedron_10;
_msh_to_akantu_element_types[_msh_hexahedron_27] = _not_defined;
_msh_to_akantu_element_types[_msh_hexahedron_20] = _hexahedron_20;
_msh_to_akantu_element_types[_msh_prism_18] = _not_defined;
_msh_to_akantu_element_types[_msh_prism_15] = _pentahedron_15;
_msh_to_akantu_element_types[_msh_pyramid_14] = _not_defined;
_msh_to_akantu_element_types[_msh_point] = _point_1;
_msh_to_akantu_element_types[_msh_quadrangle_8] = _quadrangle_8;
_akantu_to_msh_element_types[_not_defined] = _msh_not_defined;
_akantu_to_msh_element_types[_segment_2] = _msh_segment_2;
_akantu_to_msh_element_types[_segment_3] = _msh_segment_3;
_akantu_to_msh_element_types[_triangle_3] = _msh_triangle_3;
_akantu_to_msh_element_types[_triangle_6] = _msh_triangle_6;
_akantu_to_msh_element_types[_tetrahedron_4] = _msh_tetrahedron_4;
_akantu_to_msh_element_types[_tetrahedron_10] = _msh_tetrahedron_10;
_akantu_to_msh_element_types[_quadrangle_4] = _msh_quadrangle_4;
_akantu_to_msh_element_types[_quadrangle_8] = _msh_quadrangle_8;
_akantu_to_msh_element_types[_hexahedron_8] = _msh_hexahedron_8;
_akantu_to_msh_element_types[_hexahedron_20] = _msh_hexahedron_20;
_akantu_to_msh_element_types[_pentahedron_6] = _msh_prism_1;
_akantu_to_msh_element_types[_pentahedron_15] = _msh_prism_15;
_akantu_to_msh_element_types[_point_1] = _msh_point;
#if defined(AKANTU_STRUCTURAL_MECHANICS)
_akantu_to_msh_element_types[_bernoulli_beam_2] = _msh_segment_2;
_akantu_to_msh_element_types[_bernoulli_beam_3] = _msh_segment_2;
_akantu_to_msh_element_types[_kirchhoff_shell] = _msh_triangle_3;
#endif
std::map<ElementType, MSHElementType>::iterator it;
for (it = _akantu_to_msh_element_types.begin();
it != _akantu_to_msh_element_types.end(); ++it) {
UInt nb_nodes = _msh_nodes_per_elem[it->second];
std::vector<UInt> tmp(nb_nodes);
for (UInt i = 0; i < nb_nodes; ++i) {
tmp[i] = i;
}
switch (it->first) {
case _tetrahedron_10:
tmp[8] = 9;
tmp[9] = 8;
break;
case _pentahedron_6:
tmp[0] = 2;
tmp[1] = 0;
tmp[2] = 1;
tmp[3] = 5;
tmp[4] = 3;
tmp[5] = 4;
break;
case _pentahedron_15:
tmp[0] = 2;
tmp[1] = 0;
tmp[2] = 1;
tmp[3] = 5;
tmp[4] = 3;
tmp[5] = 4;
tmp[6] = 8;
tmp[8] = 11;
tmp[9] = 6;
tmp[10] = 9;
tmp[11] = 10;
tmp[12] = 14;
tmp[14] = 12;
break;
case _hexahedron_20:
tmp[9] = 11;
tmp[10] = 12;
tmp[11] = 9;
tmp[12] = 13;
tmp[13] = 10;
tmp[17] = 19;
tmp[18] = 17;
tmp[19] = 18;
break;
default:
// nothing to change
break;
}
_read_order[it->first] = tmp;
}
}
/* -------------------------------------------------------------------------- */
MeshIOMSH::~MeshIOMSH() {}
/* -------------------------------------------------------------------------- */
/* Spirit stuff */
/* -------------------------------------------------------------------------- */
// namespace _parser {
// namespace spirit = ::boost::spirit;
// namespace qi = ::boost::spirit::qi;
// namespace ascii = ::boost::spirit::ascii;
// namespace lbs = ::boost::spirit::qi::labels;
// namespace phx = ::boost::phoenix;
// /* ------------------------------------------------------------------------
// */
// /* Lazy functors */
// /* ------------------------------------------------------------------------
// */
// struct _Element {
// int index;
// std::vector<int> tags;
// std::vector<int> connectivity;
// ElementType type;
