OpenMesh
Loading...
Searching...
No Matches
LongestEdgeT.hh
Go to the documentation of this file.
1/* ========================================================================= *
2 * *
3 * OpenMesh *
4 * Copyright (c) 2001-2015, 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* *
44* $Revision: 410 $ *
45* $Date: 2010-06-17 12:45:58 +0200 (Do, 17. Jun 2010) $ *
46* *
47\*==========================================================================*/
48
53//=============================================================================
54//
55// CLASS LongestEdgeT
56//
57//=============================================================================
58
59
60#ifndef LINEAR_H
61#define LINEAR_H
62
64#include <OpenMesh/Core/Utils/vector_cast.hh>
65#include <OpenMesh/Core/Utils/Property.hh>
66// -------------------- STL
67#include <vector>
68#include <queue>
69#if defined(OM_CC_MIPS)
70# include <math.h>
71#else
72# include <cmath>
73#endif
74
75
76//== NAMESPACE ================================================================
77
78namespace OpenMesh { // BEGIN_NS_OPENMESH
79namespace Subdivider { // BEGIN_NS_DECIMATER
80namespace Uniform { // BEGIN_NS_UNIFORM
81
82
83//== CLASS DEFINITION =========================================================
84
85template <typename MeshType, typename RealType = float>
87 public:
88
89 typedef std::pair<typename MeshType::EdgeHandle, RealType> queueElement;
90
91 bool operator()(const queueElement& t1, const queueElement& t2) // Returns true if t1 is smaller than t2
92 {
93 return (t1.second < t2.second);
94 }
95};
96
97
104template <typename MeshType, typename RealType = float>
105class LongestEdgeT : public SubdividerT<MeshType, RealType>
106{
107public:
108
109 typedef RealType real_t;
110 typedef MeshType mesh_t;
112
113 typedef std::vector< std::vector<real_t> > weights_t;
114 typedef std::vector<real_t> weight_t;
115
116 typedef std::pair< typename mesh_t::EdgeHandle, real_t > queueElement;
117
118public:
119
120
122 { }
123
124
125 LongestEdgeT( mesh_t& _m) : parent_t(_m)
126 { }
127
128
129 ~LongestEdgeT() {}
130
131
132public:
133
134
135 const char *name() const { return "Longest Edge Split"; }
136
137 void set_max_edge_length(double _value) {
138 max_edge_length_squared_ = _value * _value;
139 }
140
141protected:
142
143
144 bool prepare( mesh_t& _m )
145 {
146 return true;
147 }
148
149
150 bool cleanup( mesh_t& _m )
151 {
152 return true;
153 }
154
155
156 bool subdivide( MeshType& _m, size_t _n , const bool _update_points = true)
157 {
158
159 // Sorted queue containing all edges sorted by their decreasing length
160 std::priority_queue< queueElement, std::vector< queueElement > , CompareLengthFunction< mesh_t, real_t > > queue;
161
162 // Build the initial queue
163 // First element should be longest edge
164 typename mesh_t::EdgeIter edgesEnd = _m.edges_end();
165 for ( typename mesh_t::EdgeIter eit = _m.edges_begin(); eit != edgesEnd; ++eit) {
166 const typename MeshType::Point to = _m.point(_m.to_vertex_handle(_m.halfedge_handle(*eit,0)));
167 const typename MeshType::Point from = _m.point(_m.from_vertex_handle(_m.halfedge_handle(*eit,0)));
168
169 real_t length = (to - from).sqrnorm();
170
171 // Only push the edges that need to be split
172 if ( length > max_edge_length_squared_ )
173 queue.push( queueElement(*eit,length) );
174 }
175
176 bool stop = false;
177 while ( !stop && ! queue.empty() ) {
178 queueElement a = queue.top();
179 queue.pop();
180
181 if ( a.second < max_edge_length_squared_ ) {
182 stop = true;
183 break;
184 } else {
185 const typename MeshType::Point to = _m.point(_m.to_vertex_handle(_m.halfedge_handle(a.first,0)));
186 const typename MeshType::Point from = _m.point(_m.from_vertex_handle(_m.halfedge_handle(a.first,0)));
187 const typename MeshType::Point midpoint = static_cast<typename MeshType::Point::value_type>(0.5) * (to + from);
188
189 const typename MeshType::VertexHandle newVertex = _m.add_vertex(midpoint);
190 _m.split(a.first,newVertex);
191
192 for ( typename MeshType::VertexOHalfedgeIter voh_it(_m,newVertex); voh_it.is_valid(); ++voh_it) {
193 typename MeshType::EdgeHandle eh = _m.edge_handle(*voh_it);
194 const typename MeshType::Point to = _m.point(_m.to_vertex_handle(*voh_it));
195 const typename MeshType::Point from = _m.point(_m.from_vertex_handle(*voh_it));
196 real_t length = (to - from).sqrnorm();
197
198 // Only push the edges that need to be split
199 if ( length > max_edge_length_squared_ )
200 queue.push( queueElement(eh,length) );
201
202 }
203 }
204 }
205
206#if defined(_DEBUG) || defined(DEBUG)
207 // Now we have an consistent mesh!
208 assert( OpenMesh::Utils::MeshCheckerT<mesh_t>(_m).check() );
209#endif
210
211
212 return true;
213 }
214
215
216private: // data
217 real_t max_edge_length_squared_;
218
219};
220
221} // END_NS_UNIFORM
222} // END_NS_SUBDIVIDER
223} // END_NS_OPENMESH
224#endif
225
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:64
Kernel::EdgeIter EdgeIter
Scalar type.
Definition: PolyMeshT.hh:148
Uniform LongestEdgeT subdivision algorithm
Definition: LongestEdgeT.hh:106
bool prepare(mesh_t &_m)
Prepare mesh, e.g. add properties.
Definition: LongestEdgeT.hh:144
bool cleanup(mesh_t &_m)
Cleanup mesh after usage, e.g. remove added properties.
Definition: LongestEdgeT.hh:150
const char * name() const
Return name of subdivision algorithm.
Definition: LongestEdgeT.hh:135
bool subdivide(MeshType &_m, size_t _n, const bool _update_points=true)
Subdivide mesh _m _n times.
Definition: LongestEdgeT.hh:156
Abstract base class for uniform subdivision algorithms.
Definition: SubdividerT.hh:95
Check integrity of mesh.
Definition: MeshCheckerT.hh:79

Project OpenMesh, ©  Computer Graphics Group, RWTH Aachen. Documentation generated using doxygen .