/******************************************************************************* * CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps * * version 0.1 * * Copyright (C) 2009, IGG Team, LSIIT, University of Strasbourg * * * * This library 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 2.1 of the License, or (at your * * option) any later version. * * * * This library 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 Lesser General Public License * * along with this library; if not, write to the Free Software Foundation, * * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * * * Web site: https://iggservis.u-strasbg.fr/CGoGN/ * * Contact information: cgogn@unistra.fr * * * *******************************************************************************/ #include "Algo/Geometry/basic.h" #include "Algo/Geometry/area.h" #include namespace CGoGN { namespace Algo { namespace Geometry { template typename PFP::VEC3 triangleNormal(typename PFP::MAP& map, Dart d, const typename PFP::TVEC3& position) { typedef typename PFP::VEC3 VEC3 ; VEC3 p1 = position[d]; VEC3 p2 = position[map.phi1(d)]; VEC3 p3 = position[map.phi_1(d)]; VEC3 N = Geom::triangleNormal(p1, p2, p3) ; N.normalize() ; return N ; } template typename PFP::VEC3 faceNormal(typename PFP::MAP& map, Dart d, const typename PFP::TVEC3& position) { typedef typename PFP::VEC3 VEC3 ; if(map.isFaceTriangle(d)) return triangleNormal(map, d, position) ; else { VEC3 N(0) ; Dart it = d ; do { VEC3 n = triangleNormal(map, it, position) ; //if(!std::isnan(n[0])) if (n[0] == n[0]) N += n ; it = map.phi1(it) ; } while (it != d) ; N.normalize() ; return N ; } } template typename PFP::VEC3 vertexNormal(typename PFP::MAP& map, Dart d, const typename PFP::TVEC3& position) { typedef typename PFP::VEC3 VEC3 ; VEC3 N(0) ; Dart it = d ; do { VEC3 n = faceNormal(map, it, position) ; VEC3 v1 = vectorOutOfDart(map, it, position) ; VEC3 v2 = vectorOutOfDart(map, map.phi_1(it), position) ; n *= convexFaceArea(map,it,position) / (v1.norm2() * v2.norm2()) ; N += n ; it = map.phi1(map.phi2(it)) ; } while (it != d) ; N.normalize() ; return N ; } template void computeNormalFaces(typename PFP::MAP& map, const typename PFP::TVEC3& position, typename PFP::TVEC3& face_normal, const FunctorSelect& select, unsigned int thread) { CellMarker marker(map, FACE_CELL,thread); for(Dart d = map.begin(); d != map.end(); map.next(d)) { if(select(d) && !marker.isMarked(d)) { marker.mark(d); face_normal[d] = faceNormal(map, d, position) ; } } } template void computeNormalVertices(typename PFP::MAP& map, const typename PFP::TVEC3& position, typename PFP::TVEC3& normal, const FunctorSelect& select, unsigned int thread) { CellMarker marker(map, VERTEX_CELL,thread); for(Dart d = map.begin(); d != map.end(); map.next(d)) { if(select(d) && !marker.isMarked(d)) { marker.mark(d); normal[d] = vertexNormal(map, d, position) ; } } } } // namespace Geometry } // namespace Algo } // namespace CGoGN