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added code to write faceTexCoords to obj writer.

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fixes #25
This commit is contained in:
Martin Schultz
2016-06-29 16:58:59 +02:00
parent 5ed8f3c053
commit 80192d945b
4 changed files with 150 additions and 8 deletions
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59
src/OpenMesh/Core/IO/writer/OBJWriter.cc
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@@ -257,6 +257,42 @@ write(std::ostream& _out, BaseExporter& _be, Options _opt, std::streamsize _prec
if (useMatrial && _opt.check(Options::FaceColor) )
_out << "mtllib " << objName_ << ".mat" << '\n';
std::map<Vec2f,int> texMap;
//collect Texturevertices from halfedges
if(_opt.check(Options::FaceTexCoord))
{
std::vector<Vec2f> texCoords;
//add all texCoords to map
unsigned int num = _be.get_face_texcoords(texCoords);
for(unsigned int i = 0; i < num ; ++i)
{
texMap[texCoords[i]] = i;
}
}
//collect Texturevertices from vertices
if(_opt.check(Options::VertexTexCoord))
{
for (int i=0, nF=_be.n_faces(); i<nF; ++i)
{
vh = VertexHandle(int(i));
t = _be.texcoord(vh);
texMap[t] = i;
}
}
// assign each texcoord in the map its id
// and write the vt entries
if(_opt.check(Options::VertexTexCoord) || _opt.check(Options::FaceTexCoord))
{
int texCount = 0;
for(std::map<Vec2f,int>::iterator it = texMap.begin(); it != texMap.end() ; ++it)
{
_out << "vt " << it->first[0] << " " << it->first[1] << '\n';
it->second = ++texCount;
}
}
// vertex data (point, normals, texcoords)
for (i=0, nV=_be.n_vertices(); i<nV; ++i)
{
@@ -268,17 +304,15 @@ write(std::ostream& _out, BaseExporter& _be, Options _opt, std::streamsize _prec
_out << "v " << v[0] <<" "<< v[1] <<" "<< v[2] << '\n';
if (_opt.check(Options::VertexNormal))
_out << "vn " << n[0] <<" "<< n[1] <<" "<< n[2] << '\n';
if (_opt.check(Options::VertexTexCoord))
_out << "vt " << t[0] <<" "<< t[1] << '\n';
_out << "vn " << n[0] <<" "<< n[1] <<" "<< n[2] << '\n';
}
size_t lastMat = std::numeric_limits<std::size_t>::max();
// we do not want to write seperators if we only write vertex indices
bool onlyVertices = !_opt.check(Options::VertexTexCoord)
&& !_opt.check(Options::VertexNormal);
&& !_opt.check(Options::VertexNormal)
&& !_opt.check(Options::FaceTexCoord);
// faces (indices starting at 1 not 0)
for (i=0, nF=_be.n_faces(); i<nF; ++i)
@@ -319,9 +353,18 @@ write(std::ostream& _out, BaseExporter& _be, Options _opt, std::streamsize _prec
// write separator
_out << "/" ;
// write vertex texture coordinate index
if (_opt.check(Options::VertexTexCoord))
_out << idx;
//write texCoords index from halfedge
if(_opt.check(Options::FaceTexCoord))
{
_out << texMap[_be.texcoord(_be.getHeh(FaceHandle(int(i)),vhandles[j]))];
}
else
{
// write vertex texture coordinate index
if (_opt.check(Options::VertexTexCoord))
_out << texMap[_be.texcoord(vh)];
}
// write vertex normal index
if ( _opt.check(Options::VertexNormal) ) {