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vcglib/wrap/io_trimesh/export_obj.h

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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program 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 General Public License (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
/****************************************************************************
History
$Log: not supported by cvs2svn $
Revision 1.3 2006/03/07 13:19:29 cignoni
First Release with OBJ import support
Revision 1.2 2006/02/28 14:38:09 corsini
remove qt include
Revision 1.1 2006/02/16 19:28:36 fmazzant
transfer of Export_3ds.h, Export_obj.h, Io_3ds_obj_material.h from Meshlab to vcg
Revision 1.7 2006/02/06 11:04:40 fmazzant
added file material.h. it include struct Material, CreateNewMaterial(...) and MaterialsCompare(...)
Revision 1.6 2006/02/04 10:18:46 fmazzant
clean code
Revision 1.5 2006/02/03 10:04:41 fmazzant
no significant updated
Revision 1.4 2006/01/30 14:02:05 fmazzant
bug-fix
Revision 1.3 2006/01/29 23:52:43 fmazzant
correct a small bug
Revision 1.2 2006/01/29 18:33:42 fmazzant
added some comment to the code
Revision 1.1 2006/01/29 16:33:03 fmazzant
moved export_obj and export_3ds from test/io into meshio/
Revision 1.34 2006/01/22 23:59:01 fmazzant
changed default value of diffuse. 1.0 -> 0.8
Revision 1.33 2006/01/19 09:36:29 fmazzant
cleaned up history log
Revision 1.32 2006/01/18 00:45:56 fmazzant
added control on face's diffuse
Revision 1.31 2006/01/17 13:48:54 fmazzant
added capability mask on export file format
Revision 1.30 2006/01/15 00:45:40 fmazzant
extend mask exporter for all type file format +
Revision 1.29 2006/01/14 00:03:26 fmazzant
added more controls
****************************************************************************/
#ifndef __VCGLIB_EXPORT_OBJ
#define __VCGLIB_EXPORT_OBJ
#include <wrap/callback.h>
#include <vcg/complex/trimesh/allocate.h>
#include <wrap/io_trimesh/io_mask.h>
#include "io_material.h"
#include <iostream>
#include <fstream>
#include <map>
namespace vcg {
namespace tri {
namespace io {
template <class SaveMeshType>
class ExporterOBJ
{
public:
typedef typename SaveMeshType::FaceIterator FaceIterator;
typedef typename SaveMeshType::VertexIterator VertexIterator;
typedef typename SaveMeshType::VertexType VertexType;
/*
enum of all the types of error
*/
enum SaveError
{
E_NOERROR, // 0
E_CANTOPENFILE, // 1
E_CANTCLOSEFILE, // 2
E_UNESPECTEDEOF, // 3
E_ABORTED, // 4
E_NOTDEFINITION, // 5
E_NOTVEXTEXVALID, // 6
E_NOTFACESVALID // 7
};
/*
this function takes an index and the relative error message gets back
*/
static const char* ErrorMsg(int error)
{
static const char* obj_error_msg[] =
{
"No errors", // 0
"Can't open file", // 1
"can't close file", // 2
"Premature End of file", // 3
"File saving aborted", // 4
"Function not defined", // 5
"Vertices not valid", // 6
"Faces not valid" // 7
};
if(error>7 || error<0) return "Unknown error";
else return obj_error_msg[error];
};
/*
returns mask of capability one define with what are the saveable information of the format.
