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// This file is part of ff3d - http://www.freefem.org/ff3d
// Copyright (C) 2001, 2002, 2003 Stphane Del Pino
// 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, 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 for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// $Id: MeshDomainTetrahedrizor.cpp,v 1.5 2005/11/13 18:08:16 delpinux Exp $
#include <MeshOfTetrahedra.hpp>
#include <MeshDomainTetrahedrizor.hpp>
#include <set>
void
MeshDomainTetrahedrizor::
run(const bool& builtLocalizationTools)
{
// We don't need connectivity to be built
this->MeshTetrahedrizor::run(false);
const Domain& d = *__domain;
const MeshOfTetrahedra& fullMesh
= static_cast<const MeshOfTetrahedra&>(*__mesh);
// List of vertices that are inside the domain
Vector<bool> insideVertices(fullMesh.numberOfVertices());
for (size_t i=0; i<fullMesh.numberOfVertices(); ++i) {
insideVertices[i] = d.inside(fullMesh.vertex(i));
}
// Set of tetrahedra that will be kept
typedef std::set<const Tetrahedron*> KeptTetrahedra;
KeptTetrahedra keptTetrahedra;
for (MeshOfTetrahedra::const_iterator i(fullMesh);
not(i.end()); ++i) {
const Tetrahedron& t = *i;
for (int l=0; l<MeshOfTetrahedra::CellType::NumberOfVertices; ++l) {
if (insideVertices[fullMesh.vertexNumber(t(l))]) {
keptTetrahedra.insert(&t);
}
}
}
ffout(3) << "- keeping " << keptTetrahedra.size()
<< " tetrahedra over " << fullMesh.numberOfCells()
<< '\n';
// new create list of kept vertices
typedef std::map<size_t, size_t> KeptVerticesNumbers;
KeptVerticesNumbers keptVerticesNumbers;
size_t vertexNumber = 0;
for (KeptTetrahedra::const_iterator i = keptTetrahedra.begin();
i != keptTetrahedra.end(); ++i) {
const Tetrahedron& t = **i;
for (int l=0; l<MeshOfTetrahedra::CellType::NumberOfVertices; ++l) {
const size_t globalVertexNumber = fullMesh.vertexNumber(t(l));
if (keptVerticesNumbers.find(globalVertexNumber)
== keptVerticesNumbers.end()) {
keptVerticesNumbers[globalVertexNumber] = vertexNumber;
vertexNumber++;
}
}
}
VerticesSet* pVerticesSet = new VerticesSet(keptVerticesNumbers.size());
VerticesSet& verticesSet = *pVerticesSet;
VerticesCorrespondance* pCorrespondances
= new VerticesCorrespondance(keptVerticesNumbers.size());
VerticesCorrespondance& correspondances = *pCorrespondances;
// renumbers vertices correspondances
std::map<size_t, size_t> keptCorrespondances;
for (KeptVerticesNumbers::const_iterator i = keptVerticesNumbers.begin();
i != keptVerticesNumbers.end(); ++i) {
keptCorrespondances[fullMesh.correspondance(i->first)] = 0;
}
{
size_t n = 0;
for (std::map<size_t, size_t>::iterator i = keptCorrespondances.begin();
i != keptCorrespondances.end(); ++i) {
i->second = n;
n++;
}
}
// Copies usefull vertices
for (KeptVerticesNumbers::const_iterator i = keptVerticesNumbers.begin();
i != keptVerticesNumbers.end(); ++i) {
verticesSet[i->second] = fullMesh.vertex(i->first);
correspondances[i->second] = keptVerticesNumbers[fullMesh.correspondance(i->first)];
}
Vector<Tetrahedron>* pTetrahedra
= new Vector<Tetrahedron>(keptTetrahedra.size());
Vector<Tetrahedron>& tetrahedra = *pTetrahedra;
size_t tetrahedronNumber = 0;
for (KeptTetrahedra::const_iterator i = keptTetrahedra.begin();
i != keptTetrahedra.end(); ++i) {
const Tetrahedron& T = **i;
tetrahedra[tetrahedronNumber]
= Tetrahedron(verticesSet[keptVerticesNumbers[fullMesh.vertexNumber(T(0))]],
verticesSet[keptVerticesNumbers[fullMesh.vertexNumber(T(1))]],
verticesSet[keptVerticesNumbers[fullMesh.vertexNumber(T(2))]],
verticesSet[keptVerticesNumbers[fullMesh.vertexNumber(T(3))]],
T.reference());
tetrahedronNumber++;
}
MeshOfTetrahedra* meshOfTetrahedra
= new MeshOfTetrahedra(pVerticesSet,
pCorrespondances,
pTetrahedra,
0); // <= Border mesh of triangles
__mesh = meshOfTetrahedra;
}
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