/**************************************************************************** * VCGLib o o * * Visual and Computer Graphics Library o o * * _ O _ * * Copyright(C) 2004 \/)\/ * * Visual Computing Lab /\/| * * ISTI - Italian National Research Council | * * \ * * All rights reserved. * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * * (at your option) any later version. * * * * This program 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 General Public License (http://www.gnu.org/licenses/gpl.txt) * * for more details. * * * ****************************************************************************/ /**************************************************************************** History $Log: not supported by cvs2svn $ Revision 1.18 2007/12/13 17:57:27 cignoni removed harmless gcc warnings Revision 1.17 2007/11/23 17:02:47 cignoni disambiguated pow call (again) Revision 1.16 2007/11/23 15:42:11 cignoni disambiguated pow call Revision 1.15 2007/11/14 11:56:23 ganovelli added updating of vertex and face normals Revision 1.14 2007/07/12 23:11:35 cignoni added the missing PerVertexNormalizedPerFaceNormalized Revision 1.13 2007/01/10 17:25:14 matteodelle *** empty log message *** Revision 1.12 2006/11/07 15:13:56 zifnab1974 Necessary changes for compilation with gcc 3.4.6. Especially the hash function is a problem Revision 1.11 2005/12/06 18:22:31 pietroni changed FaceType::ComputeNormal and FaceType::ComputeNormalizedNormal with face::ComputeNormal and face::ComputeNormalizedNormal Revision 1.10 2005/12/06 15:30:45 ponchio added #include triangle3.h for Normal(...) added a few FaceType:: instead of face:: Revision 1.9 2005/11/22 15:47:34 cignoni Moved ComputeNormal and ComputeNormalizedNormal out of the face class (no more a member function!) Revision 1.8 2005/11/21 21:44:43 cignoni Moved ComputeNormal and ComputeNormalizedNormal out of the face class (no more a member function!) Revision 1.7 2005/10/13 08:38:00 cignoni removed the access to the face member function normal and substituted with vcg::normal(*f); Revision 1.6 2005/06/17 00:46:09 cignoni Added a PerVertexNormalizedPerFace (vertex are face/area weighted AND normalized) Revision 1.5 2005/04/01 13:04:55 fiorin Minor changes Revision 1.4 2004/09/09 14:35:14 ponchio Typename changes for linux Revision 1.3 2004/08/31 15:18:54 pietroni minor changes to comply gcc compiler (typename's ) Revision 1.2 2004/03/12 15:22:19 cignoni Written some documentation and added to the trimes doxygen module Revision 1.1 2004/03/05 10:59:24 cignoni Changed name from plural to singular (normals->normal) Revision 1.1 2004/03/04 00:05:50 cignoni First working version! Revision 1.1 2004/02/19 13:11:06 cignoni Initial commit ****************************************************************************/ #ifndef __VCG_TRI_UPDATE_NORMALS #define __VCG_TRI_UPDATE_NORMALS #include #include namespace vcg { namespace tri { /** \addtogroup trimesh */ /*@{*/ /// Management, updating and computation of per-vertex and per-face normals. /// This class is used to compute or update the normals that can be stored in the vertex or face component of a mesh. template class UpdateNormals { public: typedef ComputeMeshType MeshType; typedef typename MeshType::VertexType VertexType; typedef typename VertexType::NormalType NormalType; typedef typename VertexType::ScalarType ScalarType; typedef typename MeshType::VertexPointer VertexPointer; typedef typename MeshType::VertexIterator VertexIterator; typedef typename MeshType::FaceType FaceType; typedef typename MeshType::FacePointer FacePointer; typedef typename MeshType::FaceIterator FaceIterator; /// Calculates the vertex normal (if stored in the current face type) static void PerFace(ComputeMeshType &m) { if( !m.HasPerFaceNormal()) return; FaceIterator f; for(f=m.face.begin();f!=m.face.end();++f) if( !