import2tablesVolume.hpp 45.6 KB
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/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
* version 0.1                                                                  *
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* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
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*                                                                              *
* This library 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 2.1 of the License, or (at your     *
* option) any later version.                                                   *
*                                                                              *
* This library 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 this library; if not, write to the Free Software Foundation,      *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
*                                                                              *
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* Web site: http://cgogn.unistra.fr/                                           *
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* Contact information: cgogn@unistra.fr                                        *
*                                                                              *
*******************************************************************************/

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#include "Geometry/orientation.h"

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//#include <libxml/encoding.h>
//#include <libxml/xmlwriter.h>
//#include <libxml/parser.h>

//#include <tinyxml2.h>
#include "Utils/xml.h"
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namespace CGoGN
{

namespace Algo
{

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namespace Volume
{

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namespace Import
{

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inline float floatFromNas(std::string& s_v)
{
	float x = 0.0f;

	std::size_t pos1 = s_v.find_last_of('-');
	if ((pos1!=std::string::npos) && (pos1!=0))
	{
		std::string res = s_v.substr(0,pos1) + "e" + s_v.substr(pos1,8-pos1);
		x = atof(res.c_str());
	}
	else
	{
		std::size_t pos2 = s_v.find_last_of('+');
		if ((pos2!=std::string::npos) && (pos2!=0))
		{
			std::string res = s_v.substr(0,pos2) + "e" + s_v.substr(pos2,8-pos2);
			x = atof(res.c_str());
		}
		else
		{
			x = atof(s_v.c_str());
		}
	}
	return x;
}


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template <typename PFP>
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bool MeshTablesVolume<PFP>::importMesh(const std::string& filename, std::vector<std::string>& attrNames)
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{
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	ImportType kind = getFileType(filename);
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	attrNames.clear() ;
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	switch (kind)
	{
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		case TET:
			return importTet(filename, attrNames);
			break;
		case OFF:
		{
			size_t pos = filename.rfind(".");
			std::string fileEle = filename;
			fileEle.erase(pos);
			fileEle.append(".ele");
			return importOFFWithELERegions(filename, fileEle, attrNames);
			break;
		}
		case NODE:
		{
			size_t pos = filename.rfind(".");
			std::string fileEle = filename;
			fileEle.erase(pos);
			fileEle.append(".ele");
			return importNodeWithELERegions(filename, fileEle, attrNames);
			break;
		}
		case TETMESH:
			return importTetmesh(filename, attrNames);
			break;
		case TS:
			return importTs(filename, attrNames);
			break;
		case MSH:
			return importMSH(filename, attrNames);
			break;
		case VTU:
			return importVTU(filename, attrNames);
			break;
		case NAS:
			return importNAS(filename, attrNames);
			break;
		case VBGZ:
			return importVBGZ(filename, attrNames);
			break;
			//	case ImportVolumique::MOKA:
			//		return importMoka(filename,attrNames);
			//		break;
			//	case OVM:
			//		return importOVM(filename, attrNames);
			//		break;
		default:
			CGoGNerr << "Not yet supported" << CGoGNendl;
			break;
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	}
	return false;
}

template <typename PFP>
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bool MeshTablesVolume<PFP>::importTet(const std::string& filename, std::vector<std::string>& attrNames)
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{
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	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
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	if (!position.isValid())
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		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
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	attrNames.push_back(position.name()) ;
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	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;
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	//open file
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	std::ifstream fp(filename.c_str(), std::ios::in);
	if (!fp.good())
	{
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		CGoGNerr << "Unable to open file " << filename << CGoGNendl;
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		return false;
	}

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	std::string ligne;
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	// reading number of vertices
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	std::getline (fp, ligne);
	std::stringstream oss(ligne);
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	oss >> m_nbVertices;
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	// reading number of tetrahedra
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	std::getline (fp, ligne);
	std::stringstream oss2(ligne);
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	oss2 >> m_nbVolumes;
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	//reading vertices
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	std::vector<unsigned int> verticesID;
	verticesID.reserve(m_nbVertices);
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	for(unsigned int i = 0; i < m_nbVertices; ++i)
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	{
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		do
		{
			std::getline (fp, ligne);
		} while (ligne.size() == 0);
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		std::stringstream oss(ligne);

		float x,y,z;
		oss >> x;
		oss >> y;
		oss >> z;
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		// TODO : if required read other vertices attributes here
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		VEC3 pos(x,y,z);
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		unsigned int id = container.insertLine();
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		position[id] = pos;
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		verticesID.push_back(id);
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	}

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	// reading volumes
	m_nbFaces.reserve(m_nbVolumes*4);
	m_emb.reserve(m_nbVolumes*12);
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    unsigned int nbc = 0;

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	for (unsigned int i = 0; i < m_nbVolumes ; ++i)
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	{
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		do
		{
			std::getline (fp, ligne);
		} while (ligne.size()==0);
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		std::stringstream oss(ligne);
		int n;
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		oss >> n; // type of volumes

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        if(!oss.good())
        {
            oss.clear();
            char dummy;
            oss >> dummy; // type of volumes
            oss >> dummy;

            if(dummy == 'C')// connector
            {
                ++nbc;
                m_nbFaces.push_back(3);

                int s0,s1,s2,s3;

                oss >> s0;
                oss >> s1;
                oss >> s2;
                oss >> s3;

                //std::cout << "connector " << s0 << " " << s1 << " " << s2 << " " << s3 << std::endl;

                m_emb.push_back(verticesID[s0]);
                m_emb.push_back(verticesID[s1]);
                m_emb.push_back(verticesID[s2]);
                m_emb.push_back(verticesID[s3]);
            }
        }
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		//tetrahedron
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        else if(n == 4)
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		{
			m_nbFaces.push_back(4);

			int s0,s1,s2,s3;

			oss >> s0;
			oss >> s1;
			oss >> s2;
			oss >> s3;

			typename PFP::VEC3 P = position[verticesID[s0]];
			typename PFP::VEC3 A = position[verticesID[s1]];
			typename PFP::VEC3 B = position[verticesID[s2]];
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            typename PFP::VEC3 C = position[verticesID[s3]];
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            if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
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			{
				int ui = s1;
				s1 = s2;
				s2 = ui;
			}

			m_emb.push_back(verticesID[s0]);
			m_emb.push_back(verticesID[s1]);
			m_emb.push_back(verticesID[s2]);
			m_emb.push_back(verticesID[s3]);
		}
		//pyramid
		else if(n == 5)
		{
			m_nbFaces.push_back(5);

			int s0,s1,s2,s3,s4;

			oss >> s0;
			oss >> s1;
			oss >> s2;
			oss >> s3;
			oss >> s4;