*/
static int GetExportMaskCapability()
{
int capability = 0;
//vert
capability |= vcg::tri::io::Mask::IOM_VERTNORMAL;
//face
capability |= vcg::tri::io::Mask::IOM_FACECOLOR;
//wedg
capability |= vcg::tri::io::Mask::IOM_WEDGTEXCOORD;
capability |= vcg::tri::io::Mask::IOM_WEDGNORMAL;
return capability;
}
/*
function which saves in OBJ file format
*/
static int SaveASCII(SaveMeshType &m, const char * filename, int mask, CallBackPos *cb=0)
{
if(m.vert.size() == 0)
return E_NOTVEXTEXVALID;
if(m.face.size() == 0)
return E_NOTFACESVALID;
int current = 0;
int max = m.vert.size()+ m.face.size();
std::vector<Material> materials;
std::string fn(filename);
int LastSlash=fn.size()-1;
while(LastSlash>=0 && fn[LastSlash]!='/')
--LastSlash;
FILE *fp;
fp = fopen(filename,"w");
if(fp == NULL)return E_CANTOPENFILE;
fprintf(fp,"####\n#\n# OBJ File Generated by Meshlab\n#\n####\n");
fprintf(fp,"# Object %s\n#\n# Vertices: %d\n# Faces: %d\n#\n####\n",fn.substr(LastSlash+1).c_str(),m.vert.size(),m.face.size());
//library materials
if(mask & vcg::tri::io::Mask::IOM_FACECOLOR)
fprintf(fp,"mtllib ./%s.mtl\n\n",fn.substr(LastSlash+1).c_str());
//vertexs + normal
VertexIterator vi;
std::map<Point3f,int> NormalVertex;
int numvert = 0;
int value = 1;
for(vi=m.vert.begin(); vi!=m.vert.end(); ++vi) if( !(*vi).IsD() )
{
//saves normal per vertex
if(mask & vcg::tri::io::Mask::IOM_VERTNORMAL | mask & vcg::tri::io::Mask::IOM_WEDGNORMAL)
{
if(AddNewNormalVertex(NormalVertex,(*vi).N(),value))
{
fprintf(fp,"vn %f %f %f\n",(*vi).N()[0],(*vi).N()[1],(*vi).N()[2]);
value++;
}
}
//saves vertex
fprintf(fp,"v %f %f %f\n",(*vi).P()[0],(*vi).P()[1],(*vi).P()[2]);
if (cb !=NULL) {
if(*cb)((100*++current)/max, "writing vertices ");
else { fclose(fp); return E_ABORTED;} }
}
fprintf(fp,"# %d vertices, %d vertices normals\n\n",m.vert.size(),NormalVertex.size());
//faces + texture coords
FaceIterator fi;
std::map<vcg::TCoord2<float>,int> CoordIndexTexture;
unsigned int material_num = 0;
int mem_index = 0; //var temporany
/*int*/ value = 1;//tmp
for(fi=m.face.begin(); fi!=m.face.end(); ++fi) if( !(*fi).IsD() )
{
if(mask & vcg::tri::io::Mask::IOM_FACECOLOR)
{
int index = vcg::tri::io::Materials<SaveMeshType>::CreateNewMaterial(m,materials,material_num,fi);
if(index == materials.size())//inserts a new element material
{
material_num++;
fprintf(fp,"\nusemtl material_%d\n",materials[index-1].index);
mem_index = index-1;
}
else
{
if(index != mem_index)//inserts old name elemente material
{
fprintf(fp,"\nusemtl material_%d\n",materials[index].index);
mem_index=index;
}
}
}
//saves texture coord
unsigned int MAX = 3;
for(unsigned int k=0;k<MAX;k++)
{
if(m.HasPerWedgeTexture() && mask & vcg::tri::io::Mask::IOM_WEDGTEXCOORD)
{
if(AddNewTextureCoord(CoordIndexTexture,(*fi).WT(k),value))
{
fprintf(fp,"vt %f %f\n",(*fi).WT(k).u(),(*fi).WT(k).v());
value++;//ncreases the value number to be associated to the Texture
}
}
}
fprintf(fp,"f ");
for(unsigned int k=0;k<MAX;k++)
{
int v = -1;
// +1 because Obj file format begins from index = 1 but not from index = 0.
v = GetIndexVertex(m, (*fi).V(k)) + 1;//index of vertex per face
int vt = -1;
if(mask & vcg::tri::io::Mask::IOM_WEDGTEXCOORD)
vt = GetIndexVertexTexture(CoordIndexTexture,(*fi).WT(k));//index of vertex texture per face
int vn = -1;
if(mask & vcg::tri::io::Mask::IOM_VERTNORMAL | mask & vcg::tri::io::Mask::IOM_WEDGNORMAL)
vn = GetIndexVertexNormal(m, NormalVertex, v);//index of vertex normal per face.
