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#ifndef POLY_TRIANGULATOR_H
#define POLY_TRIANGULATOR_H
#include "util_dae.h"
#include <wrap/gl/glu_tesselator.h>
namespace vcg {
namespace tri {
namespace io {
// These two classes is used for temporary storing of the
// collected data of the polgons during the reading of files.
template<typename VERTEX_TYPE>
class MyPolygon
{
public:
typedef VERTEX_TYPE BaseVertexType;
int _nvert;
std::vector<VERTEX_TYPE*> _pv;
std::vector< vcg::TexCoord2<float> > _txc;
MyPolygon(int n)
:_nvert(n),_pv(_nvert),_txc(_nvert)
{
}
};
template<typename POLYGONAL_TYPE>
class PolygonalMesh
{
public:
typedef POLYGONAL_TYPE FaceType;
enum PERWEDGEATTRIBUTETYPE {NONE = 0,NORMAL = 1,MULTITEXTURECOORD = 2,MULTICOLOR = 4};
typedef typename FaceType::BaseVertexType VertexType;
typedef VertexType* VertexPointer;
typedef typename std::vector<VertexType>::iterator VertexIterator;
typedef typename std::vector<FaceType>::iterator PolygonIterator;
vcg::Box3<float> bbox;
std::vector<VertexType> vert;
std::vector<FaceType> _pols;
void generatePointsVector(std::vector<std::vector<vcg::Point3f> >& v)
{
for(typename PolygonalMesh::PolygonIterator itp = _pols.begin();itp != _pols.end();++itp)
{
v.push_back(std::vector<vcg::Point3f>());
for(typename std::vector<VertexPointer>::iterator itv = itp->_pv.begin();itv != itp->_pv.end();++itv)
{
v[v.size() - 1].push_back((*itv)->P());
}
}
}
void usePerWedgeAttributes(PERWEDGEATTRIBUTETYPE att,const unsigned int multitexture = 1,const unsigned int multicolor = 1)
{
if (att != NONE)
{
for(PolygonIterator itp = _pols.begin();itp != _pols.end();++itp)
{
if (att & MULTICOLOR) itp->usePerWedgeColor(multicolor);
if (att & MULTITEXTURECOORD) itp->usePerWedgeMultiTexture(multitexture);
if (att & NORMAL) itp->usePerWedgeNormal();
}
}
}
template<class TRIMESH>
void triangulate(TRIMESH& mesh)
{
std::vector<std::vector<vcg::Point3f> > pl;
mesh.vert.resize(vert.size());
int multicoor = 0;
//PolygonalMesh's points has been copied in TriangularMesh
for(size_t jj = 0;jj < mesh.vert.size();++jj)
mesh.vert[jj].P() = vert[jj].P();
bool texen = mesh.face.IsWedgeTexEnabled();
unsigned int totaltri = 0;
for(size_t ii = 0;ii < _pols.size();++ii)
totaltri += _pols[ii]._nvert - 2;
mesh.face.resize(totaltri);
//transform the polygonal mesh in a vector<vector<Point>>
generatePointsVector(pl);
int trioff = 0;
//foreach Polygon
for(size_t ii = 0;ii < pl.size();++ii)
{
std::vector<int> tx;
std::vector<std::vector<vcg::Point3f> > pl2(1);
pl2[0] = pl[ii];
vcg::glu_tesselator::tesselate(pl2,tx);
size_t ntri = tx.size() / 3;
assert(tx.size() % 3 == 0);
int polvert = 0;
//foreach triangle
for(size_t tr = 0;tr < ntri;++tr)
{
//typename TRIMESH::FaceType& f = mesh.face[tr];
//typename TRIMESH::FaceType& f = mesh.face[tr];
for(unsigned int tt = 0;tt < 3; ++tt)
{
mesh.face[trioff + tr].V(tt) = &(mesh.vert[_pols[ii]._pv[tx[3 * tr + tt]] - &(vert[0])]);
//vcg::Point3f ppp = mesh.face[tr].V(tt)->P();
if (texen)
{
/* f.WT(multicoor).U() = _pols[ii]._txc[polvert].U();
f.WT(multicoor).V() = _pols[ii]._txc[polvert].V();
f.WT(multicoor).N() = _pols[ii]._txc[polvert].N();*/
}
polvert = (polvert + 1) % _pols[ii]._nvert;
}
//mesh.face.push_back(f);
}
trioff += ntri;
}
assert(trioff == totaltri);
}
};
}
}
}
#endif
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