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			typename PFP::VEC3 P = position[verticesID[s4]];
			typename PFP::VEC3 A = position[verticesID[s0]];
			typename PFP::VEC3 B = position[verticesID[s1]];
			typename PFP::VEC3 C = position[verticesID[s2]];

			// 1 pyra ok avec cette partie
			if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::UNDER)
			{
				unsigned int pt[5];
				pt[0] = s4;
				pt[1] = s0;
				pt[2] = s1;
				pt[3] = s2;
				pt[4] = s3;

				s0 = pt[0];
				s1 = pt[1];
				s2 = pt[2];
				s3 = pt[3];
				s4 = pt[4];
			}

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			m_emb.push_back(verticesID[s0]);
			m_emb.push_back(verticesID[s1]);
			m_emb.push_back(verticesID[s2]);
			m_emb.push_back(verticesID[s3]);
			m_emb.push_back(verticesID[s4]);
		}
		//prism
		else if(n == 6)
		{
			m_nbFaces.push_back(6);

			int s0,s1,s2,s3,s4,s5;

			oss >> s0;
			oss >> s1;
			oss >> s2;
			oss >> s3;
			oss >> s4;
			oss >> s5;

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			// 1 prism ok sans cette partie
//			typename PFP::VEC3 P = position[verticesID[s5]];
//			typename PFP::VEC3 A = position[verticesID[s0]];
//			typename PFP::VEC3 B = position[verticesID[s1]];
//			typename PFP::VEC3 C = position[verticesID[s2]];
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//			if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
//			{
//				int pt[6];
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//				pt[0] = s0;
//				pt[1] = s1;
//				pt[2] = s2;
//				pt[3] = s3;
//				pt[4] = s4;
//				pt[5] = s5;
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//				s0 = pt[0];
//				s1 = pt[1];
//				s2 = pt[2];
//				s3 = pt[3];
//				s4 = pt[4];
//				s5 = pt[5];

//			}
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			m_emb.push_back(verticesID[s0]);
			m_emb.push_back(verticesID[s1]);
			m_emb.push_back(verticesID[s2]);
			m_emb.push_back(verticesID[s3]);
			m_emb.push_back(verticesID[s4]);
			m_emb.push_back(verticesID[s5]);
		}
		//hexahedron
		else if(n == 8)
		{
			m_nbFaces.push_back(8);

			int s0,s1,s2,s3,s4,s5,s6,s7;

			oss >> s0;
			oss >> s1;
			oss >> s2;
			oss >> s3;
			oss >> s4;
			oss >> s5;
			oss >> s6;
			oss >> s7;

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            typename PFP::VEC3 P = position[verticesID[s4]];
            typename PFP::VEC3 A = position[verticesID[s0]];
            typename PFP::VEC3 B = position[verticesID[s1]];
            typename PFP::VEC3 C = position[verticesID[s2]];

            // 1 hexa ok avec cette partie
            if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
            {
                unsigned int pt[8];
                pt[0] = s0;
                pt[1] = s1;
                pt[2] = s3;
                pt[3] = s2;
                pt[4] = s4;
                pt[5] = s5;
                pt[6] = s7;
                pt[7] = s6;

                s0 = pt[0];
                s1 = pt[1];
                s2 = pt[2];
                s3 = pt[3];
                s4 = pt[4];
                s5 = pt[5];
                s6 = pt[6];
                s7 = pt[7];
            }
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			m_emb.push_back(verticesID[s0]);
			m_emb.push_back(verticesID[s1]);
			m_emb.push_back(verticesID[s2]);
			m_emb.push_back(verticesID[s3]);
			m_emb.push_back(verticesID[s4]);
			m_emb.push_back(verticesID[s5]);
			m_emb.push_back(verticesID[s6]);
			m_emb.push_back(verticesID[s7]);
		}
	}
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    std::cout << "#connectors = " << nbc << std::endl;

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	fp.close();
	return true;
}

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template <typename PFP>
bool MeshTablesVolume<PFP>::importOFFWithELERegions(const std::string& filenameOFF, const std::string& filenameELE, std::vector<std::string>& attrNames)
{
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	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
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	if (!position.isValid())
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		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
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	attrNames.push_back(position.name()) ;

	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

	// open files
	std::ifstream foff(filenameOFF.c_str(), std::ios::in);
	if (!foff.good())
	{
		CGoGNerr << "Unable to open OFF file " << CGoGNendl;
		return false;
	}

	std::ifstream fele(filenameELE.c_str(), std::ios::in);
	if (!fele.good())
	{
		CGoGNerr << "Unable to open ELE file " << CGoGNendl;
		return false;
	}

	std::string line;

	//OFF reading
	std::getline(foff, line);
	if(line.rfind("OFF") == std::string::npos)
	{
		CGoGNerr << "Problem reading off file: not an off file"<<CGoGNendl;
		CGoGNerr << line << CGoGNendl;
		return false;
	}

	//Reading number of vertex/faces/edges in OFF file
	unsigned int nbe;
	{
		do
		{
			std::getline(foff,line);
		}while(line.size() == 0);

		std::stringstream oss(line);
		oss >> m_nbVertices;
		oss >> nbe;
		oss >> nbe;
		oss >> nbe;
	}

	//Reading number of tetrahedra in ELE file
	unsigned int nbv;
	{
		do
		{
			std::getline(fele,line);
		}while(line.size() == 0);

		std::stringstream oss(line);
		oss >> m_nbVolumes;
		oss >> nbv ;
		oss >> nbv;
	}

	//Reading vertices
	std::vector<unsigned int> verticesID;
	verticesID.reserve(m_nbVertices);

	for(unsigned int i = 0 ; i < m_nbVertices ; ++i)
	{
		do
		{
			std::getline(foff,line);
		}while(line.size() == 0);

		std::stringstream oss(line);

		float x,y,z;
		oss >> x;
		oss >> y;
		oss >> z;
		//we can read colors informations if exists
		VEC3 pos(x,y,z);

		unsigned int id = container.insertLine();
		position[id] = pos;
		verticesID.push_back(id);
	}

