MeshFixingT.hh 5.31 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
/*===========================================================================*\
 *                                                                           *
 *                               OpenMesh                                    *
 *      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen      *
 *                           www.openmesh.org                                *
 *                                                                           *
 *---------------------------------------------------------------------------*
 *  This file is part of OpenMesh.                                           *
 *                                                                           *
 *  OpenMesh 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, either version 3 of           *
 *  the License, or (at your option) any later version with the              *
 *  following exceptions:                                                    *
 *                                                                           *
 *  If other files instantiate templates or use macros                       *
 *  or inline functions from this file, or you compile this file and         *
 *  link it with other files to produce an executable, this file does        *
 *  not by itself cause the resulting executable to be covered by the        *
 *  GNU Lesser General Public License. This exception does not however       *
 *  invalidate any other reasons why the executable file might be            *
 *  covered by the GNU Lesser General Public License.                        *
 *                                                                           *
 *  OpenMesh 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 LesserGeneral Public          *
 *  License along with OpenMesh.  If not,                                    *
 *  see <http://www.gnu.org/licenses/>.                                      *
 *                                                                           *
\*===========================================================================*/

/*===========================================================================*\
 *                                                                           *
37 38
 *   $Revision$                                                         *
 *   $Date$                   *
Jan Möbius's avatar
Jan Möbius committed
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
 *                                                                           *
\*===========================================================================*/


#ifndef OPENMESH_MESHFIXING_HH
#define OPENMESH_MESHFIXING_HH

//=============================================================================
//
//  CLASS MeshFixing
//
//=============================================================================

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

//== NAMESPACE ================================================================

//== CLASS DEFINITION =========================================================

/** \brief Compare two vectors
 *
 * If they are closer than a specified epsilon, we identify them as equal.
 *
 */
class CompareVectors
{
public:

  /// Constructor
  CompareVectors(double _eps = FLT_MIN);

  /// comparison operator
  bool operator()( const ACG::Vec3d& _v0, const ACG::Vec3d& _v1 ) const;

private:
  const double epsilon_;
};


/** \brief Fix a mesh
 *
 */
template<class MeshT>
class MeshFixing {

public:

  MeshFixing(MeshT& _mesh, double _epsilon );

  bool fix();


private:

  TriMesh& mesh_;


  /** \brief Add a face to the fixing data
   *
   * Degenerated faces will already be discarded in this step
   *
   * @param _p0 Vertex 1
   * @param _p1 Vertex 2
   * @param _p2 Vertex 3
   */
  void add_face(const ACG::Vec3d& _p0, const ACG::Vec3d& _p1, const ACG::Vec3d& _p2);

  void fix_topology();
  void fix_orientation();

  int neighbor(unsigned int _f, unsigned int _v0, unsigned int _v1);



  /// Internal vertex type
  struct Vertex
  {
    Vertex(const ACG::Vec3d& _p) : p(_p) { };
    ACG::Vec3d                    p;

    /// This vector will contain a list of all faces incident to the current vertex
    std::vector<unsigned int>     faces;
  };

  /// Internal face type
  struct Face
  {
    Face(int _i0, int _i1, int _i2) :
            component(-1)
    {
      v[0] = _i0;
      v[1] = _i1;
      v[2] = _i2;

    }

    unsigned int  v[3];
    int  component;
  };


  typedef std::map<ACG::Vec3d, int, CompareVectors>  VertexMap;

  typedef VertexMap::iterator MapIter;

  std::vector<Vertex>  vertices_;
  std::vector<Face>    faces_;


  /** Add a vertex to the map
   *
   * @param   _p New vertex
   * @return Index of the vertex
   */
  int add_vertex(const ACG::Vec3d& _p);

  VertexMap            vmap_;

};

#if defined(INCLUDE_TEMPLATES) && !defined(OPENMESH_MESHFIXING_CC)
#define OPENMESH_MESHFIXING_TEMPLATES
#include "MeshFixingT.cc"
#endif

#endif