vcglib/wrap/io_trimesh/export_off.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. *
* *
****************************************************************************/
/**
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@name Save in OFF format
*/
//@{
#ifndef __VCGLIB_EXPORT_OFF
#define __VCGLIB_EXPORT_OFF
#include <stdio.h>
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#include <wrap/io_trimesh/io_mask.h>
namespace vcg {
namespace tri {
namespace io {
template <class SaveMeshType>
class ExporterOFF
{
public:
typedef typename SaveMeshType::VertexPointer VertexPointer;
typedef typename SaveMeshType::ScalarType ScalarType;
typedef typename SaveMeshType::VertexType VertexType;
typedef typename SaveMeshType::FaceType FaceType;
typedef typename SaveMeshType::FacePointer FacePointer;
typedef typename SaveMeshType::VertexIterator VertexIterator;
typedef typename SaveMeshType::FaceIterator FaceIterator;
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static int Save(SaveMeshType &m, const char * filename, int mask=0 )
{
vcg::face::Pos<FaceType> he;
vcg::face::Pos<FaceType> hei;
FILE * fpout = fopen(filename,"w");
if(fpout==NULL) return false;
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if( m.HasPerVertexNormal() && (mask & io::Mask::IOM_VERTNORMAL)) fprintf(fpout,"N");
if( m.HasPerVertexColor() && (mask & io::Mask::IOM_VERTCOLOR)) fprintf(fpout,"C");
if( m.HasPerVertexTexture() && (mask & io::Mask::IOM_VERTTEXCOORD)) fprintf(fpout,"ST");
fprintf(fpout,"OFF\n");
fprintf(fpout,"%d %d ", m.vn, m.fn);
typename SaveMeshType::FaceIterator fi;
int count_e = 0;
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int boundary_e = 0;
bool counted=false;
for(fi=m.face.begin();fi!=m.face.end();++fi)
(*fi).ClearS();
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for(fi=m.face.begin();fi!=m.face.end();fi++)
{
(*fi).SetS();
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count_e +=3; //assume that we have to increase the number of edges with three
for(int j=0; j<3; j++)
{
if (face::IsBorder(*fi,j)) //If this edge is a border edge
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boundary_e++; // then increase the number of boundary edges
else if (face::IsManifold(*fi,j)) //If this edge is manifold
{
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if((*fi).FFp(j)->IsS()) //If the face on the other side of the edge is already selected
count_e--; // we counted one edge twice
}
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else //We have a non-manifold edge
{
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hei.Set(&(*fi), j , fi->V(j));
he=hei;
he.NextF();
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while (he.f!=hei.f) // so we have to iterated all faces that are connected to this edge
{
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if (he.f->IsS()) // if one of the other faces was already visited than this edge was counted already.
{
counted=true;
break;
}
else
{
he.NextF();
}
}
if (counted)
{
count_e--;
counted=false;
}
}
}
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}
fprintf(fpout,"%d\n", count_e);
//vertices
int j;
std::vector<int> FlagV;
VertexPointer vp;
VertexIterator vi;
for(j=0,vi=m.vert.begin();vi!=m.vert.end();++vi)
{
vp=&(*vi);
FlagV.push_back(vp->UberFlags()); // Salva in ogni caso flag del vertice
if( ! vp->IsD() )
{ // ***** ASCII *****
fprintf(fpout,"Vertex: %g %g %g\n" ,vp->P()[0],vp->P()[1],vp->P()[2]);
if( m.HasPerVertexColor() )
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fprintf(fpout,"%d %d %d %d\n",vp->C()[0],vp->C()[1],vp->C()[2],vp->C()[3] );
if( m.HasPerVertexNormal())
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fprintf(fpout,"%g %g %g\n", vp->N()[0],vp->N()[1],vp->N()[2]);
if( m.HasPerVertexTexture())
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fprintf(fpout,"%g %g\n",vp->T().u(),vp->T().v());
}
vp->UberFlags()=j; // Trucco! Nascondi nei flags l'indice del vertice non deletato!
j++;
}
FacePointer fp;
// int vv[3];
int fcnt=0;
for(j=0,fi=m.face.begin();fi!=m.face.end();++fi)
{
fp=&(*fi);
if( ! fp->IsD() )
{ fcnt++;
fprintf(fpout,"3 %d %d %d\n",
fp->cV(0)->UberFlags(), fp->cV(1)->UberFlags(), fp->cV(2)->UberFlags() );
}
}
fclose(fpout);
// Recupera i flag originali
for(j=0,vi=m.vert.begin();vi!=m.vert.end();++vi)
(*vi).UberFlags()=FlagV[j++];
return 0;
}
static const char *ErrorMsg(int error)
{
static std::vector<std::string> off_error_msg;
if(off_error_msg.empty())
{
off_error_msg.resize(2 );
off_error_msg[0]="No errors";
off_error_msg[1]="Can't open file";
}
if(error>1 || error<0) return "Unknown error";
else return off_error_msg[error].c_str();
}
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/*
returns mask of capability one define with what are the saveable information of the format.
*/
static int GetExportMaskCapability()
{
int capability = 0;
capability |= vcg::tri::io::Mask::IOM_VERTCOORD;
capability |= vcg::tri::io::Mask::IOM_VERTCOLOR;
capability |= vcg::tri::io::Mask::IOM_FACEINDEX;
return capability;
}
}; // end class
} // end namespace tri
} // end namespace io
} // end namespace vcg
//@}
#endif