155 lines
4.4 KiB
C++
155 lines
4.4 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004-2016 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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#ifndef RINGWALKER_H
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#define RINGWALKER_H
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#include <vcg/simplex/face/jumping_pos.h>
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#include <vcg/complex/algorithms/update/flag.h>
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namespace vcg
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{
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namespace tri
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{
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/** \addtogroup trimesh */
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/*@{*/
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/*@{*/
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/** Class Mesh.
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This is class for extracting n-ring of vertexes or faces, starting from a vertex of a mesh.
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*/
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template <class MeshType>
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class Nring
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{
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public:
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typedef typename MeshType::FaceType FaceType;
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typedef typename MeshType::VertexType VertexType;
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typedef typename MeshType::ScalarType ScalarType;
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typedef typename MeshType::FaceIterator FaceIterator;
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typedef typename MeshType::VertexIterator VertexIterator;
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typedef typename MeshType::CoordType CoordType;
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std::vector<VertexType*> allV;
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std::vector<FaceType*> allF;
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std::vector<VertexType*> lastV;
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std::vector<FaceType*> lastF;
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MeshType* m;
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Nring(VertexType* v, MeshType* m) : m(m)
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{
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assert((unsigned)(v - &*m->vert.begin()) < m->vert.size());
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insertAndFlag(v);
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}
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~Nring()
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{
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clear();
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}
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void insertAndFlag1Ring(VertexType* v)
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{
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insertAndFlag(v);
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typename face::Pos<FaceType> p(v->VFp(),v);
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assert(p.V() == v);
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int count = 0;
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face::Pos<FaceType> ori = p;
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do
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{
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insertAndFlag(p.F());
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p.FlipF();
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p.FlipE();
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assert(count++ < 100);
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} while (ori != p);
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}
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void insertAndFlag(FaceType* f)
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{
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if (!f->IsV())
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{
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allF.push_back(f);
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lastF.push_back(f);
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f->SetV();
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insertAndFlag(f->V(0));
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insertAndFlag(f->V(1));
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insertAndFlag(f->V(2));
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}
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}
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void insertAndFlag(VertexType* v)
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{
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if (!v->IsV())
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{
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allV.push_back(v);
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lastV.push_back(v);
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v->SetV();
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}
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}
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static void clearFlags(MeshType* m)
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{
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tri::UpdateFlags<MeshType>::VertexClearV(*m);
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tri::UpdateFlags<MeshType>::FaceClearV(*m);
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}
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void clear()
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{
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for(unsigned i=0; i< allV.size(); ++i)
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allV[i]->ClearV();
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for(unsigned i=0; i< allF.size(); ++i)
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allF[i]->ClearV();
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allV.clear();
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allF.clear();
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}
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void expand()
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{
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std::vector<VertexType*> lastVtemp = lastV;
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lastV.clear();
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lastF.clear();
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for(typename std::vector<VertexType*>::iterator it = lastVtemp.begin(); it != lastVtemp.end(); ++it)
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{
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insertAndFlag1Ring(*it);
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}
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}
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void expand(int k)
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{
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for(int i=0;i<k;++i)
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expand();
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}
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};
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}} // end namespace NAMESPACE
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#endif // RINGWALKER_H
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