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ExporterT.hh

00001 /*===========================================================================*\
00002  *                                                                           *
00003  *                               OpenMesh                                    *
00004  *      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen      *
00005  *                           www.openmesh.org                                *
00006  *                                                                           *
00007  *---------------------------------------------------------------------------* 
00008  *                                                                           *
00009  *                                License                                    *
00010  *                                                                           *
00011  *  This library is free software; you can redistribute it and/or modify it  *
00012  *  under the terms of the GNU Library General Public License as published   *
00013  *  by the Free Software Foundation, version 2.                              *
00014  *                                                                           *
00015  *  This library is distributed in the hope that it will be useful, but      *
00016  *  WITHOUT ANY WARRANTY; without even the implied warranty of               *
00017  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
00018  *  Library General Public License for more details.                         *
00019  *                                                                           *
00020  *  You should have received a copy of the GNU Library General Public        *
00021  *  License along with this library; if not, write to the Free Software      *
00022  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
00023  *                                                                           *
00024 \*===========================================================================*/
00025 
00026 
00027 //=============================================================================
00028 //
00029 //  Implements an exporter module for arbitrary OpenMesh meshes
00030 //
00031 //=============================================================================
00032 
00033 
00034 #ifndef __EXPORTERT_HH__
00035 #define __EXPORTERT_HH__
00036 
00037 
00038 //=== INCLUDES ================================================================
00039 
00040 // C++
00041 #include <vector>
00042 
00043 // OpenMesh
00044 #include <OpenMesh/Core/System/config.hh>
00045 #include <OpenMesh/Core/Math/VectorT.hh>
00046 #include <OpenMesh/Core/Utils/GenProg.hh>
00047 #include <OpenMesh/Core/Utils/vector_cast.hh>
00048 #include <OpenMesh/Core/Utils/color_cast.hh>
00049 #include <OpenMesh/Core/IO/exporter/BaseExporter.hh>
00050 
00051 
00052 //=== NAMESPACES ==============================================================
00053 
00054 namespace OpenMesh {
00055 namespace IO {
00056 
00057 
00058 //=== EXPORTER CLASS ==========================================================
00059 
00063 template <class Mesh>
00064 class ExporterT : public BaseExporter
00065 {
00066 public:
00067 
00068   // Constructor
00069   ExporterT(const Mesh& _mesh) : mesh_(_mesh) {}
00070    
00071 
00072   // get vertex data
00073 
00074   Vec3f  point(VertexHandle _vh)    const 
00075   { 
00076     return vector_cast<Vec3f>(mesh_.point(_vh)); 
00077   }
00078 
00079   Vec3f  normal(VertexHandle _vh)   const 
00080   { 
00081     return (mesh_.has_vertex_normals() 
00082             ? vector_cast<Vec3f>(mesh_.normal(_vh)) 
00083             : Vec3f(0.0f, 0.0f, 0.0f));
00084   }
00085 
00086   Vec3uc color(VertexHandle _vh)    const
00087   {
00088     return (mesh_.has_vertex_colors() 
00089             ? color_cast<Vec3uc>(mesh_.color(_vh)) 
00090             : Vec3uc(0, 0, 0));
00091   }
00092 
00093   Vec2f  texcoord(VertexHandle _vh) const
00094   {
00095 #if defined(OM_CC_GCC) && (OM_CC_VERSION<30000)
00096     // Workaround! 
00097     // gcc 2.95.3 exits with internal compiler error at the
00098     // code below!??? **)
00099     if (mesh_.has_vertex_texcoords2D())
00100       return vector_cast<Vec2f>(mesh_.texcoord2D(_vh));
00101     return Vec2f(0.0f, 0.0f);
00102 #else // **)
00103     return (mesh_.has_vertex_texcoords2D() 
00104             ? vector_cast<Vec2f>(mesh_.texcoord2D(_vh)) 
00105             : Vec2f(0.0f, 0.0f));
00106 #endif
00107   }
00108 
00109   
00110   // get face data
00111 
00112   unsigned int get_vhandles(FaceHandle _fh, 
00113                             std::vector<VertexHandle>& _vhandles) const
00114   {
00115     unsigned int count(0);
00116     _vhandles.clear();
00117     for (typename Mesh::CFVIter fv_it=mesh_.cfv_iter(_fh); fv_it; ++fv_it)
00118     {
00119       _vhandles.push_back(fv_it.handle());
00120       ++count;
00121     }
00122     return count;
00123   }
00124 
00125   Vec3f  normal(FaceHandle _fh)   const 
00126   { 
00127     return (mesh_.has_face_normals() 
00128             ? vector_cast<Vec3f>(mesh_.normal(_fh)) 
00129             : Vec3f(0.0f, 0.0f, 0.0f));
00130   }
00131 
00132   Vec3uc  color(FaceHandle _fh)   const 
00133   { 
00134     return (mesh_.has_face_colors() 
00135             ? vector_cast<Vec3uc>(mesh_.color(_fh)) 
00136             : Vec3uc(0, 0, 0));
00137   }
00138 
00139   virtual const BaseKernel* kernel() { return &mesh_; }
00140 
00141 
00142   // query number of faces, vertices, normals, texcoords
00143   size_t n_vertices()  const { return mesh_.n_vertices(); }   
00144   size_t n_faces()     const { return mesh_.n_faces(); }
00145   size_t n_edges()     const { return mesh_.n_edges(); }
00146 
00147 
00148   // property information
00149   bool is_triangle_mesh() const
00150   {
00151     typedef typename Mesh::Face Face; // must use typedef for gcc 2.95.x
00152     return Face::is_triangle();
00153   }
00154   bool has_vertex_normals()   const { return mesh_.has_vertex_normals();   }
00155   bool has_vertex_colors()    const { return mesh_.has_vertex_colors();    }
00156   bool has_vertex_texcoords() const { return mesh_.has_vertex_texcoords2D(); }
00157   bool has_face_normals()     const { return mesh_.has_face_normals();     }
00158   bool has_face_colors()      const { return mesh_.has_face_colors();      }
00159 
00160 private:
00161   
00162    const Mesh& mesh_;
00163 };
00164 
00165 
00166 //=============================================================================
00167 } // namespace IO
00168 } // namespace OpenMesh
00169 //=============================================================================
00170 #endif
00171 //=============================================================================

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