importObjTex.hpp 44.3 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 "Topology/generic/attributeHandler.h"
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#include "Topology/generic/autoAttributeHandler.h"
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#include "Container/fakeAttribute.h"
#include <fstream>
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#include <algorithm>
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namespace CGoGN
{
namespace Algo
{
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namespace Surface
{
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namespace Import 
{

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template <typename PFP>
OBJModel<PFP>::OBJModel(typename PFP::MAP& map):
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	m_map(map), m_maxTextureSize(2048),
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	m_tagV(0),m_tagVT(0),m_tagVN(0),m_tagG(0),m_tagF(0),
	m_specialVertices(map),m_dirtyEdges(map)
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{
}

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template <typename PFP>
OBJModel<PFP>::~OBJModel()
{
	for (std::vector<MaterialOBJ*>::iterator it = m_materials.begin(); it != m_materials.end(); ++it)
		delete *it;
}

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template <typename PFP>
inline void OBJModel<PFP>::setMaxTextureSize(unsigned int mts)
{
	m_maxTextureSize = mts;
}


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template <typename PFP>
inline typename PFP::VEC3 OBJModel<PFP>::getPosition(Dart d)
{
	return m_positions[d];
}
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template <typename PFP>
inline typename PFP::VEC3 OBJModel<PFP>::getNormal(Dart d)
{
	if (m_specialVertices.isMarked(d))
		return m_normalsF[d];
	return m_normals[d];
}


template <typename PFP>
inline Geom::Vec2f OBJModel<PFP>::getTexCoord(Dart d)
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{
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	if (m_specialVertices.isMarked(d))
		return m_texCoordsF[d];
	return m_texCoords[d];
}


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template <typename PFP>
void OBJModel<PFP>::setPositionAttribute(VertexAttribute<Geom::Vec3f> position)
{
	m_positions = position;
}

template <typename PFP>
void OBJModel<PFP>::setNormalAttribute(VertexAttribute<Geom::Vec3f> normal)
{
	m_normals = normal;
}

template <typename PFP>
void OBJModel<PFP>::setTexCoordAttribute(VertexAttribute<Geom::Vec2f>texcoord)
{
	m_texCoords = texcoord;
}


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template <typename PFP>
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void OBJModel<PFP>::readMaterials(const std::string& filename)
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{
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	m_materials.reserve(m_materialNames.size());

	if (!filename.empty())
	{
		m_matFileName = filename;
	}

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	// open file
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	std::ifstream fp(m_matFileName.c_str());
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	if (!fp.good())
	{
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		CGoGNerr << "Unable to open file " << m_matFileName << CGoGNendl;
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		return ;
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	}
	
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	MaterialOBJ* currentMat = NULL;

	m_materials.resize(m_materialNames.size(),NULL);
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	std::string ligne;
	do
	{
		std::getline (fp, ligne);
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		std::stringstream oss(ligne);
		std::string tag;
		oss >> tag;
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		if (tag == "newmtl")
		{
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			std::string name;
			oss >> name ;
			std::map<std::string,int>::iterator it = m_materialNames.find(name);
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			if (it ==  m_materialNames.end())
			{
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				CGoGNerr << "Skipping material "<< name << CGoGNendl;
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				do
				{
					fp >> tag;
					
				}while (!fp.eof() && (tag == "new mtl")); 
			}
			else
			{
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//				CGoGNout << "Reading material "<< name << CGoGNendl;
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				currentMat = new MaterialOBJ();
				m_materials[it->second] = currentMat;
				currentMat->name = name;
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			}
		}
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		else if (currentMat != NULL)
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		{
			if (tag == "Ka")
			{
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				oss >> currentMat->ambiantColor[0];
				oss >> currentMat->ambiantColor[1];
				oss >> currentMat->ambiantColor[2];
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			}
			if (tag == "Kd")
			{
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				oss >> currentMat->diffuseColor[0];
				oss >> currentMat->diffuseColor[1];
				oss >> currentMat->diffuseColor[2];

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			}
			if (tag == "Ks")
			{
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				oss >> currentMat->specularColor[0];
				oss >> currentMat->specularColor[1];
				oss >> currentMat->specularColor[2];
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			}
			if (tag == "Ns")
			{
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				oss >> currentMat->shininess;
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			}
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			if (tag == "Tf")
			{
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				oss >> currentMat->transparentFilter[0];
				oss >> currentMat->transparentFilter[1];
				oss >> currentMat->transparentFilter[2];
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			}

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			if ((tag == "illum"))
			{
				oss >> currentMat->illuminationModel;
			}


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			if ((tag == "Tr") || (tag == "d"))
			{
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				oss >> currentMat->transparency;
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			}
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			if (tag == "map_Kd") // diffuse texture
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			{
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				if (currentMat->textureDiffuse == NULL)
				{
					currentMat->textureDiffuse = new Utils::Texture<2,Geom::Vec3uc>(GL_UNSIGNED_BYTE);
					std::string buff;
					getline (oss, buff);
					std::string tname = buff.substr(buff.find_first_not_of(' '));
					if (tname[tname.length()-1] == '\r')
						tname = tname.substr(0,tname.length()-1);

					currentMat->textureDiffuse->load(m_matPath+tname);
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//					CGoGNout << "Loading texture "<< m_matPath+tname << " -> "<<std::hex << currentMat->textureDiffuse <<std::dec<<CGoGNendl;
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					currentMat->textureDiffuse->scaleNearest( currentMat->textureDiffuse->newMaxSize(m_maxTextureSize));
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					currentMat->textureDiffuse->setFiltering(GL_LINEAR);
					currentMat->textureDiffuse->setWrapping(GL_REPEAT);
					currentMat->textureDiffuse->update();
				}
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			}
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			if (tag == "map_Ka") // ambiant texture
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			{
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//				CGoGNerr << tag << " not yet supported in OBJ material reading" << CGoGNendl;
				if (currentMat->textureDiffuse == NULL)
				{
					currentMat->textureDiffuse = new Utils::Texture<2,Geom::Vec3uc>(GL_UNSIGNED_BYTE);
					std::string buff;
					getline (oss, buff);
					std::string tname = buff.substr(buff.find_first_not_of(' '));
					if (tname[tname.length()-1] == '\r')
						tname = tname.substr(0,tname.length()-1);
					currentMat->textureDiffuse->load(m_matPath+tname);
					CGoGNout << "Loading texture "<< m_matPath+tname << " -> "<<std::hex << currentMat->textureDiffuse <<std::dec<<CGoGNendl;
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					currentMat->textureDiffuse->scaleNearest( currentMat->textureDiffuse->newMaxSize(m_maxTextureSize));
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					currentMat->textureDiffuse->setFiltering(GL_LINEAR);
					currentMat->textureDiffuse->setWrapping(GL_REPEAT);
					currentMat->textureDiffuse->update();
				}
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			}
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			if (tag == "map_d") // opacity texture
			{
				CGoGNerr << tag << " not yet supported in OBJ material reading" << CGoGNendl;
			}
			if ((tag == "map_bump") || (tag == "bump"))
			{
				CGoGNerr << tag << " not yet supported in OBJ material reading" << CGoGNendl;
			}
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			tag="";
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		}
	}while (!fp.eof());