	// reading tetrahedra
	m_nbFaces.reserve(m_nbVolumes*4);
	m_emb.reserve(m_nbVolumes*12);

	for(unsigned i = 0; i < m_nbVolumes ; ++i)
	{
		do
		{
			std::getline(fele,line);
		} while(line.size() == 0);

		std::stringstream oss(line);
		oss >> nbe;

		m_nbFaces.push_back(4);

		int s0,s1,s2,s3;

		oss >> s0;
		oss >> s1;
		oss >> s2;
		oss >> s3;

		typename PFP::VEC3 P = position[verticesID[s0]];
		typename PFP::VEC3 A = position[verticesID[s1]];
		typename PFP::VEC3 B = position[verticesID[s2]];
		typename PFP::VEC3 C = position[verticesID[s3]];

		if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::UNDER)
		{
			int ui= s0;
			s0 = s3;
			s3 = s2;
			s2 = s1;
			s1 = ui;
		}

		m_emb.push_back(verticesID[s0]);
		m_emb.push_back(verticesID[s1]);
		m_emb.push_back(verticesID[s2]);
		m_emb.push_back(verticesID[s3]);
	}

	foff.close();
	fele.close();

	return true;
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}

template <typename PFP>
bool MeshTablesVolume<PFP>::importNodeWithELERegions(const std::string& filenameNode, const std::string& filenameELE, std::vector<std::string>& attrNames)
{
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	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
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	if (!position.isValid())
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		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
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	attrNames.push_back(position.name()) ;

	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

	//open file
	std::ifstream fnode(filenameNode.c_str(), std::ios::in);
	if (!fnode.good())
	{
		CGoGNerr << "Unable to open file " << filenameNode << CGoGNendl;
		return false;
	}

	std::ifstream fele(filenameELE.c_str(), std::ios::in);
	if (!fele.good())
	{
		CGoGNerr << "Unable to open file " << filenameELE << CGoGNendl;
		return false;
	}

	std::string line;

	//Reading NODE file
	//First line: [# of points] [dimension (must be 3)] [# of attributes] [# of boundary markers (0 or 1)]
	unsigned int nbe;
	{
		do
		{
			std::getline(fnode,line);
		}while(line.size() == 0);

		std::stringstream oss(line);
		oss >> m_nbVertices;
		oss >> nbe;
		oss >> nbe;
		oss >> nbe;
	}

	//Reading number of tetrahedra in ELE file
	unsigned int nbv;
	{
		do
		{
			std::getline(fele,line);
		}while(line.size() == 0);

		std::stringstream oss(line);
		oss >> m_nbVolumes;
		oss >> nbv ;
		oss >> nbv;
	}

	//Reading vertices
	std::map<unsigned int,unsigned int> verticesMapID;

	for(unsigned int i = 0 ; i < m_nbVertices ; ++i)
	{
		do
		{
			std::getline(fnode,line);
		}while(line.size() == 0);

		std::stringstream oss(line);

		int idv;
		oss >> idv;

		float x,y,z;
		oss >> x;
		oss >> y;
		oss >> z;
		//we can read colors informations if exists
		VEC3 pos(x,y,z);

		unsigned int id = container.insertLine();
		position[id] = pos;
		verticesMapID.insert(std::pair<unsigned int, unsigned int>(idv,id));
	}

	// reading tetrahedra
	m_nbFaces.reserve(m_nbVolumes*4);
	m_emb.reserve(m_nbVolumes*12);

	for(unsigned i = 0; i < m_nbVolumes ; ++i)
	{
		do
		{
			std::getline(fele,line);
		} while(line.size() == 0);

		std::stringstream oss(line);
		oss >> nbe;

		m_nbFaces.push_back(4);

		int s0,s1,s2,s3;

		oss >> s0;
		oss >> s1;
		oss >> s2;
		oss >> s3;

		typename PFP::VEC3 P = position[verticesMapID[s0]];
		typename PFP::VEC3 A = position[verticesMapID[s1]];
		typename PFP::VEC3 B = position[verticesMapID[s2]];
		typename PFP::VEC3 C = position[verticesMapID[s3]];

		if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::UNDER)
		{
			int ui= s0;
			s0 = s3;
			s3 = s2;
			s2 = s1;
			s1 = ui;
		}

		m_emb.push_back(verticesMapID[s0]);
		m_emb.push_back(verticesMapID[s1]);
		m_emb.push_back(verticesMapID[s2]);
		m_emb.push_back(verticesMapID[s3]);
	}

	fnode.close();
	fele.close();

	return true;
689 690 691 692 693
}

template <typename PFP>
bool MeshTablesVolume<PFP>::importTetmesh(const std::string& filename, std::vector<std::string>& attrNames)
{
694
	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
695

696
	if (!position.isValid())
697
		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
698

699
	attrNames.push_back(position.name()) ;
700

701
	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;
702

703 704 705 706 707 708 709
	//open file
	std::ifstream fp(filename.c_str(), std::ios::in);
	if (!fp.good())
	{
		CGoGNerr << "Unable to open file " << filename << CGoGNendl;
		return false;
	}
710

711
	std::string line;
712

713
	fp >> line;
714

715 716
	if (line!="Vertices")
		CGoGNerr << "Warning tetmesh file problem"<< CGoGNendl;
717

718
	fp >> m_nbVertices;
719

720
	std::cout << "READ: "<< m_nbVertices << std::endl;
721

722
	std::getline (fp, line);
723

724 725 726 727
	//reading vertices
	std::vector<unsigned int> verticesID;
	verticesID.reserve(m_nbVertices+1);
	verticesID.push_back(0xffffffff);
728

729 730 731 732 733 734
	for(unsigned int i = 0; i < m_nbVertices; ++i)
	{
		do
		{
			std::getline (fp, line);
		} while (line.size() == 0);
735

736
		std::stringstream oss(line);
737

738 739 740 741 742 743
		float x,y,z;
		oss >> x;
		oss >> y;
		oss >> z;
		// TODO : if required read other vertices attributes here
		VEC3 pos(x,y,z);
744

745 746
		unsigned int id = container.insertLine();
		position[id] = pos;
747

748 749
		verticesID.push_back(id);
	}
750

751 752 753
	fp >> line;
	if (line!="Tetrahedra")
		CGoGNerr << "Warning tetmesh file problem"<< CGoGNendl;
754

