97f515985d
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
304 lines
8.5 KiB
C++
304 lines
8.5 KiB
C++
/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* *
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* License *
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* *
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* This library is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as published *
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* by the Free Software Foundation, version 2.1. *
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* *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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\*===========================================================================*/
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//== INCLUDES =================================================================
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//STL
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#include <fstream>
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// OpenMesh
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#include <OpenMesh/Core/System/config.h>
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#include <OpenMesh/Core/IO/BinaryHelper.hh>
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#include <OpenMesh/Core/IO/writer/OBJWriter.hh>
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#include <OpenMesh/Core/IO/IOManager.hh>
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#include <OpenMesh/Core/System/omstream.hh>
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#include <OpenMesh/Core/Utils/color_cast.hh>
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//=== NAMESPACES ==============================================================
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namespace OpenMesh {
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namespace IO {
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//=== INSTANCIATE =============================================================
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// register the OBJLoader singleton with MeshLoader
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_OBJWriter_ __OBJWriterinstance;
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_OBJWriter_& OBJWriter() { return __OBJWriterinstance; }
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//=== IMPLEMENTATION ==========================================================
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_OBJWriter_::_OBJWriter_() { IOManager().register_module(this); }
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//-----------------------------------------------------------------------------
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bool
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_OBJWriter_::
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write(const std::string& _filename, BaseExporter& _be, Options _opt) const
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{
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std::fstream out(_filename.c_str(), std::ios_base::out );
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if (!out)
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{
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omerr() << "[OBJWriter] : cannot open file "
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<< _filename << std::endl;
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return false;
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}
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{
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#if defined(WIN32)
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std::string::size_type dot = _filename.find_last_of("\\/");
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#else
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std::string::size_type dot = _filename.rfind("/");
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#endif
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if (dot == std::string::npos){
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path_ = "./";
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objName_ = _filename;
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}else{
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path_ = _filename.substr(0,dot+1);
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objName_ = _filename.substr(dot+1);
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}
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//remove the file extension
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dot = _filename.find_last_of(".");
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if(dot != std::string::npos)
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objName_ = objName_.substr(0,dot-1);
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}
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bool result = write(out, _be, _opt);
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out.close();
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return result;
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}
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//-----------------------------------------------------------------------------
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int _OBJWriter_::getMaterial(OpenMesh::Vec3f _color) const
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{
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for (uint i=0; i < material_.size(); i++)
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if(material_[i] == _color)
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return i;
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//not found add new material
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material_.push_back( _color );
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return material_.size()-1;
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}
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//-----------------------------------------------------------------------------
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int _OBJWriter_::getMaterial(OpenMesh::Vec4f _color) const
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{
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for (uint i=0; i < materialA_.size(); i++)
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if(materialA_[i] == _color)
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return i;
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//not found add new material
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materialA_.push_back( _color );
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return materialA_.size()-1;
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}
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//-----------------------------------------------------------------------------
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bool
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_OBJWriter_::
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writeMaterial(std::fstream& _out, BaseExporter& _be, Options _opt) const
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{
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OpenMesh::Vec3f c;
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OpenMesh::Vec4f cA;
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material_.clear();
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materialA_.clear();
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//iterate over faces
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for (int i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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//color with alpha
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if ( _opt.color_has_alpha() ){
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cA = color_cast<OpenMesh::Vec4f> (_be.colorA( FaceHandle(i) ));
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getMaterial(cA);
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}else{
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//and without alpha
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c = color_cast<OpenMesh::Vec3f> (_be.color( FaceHandle(i) ));
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getMaterial(c);
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}
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}
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//write the materials
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if ( _opt.color_has_alpha() )