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	for (std::vector<MaterialOBJ*>::iterator it = m_materials.begin(); it != m_materials.end(); ++it)
	{
		if (*it == NULL)
			CGoGNerr << "Warning missing material in .mtl"<< CGoGNendl;
	}
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}
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template <typename PFP>
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unsigned int OBJModel<PFP>::getMaterialIndex(const std::string& name) const
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{
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	std::map<std::string, int>::iterator it = m_materialNames.find(name);
	if (it != m_materialNames.end())
		return it->second;
	return 0xffffffff;
}


//template <typename PFP>
//bool OBJModel<PFP>::generateBrowsers(std::vector<ContainerBrowser*>& browsers)
//{
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//	browsers.clear();
//	if (m_groupNames.empty())
//		return false;
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//	ContainerBrowserLinked* MBLptr = new ContainerBrowserLinked(m_map,DART);
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//	browsers.push_back(MBLptr);
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//	for (unsigned int i = 1; i<m_groupNames.size(); ++i)
//	{
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//		ContainerBrowser* MBptr = new ContainerBrowserLinked(*MBLptr);
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//		browsers.push_back(MBptr);
//		m_groupMaterialID[i]= m_materialNames[m_groupMaterialNames[i]];
//	}
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//	for (Dart d=m_map.begin(); d!=m_map.end(); m_map.next(d))
//	{
//		unsigned int g = m_groups[d] -1 ; // groups are name from 1
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//		ContainerBrowserLinked* mb = static_cast<ContainerBrowserLinked*>(browsers[g]);
//		mb->pushBack(d.index);
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//	}
//	return true;
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//}
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template <typename PFP>
short OBJModel<PFP>::readObjLine(std::stringstream& oss, std::vector<unsigned int>& indices)
{
	indices.clear();
	
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	unsigned int nb=0;
	while (!oss.eof())  // lecture de tous les indices
	{
		int index;
		oss >> index;

		indices.push_back(index);

		int slash = 0;
		char sep='_';
		do
		{
			oss >> sep;
			if (sep =='/')
				++slash;
		} while ( ((sep=='/') || (sep ==' ')) && !oss.eof() ) ;

		if ((sep>='0') && (sep<='9'))
			oss.seekg(-1,std::ios_base::cur);

		if (slash == 0)
		{
			if (indices.size()%3 == 1)
			{
				indices.push_back(0);
				indices.push_back(0);
			}
			if (indices.size()%3 == 2)
			{
				indices.push_back(0);
			}
			nb++;
		}


		if (slash == 2)
		{
			indices.push_back(0);
		}
	}
	return nb;
}


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template <typename PFP>
unsigned int OBJModel<PFP>::createSimpleVBO_P(Utils::VBO* positionVBO)
{
	TraversorF<typename PFP::MAP> traf(m_map);
	std::vector<Geom::Vec3f> posBuff;
	posBuff.reserve(16384);
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	unsigned int nbtris = 0;
	for (Dart d=traf.begin(); d!= traf.end(); d = traf.next())
	{
		Dart e = m_map.phi1(d);
		Dart f = m_map.phi1(e);
		do
		{
			posBuff.push_back(m_positions[d]);
			posBuff.push_back(m_positions[e]);
			posBuff.push_back(m_positions[f]);
			e=f;
			f = m_map.phi1(e);
			nbtris++;
		}while (f!=d);
	}

	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	return 3*nbtris;
}
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template <typename PFP>
unsigned int OBJModel<PFP>::createSimpleVBO_PT(Utils::VBO* positionVBO, Utils::VBO* texcoordVBO)
{
	TraversorF<typename PFP::MAP> traf(m_map);
	std::vector<Geom::Vec3f> posBuff;
	std::vector<Geom::Vec2f> TCBuff;
	posBuff.reserve(16384);
	TCBuff.reserve(16384);

	unsigned int nbtris = 0;
	for (Dart d=traf.begin(); d!= traf.end(); d = traf.next())
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	{
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		Dart e = m_map.phi1(d);
		Dart f = m_map.phi1(e);
		do
		{
			posBuff.push_back(m_positions[d]);
			if (m_specialVertices.isMarked(d))
				TCBuff.push_back(m_texCoordsF[d]);
			else
				TCBuff.push_back(m_texCoords[d]);

			posBuff.push_back(m_positions[e]);
			if (m_specialVertices.isMarked(e))
				TCBuff.push_back(m_texCoordsF[e]);
			else
				TCBuff.push_back(m_texCoords[e]);

			posBuff.push_back(m_positions[f]);
			if (m_specialVertices.isMarked(f))
				TCBuff.push_back(m_texCoordsF[f]);
			else
				TCBuff.push_back(m_texCoords[f]);
			e=f;
			f = m_map.phi1(e);
			nbtris++;
		}while (f!=d);
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	}