755 756
	fp >> m_nbVolumes;
	std::getline (fp, line);
757

758 759 760
	// reading tetrahedra
	m_nbFaces.reserve(m_nbVolumes*4);
	m_emb.reserve(m_nbVolumes*12);
761

762 763 764 765 766 767
	for(unsigned i = 0; i < m_nbVolumes ; ++i)
	{
		do
		{
			std::getline(fp,line);
		} while(line.size() == 0);
768

769
		std::stringstream oss(line);
770

771
		m_nbFaces.push_back(4);
772

773
		int s0,s1,s2,s3;
774

775 776 777 778
		oss >> s0;
		oss >> s1;
		oss >> s2;
		oss >> s3;
779

780 781 782 783
		typename PFP::VEC3 P = position[verticesID[s0]];
		typename PFP::VEC3 A = position[verticesID[s1]];
		typename PFP::VEC3 B = position[verticesID[s2]];
		typename PFP::VEC3 C = position[verticesID[s3]];
784

785 786 787 788 789 790 791 792 793 794 795 796
		if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::UNDER)
		{
			int ui=s1;
			s1 = s2;
			s2 = ui;
		}

		m_emb.push_back(verticesID[s0]);
		m_emb.push_back(verticesID[s1]);
		m_emb.push_back(verticesID[s2]);
		m_emb.push_back(verticesID[s3]);
	}
797

798 799
	fp.close();
	return true;
800 801 802 803 804
}

template <typename PFP>
bool MeshTablesVolume<PFP>::importTs(const std::string& filename, std::vector<std::string>& attrNames)
{
805 806 807 808 809 810 811 812
	// open file
	std::ifstream fp(filename.c_str(), std::ios::in);
	if (!fp.good())
	{
		CGoGNerr << "Unable to open file " << filename << CGoGNendl;
		return false;
	}

813
	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
814 815

	if (!position.isValid())
816
		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
817 818 819

	attrNames.push_back(position.name()) ;

820
	VertexAttribute<REAL, MAP> scalar = m_map.template getAttribute<REAL, VERTEX, MAP>("scalar");
821 822

	if (!scalar.isValid())
823
		scalar = m_map.template addAttribute<REAL, VERTEX, MAP>("scalar") ;
824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839

	attrNames.push_back(scalar.name()) ;

	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

	std::string ligne;

	// reading number of vertices/tetrahedra
	std::getline (fp, ligne);
	std::stringstream oss(ligne);
	oss >> m_nbVertices;
	oss >> m_nbVolumes;

	//reading vertices
	std::vector<unsigned int> verticesID;
	verticesID.reserve(m_nbVertices);
840

841 842 843 844 845 846
	for(unsigned int i = 0; i < m_nbVertices; ++i)
	{
		do
		{
			std::getline (fp, ligne);
		} while (ligne.size() == 0);
847

848
		std::stringstream oss(ligne);
849

850 851 852 853
		float x,y,z;
		oss >> x;
		oss >> y;
		oss >> z;
854

855
		VEC3 pos(x,y,z);
856

857
		unsigned int id = container.insertLine();
858

859 860
		position[id] = pos;
		verticesID.push_back(id);
861

862 863 864 865
		float scal;
		oss >> scal;
		scalar[id] = scal;
	}
866

867 868 869 870 871 872 873
	//Read and embed all tetrahedrons
	for(unsigned int i = 0; i < m_nbVolumes ; ++i)
	{
		do
		{
			std::getline(fp,ligne);
		} while(ligne.size() == 0);
874

875
		std::stringstream oss(ligne);
876

877
		m_nbFaces.push_back(4);
878

879
		int s0,s1,s2,s3,nbe;
880

881 882 883 884
		oss >> s0;
		oss >> s1;
		oss >> s2;
		oss >> s3;
885

886 887 888 889
		typename PFP::VEC3 P = position[verticesID[s0]];
		typename PFP::VEC3 A = position[verticesID[s1]];
		typename PFP::VEC3 B = position[verticesID[s2]];
		typename PFP::VEC3 C = position[verticesID[s3]];
890

891 892 893 894 895 896
		if(Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::UNDER)
		{
			int ui = s1;
			s1 = s2;
			s2 = ui;
		}
897 898


899 900
		//if regions are defined use this number
		oss >> nbe; //ignored here
901

902 903 904 905 906
		m_emb.push_back(verticesID[s0]);
		m_emb.push_back(verticesID[s1]);
		m_emb.push_back(verticesID[s2]);
		m_emb.push_back(verticesID[s3]);
	}
907

908 909 910
	fp.close();
	return true;
}
911

912 913 914 915 916 917 918 919 920 921
template <typename PFP>
bool MeshTablesVolume<PFP>::importNAS(const std::string& filename, std::vector<std::string>& attrNames)
{
	// open file
	std::ifstream fp(filename.c_str(), std::ios::in);
	if (!fp.good())
	{
		CGoGNerr << "Unable to open file " << filename << CGoGNendl;
		return false;
	}
922

923
	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
924

925
	if (!position.isValid())
926
		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
927

928
	attrNames.push_back(position.name()) ;
929

930
	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;
931

932 933
	std::string ligne;
	std::string tag;
934

935 936 937 938 939 940
	std::getline (fp, ligne);
	do
	{
		std::getline (fp, ligne);
		tag = ligne.substr(0,4);
	} while (tag !="GRID");
941

942 943 944 945 946 947 948
	 m_nbVertices = 0;
	//reading vertices
	std::map<unsigned int, unsigned int> verticesMapID;
	do
	{
		std::string s_v = ligne.substr(8,8);
		unsigned int ind = atoi(s_v.c_str());
949

950 951 952 953 954 955
		s_v = ligne.substr(24,8);
		float x = floatFromNas(s_v);
		s_v = ligne.substr(32,8);
		float y = floatFromNas(s_v);
		s_v = ligne.substr(40,8);
		float z = floatFromNas(s_v);
956

