ImporterT.hh 7.44 KB
Newer Older
Jan Möbius's avatar
Jan Möbius committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123
/*===========================================================================*\
 *                                                                           *
 *                               OpenMesh                                    *
 *        Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen         *
 *                           www.openmesh.org                                *
 *                                                                           *
 *---------------------------------------------------------------------------*
 *                                                                           *
 *                                License                                    *
 *                                                                           *
 *  This library is free software; you can redistribute it and/or modify it  *
 *  under the terms of the GNU Lesser General Public License as published    *
 *  by the Free Software Foundation, version 2.1.                            *
 *                                                                           *
 *  This library 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        *
 *  Lesser General Public License for more details.                          *
 *                                                                           *
 *  You should have received a copy of the GNU Lesser General Public         *
 *  License along with this library; if not, write to the Free Software      *
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
 *                                                                           *
\*===========================================================================*/


//=============================================================================
//
//  Implements an importer module for arbitrary OpenMesh meshes
//
//=============================================================================


#ifndef __IMPORTERT_HH__
#define __IMPORTERT_HH__


//=== INCLUDES ================================================================


#include <OpenMesh/Core/IO/importer/BaseImporter.hh>
#include <OpenMesh/Core/Utils/vector_cast.hh>
#include <OpenMesh/Core/Utils/color_cast.hh>
#include <OpenMesh/Core/Mesh/Attributes.hh>
#include <OpenMesh/Core/System/omstream.hh>


//== NAMESPACES ===============================================================


namespace OpenMesh {
namespace IO {


//=== IMPLEMENTATION ==========================================================


/**
 *  This class template provides an importer module for OpenMesh meshes.
 */
template <class Mesh>
class ImporterT : public BaseImporter
{
public:

  typedef typename Mesh::Point       Point;
  typedef typename Mesh::Normal      Normal;
  typedef typename Mesh::Color       Color;
  typedef typename Mesh::TexCoord2D  TexCoord2D;
  typedef std::vector<VertexHandle>  VHandles;


  ImporterT(Mesh& _mesh) : mesh_(_mesh) {}


  virtual VertexHandle add_vertex(const Vec3f& _point)
  {
    return mesh_.add_vertex(vector_cast<Point>(_point));
  }


  virtual FaceHandle add_face(const VHandles& _indices)
  {
    FaceHandle fh;

    if (_indices.size() > 2)
    {
      VHandles::const_iterator it, it2, end(_indices.end());


      // test for valid vertex indices
      for (it=_indices.begin(); it!=end; ++it)
	if (! mesh_.is_valid_handle(*it))
	{
	  omerr() << "ImporterT: Face contains invalid vertex index\n";
	  return fh;
	}


      // don't allow double vertices
      for (it=_indices.begin(); it!=end; ++it)
	for (it2=it+1; it2!=end; ++it2)
	  if (*it == *it2)
	  {
	    omerr() << "ImporterT: Face has equal vertices\n";
	    failed_faces_.push_back(_indices);
	    return fh;
	  }


      // try to add face
      fh = mesh_.add_face(_indices);
      if (!fh.is_valid())
      {
	failed_faces_.push_back(_indices);
	return fh;
      }
    }

    return fh;
  }


124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
  virtual void add_face_texcoords( FaceHandle _fh, VertexHandle _vh, const std::vector<Vec2f>& _face_texcoords)
  {
    // get first halfedge handle
    HalfedgeHandle cur_heh   = mesh_.halfedge_handle(_fh);
    HalfedgeHandle end_heh   = mesh_.prev_halfedge_handle(cur_heh);
    
    // find start heh
    while( mesh_.to_vertex_handle(cur_heh) != _vh && cur_heh != end_heh ) 
      cur_heh = mesh_.next_halfedge_handle( cur_heh);

    for(unsigned int i=0; i<_face_texcoords.size(); ++i)
    {
      set_texcoord( cur_heh, _face_texcoords[i]);
      cur_heh = mesh_.next_halfedge_handle( cur_heh);
    }
  }


Jan Möbius's avatar
Jan Möbius committed
142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
  // vertex attributes

  virtual void set_normal(VertexHandle _vh, const Vec3f& _normal)
  {
    if (mesh_.has_vertex_normals())
      mesh_.set_normal(_vh, vector_cast<Normal>(_normal));
  }

  virtual void set_color(VertexHandle _vh, const Vec4uc& _color)
  {
    if (mesh_.has_vertex_colors())
      mesh_.set_color(_vh, color_cast<Color>(_color));
  }

  virtual void set_color(VertexHandle _vh, const Vec3uc& _color)
  {
    if (mesh_.has_vertex_colors())
      mesh_.set_color(_vh, color_cast<Color>(_color));
  }


  virtual void set_texcoord(VertexHandle _vh, const Vec2f& _texcoord)
  {
    if (mesh_.has_vertex_texcoords2D())
    mesh_.set_texcoord2D(_vh, vector_cast<TexCoord2D>(_texcoord));
167 168 169 170 171 172
  }

  virtual void set_texcoord(HalfedgeHandle _heh, const Vec2f& _texcoord)
  {
    if (mesh_.has_halfedge_texcoords2D())
      mesh_.set_texcoord2D(_heh, vector_cast<TexCoord2D>(_texcoord));
Jan Möbius's avatar
Jan Möbius committed
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259
  }


  // face attributes

  virtual void set_normal(FaceHandle _fh, const Vec3f& _normal)
  {
    if (mesh_.has_face_normals())
      mesh_.set_normal(_fh, vector_cast<Normal>(_normal));
  }

  virtual void set_color(FaceHandle _fh, const Vec3uc& _color)
  {
    if (mesh_.has_face_colors())
      mesh_.set_color(_fh, color_cast<Color>(_color));
  }

  virtual void set_color(FaceHandle _fh, const Vec4uc& _color)
  {
    if (mesh_.has_face_colors())
      mesh_.set_color(_fh, color_cast<Color>(_color));
  }

  // low-level access to mesh

  virtual BaseKernel* kernel() { return &mesh_; }

  bool is_triangle_mesh() const
  { return Mesh::is_triangles(); }

  void reserve(unsigned int nV, unsigned int nE, unsigned int nF)
  {
    mesh_.reserve(nV, nE, nF);
  }

  // query number of faces, vertices, normals, texcoords
  size_t n_vertices()  const { return mesh_.n_vertices(); }
  size_t n_faces()     const { return mesh_.n_faces(); }
  size_t n_edges()     const { return mesh_.n_edges(); }


  void prepare() { failed_faces_.clear(); }


  void finish()
  {
    if (!failed_faces_.empty())
    {
      omerr() << failed_faces_.size()
	    << " faces failed, adding them as isolated faces\n";

      for (unsigned int i=0; i<failed_faces_.size(); ++i)
      {
	VHandles&  vhandles = failed_faces_[i];

	// double vertices
	for (unsigned int j=0; j<vhandles.size(); ++j)
	{
	  Point p = mesh_.point(vhandles[j]);
	  vhandles[j] = mesh_.add_vertex(p);
	  // DO STORE p, reference may not work since vertex array
	  // may be relocated after adding a new vertex !
	}

	// add face
	mesh_.add_face(vhandles);
      }

      failed_faces_.clear();
    }
  }



private:

  Mesh& mesh_;
  std::vector<VHandles>  failed_faces_;
};


//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================