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	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	texcoordVBO->setDataSize(2);
	texcoordVBO->allocate(TCBuff.size());
	Geom::Vec2f* ptrTC = reinterpret_cast<Geom::Vec2f*>(texcoordVBO->lockPtr());
	memcpy(ptrTC,&TCBuff[0],TCBuff.size()*sizeof(Geom::Vec2f));
	texcoordVBO->releasePtr();

	return 3*nbtris;
}

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template <typename PFP>
unsigned int OBJModel<PFP>::createSimpleVBO_PN(Utils::VBO* positionVBO, Utils::VBO* normalVBO )
{
	TraversorF<typename PFP::MAP> traf(m_map);
	std::vector<Geom::Vec3f> posBuff;
	std::vector<Geom::Vec2f> normalBuff;
	posBuff.reserve(16384);
	normalBuff.reserve(16384);

	unsigned int nbtris = 0;
	for (Dart d=traf.begin(); d!= traf.end(); d = traf.next())
	{
		Dart e = m_map.phi1(d);
		Dart f = m_map.phi1(e);
		do
		{
			posBuff.push_back(m_positions[d]);
			if (m_specialVertices.isMarked(d))
			{
				normalBuff.push_back(m_normalsF[d]);
			}
			else
			{
				normalBuff.push_back(m_normals[d]);
			}

			posBuff.push_back(m_positions[e]);
			if (m_specialVertices.isMarked(e))
			{
				normalBuff.push_back(m_normalsF[e]);
			}
			else
			{
				normalBuff.push_back(m_normals[e]);
			}

			posBuff.push_back(m_positions[f]);
			if (m_specialVertices.isMarked(f))
			{
				normalBuff.push_back(m_normalsF[f]);
			}
			else
			{
				normalBuff.push_back(m_normals[f]);
			}
			e=f;
			f = m_map.phi1(e);
			nbtris++;
		}while (f!=d);
	}

	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	normalVBO->setDataSize(3);
	normalVBO->allocate(normalBuff.size());
	Geom::Vec3f* ptrNormal = reinterpret_cast<Geom::Vec3f*>(normalVBO->lockPtr());
	memcpy(ptrNormal, &normalBuff[0], normalBuff.size()*sizeof(Geom::Vec3f));
	normalVBO->releasePtr();


	return 3*nbtris;
}



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template <typename PFP>
unsigned int OBJModel<PFP>::createSimpleVBO_PTN(Utils::VBO* positionVBO, Utils::VBO* texcoordVBO, Utils::VBO* normalVBO )
{
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	if (!m_normals.isValid())
	{
		CGoGNerr << "no normal attribute "<< CGoGNendl;
		return 0;
	}
	if (!m_texCoords.isValid())
	{
		CGoGNerr << "no tex coords attribute "<< CGoGNendl;
		return 0;
	}


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	TraversorF<typename PFP::MAP> traf(m_map);
	std::vector<Geom::Vec3f> posBuff;
	std::vector<Geom::Vec2f> TCBuff;
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	std::vector<Geom::Vec3f> normalBuff;
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	posBuff.reserve(16384);
	TCBuff.reserve(16384);
	normalBuff.reserve(16384);

	unsigned int nbtris = 0;
	for (Dart d=traf.begin(); d!= traf.end(); d = traf.next())
	{
		Dart e = m_map.phi1(d);
		Dart f = m_map.phi1(e);
		do
		{
			posBuff.push_back(m_positions[d]);
			if (m_specialVertices.isMarked(d))
			{
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				if (hasTexCoords())
					TCBuff.push_back(m_texCoordsF[d]);
				else
					TCBuff.push_back(m_texCoords[d]);
				if (hasNormals())
					normalBuff.push_back(m_normalsF[d]);
				else
					normalBuff.push_back(m_normals[d]);
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			}
			else
			{
				TCBuff.push_back(m_texCoords[d]);
				normalBuff.push_back(m_normals[d]);
			}

			posBuff.push_back(m_positions[e]);
			if (m_specialVertices.isMarked(e))
			{
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				if (hasTexCoords())
					TCBuff.push_back(m_texCoordsF[e]);
				else
					TCBuff.push_back(m_texCoords[e]);
				if (hasNormals())
					normalBuff.push_back(m_normalsF[e]);
				else
					normalBuff.push_back(m_normals[e]);
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			}
			else
			{
				TCBuff.push_back(m_texCoords[e]);
				normalBuff.push_back(m_normals[e]);
			}

			posBuff.push_back(m_positions[f]);
			if (m_specialVertices.isMarked(f))
			{
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				if (hasTexCoords())
					TCBuff.push_back(m_texCoordsF[f]);
				else
					TCBuff.push_back(m_texCoords[f]);
				if (hasNormals())
					normalBuff.push_back(m_normalsF[f]);
				else
					normalBuff.push_back(m_normals[f]);
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			}
			else
			{
				TCBuff.push_back(m_texCoords[f]);
				normalBuff.push_back(m_normals[f]);
			}
			e=f;
			f = m_map.phi1(e);
			nbtris++;
		}while (f!=d);
	}

	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	texcoordVBO->setDataSize(2);
	texcoordVBO->allocate(TCBuff.size());
	Geom::Vec2f* ptrTC = reinterpret_cast<Geom::Vec2f*>(texcoordVBO->lockPtr());
	memcpy(ptrTC,&TCBuff[0],TCBuff.size()*sizeof(Geom::Vec2f));
	texcoordVBO->releasePtr();

	normalVBO->setDataSize(3);
	normalVBO->allocate(normalBuff.size());
	Geom::Vec3f* ptrNormal = reinterpret_cast<Geom::Vec3f*>(normalVBO->lockPtr());
	memcpy(ptrNormal, &normalBuff[0], normalBuff.size()*sizeof(Geom::Vec3f));
	normalVBO->releasePtr();

	return 3*nbtris;
}


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template <typename PFP>
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bool OBJModel<PFP>::createGroupMatVBO_P( Utils::VBO* positionVBO)
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{
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	m_beginIndices.clear();
	m_nbIndices.clear();

