OpenMesh
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00001 /*===========================================================================*\ 00002 * * 00003 * OpenMesh * 00004 * Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen * 00005 * www.openmesh.org * 00006 * * 00007 *---------------------------------------------------------------------------* 00008 * This file is part of OpenMesh. * 00009 * * 00010 * OpenMesh is free software: you can redistribute it and/or modify * 00011 * it under the terms of the GNU Lesser General Public License as * 00012 * published by the Free Software Foundation, either version 3 of * 00013 * the License, or (at your option) any later version with the * 00014 * following exceptions: * 00015 * * 00016 * If other files instantiate templates or use macros * 00017 * or inline functions from this file, or you compile this file and * 00018 * link it with other files to produce an executable, this file does * 00019 * not by itself cause the resulting executable to be covered by the * 00020 * GNU Lesser General Public License. This exception does not however * 00021 * invalidate any other reasons why the executable file might be * 00022 * covered by the GNU Lesser General Public License. * 00023 * * 00024 * OpenMesh is distributed in the hope that it will be useful, * 00025 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00026 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00027 * GNU Lesser General Public License for more details. * 00028 * * 00029 * You should have received a copy of the GNU LesserGeneral Public * 00030 * License along with OpenMesh. If not, * 00031 * see <http://www.gnu.org/licenses/>. * 00032 * * 00033 \*===========================================================================*/ 00034 00035 /*===========================================================================*\ 00036 * * 00037 * $Revision: 362 $ * 00038 * $Date: 2011-01-26 10:21:12 +0100 (Mi, 26 Jan 2011) $ * 00039 * * 00040 \*===========================================================================*/ 00041 00046 //============================================================================= 00047 // 00048 // CLASS ModNormalFlipping 00049 // 00050 //============================================================================= 00051 00052 00053 #ifndef OPENMESH_DECIMATER_MODNORMALFLIPPING_HH 00054 #define OPENMESH_DECIMATER_MODNORMALFLIPPING_HH 00055 00056 00057 //== INCLUDES ================================================================= 00058 00059 #include <OpenMesh/Tools/Decimater/ModBaseT.hh> 00060 00061 //== NAMESPACES =============================================================== 00062 00063 namespace OpenMesh { // BEGIN_NS_OPENMESH 00064 namespace Decimater { // BEGIN_NS_DECIMATER 00065 00066 00067 //== CLASS DEFINITION ========================================================= 00068 00077 template <typename DecimaterT> 00078 class ModNormalFlippingT : public ModBaseT< DecimaterT > 00079 { 00080 public: 00081 00082 DECIMATING_MODULE( ModNormalFlippingT, DecimaterT, NormalFlipping ); 00083 00084 public: 00085 00087 ModNormalFlippingT( DecimaterT &_dec) : Base(_dec, true) 00088 { 00089 set_max_normal_deviation( 90.0f ); 00090 } 00091 00092 00093 ~ModNormalFlippingT() 00094 { } 00095 00096 00097 public: 00098 00113 float collapse_priority(const CollapseInfo& _ci) 00114 { 00115 // simulate collapse 00116 Base::mesh().set_point(_ci.v0, _ci.p1); 00117 00118 // check for flipping normals 00119 typename Mesh::ConstVertexFaceIter vf_it(Base::mesh(), _ci.v0); 00120 typename Mesh::FaceHandle fh; 00121 typename Mesh::Scalar c(1.0); 00122 00123 for (; vf_it; ++vf_it) 00124 { 00125 fh = vf_it.handle(); 00126 if (fh != _ci.fl && fh != _ci.fr) 00127 { 00128 typename Mesh::Normal n1 = Base::mesh().normal(fh); 00129 typename Mesh::Normal n2 = Base::mesh().calc_face_normal(fh); 00130 00131 c = dot(n1, n2); 00132 00133 if (c < min_cos_) 00134 break; 00135 } 00136 } 00137 00138 // undo simulation changes 00139 Base::mesh().set_point(_ci.v0, _ci.p0); 00140 00141 return float( (c < min_cos_) ? Base::ILLEGAL_COLLAPSE : Base::LEGAL_COLLAPSE ); 00142 } 00143 00144 00145 00146 public: 00147 00149 float max_normal_deviation() const { return max_deviation_ / M_PI * 180.0; } 00150 00152 float normal_deviation() const { return max_normal_deviation(); } 00153 00159 void set_max_normal_deviation(float _f) { 00160 max_deviation_ = _f / 180.0 * M_PI; 00161 min_cos_ = cos(max_deviation_); 00162 } 00163 00165 void set_normal_deviation(float _f) 00166 { set_max_normal_deviation(_f); } 00167 00168 private: 00169 00170 // hide this method 00171 void set_binary(bool _b) {} 00172 00173 private: 00174 00175 // maximum normal deviation 00176 double max_deviation_, min_cos_; 00177 }; 00178 00179 00180 //============================================================================= 00181 } // END_NS_DECIMATER 00182 } // END_NS_OPENMESH 00183 //============================================================================= 00184 #endif // OPENACG_MODNORMALFLIPPING_HH defined 00185 //============================================================================= 00186