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MeshTopology.cpp
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MeshTopology.cpp
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/******************************************************************************
* SOFA, Simulation Open-Framework Architecture *
* (c) 2006 INRIA, USTL, UJF, CNRS, MGH *
* *
* This program 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 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 Lesser General Public License *
* for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*******************************************************************************
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#include <sofa/component/topology/container/constant/MeshTopology.h>
#include <sofa/core/topology/Topology.h>
#include <sofa/helper/visual/DrawTool.h>
#include <sofa/core/visual/VisualParams.h>
#include <sofa/core/ObjectFactory.h>
#include <algorithm>
namespace sofa::component::topology::container::constant
{
using type::vector;
using sofa::core::topology::edgesInTetrahedronArray;
using sofa::core::topology::edgesInHexahedronArray;
MeshTopology::EdgeUpdate::EdgeUpdate(MeshTopology* t)
:PrimitiveUpdate(t)
{
if( topology->hasVolume() )
{
addInput(&topology->seqHexahedra);
addInput(&topology->seqTetrahedra);
addOutput(&topology->seqEdges);
setDirtyValue();
}
else if( topology->hasSurface() )
{
addInput(&topology->seqTriangles);
addInput(&topology->seqQuads);
addOutput(&topology->seqEdges);
setDirtyValue();
}
}
void MeshTopology::EdgeUpdate::doUpdate()
{
if(topology->hasVolume() ) updateFromVolume();
else if(topology->hasSurface()) updateFromSurface();
}
void MeshTopology::EdgeUpdate::updateFromVolume()
{
typedef MeshTopology::SeqTetrahedra SeqTetrahedra;
typedef MeshTopology::SeqHexahedra SeqHexahedra;
typedef MeshTopology::SeqEdges SeqEdges;
typedef MeshTopology::Tetra Tetra;
typedef MeshTopology::Hexa Hexa;
SeqEdges& seqEdges = *topology->seqEdges.beginEdit();
seqEdges.clear();
std::map<Edge,unsigned int> edgeMap;
unsigned int edgeIndex;
const SeqTetrahedra& tetrahedra = topology->getTetrahedra(); // do not use seqTetrahedra directly as it might not be up-to-date
for (const auto& t : tetrahedra)
{
std::map<Edge,unsigned int>::iterator ite;
Edge e;
for (const auto j : edgesInTetrahedronArray)
{
unsigned int v1 = t[j[0]];
unsigned int v2 = t[j[1]];
// sort vertices in lexicographics order
if (v1<v2)
e=Edge(v1,v2);
else
e=Edge(v2,v1);
ite=edgeMap.find(e);
if (ite==edgeMap.end())
{
// edge not in edgeMap so create a new one
edgeIndex=(unsigned int)seqEdges.size();
edgeMap[e]=edgeIndex;
seqEdges.push_back(e);
}
// else
// {
// edgeIndex=(*ite).second;
// }
//m_edgesInTetrahedron[i][j]=edgeIndex;
}
}
// fjourdes :
// should the edgeMap be cleared here ? Sounds strange but it seems that is what was done in previous method.
const SeqHexahedra& hexahedra = topology->getHexahedra(); // do not use seqHexahedra directly as it might not be up-to-date
// create a temporary map to find redundant edges
/// create the m_edge array at the same time than it fills the m_edgesInHexahedron array
for (const auto& h : hexahedra)
{
std::map<Edge,unsigned int>::iterator ite;
Edge e;
for (const auto j : edgesInHexahedronArray)
{
unsigned int v1 = h[j[0]];
unsigned int v2 = h[j[1]];
// sort vertices in lexicographics order
if (v1<v2)
e=Edge(v1,v2);
else
e=Edge(v2,v1);
ite=edgeMap.find(e);
if (ite==edgeMap.end())
{
// edge not in edgeMap so create a new one
edgeIndex=(unsigned int)seqEdges.size();
edgeMap[e]=edgeIndex;
seqEdges.push_back(e);
}
// else
// {
// edgeIndex=(*ite).second;
// }
//m_edgesInHexahedron[i][j]=edgeIndex;
}
}
topology->seqEdges.endEdit();
}
void MeshTopology::EdgeUpdate::updateFromSurface()
{
typedef MeshTopology::SeqTriangles SeqTriangles;
typedef MeshTopology::SeqQuads SeqQuads;
typedef MeshTopology::SeqEdges SeqEdges;
typedef MeshTopology::Triangle Triangle;
typedef MeshTopology::Quad Quad;
std::map<Edge,unsigned int> edgeMap;
unsigned int edgeIndex;
SeqEdges& seqEdges = *topology->seqEdges.beginEdit();
seqEdges.clear();
const SeqTriangles& triangles = topology->getTriangles(); // do not use seqTriangles directly as it might not be up-to-date
for (const auto& t : triangles)
{
std::map<Edge,unsigned int>::iterator ite;
Edge e;
for (unsigned int j=0; j<3; ++j)
{
unsigned int v1=t[(j+1)%3];
unsigned int v2=t[(j+2)%3];
// sort vertices in lexicographics order
if (v1<v2)
e=Edge(v1,v2);
else
e=Edge(v2,v1);
ite=edgeMap.find(e);
if (ite==edgeMap.end())
{
// edge not in edgeMap so create a new one
edgeIndex=(unsigned int)seqEdges.size();
edgeMap[e]=edgeIndex;
// To be similar to TriangleSetTopologyContainer::createEdgeSetArray
//seqEdges.push_back(e); Changed to have oriented edges on the border of the triangulation.