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	if (!m_normals.isValid())
	{
		CGoGNerr << "no normal attribute "<< CGoGNendl;
		return false;
	}
	if (!m_texCoords.isValid())
	{
		CGoGNerr << "no tex coords attribute "<< CGoGNendl;
		return false;
	}


	std::vector< std::vector<Dart> > group_faces; //(m_materialNames.size());
	group_faces.reserve(16384);
	m_groupIdx.reserve(16384);
	m_sgMat.reserve(16384);

	unsigned int c_sg=0;
	group_faces.resize(1);
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	TraversorF<typename PFP::MAP> traf(m_map);
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	Dart d=traf.begin();

	unsigned int c_grp = m_groups[d];
	unsigned int c_mat = m_attMat[d];
	m_sgMat.push_back(c_mat);

	m_groupFirstSub.push_back(0);


	if (m_tagG != 0)
		m_groupIdx.push_back(c_grp);
	else
		m_groupIdx.push_back(0);


	while (d!= traf.end())
	{
		if ((m_groups[d] != c_grp) || (m_attMat[d] != c_mat))
		{
			c_sg++;

			if (m_groups[d] != c_grp)
			{
				m_groupNbSub.push_back(c_sg-m_groupFirstSub.back());
				m_groupFirstSub.push_back(c_sg);
			}

			c_grp = m_groups[d];
			c_mat = m_attMat[d];
			m_sgMat.push_back(c_mat);

			if (m_tagG != 0)
				m_groupIdx.push_back(c_grp);
			else
				m_groupIdx.push_back(0);

			group_faces.resize(c_sg+1);
		}

		group_faces[c_sg].push_back(d);
		d = traf.next();
	}

	m_groupNbSub.push_back(c_sg+1-m_groupFirstSub.back()); // nb sub-group of last group


	// merging same material sub-groups of same group
	for (unsigned int g=0; g<m_groupNbSub.size(); ++g)
	{
		unsigned int fsg = m_groupFirstSub[g];
		unsigned int lsg = m_groupFirstSub[g]+m_groupNbSub[g]-1;

		for (unsigned int s=fsg; s<=lsg; ++s)
		{
			if (m_sgMat[s] != 0xffffffff)
			{
				for (unsigned ss=s+1; ss<=lsg; ++ss)
				{
					if (m_sgMat[ss] == m_sgMat[s])
					{
						group_faces[s].insert(group_faces[s].end(),group_faces[ss].begin(),group_faces[ss].end());
						group_faces[ss].clear();
						m_sgMat[ss] = 0xffffffff;
					}
				}
			}
		}
	}

	// compact group_faces/m_groupIdx/m_sgMat
	unsigned int outSg=0;
	for (unsigned int inSg=0; inSg<m_sgMat.size(); ++inSg)
	{
		if (m_sgMat[inSg] != 0xffffffff)
		{
			if (outSg != inSg)
			{
				group_faces[outSg].swap(group_faces[inSg]);
				m_groupIdx[outSg] = m_groupIdx[inSg];
				m_sgMat[outSg] = m_sgMat[inSg];
			}
			outSg++;
		}
	}
	group_faces.resize(outSg);
	m_groupIdx.resize(outSg);
	m_sgMat.resize(outSg);

	// recreate m_groupFirstSub & m_groupNbSub
	unsigned int outGr=0;
	m_groupFirstSub[0] = m_groupIdx[0];
	for (unsigned int inSg=1; inSg<m_sgMat.size(); ++inSg)
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	{
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		if (m_groupIdx[inSg] != m_groupIdx[inSg-1])
		{
			m_groupNbSub[outGr] = inSg - m_groupFirstSub[outGr];
			outGr++;
			m_groupFirstSub[outGr] = inSg;
		}
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	}
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	m_groupNbSub[outGr+1] = m_sgMat.size() - m_groupNbSub[outGr];


	// now create VBOs

	std::vector<Geom::Vec3f> posBuff;
	posBuff.reserve(16384);
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	unsigned int firstIndex = 0;

	unsigned int sz = group_faces.size();
	m_beginIndices.resize(sz);
	m_nbIndices.resize(sz);
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	m_groupIdx.resize(sz);
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	for (unsigned int g=0; g<sz; ++g)
	{
		unsigned int nbtris = 0;
		std::vector<Dart>& traf = group_faces[g];

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		if (m_tagG != 0)
			m_groupIdx[g] = m_groups[traf.front()];
		else
			m_groupIdx[g]=0;

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		for (std::vector<Dart>::iterator id=traf.begin(); id!= traf.end(); ++id)
		{
			Dart d = *id;
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			Dart e = m_map.phi1(d);
			Dart f = m_map.phi1(e);
			do
			{
				posBuff.push_back(m_positions[d]);
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				posBuff.push_back(m_positions[e]);
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				posBuff.push_back(m_positions[f]);
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				e=f;
				f = m_map.phi1(e);
				nbtris++;
			}while (f!=d);
		}
		m_beginIndices[g] = firstIndex;
		m_nbIndices[g] = 3*nbtris;
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		firstIndex += 3*nbtris;
	}
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	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

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	// compute BBs ( TO DO: a method ?)
	computeBB(posBuff);
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	return true;
}



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//template <typename PFP>
//bool OBJModel<PFP>::createGroupMatVBO_P(Utils::VBO* positionVBO)
//{
//	m_beginIndices.clear();
//	m_nbIndices.clear();

//	std::vector<Geom::Vec3f> posBuff;
//	posBuff.reserve(16384);

//	std::vector< std::vector<Dart> > group_faces(m_materialNames.size());
//	TraversorF<typename PFP::MAP> traf(m_map);
//	for (Dart d=traf.begin(); d!= traf.end(); d = traf.next())
//	{
//		unsigned int g = m_attMat[d];
//		group_faces[g].push_back(d);
//	}

//	unsigned int firstIndex = 0;

//	unsigned int sz = group_faces.size();
//	m_beginIndices.resize(sz);
//	m_nbIndices.resize(sz);
//	m_groupIdx.resize(sz);

//	for (unsigned int g=0; g<sz; ++g)
//	{
//		unsigned int nbtris = 0;
//		std::vector<Dart>& traf = group_faces[g];

//		if (m_tagG != 0)
//			m_groupIdx[g] = m_groups[traf.front()];
//		else
//			m_groupIdx[g]=0;

//		for (std::vector<Dart>::iterator id=traf.begin(); id!= traf.end(); ++id)
//		{
//			Dart d = *id;
//			Dart e = m_map.phi1(d);
//			Dart f = m_map.phi1(e);
//			do
//			{
//				posBuff.push_back(m_positions[d]);
//				posBuff.push_back(m_positions[e]);
//				posBuff.push_back(m_positions[f]);
//				e=f;
//				f = m_map.phi1(e);
//				nbtris++;
//			}while (f!=d);
//		}
//		m_beginIndices[g] = firstIndex;
//		m_nbIndices[g] = 3*nbtris;
//		firstIndex += 3*nbtris;
//	}
//	positionVBO->setDataSize(3);
//	positionVBO->allocate(posBuff.size());
//	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
//	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
//	positionVBO->releasePtr();