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for (uint i=0; i < materialA_.size(); i++){
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_out << "newmtl " << "mat" << i << std::endl;
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_out << "Ka 0.5000 0.5000 0.5000" << std::endl;
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_out << "Kd " << materialA_[i][0] << materialA_[i][1] << materialA_[i][2] << std::endl;;
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_out << "Tr " << materialA_[i][3] << std::endl;
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_out << "illum 1" << std::endl;
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}
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else
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for (uint i=0; i < material_.size(); i++){
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_out << "newmtl " << "mat" << i << std::endl;
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_out << "Ka 0.5000 0.5000 0.5000" << std::endl;
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_out << "Kd " << material_[i][0] << material_[i][1] << material_[i][2] << std::endl;;
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_out << "illum 1" << std::endl;
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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bool
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_OBJWriter_::
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write(std::fstream& _out, BaseExporter& _be, Options _opt) const
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{
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unsigned int i, j, nV, nF, idx;
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Vec3f v, n;
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Vec2f t;
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VertexHandle vh;
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std::vector<VertexHandle> vhandles;
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bool useMatrial = false;
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OpenMesh::Vec3f c;
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OpenMesh::Vec4f cA;
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omlog() << "[OBJWriter] : write file\n";
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// check exporter features
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if (!check( _be, _opt))
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return false;
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// check writer features
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if ( _opt.check(Options::Binary) || // not supported by format
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_opt.check(Options::FaceNormal) ||
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_opt.check(Options::FaceColor))
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return false;
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//create material file if needed
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if ( _opt.check(Options::FaceColor) ){
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std::string matFile = path_ + objName_ + ".mat";
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std::fstream matStream(matFile.c_str(), std::ios_base::out );
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if (!_out)
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{
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omerr() << "[OBJWriter] : cannot write material file " << matFile << std::endl;
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}else{
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useMatrial = writeMaterial(matStream, _be, _opt);
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matStream.close();
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}
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}
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// header
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_out << "# " << _be.n_vertices() << " vertices, ";
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_out << _be.n_faces() << " faces" << std::endl;
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// material file
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if (useMatrial && _opt.check(Options::FaceColor) )
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_out << "mtllib " << objName_ << ".mat" << std::endl;
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// vertex data (point, normals, texcoords)
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for (i=0, nV=_be.n_vertices(); i<nV; ++i)
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{
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vh = VertexHandle(i);
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v = _be.point(vh);
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n = _be.normal(vh);
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t = _be.texcoord(vh);
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_out << "v " << v[0] <<" "<< v[1] <<" "<< v[2] << std::endl;
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if (_opt.check(Options::VertexNormal))
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_out << "n " << n[0] <<" "<< n[1] <<" "<< n[2] << std::endl;
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if (_opt.check(Options::VertexTexCoord))
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_out << "vt " << t[0] <<" "<< t[1] << std::endl;
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}
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int lastMat = -1;
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// faces (indices starting at 1 not 0)
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for (i=0, nF=_be.n_faces(); i<nF; ++i)
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{
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if (useMatrial && _opt.check(Options::FaceColor) ){
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int i;
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//color with alpha
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if ( _opt.color_has_alpha() ){
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cA = color_cast<OpenMesh::Vec4f> (_be.colorA( FaceHandle(i) ));
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i = getMaterial(cA);
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}else{
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//and without alpha
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c = color_cast<OpenMesh::Vec3f> (_be.color( FaceHandle(i) ));
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i = getMaterial(c);
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}
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if(lastMat != i)
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_out << "usemtl mat" << i << std::endl;
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}
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_out << "f";
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_be.get_vhandles(FaceHandle(i), vhandles);
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for (j=0; j< vhandles.size(); ++j)
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{
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idx = vhandles[j].idx() + 1;
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_out << " " << idx;
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if (_opt.check(Options::VertexTexCoord))
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_out << "/" << idx;
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if ( _opt.check(Options::VertexNormal) )
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_out << "/" << idx;
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}
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_out << std::endl;
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}
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material_.clear();
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materialA_.clear();
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return true;
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}
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//=============================================================================
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} // namespace IO
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} // namespace OpenMesh
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//=============================================================================
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