seqEdges.push_back(Edge(v1, v2));
}
// else
// {
// edgeIndex=(*ite).second;
// }
//m_edgesInTriangle[i][j]=edgeIndex;
}
}
const SeqQuads& quads = topology->getQuads(); // do not use seqQuads directly as it might not be up-to-date
for (const auto& t : quads)
{
std::map<Edge,unsigned int>::iterator ite;
Edge e;
for (unsigned int j=0; j<4; ++j)
{
unsigned int v1=t[(j+1)%4];
unsigned int v2=t[(j+2)%4];
// sort vertices in lexicographics order
if (v1<v2)
e=Edge(v1,v2);
else
e=Edge(v2,v1);
ite=edgeMap.find(e);
if (ite==edgeMap.end())
{
// edge not in edgeMap so create a new one
edgeIndex=(unsigned int)seqEdges.size();
edgeMap[e]=edgeIndex;
seqEdges.push_back(e);
}
// else
// {
// edgeIndex=(*ite).second;
// }
//m_edgesInQuad[i][j]=edgeIndex;
}
}
topology->seqEdges.endEdit();
}
MeshTopology::TriangleUpdate::TriangleUpdate(MeshTopology *t)
:PrimitiveUpdate(t)
{
addInput(&topology->seqTetrahedra);
addOutput(&topology->seqTriangles);
setDirtyValue();
}
void MeshTopology::TriangleUpdate::doUpdate()
{
typedef MeshTopology::SeqTetrahedra SeqTetrahedra;
typedef MeshTopology::SeqTriangles SeqTriangles;
const SeqTetrahedra& tetrahedra = topology->getTetrahedra();
SeqTriangles& seqTriangles = *topology->seqTriangles.beginEdit();
seqTriangles.clear();
// create a temporary map to find redundant triangles
std::map<Triangle,unsigned int> triangleMap;
std::map<Triangle,unsigned int>::iterator itt;
Triangle tr;
unsigned int triangleIndex;
unsigned int v[3],val;
/// create the m_edge array at the same time than it fills the m_trianglesInTetrahedron array
for (unsigned int i = 0; i < tetrahedra.size(); ++i)
{
const Tetra &t=topology->seqTetrahedra.getValue()[i];
for (const auto j : sofa::core::topology::trianglesOrientationInTetrahedronArray)
{
for (PointID k=0; k<3; ++k)
v[k] = t[j[k]];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=val;
}
// check if a triangle with an opposite orientation already exists
tr=Triangle(v[0],v[2],v[1]);
itt=triangleMap.find(tr);
if (itt==triangleMap.end())
{
// edge not in edgeMap so create a new one
triangleIndex=(unsigned int)seqTriangles.size();
tr=Triangle(v[0],v[1],v[2]);
triangleMap[tr]=triangleIndex;
seqTriangles.push_back(tr);
}
}
}
topology->seqTriangles.endEdit();
}
MeshTopology::QuadUpdate::QuadUpdate(MeshTopology *t)
:PrimitiveUpdate(t)
{
addInput(&topology->seqHexahedra);
addOutput(&topology->seqQuads);
setDirtyValue();
}
void MeshTopology::QuadUpdate::doUpdate()
{
typedef MeshTopology::SeqHexahedra SeqHexahedra;
typedef MeshTopology::SeqQuads SeqQuads;
SeqQuads& seqQuads = *topology->seqQuads.beginEdit();
seqQuads.clear();
if (topology->getNbHexahedra()==0) return; // no hexahedra to extract edges from
const SeqHexahedra& hexahedra = topology->getHexahedra(); // do not use seqQuads directly as it might not be up-to-date
// create a temporary map to find redundant quads