//	updateGroups();

//	return true;
//}




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template <typename PFP>
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bool OBJModel<PFP>::createGroupMatVBO_PT( Utils::VBO* positionVBO,
											Utils::VBO* texcoordVBO)
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{
	m_beginIndices.clear();
	m_nbIndices.clear();

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	if (!m_normals.isValid())
	{
		CGoGNerr << "no normal attribute "<< CGoGNendl;
		return false;
	}
	if (!m_texCoords.isValid())
	{
		CGoGNerr << "no tex coords attribute "<< CGoGNendl;
		return false;
	}


	std::vector< std::vector<Dart> > group_faces; //(m_materialNames.size());
	group_faces.reserve(16384);
	m_groupIdx.reserve(16384);
	m_sgMat.reserve(16384);

	unsigned int c_sg=0;
	group_faces.resize(1);

	TraversorF<typename PFP::MAP> traf(m_map);
	Dart d=traf.begin();

	unsigned int c_grp = m_groups[d];
	unsigned int c_mat = m_attMat[d];
	m_sgMat.push_back(c_mat);

	m_groupFirstSub.push_back(0);


	if (m_tagG != 0)
		m_groupIdx.push_back(c_grp);
	else
		m_groupIdx.push_back(0);


	while (d!= traf.end())
	{
		if ((m_groups[d] != c_grp) || (m_attMat[d] != c_mat))
		{
			c_sg++;

			if (m_groups[d] != c_grp)
			{
				m_groupNbSub.push_back(c_sg-m_groupFirstSub.back());
				m_groupFirstSub.push_back(c_sg);
			}

			c_grp = m_groups[d];
			c_mat = m_attMat[d];
			m_sgMat.push_back(c_mat);

			if (m_tagG != 0)
				m_groupIdx.push_back(c_grp);
			else
				m_groupIdx.push_back(0);

			group_faces.resize(c_sg+1);
		}

		group_faces[c_sg].push_back(d);
		d = traf.next();
	}

	m_groupNbSub.push_back(c_sg+1-m_groupFirstSub.back()); // nb sub-group of last group


	// merging same material sub-groups of same group
	for (unsigned int g=0; g<m_groupNbSub.size(); ++g)
	{
		unsigned int fsg = m_groupFirstSub[g];
		unsigned int lsg = m_groupFirstSub[g]+m_groupNbSub[g]-1;

		for (unsigned int s=fsg; s<=lsg; ++s)
		{
			if (m_sgMat[s] != 0xffffffff)
			{
				for (unsigned ss=s+1; ss<=lsg; ++ss)
				{
					if (m_sgMat[ss] == m_sgMat[s])
					{
						group_faces[s].insert(group_faces[s].end(),group_faces[ss].begin(),group_faces[ss].end());
						group_faces[ss].clear();
						m_sgMat[ss] = 0xffffffff;
					}
				}
			}
		}
	}

	// compact group_faces/m_groupIdx/m_sgMat
	unsigned int outSg=0;
	for (unsigned int inSg=0; inSg<m_sgMat.size(); ++inSg)
	{
		if (m_sgMat[inSg] != 0xffffffff)
		{
			if (outSg != inSg)
			{
				group_faces[outSg].swap(group_faces[inSg]);
				m_groupIdx[outSg] = m_groupIdx[inSg];
				m_sgMat[outSg] = m_sgMat[inSg];
			}
			outSg++;
		}
	}
	group_faces.resize(outSg);
	m_groupIdx.resize(outSg);
	m_sgMat.resize(outSg);

	// recreate m_groupFirstSub & m_groupNbSub
	unsigned int outGr=0;
	m_groupFirstSub[0] = m_groupIdx[0];
	for (unsigned int inSg=1; inSg<m_sgMat.size(); ++inSg)
	{
		if (m_groupIdx[inSg] != m_groupIdx[inSg-1])
		{
			m_groupNbSub[outGr] = inSg - m_groupFirstSub[outGr];
			outGr++;
			m_groupFirstSub[outGr] = inSg;
		}
	}
	m_groupNbSub[outGr+1] = m_sgMat.size() - m_groupNbSub[outGr];


	// now create VBOs

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	std::vector<Geom::Vec3f> posBuff;
	std::vector<Geom::Vec2f> TCBuff;
	posBuff.reserve(16384);
	TCBuff.reserve(16384);


	unsigned int firstIndex = 0;

	unsigned int sz = group_faces.size();
	m_beginIndices.resize(sz);
	m_nbIndices.resize(sz);
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	m_groupIdx.resize(sz);
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	for (unsigned int g=0; g<sz; ++g)
	{
		unsigned int nbtris = 0;
		std::vector<Dart>& traf = group_faces[g];

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		if (m_tagG != 0)
			m_groupIdx[g] = m_groups[traf.front()];
		else
			m_groupIdx[g]=0;

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		for (std::vector<Dart>::iterator id=traf.begin(); id!= traf.end(); ++id)
		{
			Dart d = *id;

			Dart e = m_map.phi1(d);
			Dart f = m_map.phi1(e);
			do
			{
				posBuff.push_back(m_positions[d]);
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				if (hasTexCoords())
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					TCBuff.push_back(m_texCoordsF[d]);
				else
					TCBuff.push_back(m_texCoords[d]);

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				posBuff.push_back(m_positions[e]);
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				if (hasTexCoords())
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					TCBuff.push_back(m_texCoordsF[e]);
				else
					TCBuff.push_back(m_texCoords[e]);

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				posBuff.push_back(m_positions[f]);
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				if (hasTexCoords())
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					TCBuff.push_back(m_texCoordsF[f]);
				else
					TCBuff.push_back(m_texCoords[f]);
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				e=f;
				f = m_map.phi1(e);
				nbtris++;
			}while (f!=d);
		}
		m_beginIndices[g] = firstIndex;
		m_nbIndices[g] = 3*nbtris;
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		firstIndex += 3*nbtris;
	}

	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	texcoordVBO->setDataSize(2);
	texcoordVBO->allocate(TCBuff.size());
	Geom::Vec2f* ptrTC = reinterpret_cast<Geom::Vec2f*>(texcoordVBO->lockPtr());
	memcpy(ptrTC,&TCBuff[0],TCBuff.size()*sizeof(Geom::Vec2f));
	texcoordVBO->releasePtr();