957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
		VEC3 pos(x,y,z);
		unsigned int id = container.insertLine();
		position[id] = pos;
		verticesMapID.insert(std::pair<unsigned int, unsigned int>(ind,id));
		//		std::cout << "P: "<< ind << "   "<<x<<", "<<y<<", "<<z << std::endl;
		std::getline (fp, ligne);
		tag = ligne.substr(0,4);
		m_nbVertices++;
	} while (tag =="GRID");

	m_nbVolumes = 0;

	do
	{
		std::string s_v = ligne.substr(0,6);

		if (s_v == "CHEXA ")
		{
			m_nbFaces.push_back(8);
			m_nbVolumes++;

			s_v = ligne.substr(24,8);
			unsigned int ind1 = atoi(s_v.c_str());
			s_v = ligne.substr(32,8);
			unsigned int ind2 = atoi(s_v.c_str());
			s_v = ligne.substr(40,8);
			unsigned int ind3 = atoi(s_v.c_str());
			s_v = ligne.substr(48,8);
			unsigned int ind4 = atoi(s_v.c_str());
			s_v = ligne.substr(56,8);
			unsigned int ind5 = atoi(s_v.c_str());
			s_v = ligne.substr(64,8);
			unsigned int ind6 = atoi(s_v.c_str());

			std::getline (fp, ligne);
			s_v = ligne.substr(8,8);
			unsigned int ind7 = atoi(s_v.c_str());
			s_v = ligne.substr(16,8);
			unsigned int ind8 = atoi(s_v.c_str());

			typename PFP::VEC3 P = position[verticesMapID[ind5]];
			typename PFP::VEC3 A = position[verticesMapID[ind1]];
			typename PFP::VEC3 B = position[verticesMapID[ind2]];
			typename PFP::VEC3 C = position[verticesMapID[ind3]];

			unsigned int v[8];

			if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
			{
				v[0] = ind4;
				v[1] = ind3;
				v[2] = ind2;
				v[3] = ind1;
				v[4] = ind8;
				v[5] = ind7;
				v[6] = ind6;
				v[7] = ind5;
			}
			else
			{
				v[0] = ind1;
				v[1] = ind2;
				v[2] = ind3;
				v[3] = ind4;
				v[4] = ind5;
				v[5] = ind6;
				v[6] = ind7;
				v[7] = ind8;
			}

			m_emb.push_back(verticesMapID[v[0]]);
			m_emb.push_back(verticesMapID[v[1]]);
			m_emb.push_back(verticesMapID[v[2]]);
			m_emb.push_back(verticesMapID[v[3]]);
			m_emb.push_back(verticesMapID[v[4]]);
			m_emb.push_back(verticesMapID[v[5]]);
			m_emb.push_back(verticesMapID[v[6]]);
			m_emb.push_back(verticesMapID[v[7]]);
		}
		if (s_v == "CTETRA")
		{
			m_nbFaces.push_back(4);
			m_nbVolumes++;

			s_v = ligne.substr(24,8);
			unsigned int ind1 = atoi(s_v.c_str());
			s_v = ligne.substr(32,8);
			unsigned int ind2 = atoi(s_v.c_str());
			s_v = ligne.substr(40,8);
			unsigned int ind3 = atoi(s_v.c_str());
			s_v = ligne.substr(48,8);
			unsigned int ind4 = atoi(s_v.c_str());

			typename PFP::VEC3 P = position[verticesMapID[ind1]];
			typename PFP::VEC3 A = position[verticesMapID[ind2]];
			typename PFP::VEC3 B = position[verticesMapID[ind3]];
			typename PFP::VEC3 C = position[verticesMapID[ind4]];

			Geom::Vec4ui v;

			if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
			{
				v[0] = ind4;
				v[1] = ind3;
				v[2] = ind2;
				v[3] = ind1;
			}
			else
			{
				v[0] = ind1;
				v[1] = ind2;
				v[2] = ind3;
				v[3] = ind4;
			}

			m_emb.push_back(verticesMapID[v[0]]);
			m_emb.push_back(verticesMapID[v[1]]);
			m_emb.push_back(verticesMapID[v[2]]);
			m_emb.push_back(verticesMapID[v[3]]);
		}
		std::getline (fp, ligne);
		tag = ligne.substr(0,4);
	} while (!fp.eof());

	fp.close();
1082

1083
	return true;
1084 1085
}

1086 1087
template <typename PFP>
bool MeshTablesVolume<PFP>::importMSH(const std::string& filename, std::vector<std::string>& attrNames)
1088
{
1089
	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
1090 1091

	if (!position.isValid())
1092
		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351

	attrNames.push_back(position.name()) ;

	//
	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

	// open file
	std::ifstream fp(filename.c_str(), std::ios::in);
	if (!fp.good())
	{
		CGoGNerr << "Unable to open file " << filename << CGoGNendl;
		return false;
	}

	std::string ligne;
	unsigned int nbv=0;
	//read $NODE
	std::getline (fp, ligne);

	// reading number of vertices
	std::getline (fp, ligne);
	std::stringstream oss(ligne);
	oss >> nbv;

	//reading vertices
	//	std::vector<unsigned int> verticesID;
	std::map<unsigned int, unsigned int> verticesMapID;


	//	verticesID.reserve(nbv);
	for(unsigned int i = 0; i < nbv;++i)
	{
		do
		{
			std::getline (fp, ligne);
		} while (ligne.size() == 0);

		std::stringstream oss(ligne);
		unsigned int pipo;
		float x,y,z;
		oss >> pipo;
		oss >> x;
		oss >> y;
		oss >> z;
		// TODO : if required read other vertices attributes here
		VEC3 pos(x,y,z);

		unsigned int id = container.insertLine();
		position[id] = pos;

		verticesMapID.insert(std::pair<unsigned int, unsigned int>(pipo,id));
		//		verticesID.push_back(id);
	}

	// ENNODE
	std::getline (fp, ligne);

	m_nbVertices = nbv;

	// ELM
	std::getline (fp, ligne);

	// reading number of elements
	std::getline (fp, ligne);
	unsigned int nbe=0;
	std::stringstream oss2(ligne);
	oss2 >> nbe;

	m_nbVolumes = nbe;

	bool invertVol = false;

	for(unsigned int i=0; i<nbe; ++i)
	{
		unsigned int pipo,type_elm,nb;
		fp >> pipo;
		fp >> type_elm;
		fp >> pipo;
		fp >> pipo;
		fp >> nb;

		if ((type_elm==4) && (nb==4))
		{
			Geom::Vec4ui v;

			m_nbFaces.push_back(4);