// };
// /* ------------------------------------------------------------------------
// */
// struct lazy_get_nb_nodes_ {
// template <class elem_type> struct result { typedef int type; };
// template <class elem_type> bool operator()(elem_type et) {
// return MeshIOMSH::_msh_nodes_per_elem[et];
// }
// };
// /* ------------------------------------------------------------------------
// */
// struct lazy_element_ {
// template <class id_t, class tags_t, class elem_type, class conn_t>
// struct result {
// typedef _Element type;
// };
// template <class id_t, class tags_t, class elem_type, class conn_t>
// _Element operator()(id_t id, const elem_type & et, const tags_t & t,
// const conn_t & c) {
// _Element tmp_el;
// tmp_el.index = id;
// tmp_el.tags = t;
// tmp_el.connectivity = c;
// tmp_el.type = et;
// return tmp_el;
// }
// };
// /* ------------------------------------------------------------------------
// */
// struct lazy_check_value_ {
// template <class T> struct result { typedef void type; };
// template <class T> void operator()(T v1, T v2) {
// if (v1 != v2) {
// AKANTU_EXCEPTION("The msh parser expected a "
// << v2 << " in the header bug got a " << v1);
// }
// }
// };
// /* ------------------------------------------------------------------------
// */
// struct lazy_node_read_ {
// template <class Mesh, class ID, class V, class size, class Map>
// struct result {
// typedef bool type;
// };
// template <class Mesh, class ID, class V, class size, class Map>
// bool operator()(Mesh & mesh, const ID & id, const V & pos, size max,
// Map & nodes_mapping) const {
// Vector<Real> tmp_pos(mesh.getSpatialDimension());
// UInt i = 0;
// for (typename V::const_iterator it = pos.begin();
// it != pos.end() || i < mesh.getSpatialDimension(); ++it)
// tmp_pos[i++] = *it;
// nodes_mapping[id] = mesh.getNbNodes();
// mesh.getNodes().push_back(tmp_pos);
// return (mesh.getNbNodes() < UInt(max));
// }
// };
// /* ------------------------------------------------------------------------
// */
// struct lazy_element_read_ {
// template <class Mesh, class EL, class size, class NodeMap, class ElemMap>
// struct result {
// typedef bool type;
// };
// template <class Mesh, class EL, class size, class NodeMap, class ElemMap>
// bool operator()(Mesh & mesh, const EL & element, size max,
// const NodeMap & nodes_mapping,
// ElemMap & elements_mapping) const {
// Vector<UInt> tmp_conn(Mesh::getNbNodesPerElement(element.type));
// AKANTU_DEBUG_ASSERT(element.connectivity.size() == tmp_conn.size(),
// "The element "
// << element.index
// << "in the MSH file has too many nodes.");
// mesh.addConnectivityType(element.type);
// Array<UInt> & connectivity = mesh.getConnectivity(element.type);
// UInt i = 0;
// for (std::vector<int>::const_iterator it =
// element.connectivity.begin();
// it != element.connectivity.end(); ++it) {
// typename NodeMap::const_iterator nit = nodes_mapping.find(*it);
// AKANTU_DEBUG_ASSERT(nit != nodes_mapping.end(),
// "There is an unknown node in the connectivity.");
// tmp_conn[i++] = nit->second;
// }
// ::akantu::Element el(element.type, connectivity.getSize());
// elements_mapping[element.index] = el;
// connectivity.push_back(tmp_conn);
// for (UInt i = 0; i < element.tags.size(); ++i) {