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	// compute BBs ( TO DO: a method ?)
	computeBB(posBuff);
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	return true;
}





template <typename PFP>
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bool OBJModel<PFP>::createGroupMatVBO_PN( Utils::VBO* positionVBO,
											Utils::VBO* normalVBO)
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{
	m_beginIndices.clear();
	m_nbIndices.clear();

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	if (!m_normals.isValid())
	{
		CGoGNerr << "no normal attribute "<< CGoGNendl;
		return false;
	}


	std::vector< std::vector<Dart> > group_faces; //(m_materialNames.size());
	group_faces.reserve(16384);
	m_groupIdx.reserve(16384);
	m_sgMat.reserve(16384);

	unsigned int c_sg=0;
	group_faces.resize(1);
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	TraversorF<typename PFP::MAP> traf(m_map);
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	Dart d=traf.begin();

	unsigned int c_grp = m_groups[d];
	unsigned int c_mat = m_attMat[d];
	m_sgMat.push_back(c_mat);

	m_groupFirstSub.push_back(0);


	if (m_tagG != 0)
		m_groupIdx.push_back(c_grp);
	else
		m_groupIdx.push_back(0);


	while (d!= traf.end())
	{
		if ((m_groups[d] != c_grp) || (m_attMat[d] != c_mat))
		{
			c_sg++;

			if (m_groups[d] != c_grp)
			{
				m_groupNbSub.push_back(c_sg-m_groupFirstSub.back());
				m_groupFirstSub.push_back(c_sg);
			}

			c_grp = m_groups[d];
			c_mat = m_attMat[d];
			m_sgMat.push_back(c_mat);

			if (m_tagG != 0)
				m_groupIdx.push_back(c_grp);
			else
				m_groupIdx.push_back(0);

			group_faces.resize(c_sg+1);
		}

		group_faces[c_sg].push_back(d);
		d = traf.next();
	}

	m_groupNbSub.push_back(c_sg+1-m_groupFirstSub.back()); // nb sub-group of last group


	// merging same material sub-groups of same group
	for (unsigned int g=0; g<m_groupNbSub.size(); ++g)
	{
		unsigned int fsg = m_groupFirstSub[g];
		unsigned int lsg = m_groupFirstSub[g]+m_groupNbSub[g]-1;

		for (unsigned int s=fsg; s<=lsg; ++s)
		{
			if (m_sgMat[s] != 0xffffffff)
			{
				for (unsigned ss=s+1; ss<=lsg; ++ss)
				{
					if (m_sgMat[ss] == m_sgMat[s])
					{
						group_faces[s].insert(group_faces[s].end(),group_faces[ss].begin(),group_faces[ss].end());
						group_faces[ss].clear();
						m_sgMat[ss] = 0xffffffff;
					}
				}
			}
		}
	}

	// compact group_faces/m_groupIdx/m_sgMat
	unsigned int outSg=0;
	for (unsigned int inSg=0; inSg<m_sgMat.size(); ++inSg)
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	{
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		if (m_sgMat[inSg] != 0xffffffff)
		{
			if (outSg != inSg)
			{
				group_faces[outSg].swap(group_faces[inSg]);
				m_groupIdx[outSg] = m_groupIdx[inSg];
				m_sgMat[outSg] = m_sgMat[inSg];
			}
			outSg++;
		}
	}
	group_faces.resize(outSg);
	m_groupIdx.resize(outSg);
	m_sgMat.resize(outSg);

	// recreate m_groupFirstSub & m_groupNbSub
	unsigned int outGr=0;
	m_groupFirstSub[0] = m_groupIdx[0];
	for (unsigned int inSg=1; inSg<m_sgMat.size(); ++inSg)
	{
		if (m_groupIdx[inSg] != m_groupIdx[inSg-1])
		{
			m_groupNbSub[outGr] = inSg - m_groupFirstSub[outGr];
			outGr++;
			m_groupFirstSub[outGr] = inSg;
		}
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	}
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	m_groupNbSub[outGr+1] = m_sgMat.size() - m_groupNbSub[outGr];


	// now create VBOs

	std::vector<Geom::Vec3f> posBuff;
	std::vector<Geom::Vec3f> normalBuff;
	posBuff.reserve(16384);
	normalBuff.reserve(16384);

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	unsigned int firstIndex = 0;

	unsigned int sz = group_faces.size();
	m_beginIndices.resize(sz);
	m_nbIndices.resize(sz);
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	m_groupIdx.resize(sz);
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	for (unsigned int g=0; g<sz; ++g)
	{
		unsigned int nbtris = 0;
		std::vector<Dart>& traf = group_faces[g];

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		if (m_tagG != 0)
			m_groupIdx[g] = m_groups[traf.front()];
		else
			m_groupIdx[g]=0;

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		for (std::vector<Dart>::iterator id=traf.begin(); id!= traf.end(); ++id)
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		{
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			Dart d = *id;
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			Dart e = m_map.phi1(d);
			Dart f = m_map.phi1(e);
			do
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			{
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				posBuff.push_back(m_positions[d]);
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				if (hasNormals())
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					normalBuff.push_back(m_normalsF[d]);
				else
					normalBuff.push_back(m_normals[d]);
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				posBuff.push_back(m_positions[e]);
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				if (hasNormals())
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					normalBuff.push_back(m_normalsF[e]);
				else
					normalBuff.push_back(m_normals[e]);
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				posBuff.push_back(m_positions[f]);
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				if (hasNormals())
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					normalBuff.push_back(m_normalsF[f]);
				else
					normalBuff.push_back(m_normals[f]);
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				e=f;
				f = m_map.phi1(e);
				nbtris++;
			}while (f!=d);
		}
		m_beginIndices[g] = firstIndex;
		m_nbIndices[g] = 3*nbtris;
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		firstIndex += 3*nbtris;
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	}

	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	normalVBO->setDataSize(3);
	normalVBO->allocate(normalBuff.size());
	Geom::Vec3f* ptrNormal = reinterpret_cast<Geom::Vec3f*>(normalVBO->lockPtr());
	memcpy(ptrNormal, &normalBuff[0], normalBuff.size()*sizeof(Geom::Vec3f));
	normalVBO->releasePtr();