			// test orientation of first tetra
			if (i==0)
			{
				fp >> v[0];
				fp >> v[1];
				fp >> v[2];
				fp >> v[3];

				typename PFP::VEC3 P = position[verticesMapID[v[0]]];
				typename PFP::VEC3 A = position[verticesMapID[v[1]]];
				typename PFP::VEC3 B = position[verticesMapID[v[2]]];
				typename PFP::VEC3 C = position[verticesMapID[v[3]]];

				if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
				{
					invertVol=true;
					unsigned int ui=v[0];
					v[0] = v[3];
					v[3] = v[2];
					v[2] = v[1];
					v[1] = ui;
				}
			}
			else
			{
				if (invertVol)
				{
					fp >> v[1];
					fp >> v[2];
					fp >> v[3];
					fp >> v[0];
				}
				else
				{
					fp >> v[0];
					fp >> v[1];
					fp >> v[2];
					fp >> v[3];
				}
			}
			m_emb.push_back(verticesMapID[v[0]]);
			m_emb.push_back(verticesMapID[v[1]]);
			m_emb.push_back(verticesMapID[v[2]]);
			m_emb.push_back(verticesMapID[v[3]]);
		}
		else
		{
			if ((type_elm==5) && (nb==8))
			{
				Geom::Vec4ui v;

				m_nbFaces.push_back(8);

				if (i==0)
				{
					unsigned int last;
					fp >> v[0];
					fp >> v[1];
					fp >> v[2];
					fp >> v[3];
					fp >> last;

					typename PFP::VEC3 P = position[verticesMapID[last]];
					typename PFP::VEC3 A = position[verticesMapID[v[0]]];
					typename PFP::VEC3 B = position[verticesMapID[v[1]]];
					typename PFP::VEC3 C = position[verticesMapID[v[2]]];

					if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
					{

						invertVol=true;
						unsigned int ui = v[3];
						v[3] = v[0];
						v[0] = ui;
						ui = v[2];
						v[2] = v[1];
						v[1] = ui;
						// hexa.push_back(v);
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
						v[3] = last;
						fp >> v[2];
						fp >> v[1];
						fp >> v[0];
						//hexa.push_back(v);
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
					}
					else
					{
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
						//hexa.push_back(v);
						v[0] = last;
						fp >> v[1];
						fp >> v[2];
						fp >> v[3];
						//hexa.push_back(v);
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
					}
				}
				else
				{
					if (invertVol)
					{
						fp >> v[3];
						fp >> v[2];
						fp >> v[1];
						fp >> v[0];
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
						//hexa.push_back(v);
						fp >> v[3];
						fp >> v[2];
						fp >> v[1];
						fp >> v[0];
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
						//hexa.push_back(v);

					}
					else
					{
						fp >> v[0];
						fp >> v[1];
						fp >> v[2];
						fp >> v[3];
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
						//hexa.push_back(v);
						fp >> v[0];
						fp >> v[1];
						fp >> v[2];
						fp >> v[3];
						m_emb.push_back(verticesMapID[v[0]]);
						m_emb.push_back(verticesMapID[v[1]]);
						m_emb.push_back(verticesMapID[v[2]]);
						m_emb.push_back(verticesMapID[v[3]]);
						//hexa.push_back(v);
					}
				}
			}
			else
			{
				for (unsigned int j=0; j<nb; ++j)
				{
					unsigned int v;
					fp >> v;
				}
			}
		}
	}

	fp.close();

	return true;
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}
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template <typename PFP>
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bool MeshTablesVolume<PFP>::importVBGZ(const std::string& filename, std::vector<std::string>& attrNames)
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{
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	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
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	if (!position.isValid())
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		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
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	attrNames.push_back(position.name()) ;

	//
	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

	//open file
	igzstream fs(filename.c_str(), std::ios::in|std::ios::binary);
	if (!fs.good())
	{
		CGoGNerr << "Unable to open file " << filename << CGoGNendl;
		return false;
	}


	unsigned int numbers[3];

	// read nb of points
	fs.read(reinterpret_cast<char*>(numbers), 3*sizeof(unsigned int));

	VEC3* bufposi;
	bufposi = new VEC3[ numbers[0] ];
	fs.read(reinterpret_cast<char*>(bufposi), numbers[0]*sizeof(VEC3));

	std::vector<unsigned int> verticesID;
	verticesID.reserve(numbers[0]);

	for(unsigned int i = 0; i < numbers[0];++i)
	{
		unsigned int id = container.insertLine();
		position[id] = bufposi[i];
		verticesID.push_back(id);
	}
	delete bufposi;

	unsigned int* bufTetra=NULL;
	if (numbers[1] != 0)
	{
		bufTetra = new unsigned int[ 4*numbers[1] ];
		fs.read(reinterpret_cast<char*>(bufTetra), 4*numbers[1]*sizeof(unsigned int));
	}

	unsigned int* bufHexa=NULL;
	if (numbers[2] != 0)
	{
		bufHexa = new unsigned int[ 8*numbers[2] ];
		fs.read(reinterpret_cast<char*>(bufHexa), 8*numbers[2]*sizeof(unsigned int));
	}
	CGoGNout << "nb vertices = " << numbers[0];

	m_nbVertices = numbers[0];
	m_nbVolumes = numbers[1] + numbers[2];

	if (numbers[1] > 0)
	{
		//Read and embed all tetrahedrons
		for(unsigned int i = 0; i < numbers[1] ; ++i)
		{
			Geom::Vec4ui pt;

			m_nbFaces.push_back(4);

			pt[0] = bufTetra[4*i];
			pt[1] = bufTetra[4*i+1];
			pt[2] = bufTetra[4*i+2];
			pt[3] = bufTetra[4*i+3];

			m_emb.push_back(verticesID[pt[0]]);
			m_emb.push_back(verticesID[pt[1]]);
			m_emb.push_back(verticesID[pt[2]]);
			m_emb.push_back(verticesID[pt[3]]);