// std::stringstream tag_sstr;
// tag_sstr << "tag_" << i;
// Array<UInt> * data =
// mesh.template getDataPointer<UInt>(tag_sstr.str(), element.type,
// _not_ghost);
// data->push_back(element.tags[i]);
// }
// return (mesh.getNbElement() < UInt(max));
// }
// };
// /* ------------------------------------------------------------------------
// */
// template <class Iterator, typename Skipper = ascii::space_type>
// struct MshMeshGrammar : qi::grammar<Iterator, void(), Skipper> {
// public:
// MshMeshGrammar(Mesh & mesh)
// : MshMeshGrammar::base_type(start, "msh_mesh_reader"), mesh(mesh) {
// phx::function<lazy_element_> lazy_element;
// phx::function<lazy_get_nb_nodes_> lazy_get_nb_nodes;
// phx::function<lazy_check_value_> lazy_check_value;
// phx::function<lazy_node_read_> lazy_node_read;
// phx::function<lazy_element_read_> lazy_element_read;
// clang-format off
// start
// = *( known_section | unknown_section
// )
// ;
// known_section
// = qi::char_("$")
// >> sections [ lbs::_a = lbs::_1 ]
// >> qi::lazy(*lbs::_a)
// >> qi::lit("$End")
// //>> qi::lit(phx::ref(lbs::_a))
// ;
// unknown_section
// = qi::char_("$")
// >> qi::char_("") [ lbs::_a = lbs::_1 ]
// >> ignore_section
// >> qi::lit("$End")
// >> qi::lit(phx::val(lbs::_a))
// ;
// mesh_format // version followed by 0 or 1 for ascii or binary
// = version >> (
// ( qi::char_("0")
// >> qi::int_ [ lazy_check_value(lbs::_1, 8) ]
// )
// | ( qi::char_("1")
// >> qi::int_ [ lazy_check_value(lbs::_1, 8) ]
// >> qi::dword [ lazy_check_value(lbs::_1, 1) ]
// )
// )
// ;
// nodes
// = nodes_
// ;
// nodes_
// = qi::int_ [ lbs::_a = lbs::_1 ]
// > *(
// ( qi::int_ >> position ) [ lazy_node_read(phx::ref(mesh),
// lbs::_1,
// phx::cref(lbs::_2),
// lbs::_a,
// phx::ref(this->msh_nodes_to_akantu)) ]
// )
// ;
// element
// = elements_
// ;
// elements_
// = qi::int_ [ lbs::_a = lbs::_1 ]
// > qi::repeat(phx::ref(lbs::_a))[ element [ lazy_element_read(phx::ref(mesh),
// lbs::_1,
// phx::cref(lbs::_a),
// phx::cref(this->msh_nodes_to_akantu),
// phx::ref(this->msh_elemt_to_akantu)) ]]
// ;
// ignore_section
// = *(qi::char_ - qi::char_('$'))
// ;
// interpolation_scheme = ignore_section;
// element_data = ignore_section;
// node_data = ignore_section;
// version
// = qi::int_ [ phx::push_back(lbs::_val, lbs::_1) ]
// >> *( qi::char_(".") >> qi::int_ [ phx::push_back(lbs::_val, lbs::_1) ] )
// ;
// position
// = real [ phx::push_back(lbs::_val, lbs::_1) ]
// > real [ phx::push_back(lbs::_val, lbs::_1) ]
// > real [ phx::push_back(lbs::_val, lbs::_1) ]
// ;
// tags
// = qi::int_ [ lbs::_a = lbs::_1 ]
// > qi::repeat(phx::val(lbs::_a))[ qi::int_ [ phx::push_back(lbs::_val,
// lbs::_1) ] ]
// ;
// element
// = ( qi::int_ [ lbs::_a = lbs::_1 ]
// > msh_element_type [ lbs::_b = lazy_get_nb_nodes(lbs::_1) ]
// > tags [ lbs::_c = lbs::_1 ]
// > connectivity(lbs::_a) [ lbs::_d = lbs::_1 ]
// ) [ lbs::_val = lazy_element(lbs::_a,
// phx::cref(lbs::_b),
// phx::cref(lbs::_c),
// phx::cref(lbs::_d)) ]
// ;
// connectivity
// = qi::repeat(lbs::_r1)[ qi::int_ [ phx::push_back(lbs::_val,
// lbs::_1) ] ]
// ;
// sections.add
// ("MeshFormat", &mesh_format)
// ("Nodes", &nodes)
// ("Elements", &elements)
// ("PhysicalNames", &physical_names)