//writes elements on file obj
WriteFacesElement(fp,v,vt,vn);
if(k!=MAX-1)
fprintf(fp," ");
else
fprintf(fp,"\n");
}
if (cb !=NULL) {
if(*cb)((100*++current)/max, "writing vertices ");
else { fclose(fp); return E_ABORTED;} }
}//for
fprintf(fp,"# %d faces, %d coords texture\n\n",m.face.size(),CoordIndexTexture.size());
fprintf(fp,"# End of File");
fclose(fp);
int r = 0;
if(mask & vcg::tri::io::Mask::IOM_WEDGTEXCOORD | mask & vcg::tri::io::Mask::IOM_FACECOLOR)
r = WriteMaterials(materials, filename,cb);//write material
if(r!= E_NOERROR)
return r;
return E_NOERROR;
}
/*
function which saves in OBJ file format
*/
static int SaveBinary(SaveMeshType &m, const char * filename)
{
return E_NOTDEFINITION;
}
/*
function which saves in OBJ file format
*/
static int Save(SaveMeshType &m, const char * filename, const int &mask, CallBackPos *cb=0)
{
return SaveASCII(m,filename,mask,cb);
}
/*
returns index of the vertex
*/
inline static int GetIndexVertex(SaveMeshType &m, VertexType *p)
{
return p-&*(m.vert.begin());
}
/*
returns index of the texture coord
*/
inline static int GetIndexVertexTexture(std::map<vcg::TCoord2<float>,int> &m, const vcg::TCoord2<float> &wt)
{
int index = m[wt];
if(index!=0){return index;}
return -1;
}
/*
returns index of the vertex normal
*/
inline static int GetIndexVertexNormal(SaveMeshType &m, std::map<Point3f,int> &ma, unsigned int iv )
{
int index = ma[m.vert[iv].N()];
if(index!=0){return index;}
return -1;
}
/*
write elements on file
*/
inline static void WriteFacesElement(FILE *fp,int v,int vt, int vn)
{
fprintf(fp,"%d",v);
if(vt!=-1)
{
fprintf(fp,"/%d",vt);
if(vn!=-1)
fprintf(fp,"/%d",vn);
}
else if(vn!=-1)
fprintf(fp,"//%d",vn);
}
/*
adds a new index to the coordinate of Texture if it is the first time
which is otherwise met not execute anything
*/
inline static bool AddNewTextureCoord(std::map<vcg::TCoord2<float>,int> &m, const vcg::TCoord2<float> &wt,int value)
{
int index = m[wt];
if(index==0){m[wt]=value;return true;}
return false;
}
/*
adds a new index to the normal per vertex if it is the first time
which is otherwise met does not execute anything
*/
inline static bool AddNewNormalVertex(std::map<Point3f,int> &m, Point3f &n ,int value)
{
int index = m[n];
if(index==0){m[n]=value;return true;}
return false;
}
/*
writes material into file
*/
inline static int WriteMaterials(std::vector<Material> &materials, const char * filename, CallBackPos *cb=0)
{
std::string fileName = std::string(filename);
fileName+=".mtl";
if(materials.size() > 0)
{
FILE *fp;
fp = fopen(fileName.c_str(),"w");
if(fp==NULL)return E_ABORTED;
fprintf(fp,"#\n# Wavefront material file\n# Converted by Meshlab Group\n#\n\n");
int current = 0;
for(unsigned int i=0;i<materials.size();i++)
{
if (cb !=NULL)
(*cb)((100 * ++current)/materials.size(), "saving material file ");
else
{ fclose(fp); return E_ABORTED;}
fprintf(fp,"newmtl material_%d\n",materials[i].index);
fprintf(fp,"Ka %f %f %f\n",materials[i].Ka[0],materials[i].Ka[1],materials[i].Ka[2]);
fprintf(fp,"Kd %f %f %f\n",materials[i].Kd[0],materials[i].Kd[1],materials[i].Kd[2]);
fprintf(fp,"Ks %f %f %f\n",materials[i].Ks[0],materials[i].Ks[1],materials[i].Ks[2]);
fprintf(fp,"Tr %f\n",materials[i].Tr);
fprintf(fp,"illum %d\n",materials[i].illum);
fprintf(fp,"Ns %f\n",materials[i].Ns);
if(materials[i].map_Kd.size()>0)
fprintf(fp,"map_Kd %s\n",materials[i].map_Kd.c_str());
fprintf(fp,"\n");
}
fclose(fp);
}
return E_NOERROR;
}
}; // end class
} // end Namespace tri
} // end Namespace io
} // end Namespace vcg
#endif
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