			//end of tetra
		}
		CGoGNout << " / nb tetra = " << numbers[1];
		delete[] bufTetra;
	}

	if (numbers[2] > 0)
	{
		//Read and embed all tetrahedrons
		for(unsigned int i = 0; i < numbers[2] ; ++i)
		{
			m_nbFaces.push_back(8);
			// one hexa
			unsigned int pt[8];
			pt[0] = bufHexa[8*i];
			pt[1] = bufHexa[8*i+1];
			pt[2] = bufHexa[8*i+2];
			pt[3] = bufHexa[8*i+3];
			pt[4] = bufHexa[8*i+4];
			pt[5] = bufHexa[8*i+5];
			pt[6] = bufHexa[8*i+6];
			pt[7] = bufHexa[8*i+7];

			m_emb.push_back(verticesID[pt[0]]);
			m_emb.push_back(verticesID[pt[1]]);
			m_emb.push_back(verticesID[pt[2]]);
			m_emb.push_back(verticesID[pt[3]]);
			m_emb.push_back(verticesID[pt[4]]);
			m_emb.push_back(verticesID[pt[5]]);
			m_emb.push_back(verticesID[pt[6]]);
			m_emb.push_back(verticesID[pt[7]]);
			//end of hexa
		}
		CGoGNout << " / nb hexa = " << numbers[2];
		delete[] bufHexa;
	}

	return true;
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}

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//template <typename PFP>
//bool MeshTablesVolume<PFP>::importVTU(const std::string& filename, std::vector<std::string>& attrNames)
//{
//	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;

//	if (!position.isValid())
//		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;

//	attrNames.push_back(position.name()) ;

//	//
//	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

//	xmlDocPtr doc = xmlReadFile(filename.c_str(), NULL, 0);
//	xmlNodePtr vtu_node = xmlDocGetRootElement(doc);

//	//	std::cout << " NAME "<<vtu_node->name << std::endl;

//	xmlChar *prop = xmlGetProp(vtu_node, BAD_CAST "type");
//	//	std::cout << "type = "<< prop << std::endl;

//	xmlNode* grid_node = vtu_node->children;
//	while (strcmp((char*)(grid_node->name),(char*)"UnstructuredGrid")!=0)
//		grid_node = grid_node->next;

//	xmlNode* piece_node = grid_node->children;
//	while (strcmp((char*)(piece_node->name),(char*)"Piece")!=0)
//		piece_node = piece_node->next;

//	prop = xmlGetProp(piece_node, BAD_CAST "NumberOfPoints");
//	m_nbVertices = atoi((char*)(prop));

//	prop = xmlGetProp(piece_node, BAD_CAST "NumberOfCells");
//	m_nbVolumes = atoi((char*)(prop));

//	std::cout << "Number of points = "<< m_nbVertices<< std::endl;
//	std::cout << "Number of cells = "<< m_nbVolumes << std::endl;

//	xmlNode* points_node = piece_node->children;
//	while (strcmp((char*)(points_node->name),(char*)"Points")!=0)
//		points_node = points_node->next;

//	points_node = points_node->children;
//	while (strcmp((char*)(points_node->name),(char*)"DataArray")!=0)
//		points_node = points_node->next;

//	std::vector<unsigned int> verticesID;
//	verticesID.reserve(m_nbVertices);

//	std::stringstream ss((char*)(xmlNodeGetContent(points_node->children)));
//	for (unsigned int i=0; i< m_nbVertices; ++i)
//	{
//		typename PFP::VEC3 P;
//		ss >> P[0]; ss >> P[1]; ss >> P[2];
//		unsigned int id = container.insertLine();
//		position[id] = P;
//		verticesID.push_back(id);
//	}

//	xmlNode* cell_node = piece_node->children;
//	while (strcmp((char*)(cell_node->name),(char*)"Cells")!=0)
//		cell_node = cell_node->next;

//	std::cout <<"CELL NODE = "<< cell_node->name << std::endl;


//	std::vector<unsigned char> typeVols;
//	typeVols.reserve(m_nbVolumes);
//	std::vector<unsigned int> offsets;
//	offsets.reserve(m_nbVolumes);
//	std::vector<unsigned int> indices;
//	indices.reserve(m_nbVolumes*4);

//	for (xmlNode* x_node = cell_node->children; x_node!=NULL; x_node = x_node->next)
//	{
//		while ((x_node!=NULL) && (strcmp((char*)(x_node->name),(char*)"DataArray")!=0))
//			x_node = x_node->next;

//		if (x_node == NULL)
//			break;
//		else
//		{
//			xmlChar* type = xmlGetProp(x_node, BAD_CAST "Name");

//			if (strcmp((char*)(type),(char*)"connectivity")==0)
//			{
//				std::stringstream ss((char*)(xmlNodeGetContent(x_node->children)));
//				while (!ss.eof())
//				{
//					unsigned int ind;
//					ss >> ind;
//					indices.push_back(ind);
//				}
//			}
//			if (strcmp((char*)(type),(char*)"offsets")==0)
//			{
//				std::stringstream ss((char*)(xmlNodeGetContent(x_node->children)));
//				for (unsigned int i=0; i< m_nbVolumes; ++i)
//				{
//					unsigned int o;
//					ss >> o;
//					offsets.push_back(o);
//				}
//			}
//			if (strcmp((char*)(type),(char*)"types")==0)
//			{
//				bool unsupported = false;
//				std::stringstream ss((char*)(xmlNodeGetContent(x_node->children)));
//				for (unsigned int i=0; i< m_nbVolumes; ++i)
//				{
//					unsigned int t;
//					ss >> t;
//					if ((t != 12) && (t!= 10))
//					{
//						unsupported = true;
//						typeVols.push_back(0);
//					}
//					else
//					{
//						typeVols.push_back((unsigned char)t);
//					}
//				}
//				if (unsupported)
//					CGoGNerr << "warning, some unsupported volume cell types"<< CGoGNendl;
//			}
//		}
//	}

//	xmlFreeDoc(doc);

//	unsigned int currentOffset = 0;
//	for (unsigned int i=0; i< m_nbVolumes; ++i)
//	{
//		if (typeVols[i]==12)
//		{
//			m_nbFaces.push_back(8);

//			unsigned int pt[8];
//			pt[0] = indices[currentOffset];
//			pt[1] = indices[currentOffset+1];
//			pt[2] = indices[currentOffset+2];
//			pt[3] = indices[currentOffset+3];
//			pt[4] = indices[currentOffset+4];
//			typename PFP::VEC3 P = position[verticesID[indices[currentOffset+4]]];
//			typename PFP::VEC3 A = position[verticesID[indices[currentOffset  ]]];
//			typename PFP::VEC3 B = position[verticesID[indices[currentOffset+1]]];
//			typename PFP::VEC3 C = position[verticesID[indices[currentOffset+2]]];