// ("InterpolationScheme", &interpolation_scheme)
// ("ElementData", &element_data)
// ("NodeData", &node_data);
// msh_element_type.add
// ("0" , _not_defined )
// ("1" , _segment_2 )
// ("2" , _triangle_3 )
// ("3" , _quadrangle_4 )
// ("4" , _tetrahedron_4 )
// ("5" , _hexahedron_8 )
// ("6" , _pentahedron_6 )
// ("7" , _not_defined )
// ("8" , _segment_3 )
// ("9" , _triangle_6 )
// ("10", _not_defined )
// ("11", _tetrahedron_10)
// ("12", _not_defined )
// ("13", _not_defined )
// ("14", _hexahedron_20 )
// ("15", _pentahedron_15)
// ("16", _not_defined )
// ("17", _point_1 )
// ("18", _quadrangle_8 );
// mesh_format .name("MeshFormat" );
// nodes .name("Nodes" );
// elements .name("Elements" );
// physical_names .name("PhysicalNames" );
// interpolation_scheme.name("InterpolationScheme");
// element_data .name("ElementData" );
// node_data .name("NodeData" );
// clang-format on
// }
// /* ----------------------------------------------------------------------
// */
// /* Rules */
// /* ----------------------------------------------------------------------
// */
// private:
// qi::symbols<char, ElementType> msh_element_type;
// qi::symbols<char, qi::rule<Iterator, void(), Skipper> *> sections;
// qi::rule<Iterator, void(), Skipper> start;
// qi::rule<Iterator, void(), Skipper, qi::locals<std::string> >
// unknown_section;
// qi::rule<Iterator, void(), Skipper, qi::locals<qi::rule<Iterator,
// Skipper> *> > known_section;
// qi::rule<Iterator, void(), Skipper> mesh_format, nodes, elements,
// physical_names, ignore_section,
// interpolation_scheme, element_data, node_data, any_line;
// qi::rule<Iterator, void(), Skipper, qi::locals<int> > nodes_;
// qi::rule<Iterator, void(), Skipper, qi::locals< int, int, vector<int>,
// vector<int> > > elements_;
// qi::rule<Iterator, std::vector<int>(), Skipper> version;
// qi::rule<Iterator, _Element(), Skipper, qi::locals<ElementType> >
// element;
// qi::rule<Iterator, std::vector<int>(), Skipper, qi::locals<int> > tags;
// qi::rule<Iterator, std::vector<int>(int), Skipper> connectivity;
// qi::rule<Iterator, std::vector<Real>(), Skipper> position;
// qi::real_parser<Real, qi::real_policies<Real> > real;
// /* ----------------------------------------------------------------------
// */
// /* Members */
// /* ----------------------------------------------------------------------
// */
// private:
// /// reference to the mesh to read
// Mesh & mesh;
// /// correspondance between the numbering of nodes in the abaqus file and
// in
// /// the akantu mesh
// std::map<UInt, UInt> msh_nodes_to_akantu;
// /// correspondance between the element number in the abaqus file and the
// /// Element in the akantu mesh
// std::map<UInt, Element> msh_elemt_to_akantu;
// };
// }
// /* --------------------------------------------------------------------------
// */
// void MeshIOAbaqus::read(const std::string& filename, Mesh& mesh) {
// namespace qi = boost::spirit::qi;
// namespace ascii = boost::spirit::ascii;
// std::ifstream infile;
// infile.open(filename.c_str());
// if(!infile.good()) {
// AKANTU_DEBUG_ERROR("Cannot open file " << filename);
// }
// std::string storage; // We will read the contents here.
// infile.unsetf(std::ios::skipws); // No white space skipping!