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	// compute BBs ( TO DO: a method ?)
	computeBB(posBuff);
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	return true;
}

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template <typename PFP>
bool OBJModel<PFP>::createGroupMatVBO_PTN( Utils::VBO* positionVBO,
											Utils::VBO* texcoordVBO,
											Utils::VBO* normalVBO)
{
	m_beginIndices.clear();
	m_nbIndices.clear();

	if (!m_normals.isValid())
	{
		CGoGNerr << "no normal attribute "<< CGoGNendl;
		return false;
	}
	if (!m_texCoords.isValid())
	{
		CGoGNerr << "no tex coords attribute "<< CGoGNendl;
		return false;
	}

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	std::vector< std::vector<Dart> > group_faces; //(m_materialNames.size());
	group_faces.reserve(16384);
	m_groupIdx.reserve(16384);
	m_sgMat.reserve(16384);

	unsigned int c_sg=0;
	group_faces.resize(1);

	TraversorF<typename PFP::MAP> traf(m_map);
	Dart d=traf.begin();

	unsigned int c_grp = m_groups[d];
	unsigned int c_mat = m_attMat[d];
	m_sgMat.push_back(c_mat);

	m_groupFirstSub.push_back(0);


	if (m_tagG != 0)
		m_groupIdx.push_back(c_grp);
	else
		m_groupIdx.push_back(0);


	while (d!= traf.end())
	{
		if ((m_groups[d] != c_grp) || (m_attMat[d] != c_mat))
		{
			c_sg++;

			if (m_groups[d] != c_grp)
			{
				m_groupNbSub.push_back(c_sg-m_groupFirstSub.back());
				m_groupFirstSub.push_back(c_sg);
			}

			c_grp = m_groups[d];
			c_mat = m_attMat[d];
			m_sgMat.push_back(c_mat);

			if (m_tagG != 0)
				m_groupIdx.push_back(c_grp);
			else
				m_groupIdx.push_back(0);

			group_faces.resize(c_sg+1);
		}

		group_faces[c_sg].push_back(d);
		d = traf.next();
	}

	m_groupNbSub.push_back(c_sg+1-m_groupFirstSub.back()); // nb sub-group of last group


	// merging same material sub-groups of same group
	for (unsigned int g=0; g<m_groupNbSub.size(); ++g)
	{
		unsigned int fsg = m_groupFirstSub[g];
		unsigned int lsg = m_groupFirstSub[g]+m_groupNbSub[g]-1;

		for (unsigned int s=fsg; s<=lsg; ++s)
		{
			if (m_sgMat[s] != 0xffffffff)
			{
				for (unsigned ss=s+1; ss<=lsg; ++ss)
				{
					if (m_sgMat[ss] == m_sgMat[s])
					{
						group_faces[s].insert(group_faces[s].end(),group_faces[ss].begin(),group_faces[ss].end());
						group_faces[ss].clear();
						m_sgMat[ss] = 0xffffffff;
					}
				}
			}
		}
	}

	// compact group_faces/m_groupIdx/m_sgMat
	unsigned int outSg=0;
	for (unsigned int inSg=0; inSg<m_sgMat.size(); ++inSg)
	{
		if (m_sgMat[inSg] != 0xffffffff)
		{
			if (outSg != inSg)
			{
				group_faces[outSg].swap(group_faces[inSg]);
				m_groupIdx[outSg] = m_groupIdx[inSg];
				m_sgMat[outSg] = m_sgMat[inSg];
			}
			outSg++;
		}
	}
	group_faces.resize(outSg);
	m_groupIdx.resize(outSg);
	m_sgMat.resize(outSg);

	// recreate m_groupFirstSub & m_groupNbSub
	unsigned int outGr=0;
	m_groupFirstSub[0] = m_groupIdx[0];
	for (unsigned int inSg=1; inSg<m_sgMat.size(); ++inSg)
	{
		if (m_groupIdx[inSg] != m_groupIdx[inSg-1])
		{
			m_groupNbSub[outGr] = inSg - m_groupFirstSub[outGr];
			outGr++;
			m_groupFirstSub[outGr] = inSg;
		}
	}
	m_groupNbSub[outGr+1] = m_sgMat.size() - m_groupNbSub[outGr];


	// now create VBOs

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	std::vector<Geom::Vec3f> posBuff;
	std::vector<Geom::Vec2f> TCBuff;
	std::vector<Geom::Vec3f> normalBuff;
	posBuff.reserve(16384);
	TCBuff.reserve(16384);
	normalBuff.reserve(16384);


	unsigned int firstIndex = 0;

	unsigned int sz = group_faces.size();
	m_beginIndices.resize(sz);
	m_nbIndices.resize(sz);
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	m_groupIdx.resize(sz);
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	for (unsigned int g=0; g<sz; ++g)
	{
		unsigned int nbtris = 0;
		std::vector<Dart>& traf = group_faces[g];

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		if (m_tagG != 0)
			m_groupIdx[g] = m_groups[traf.front()];
		else
			m_groupIdx[g]=0;

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		for (std::vector<Dart>::iterator id=traf.begin(); id!= traf.end(); ++id)
		{
			Dart d = *id;

			Dart e = m_map.phi1(d);
			Dart f = m_map.phi1(e);
			do
			{
				posBuff.push_back(m_positions[d]);
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				if (hasTexCoords())
					TCBuff.push_back(m_texCoordsF[d]);
				else
					TCBuff.push_back(m_texCoords[d]);
				if (hasNormals())
					normalBuff.push_back(m_normalsF[d]);
				else
					normalBuff.push_back(m_normals[d]);

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				posBuff.push_back(m_positions[e]);
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				if (hasTexCoords())
					TCBuff.push_back(m_texCoordsF[e]);
				else
					TCBuff.push_back(m_texCoords[e]);
				if (hasNormals())
					normalBuff.push_back(m_normalsF[e]);
				else
					normalBuff.push_back(m_normals[e]);

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				posBuff.push_back(m_positions[f]);
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				if (hasTexCoords())
					TCBuff.push_back(m_texCoordsF[f]);
				else
					TCBuff.push_back(m_texCoords[f]);
				if (hasNormals())
					normalBuff.push_back(m_normalsF[f]);
				else
					normalBuff.push_back(m_normals[f]);