//			if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
//			{

//				pt[0] = indices[currentOffset+3];
//				pt[1] = indices[currentOffset+2];
//				pt[2] = indices[currentOffset+1];
//				pt[3] = indices[currentOffset+0];
//				pt[4] = indices[currentOffset+7];
//				pt[5] = indices[currentOffset+6];
//				pt[6] = indices[currentOffset+5];
//				pt[7] = indices[currentOffset+4];
//			}
//			else
//			{
//				pt[0] = indices[currentOffset+0];
//				pt[1] = indices[currentOffset+1];
//				pt[2] = indices[currentOffset+2];
//				pt[3] = indices[currentOffset+3];
//				pt[4] = indices[currentOffset+4];
//				pt[5] = indices[currentOffset+5];
//				pt[6] = indices[currentOffset+6];
//				pt[7] = indices[currentOffset+7];
//			}

//			m_emb.push_back(verticesID[pt[0]]);
//			m_emb.push_back(verticesID[pt[1]]);
//			m_emb.push_back(verticesID[pt[2]]);
//			m_emb.push_back(verticesID[pt[3]]);
//			m_emb.push_back(verticesID[pt[4]]);
//			m_emb.push_back(verticesID[pt[5]]);
//			m_emb.push_back(verticesID[pt[6]]);
//			m_emb.push_back(verticesID[pt[7]]);

//		}
//		else if (typeVols[i]==10)
//		{
//			m_nbFaces.push_back(4);

//			Geom::Vec4ui pt;
//			pt[0] = indices[currentOffset];
//			pt[1] = indices[currentOffset+1];
//			pt[2] = indices[currentOffset+2];
//			pt[3] = indices[currentOffset+3];

//			typename PFP::VEC3 P = position[verticesID[pt[0]]];
//			typename PFP::VEC3 A = position[verticesID[pt[1]]];
//			typename PFP::VEC3 B = position[verticesID[pt[2]]];
//			typename PFP::VEC3 C = position[verticesID[pt[3]]];

//			if (Geom::testOrientation3D<typename PFP::VEC3>(P,A,B,C) == Geom::OVER)
//			{
//				unsigned int ui=pt[1];
//				pt[1] = pt[2];
//				pt[2] = ui;
//			}

//			m_emb.push_back(verticesID[pt[0]]);
//			m_emb.push_back(verticesID[pt[1]]);
//			m_emb.push_back(verticesID[pt[2]]);
//			m_emb.push_back(verticesID[pt[3]]);
//		}
//		currentOffset = offsets[i];
//	}

//	return true;
//}


//inline bool XMLisError(tinyxml2::XMLError err, const std::string& msg)
//{
//	if (err != tinyxml2::XML_NO_ERROR)
//	{
//		CGoGNerr << msg << CGoGNendl;
//		return true;
//	}
//	return false;
//}

//inline std::string XMLAttribute(tinyxml2::XMLElement* node, const char* attName)
//{
//	const char *ptr = node->Attribute(attName);
//	if (ptr == NULL)
//	{
//		CGoGNerr << "Warning attrbute "<< attName << " not found"<< CGoGNendl;
//		return "";
//	}
//	return std::string(ptr);
//}



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template <typename PFP>
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bool MeshTablesVolume<PFP>::importVTU(const std::string& filename, std::vector<std::string>& attrNames)
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{
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	VertexAttribute<VEC3, MAP> position =  m_map.template getAttribute<VEC3, VERTEX, MAP>("position") ;
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	if (!position.isValid())
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		position = m_map.template addAttribute<VEC3, VERTEX, MAP>("position") ;
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	attrNames.push_back(position.name()) ;

	//
	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;


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	tinyxml2::XMLDocument doc;
	tinyxml2::XMLError eResult = doc.LoadFile(filename.c_str());
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	if (XMLisError(eResult,"unable loading file"+filename))
		return false;
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	tinyxml2::XMLElement* vtu_node = doc.RootElement();
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	tinyxml2::XMLElement* grid_node = vtu_node->FirstChildElement("UnstructuredGrid");
	tinyxml2::XMLElement* piece_node = grid_node->FirstChildElement("Piece");
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	eResult = piece_node->QueryUnsignedAttribute("NumberOfPoints",&m_nbVertices);
	if (XMLisError(eResult,"unreadable VTU file: "+filename))
		return false;
	eResult = piece_node->QueryUnsignedAttribute("NumberOfCells",&m_nbVolumes);
	if (XMLisError(eResult,"unreadable VTU file: "+filename))
		return false;
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	CGoGNout << "Number of points = "<< m_nbVertices<< CGoGNendl;
	CGoGNout << "Number of cells = "<< m_nbVolumes << CGoGNendl;
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	tinyxml2::XMLElement* points_node = piece_node->FirstChildElement("Points");
	tinyxml2::XMLElement* array_node = points_node->FirstChildElement("DataArray");
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	std::vector<unsigned int> verticesID;
	verticesID.reserve(m_nbVertices);

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	std::stringstream ss(array_node->GetText());

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	for (unsigned int i=0; i< m_nbVertices; ++i)
	{
		typename PFP::VEC3 P;
		ss >> P[0]; ss >> P[1]; ss >> P[2];
		unsigned int id = container.insertLine();
		position[id] = P;
		verticesID.push_back(id);
	}

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	tinyxml2::XMLElement* cell_node = piece_node->FirstChildElement("Cells");
	array_node = cell_node->FirstChildElement("DataArray");
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	std::vector<unsigned char> typeVols;
	typeVols.reserve(m_nbVolumes);
	std::vector<unsigned int> offsets;
	offsets.reserve(m_nbVolumes);
	std::vector<unsigned int> indices;
	indices.reserve(m_nbVolumes*4);

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	while (array_node)
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	{
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		std::string propName = XMLAttribute(array_node,"Name");
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		if (propName == "")
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		{
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			CGoGNerr << "Error reading VTU unreadable file: "<<filename<< CGoGNendl;
			return false;
		}
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		if (propName == "connectivity")
		{
			std::stringstream ss(array_node->GetText());
			while (!ss.eof())
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			{
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				unsigned int ind;
				ss >> ind;
				indices.push_back(ind);
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			}
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		}
		if (propName == "offsets")
		{
			std::stringstream ss(array_node->GetText());
			for (unsigned int i=0; i< m_nbVolumes; ++i)
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			{
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				unsigned int o;
				ss >> o;
				offsets.push_back(o);
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			}
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		}
		if (propName == "types")
		{
			bool unsupported = false;
			std::stringstream ss(array_node->GetText());
			for (unsigned int i=0; i< m_nbVolumes; ++i)
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			{