// std::copy(std::istream_iterator<char>(infile),
// std::istream_iterator<char>(),
// std::back_inserter(storage));
// typedef std::string::const_iterator iterator_t;
// typedef ascii::space_type skipper;
// typedef _parser::MshMeshGrammar<iterator_t, skipper> grammar;
// grammar g(mesh);
// skipper ws;
// iterator_t iter = storage.begin();
// iterator_t end = storage.end();
// qi::phrase_parse(iter, end, g, ws);
// this->setNbGlobalNodes(mesh, mesh.getNodes().getSize());
// MeshUtils::fillElementToSubElementsData(mesh);
// }
static void my_getline(std::ifstream & infile, std::string & str) {
std::string tmp_str;
std::getline(infile, tmp_str);
str = trim(tmp_str);
}
/* -------------------------------------------------------------------------- */
void MeshIOMSH::read(const std::string & filename, Mesh & mesh) {
std::ifstream infile;
infile.open(filename.c_str());
std::string line;
UInt first_node_number = std::numeric_limits<UInt>::max(),
last_node_number = 0, file_format = 1, current_line = 0;
if (!infile.good()) {
AKANTU_DEBUG_ERROR("Cannot open file " << filename);
}
while (infile.good()) {
my_getline(infile, line);
current_line++;
/// read the header
if (line == "$MeshFormat") {
my_getline(infile, line); /// the format line
std::stringstream sstr(line);
std::string version;
sstr >> version;
Int format;
sstr >> format;
if (format != 0)
AKANTU_DEBUG_ERROR("This reader can only read ASCII files.");
my_getline(infile, line); /// the end of block line
current_line += 2;
file_format = 2;
}
/// read the physical names
if (line == "$PhysicalNames") {
my_getline(infile, line); /// the format line
std::stringstream sstr(line);
UInt num_of_phys_names;
sstr >> num_of_phys_names;
for (UInt k(0); k < num_of_phys_names; k++) {
my_getline(infile, line);
std::stringstream sstr_phys_name(line);
UInt phys_name_id;
UInt phys_dim;
sstr_phys_name >> phys_dim >> phys_name_id;
std::size_t b = line.find("\"");
std::size_t e = line.rfind("\"");
std::string phys_name = line.substr(b + 1, e - b - 1);
phys_name_map[phys_name_id] = phys_name;
}
}
/// read all nodes
if (line == "$Nodes" || line == "$NOD") {
UInt nb_nodes;
my_getline(infile, line);
std::stringstream sstr(line);
sstr >> nb_nodes;
current_line++;
Array<Real> & nodes = const_cast<Array<Real> &>(mesh.getNodes());
nodes.resize(nb_nodes);
mesh.nb_global_nodes = nb_nodes;
UInt index;
Real coord[3];
UInt spatial_dimension = nodes.getNbComponent();
/// for each node, read the coordinates
for (UInt i = 0; i < nb_nodes; ++i) {
UInt offset = i * spatial_dimension;
my_getline(infile, line);
std::stringstream sstr_node(line);
sstr_node >> index >> coord[0] >> coord[1] >> coord[2];
current_line++;
first_node_number = std::min(first_node_number, index);
last_node_number = std::max(last_node_number, index);
/// read the coordinates
for (UInt j = 0; j < spatial_dimension; ++j)
nodes.storage()[offset + j] = coord[j];
}
my_getline(infile, line); /// the end of block line
}
/// read all elements
if (line == "$Elements" || line == "$ELM") {
UInt nb_elements;
std::vector<UInt> read_order;
my_getline(infile, line);
std::stringstream sstr(line);
sstr >> nb_elements;
current_line++;
Int index;
UInt msh_type;
ElementType akantu_type, akantu_type_old = _not_defined;
Array<UInt> * connectivity = NULL;
UInt node_per_element = 0;
for (UInt i = 0; i < nb_elements; ++i) {
my_getline(infile, line);
std::stringstream sstr_elem(line);
current_line++;
sstr_elem >> index;
sstr_elem >> msh_type;
/// get the connectivity vector depending on the element type
akantu_type = this->_msh_to_akantu_element_types[(MSHElementType)msh_type];
if (akantu_type == _not_defined) {
AKANTU_DEBUG_WARNING("Unsuported element kind "
<< msh_type << " at line " << current_line);
continue;
}
if (akantu_type != akantu_type_old) {
connectivity = mesh.getConnectivityPointer(akantu_type);
// connectivity->resize(0);
node_per_element = connectivity->getNbComponent();
akantu_type_old = akantu_type;
read_order = this->_read_order[akantu_type];
