OpenMesh
DecimaterT.hh
Go to the documentation of this file.
1 /* ========================================================================= *
2  * *
3  * OpenMesh *
4  * Copyright (c) 2001-2022, RWTH-Aachen University *
5  * Department of Computer Graphics and Multimedia *
6  * All rights reserved. *
7  * www.openmesh.org *
8  * *
9  *---------------------------------------------------------------------------*
10  * This file is part of OpenMesh. *
11  *---------------------------------------------------------------------------*
12  * *
13  * Redistribution and use in source and binary forms, with or without *
14  * modification, are permitted provided that the following conditions *
15  * are met: *
16  * *
17  * 1. Redistributions of source code must retain the above copyright notice, *
18  * this list of conditions and the following disclaimer. *
19  * *
20  * 2. Redistributions in binary form must reproduce the above copyright *
21  * notice, this list of conditions and the following disclaimer in the *
22  * documentation and/or other materials provided with the distribution. *
23  * *
24  * 3. Neither the name of the copyright holder nor the names of its *
25  * contributors may be used to endorse or promote products derived from *
26  * this software without specific prior written permission. *
27  * *
28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
31  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
32  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
33  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
34  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
35  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
36  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
37  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
38  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
39  * *
40  * ========================================================================= */
41 
42 
43 
47 //=============================================================================
48 //
49 // CLASS DecimaterT
50 //
51 //=============================================================================
52 
53 #ifndef OPENMESH_DECIMATER_DECIMATERT_HH
54 #define OPENMESH_DECIMATER_DECIMATERT_HH
55 
56 
57 //== INCLUDES =================================================================
58 
59 #include <memory>
60 
61 #include <OpenMesh/Core/Utils/Property.hh>
64 
65 //== NAMESPACE ================================================================
66 
67 namespace OpenMesh {
68 namespace Decimater {
69 
70 
71 //== CLASS DEFINITION =========================================================
72 
73 
77 template < typename MeshT >
78 class DecimaterT : virtual public BaseDecimaterT<MeshT> //virtual especially for the mixed decimater
79 {
80 public: //-------------------------------------------------------- public types
81 
82  typedef DecimaterT< MeshT > Self;
83  typedef MeshT Mesh;
85  typedef ModBaseT<MeshT> Module;
86  typedef std::vector< Module* > ModuleList;
87  typedef typename ModuleList::iterator ModuleListIterator;
88 
89 public: //------------------------------------------------------ public methods
90 
92  explicit DecimaterT( Mesh& _mesh );
93 
95  ~DecimaterT();
96 
97 public:
98 
109  size_t decimate( size_t _n_collapses = 0 , bool _only_selected = false);
110 
121  size_t decimate_to( size_t _n_vertices , bool _only_selected = false)
122  {
123  return ( (_n_vertices < this->mesh().n_vertices()) ?
124  decimate( this->mesh().n_vertices() - _n_vertices , _only_selected ) : 0 );
125  }
126 
140  size_t decimate_to_faces( size_t _n_vertices=0, size_t _n_faces=0 , bool _only_selected = false);
141 
142 public:
143 
144  typedef typename Mesh::VertexHandle VertexHandle;
145  typedef typename Mesh::HalfedgeHandle HalfedgeHandle;
146 
149  {
150  public:
151 
152  HeapInterface(Mesh& _mesh,
153  VPropHandleT<float> _prio,
154  VPropHandleT<int> _pos)
155  : mesh_(_mesh), prio_(_prio), pos_(_pos)
156  { }
157 
158  inline bool
159  less( VertexHandle _vh0, VertexHandle _vh1 )
160  { return mesh_.property(prio_, _vh0) < mesh_.property(prio_, _vh1); }
161 
162  inline bool
163  greater( VertexHandle _vh0, VertexHandle _vh1 )
164  { return mesh_.property(prio_, _vh0) > mesh_.property(prio_, _vh1); }
165 
166  inline int
167  get_heap_position(VertexHandle _vh)
168  { return mesh_.property(pos_, _vh); }
169 
170  inline void
171  set_heap_position(VertexHandle _vh, int _pos)
172  { mesh_.property(pos_, _vh) = _pos; }
173 
174 
175  private:
176  Mesh& mesh_;
177  VPropHandleT<float> prio_;
178  VPropHandleT<int> pos_;
179  };
180 
182 
183 
184 private: //---------------------------------------------------- private methods
185 
187  void heap_vertex(VertexHandle _vh);
188 
189 private: //------------------------------------------------------- private data
190 
191 
192  // reference to mesh
193  Mesh& mesh_;
194 
195  // heap
196  #if (defined(_MSC_VER) && (_MSC_VER >= 1800)) || __cplusplus > 199711L || defined( __GXX_EXPERIMENTAL_CXX0X__ )
197  std::unique_ptr<DeciHeap> heap_;
198  #else
199  std::auto_ptr<DeciHeap> heap_;
200  #endif
201 
202  // vertex properties
203  VPropHandleT<HalfedgeHandle> collapse_target_;
204  VPropHandleT<float> priority_;
205  VPropHandleT<int> heap_position_;
206 
207 };
208 
209 //=============================================================================
210 } // END_NS_DECIMATER
211 } // END_NS_OPENMESH
212 //=============================================================================
213 #if defined(OM_INCLUDE_TEMPLATES) && !defined(OPENMESH_DECIMATER_DECIMATERT_CC)
214 #define OPENMESH_DECIMATER_TEMPLATES
215 #include "DecimaterT_impl.hh"
216 #endif
217 //=============================================================================
218 #endif // OPENMESH_DECIMATER_DECIMATERT_HH defined
219 //=============================================================================
220 
A generic heap class.
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:59
Handle for a vertex entity.
Definition: Handles.hh:121
Handle for a halfedge entity.
Definition: Handles.hh:128
Kernel::VertexHandle VertexHandle
Handle for referencing the corresponding item.
Definition: PolyMeshT.hh:136
Kernel::HalfedgeHandle HalfedgeHandle
Scalar type.
Definition: PolyMeshT.hh:137
Definition: BaseDecimaterT.hh:86
Mesh & mesh()
access mesh. used in modules.
Definition: BaseDecimaterT.hh:138
Stores information about a halfedge collapse.
Definition: CollapseInfoT.hh:74
Decimater framework.
Definition: DecimaterT.hh:79
size_t decimate(size_t _n_collapses=0, bool _only_selected=false)
Perform a number of collapses on the mesh.
Definition: DecimaterT_impl.hh:150
size_t decimate_to_faces(size_t _n_vertices=0, size_t _n_faces=0, bool _only_selected=false)
Attempts to decimate the mesh until a desired vertex or face complexity is achieved.
Definition: DecimaterT_impl.hh:259
~DecimaterT()
Destructor.
Definition: DecimaterT_impl.hh:92
size_t decimate_to(size_t _n_vertices, bool _only_selected=false)
Decimate the mesh to a desired target vertex complexity.
Definition: DecimaterT.hh:121
DecimaterT(Mesh &_mesh)
Constructor.
Definition: DecimaterT_impl.hh:72
Heap interface.
Definition: DecimaterT.hh:149
Base class for all decimation modules.
Definition: ModBaseT.hh:193
An efficient, highly customizable heap.
Definition: HeapT.hh:139

Project OpenMesh, ©  Visual Computing Institute, RWTH Aachen. Documentation generated using doxygen .