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				e=f;
				f = m_map.phi1(e);
				nbtris++;
			}while (f!=d);
		}
		m_beginIndices[g] = firstIndex;
		m_nbIndices[g] = 3*nbtris;

		firstIndex += 3*nbtris;
	}

	positionVBO->setDataSize(3);
	positionVBO->allocate(posBuff.size());
	Geom::Vec3f* ptrPos = reinterpret_cast<Geom::Vec3f*>(positionVBO->lockPtr());
	memcpy(ptrPos,&posBuff[0],posBuff.size()*sizeof(Geom::Vec3f));
	positionVBO->releasePtr();

	texcoordVBO->setDataSize(2);
	texcoordVBO->allocate(TCBuff.size());
	Geom::Vec2f* ptrTC = reinterpret_cast<Geom::Vec2f*>(texcoordVBO->lockPtr());
	memcpy(ptrTC,&TCBuff[0],TCBuff.size()*sizeof(Geom::Vec2f));
	texcoordVBO->releasePtr();

	normalVBO->setDataSize(3);
	normalVBO->allocate(normalBuff.size());
	Geom::Vec3f* ptrNormal = reinterpret_cast<Geom::Vec3f*>(normalVBO->lockPtr());
	memcpy(ptrNormal, &normalBuff[0], normalBuff.size()*sizeof(Geom::Vec3f));
	normalVBO->releasePtr();

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	// compute BBs ( TO DO: a method ?)
	computeBB(posBuff);
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	return true;
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}


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template <typename PFP>
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void OBJModel<PFP>::computeBB(const std::vector<Geom::Vec3f>& pos)
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{
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	m_groupBBs.resize(nbObjGroups());

	for (unsigned int i=0; i<nbObjGroups(); ++i )
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	{
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		Geom::BoundingBox<VEC3>& bb = m_groupBBs[i];
		bb.reset();
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		unsigned int begInd = beginIndex(i,0);
		unsigned int endInd = begInd;
		for (unsigned int j= 0; j< nbSubGroup(i); ++j)
			endInd += nbIndices(i,j);

		for (unsigned int j=begInd; j<endInd; ++j )
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		{
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			bb.addPoint(pos[j]);
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		}
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	}
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}




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template <typename PFP>
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bool OBJModel<PFP>::import( const std::string& filename, std::vector<std::string>& attrNames)
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{
	typedef  typename PFP::VEC3 VEC3;
	typedef Geom::Vec2f VEC2;

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

	std::string ligne;
	std::string tag;
	do
	{
		std::getline (fp, ligne);
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		std::stringstream oss(ligne);
		oss >> tag;
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		if (tag == "v")
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			m_tagV++;
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		if (tag == "vn")
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			m_tagVN++;
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		if (tag == "vt")
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			m_tagVT++;
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		if ((tag == "g") || (tag == "o"))
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			m_tagG++;
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		if (tag == "f")
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			m_tagF++;
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		if (tag == "mtllib")
		{
			unsigned found = filename.find_last_of("/\\");
			std::string mtfn;
			oss >> mtfn;
			m_matPath = filename.substr(0,found) + "/";
			m_matFileName = m_matPath + mtfn;
		}
		tag.clear();

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	}while (!fp.eof());



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	m_positions =  m_map.template getAttribute<typename PFP::VEC3, VERTEX>("position") ;
	if (!m_positions.isValid())
		m_positions = m_map.template addAttribute<VEC3, VERTEX>("position") ;
	attrNames.push_back(m_positions.name()) ;
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	m_texCoords =  m_map.template getAttribute<VEC2, VERTEX>("texCoord") ;
	if (!m_texCoords.isValid())
		m_texCoords = m_map.template addAttribute<VEC2, VERTEX>("texCoord") ;
	attrNames.push_back(m_texCoords.name()) ;

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	if (m_tagVT != 0)
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	{
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		m_texCoordsF =  m_map.template getAttribute<VEC2, VERTEX1>("texCoordF") ;
		if (!m_texCoordsF.isValid())
			m_texCoordsF = m_map.template addAttribute<VEC2, VERTEX1>("texCoordF") ;
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	}

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	m_normals =  m_map.template getAttribute<typename PFP::VEC3, VERTEX>("normal") ;
	if (!m_normals.isValid())
		m_normals = m_map.template addAttribute<VEC3, VERTEX>("normal") ;
	attrNames.push_back(m_normals.name()) ;

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	if (m_tagVN != 0)
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	{
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		m_normalsF =  m_map.template getAttribute<VEC3, VERTEX1>("normalF") ;
		if (!m_normalsF.isValid())
			m_normalsF = m_map.template addAttribute<VEC3, VERTEX1>("normalF") ;
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	}

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//	if (m_tagG != 0) always use group even if not in the file
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	{
		m_groups =  m_map.template getAttribute<unsigned int, FACE>("groups") ;
		if (!m_groups.isValid())
			m_groups = m_map.template addAttribute<unsigned int, FACE>("groups") ;
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		attrNames.push_back(m_groups.name()) ;
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	}
	
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	m_attMat =  m_map.template getAttribute<unsigned int, FACE>("material") ;
	if (!m_attMat.isValid())
		m_attMat = m_map.template addAttribute<unsigned int, FACE>("material") ;
	attrNames.push_back(m_attMat.name()) ;
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	AttributeContainer& container = m_map.template getAttributeContainer<VERTEX>() ;

	fp.close();
	fp.clear();
	fp.open(filename.c_str());

	std::vector<VEC3> normalsBuffer;
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	normalsBuffer.reserve(m_tagVN);
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	std::vector<VEC2> texCoordsBuffer;
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	texCoordsBuffer.reserve(m_tagVT);
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	std::vector<unsigned int> verticesID;
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	verticesID.reserve(m_tagV);
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	std::vector<unsigned int> normalsID;
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	normalsID.reserve(m_tagV);
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	std::vector<unsigned int> texCoordsID;
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	texCoordsID.reserve(m_tagV);
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	std::vector<unsigned int> localIndices;
	localIndices.reserve(64*3);
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	FunctorInitEmb<typename PFP::MAP, VERTEX> fsetemb(m_map);
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	VertexAutoAttribute< NoTypeNameAttribute