}
/// read tags informations
if (file_format == 2) {
UInt nb_tags;
sstr_elem >> nb_tags;
for (UInt j = 0; j < nb_tags; ++j) {
Int tag;
sstr_elem >> tag;
std::stringstream sstr_tag_name;
sstr_tag_name << "tag_" << j;
Array<UInt> * data = mesh.getDataPointer<UInt>(
sstr_tag_name.str(), akantu_type, _not_ghost);
data->push_back(tag);
}
} else if (file_format == 1) {
Int tag;
sstr_elem >> tag; // reg-phys
std::string tag_name = "tag_0";
Array<UInt> * data =
mesh.getDataPointer<UInt>(tag_name, akantu_type, _not_ghost);
data->push_back(tag);
sstr_elem >> tag; // reg-elem
tag_name = "tag_1";
data = mesh.getDataPointer<UInt>(tag_name, akantu_type, _not_ghost);
data->push_back(tag);
sstr_elem >> tag; // number-of-nodes
}
UInt local_connect[node_per_element];
for (UInt j = 0; j < node_per_element; ++j) {
UInt node_index;
sstr_elem >> node_index;
AKANTU_DEBUG_ASSERT(node_index <= last_node_number,
"Node number not in range : line "
<< current_line);
node_index -= first_node_number;
local_connect[read_order[j]] = node_index;
}
connectivity->push_back(local_connect);
}
my_getline(infile, line); /// the end of block line
}
if ((line[0] == '$') && (line.find("End") == std::string::npos)) {
AKANTU_DEBUG_WARNING("Unsuported block_kind " << line << " at line "
<< current_line);
}
}
mesh.updateTypesOffsets(_not_ghost);
infile.close();
this->constructPhysicalNames("tag_0", mesh);
MeshUtils::fillElementToSubElementsData(mesh);
}
/* -------------------------------------------------------------------------- */
void MeshIOMSH::write(const std::string & filename, const Mesh & mesh) {
std::ofstream outfile;
const Array<Real> & nodes = mesh.getNodes();
outfile.open(filename.c_str());
outfile << "$MeshFormat" << std::endl;
outfile << "2.1 0 8" << std::endl;
outfile << "$EndMeshFormat" << std::endl;
outfile << std::setprecision(std::numeric_limits<Real>::digits10);
outfile << "$Nodes" << std::endl;
outfile << nodes.getSize() << std::endl;
outfile << std::uppercase;
for (UInt i = 0; i < nodes.getSize(); ++i) {
Int offset = i * nodes.getNbComponent();
outfile << i + 1;
for (UInt j = 0; j < nodes.getNbComponent(); ++j) {
outfile << " " << nodes.storage()[offset + j];
}
for (UInt p = nodes.getNbComponent(); p < 3; ++p)
outfile << " " << 0.;
outfile << std::endl;
;
}
outfile << std::nouppercase;
outfile << "$EndNodes" << std::endl;
;
outfile << "$Elements" << std::endl;
;
Mesh::type_iterator it =
mesh.firstType(_all_dimensions, _not_ghost, _ek_not_defined);
Mesh::type_iterator end =
mesh.lastType(_all_dimensions, _not_ghost, _ek_not_defined);
Int nb_elements = 0;
for (; it != end; ++it) {
const Array<UInt> & connectivity = mesh.getConnectivity(*it, _not_ghost);
nb_elements += connectivity.getSize();
}
outfile << nb_elements << std::endl;
UInt element_idx = 1;
for (it = mesh.firstType(_all_dimensions, _not_ghost, _ek_not_defined);
it != end; ++it) {
ElementType type = *it;
const Array<UInt> & connectivity = mesh.getConnectivity(type, _not_ghost);
UInt * tag[2] = {NULL, NULL};
try {
const Array<UInt> & data_tag_0 =
mesh.getData<UInt>("tag_0", type, _not_ghost);
tag[0] = data_tag_0.storage();
} catch (...) {
tag[0] = NULL;
}
try {
const Array<UInt> & data_tag_1 =
mesh.getData<UInt>("tag_1", type, _not_ghost);
tag[1] = data_tag_1.storage();
} catch (...) {
tag[1] = NULL;
}
for (UInt i = 0; i < connectivity.getSize(); ++i) {
UInt offset = i * connectivity.getNbComponent();
outfile << element_idx << " " << _akantu_to_msh_element_types[type]
<< " 2";
/// \todo write the real data in the file
for (UInt t = 0; t < 2; ++t)
if (tag[t])
outfile << " " << tag[t][i];
else
outfile << " 0";
for (UInt j = 0; j < connectivity.getNbComponent(); ++j) {
outfile << " " << connectivity.storage()[offset + j] + 1;
}
outfile << std::endl;
element_idx++;
}
}
outfile << "$EndElements" << std::endl;
;
outfile.close();
}
/* -------------------------------------------------------------------------- */
__END_AKANTU__
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