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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004-2016 \/)\/ *
* 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. *
* *
****************************************************************************/
#ifndef RINGWALKER_H
#define RINGWALKER_H
#include <vcg/simplex/face/jumping_pos.h>
namespace vcg
{
namespace tri
{
/** \addtogroup trimesh */
/*@{*/
/*@{*/
/** Class Mesh.
This is class for extracting n-ring of vertexes or faces, starting from a vertex of a mesh.
*/
template <class MeshType>
class Nring
{
public:
typedef typename MeshType::FaceType FaceType;
typedef typename MeshType::VertexType VertexType;
typedef typename MeshType::ScalarType ScalarType;
typedef typename MeshType::FaceIterator FaceIterator;
typedef typename MeshType::VertexIterator VertexIterator;
typedef typename MeshType::CoordType CoordType;
std::vector<VertexType*> allV;
std::vector<FaceType*> allF;
std::vector<VertexType*> lastV;
std::vector<FaceType*> lastF;
MeshType* m;
Nring(VertexType* v, MeshType* m) : m(m)
{
assert((unsigned)(v - &*m->vert.begin()) < m->vert.size());
insertAndFlag(v);
}
~Nring()
{
clear();
}
void insertAndFlag1Ring(VertexType* v)
{
insertAndFlag(v);
typename face::Pos<FaceType> p(v->VFp(),v);
assert(p.V() == v);
int count = 0;
face::Pos<FaceType> ori = p;
do
{
insertAndFlag(p.F());
p.FlipF();
p.FlipE();
assert(count++ < 100);
} while (ori != p);
}
void insertAndFlag(FaceType* f)
{
if (!f->IsV())
{
allF.push_back(f);
lastF.push_back(f);
f->SetV();
insertAndFlag(f->V(0));
insertAndFlag(f->V(1));
insertAndFlag(f->V(2));
}
}
void insertAndFlag(VertexType* v)
{
if (!v->IsV())
{
allV.push_back(v);
lastV.push_back(v);
v->SetV();
}
}
static void clearFlags(MeshType* m)
{
tri::UpdateFlags<MeshType>::VertexClearV(*m);
tri::UpdateFlags<MeshType>::FaceClearV(*m);
}
void clear()
{
for(unsigned i=0; i< allV.size(); ++i)
allV[i]->ClearV();
for(unsigned i=0; i< allF.size(); ++i)
allF[i]->ClearV();
allV.clear();
allF.clear();
}
void expand()
{
std::vector<VertexType*> lastVtemp = lastV;
lastV.clear();
lastF.clear();
for(typename std::vector<VertexType*>::iterator it = lastVtemp.begin(); it != lastVtemp.end(); ++it)
{
insertAndFlag1Ring(*it);
}
}
void expand(int k)
{
for(int i=0;i<k;++i)
expand();
}
};
}} // end namespace NAMESPACE
#endif // RINGWALKER_H
|
