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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2011 \/)\/ *
* 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. *
* *
****************************************************************************/
#ifndef EXPORT_CTM_H
#define EXPORT_CTM_H
namespace vcg {
namespace tri {
namespace io {
template <class SaveMeshType>
class ExporterCTM
{
public:
typedef typename SaveMeshType::VertexPointer VertexPointer;
typedef typename SaveMeshType::FaceIterator FaceIterator;
static int Save(SaveMeshType &m, const char * filename, int mask=0, bool lossLessFlag=false, float relativePrecision=0.0001)
{
tri::Allocator<SaveMeshType>::CompactVertexVector(m);
tri::Allocator<SaveMeshType>::CompactFaceVector(m);
CTMuint aVertCount=m.vn;
CTMuint aTriCount=m.fn;
std::vector<CTMfloat> aVertices(aVertCount*3);
std::vector<CTMfloat> aColors(aVertCount*4);
std::vector<CTMfloat> aQuality(aVertCount*4);
std::vector<CTMuint> aIndices(aTriCount*3);
int err;
CTMcontext context;
// Create a new exporter context
context = ctmNewContext(CTM_EXPORT);
if(lossLessFlag) ctmCompressionMethod(context, CTM_METHOD_MG1);
else {
ctmCompressionMethod(context, CTM_METHOD_MG2);
ctmVertexPrecision(context, relativePrecision);
}
// Prepare vertex and faces
for(unsigned int i=0;i<aVertCount;++i)
{
aVertices[i*3+0]=m.vert[i].P()[0];
aVertices[i*3+1]=m.vert[i].P()[1];
aVertices[i*3+2]=m.vert[i].P()[2];
}
for(unsigned int i=0;i<aTriCount;++i)
{
aIndices[i*3+0]=m.face[i].V(0)-&*m.vert.begin();
aIndices[i*3+1]=m.face[i].V(1)-&*m.vert.begin();
aIndices[i*3+2]=m.face[i].V(2)-&*m.vert.begin();
}
if(aTriCount==0)
{
aIndices.resize(3,0);
aTriCount=1;
}
// Define our mesh representation to OpenCTM
ctmDefineMesh(context, &*aVertices.begin(), aVertCount, &*aIndices.begin(), aTriCount, NULL);
err=ctmGetError(context);
if(err) return err;
if( tri::HasPerVertexColor(m) && (mask & io::Mask::IOM_VERTCOLOR))
{
aColors.resize(aVertCount*4);
for(unsigned int i=0;i<aVertCount;++i)
{
aColors[i*4+0]=(float)(m.vert[i].C()[0])/255.0f;
aColors[i*4+1]=(float)(m.vert[i].C()[1])/255.0f;
aColors[i*4+2]=(float)(m.vert[i].C()[2])/255.0f;
aColors[i*4+3]=(float)(m.vert[i].C()[3])/255.0f;
}
ctmAddAttribMap(context,&aColors[0], "Color");
}
if( tri::HasPerVertexQuality(m) && (mask & io::Mask::IOM_VERTQUALITY))
{
aQuality.resize(aVertCount*4,0);
for(unsigned int i=0;i<aVertCount;++i)
{
aQuality[i*4+0]=m.vert[i].Q();
}
ctmAddAttribMap(context,&aQuality[0], "Quality");
}
// Save the OpenCTM file
ctmSave(context, filename);
err=ctmGetError(context);
if(err) return err;
// Free the context
ctmFreeContext(context);
return err;
}
/*
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_VERTCOORD;
capability |= vcg::tri::io::Mask::IOM_VERTQUALITY;
capability |= vcg::tri::io::Mask::IOM_VERTCOLOR;
return capability;
}
static const char *ErrorMsg(int error)
{
if(error==0) return "Ok, no errors";
else return ctmErrorString((CTMenum)error);
}
};
} // end namespace io
} // end namespace tri
} // end namespace vcg
#endif // EXPORT_CTM_H
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