(*f).IsD() ) face::ComputeNormal(*f); } /// Calculates the vertex normal. Without exploiting or touching face normals /// The normal of a vertex v is the weigthed average of the normals of the faces incident on v. static void PerVertex(ComputeMeshType &m) { if( !m.HasPerVertexNormal()) return; VertexIterator vi; for(vi=m.vert.begin();vi!=m.vert.end();++vi) if( !(*vi).IsD() && (*vi).IsRW() ) (*vi).N() = NormalType((ScalarType)0,(ScalarType)0,(ScalarType)0); FaceIterator f; for(f=m.face.begin();f!=m.face.end();++f) if( !(*f).IsD() && (*f).IsR() ) { //typename FaceType::NormalType t = (*f).Normal(); typename FaceType::NormalType t = vcg::Normal(*f); for(int j=0; j<3; ++j) if( !(*f).V(j)->IsD() && (*f).V(j)->IsRW() ) (*f).V(j)->N() += t; } } /// Calculates both vertex and face normals. /// The normal of a vertex v is the weigthed average of the normals of the faces incident on v. static void PerVertexPerFace(ComputeMeshType &m) { if( !m.HasPerVertexNormal() || !m.HasPerFaceNormal()) return; PerFace(m); VertexIterator vi; for(vi=m.vert.begin();vi!=m.vert.end();++vi) if( !(*vi).IsD() && (*vi).IsRW() ) (*vi).N() = NormalType((ScalarType)0,(ScalarType)0,(ScalarType)0); FaceIterator f; for(f=m.face.begin();f!=m.face.end();++f) if( !(*f).IsD() && (*f).IsR() ) { for(int j=0; j<3; ++j) if( !(*f).V(j)->IsD() && (*f).V(j)->IsRW() ) (*f).V(j)->N() += (*f).cN(); } } /// Calculates both vertex and face normals. /// The normal of a vertex v is the weigthed average of the normals of the faces incident on v. static void PerVertexNormalizedPerFace(ComputeMeshType &m) { PerVertexPerFace(m); VertexIterator vi; for(vi=m.vert.begin();vi!=m.vert.end();++vi) if( !(*vi).IsD() && (*vi).IsRW() ) (*vi).N().Normalize(); } static void PerVertexNormalizedPerFaceNormalized(ComputeMeshType &m) { PerVertexNormalizedPerFace(m); FaceIterator fi; for(fi=m.face.begin();fi!=m.face.end();++fi) if( !(*fi).IsD() ) (*fi).N().Normalize();} static void PerFaceRW(ComputeMeshType &m, bool normalize=false) { if( !m.HasPerFaceNormal()) return; FaceIterator f; bool cn = true; if(normalize) { for(f=m.m.face.begin();f!=m.m.face.end();++f) if( !(*f).IsD() && (*f).IsRW() ) { for(int j=0; j<3; ++j) if( !(*f).V(j)->IsR()) cn = false; if( cn ) face::ComputeNormalizedNormal(*f); cn = true; } } else { for(f=m.m.face.begin();f!=m.m.face.end();++f) if( !(*f).IsD() && (*f).IsRW() ) { for(int j=0; j<3; ++j) if( !(*f).V(j)->IsR()) cn = false; if( cn ) (*f).ComputeNormal(); cn = true; } } } static void PerFaceNormalized(ComputeMeshType &m) { if( !m.HasPerFaceNormal()) return; FaceIterator f; for(f=m.face.begin();f!=m.face.end();++f) if( !(*f).IsD() ) face::ComputeNormalizedNormal(*f); } /// Calculates the vertex normal static void PerVertexNormalized(ComputeMeshType &m) { if( !m.HasPerVertexNormal()) return; PerVertex(m); for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if( !(*vi).IsD() && (*vi).IsRW() ) (*vi).N().Normalize(); } /// multiply the vertex normals by the matrix passed. By default, the scale component is removed static void PerVertexMatrix(ComputeMeshType &m, const Matrix44 &mat, bool remove_scaling= true){ float scale; Matrix33 mat33(mat,3); if( !m.HasPerVertexNormal()) return; if(remove_scaling){ scale = pow(mat33.Determinant(),(ScalarType)(1.0/3.0)); mat33[0][0]/=scale; mat33[1][1]/=scale; mat33[2][2]/=scale; } for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi) if( !(*vi).IsD() && (*vi).IsRW() ) (*vi).N() = mat33*(*vi).N(); } /// multiply the face normals by the matrix passed. By default, the scale component is removed static void PerFaceMatrix(ComputeMeshType &m, const Matrix44 &mat, bool remove_scaling= true){ float scale; Matrix33 mat33(mat,3); if( !m.HasPerFaceNormal()) return; if(remove_scaling){ scale = pow(mat33.Determinant(),ScalarType(1.0/3.0)); mat33[0][0]/=scale; mat33[1][1]/=scale; mat33[2][2]/=scale; } for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi) if( !(*fi).IsD() && (*fi).IsRW() ) (*fi).N() = mat33* (*fi).N(); } }; // end class } // End namespace } // End namespace #endif