std::map<Quad,unsigned int> quadMap;
std::map<Quad,unsigned int>::iterator itt;
Quad qu;
unsigned int v[4],val;
unsigned int quadIndex;
/// create the m_edge array at the same time than it fills the m_edgesInHexahedron array
for (const auto& h : hexahedra)
{
// Quad 0 :
v[0]=h[0]; v[1]=h[3]; v[2]=h[2]; v[3]=h[1];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]) || (v[0]>v[3]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=v[3]; v[3]=val;
}
//std::sort(v,v+1); std::sort(v,v+2); std::sort(v,v+3);
//std::sort(v+1,v+2); std::sort(v+1,v+3);
//std::sort(v+2,v+3);
// sort vertices in lexicographics order
qu=Quad(v[0],v[3],v[2],v[1]);
itt=quadMap.find(qu);
if (itt==quadMap.end())
{
// quad not in edgeMap so create a new one
quadIndex=(unsigned int)seqQuads.size();
quadMap[qu]=quadIndex;
qu=Quad(v[0],v[1],v[2],v[3]);
quadMap[qu]=quadIndex;
seqQuads.push_back(qu);
}
// else
// {
// quadIndex=(*itt).second;
// }
//m_quadsInHexahedron[i][0]=quadIndex;
// Quad 1 :
v[0]=h[4]; v[1]=h[5]; v[2]=h[6]; v[3]=h[7];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]) || (v[0]>v[3]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=v[3]; v[3]=val;
}
//std::sort(v,v+1); std::sort(v,v+2); std::sort(v,v+3);
//std::sort(v+1,v+2); std::sort(v+1,v+3);
//std::sort(v+2,v+3);
// sort vertices in lexicographics order
qu=Quad(v[0],v[3],v[2],v[1]);
itt=quadMap.find(qu);
if (itt==quadMap.end())
{
// quad not in edgeMap so create a new one
quadIndex=(unsigned int)seqQuads.size();
quadMap[qu]=quadIndex;
qu=Quad(v[0],v[1],v[2],v[3]);
quadMap[qu]=quadIndex;
seqQuads.push_back(qu);
}
// else
// {
// quadIndex=(*itt).second;
// }
//m_quadsInHexahedron[i][1]=quadIndex;
// Quad 2 :
v[0]=h[0]; v[1]=h[1]; v[2]=h[5]; v[3]=h[4];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]) || (v[0]>v[3]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=v[3]; v[3]=val;
}
//std::sort(v,v+1); std::sort(v,v+2); std::sort(v,v+3);
//std::sort(v+1,v+2); std::sort(v+1,v+3);
//std::sort(v+2,v+3);
// sort vertices in lexicographics order
qu=Quad(v[0],v[3],v[2],v[1]);
itt=quadMap.find(qu);
if (itt==quadMap.end())
{
// quad not in edgeMap so create a new one
quadIndex=(unsigned int)seqQuads.size();
quadMap[qu]=quadIndex;
qu=Quad(v[0],v[1],v[2],v[3]);
quadMap[qu]=quadIndex;
seqQuads.push_back(qu);
}
// else
// {
// quadIndex=(*itt).second;
// }
//m_quadsInHexahedron[i][2]=quadIndex;
// Quad 3 :
v[0]=h[1]; v[1]=h[2]; v[2]=h[6]; v[3]=h[5];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]) || (v[0]>v[3]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=v[3]; v[3]=val;
}
//std::sort(v,v+1); std::sort(v,v+2); std::sort(v,v+3);
//std::sort(v+1,v+2); std::sort(v+1,v+3);
//std::sort(v+2,v+3);
// sort vertices in lexicographics order
qu=Quad(v[0],v[3],v[2],v[1]);
itt=quadMap.find(qu);
if (itt==quadMap.end())
{
// quad not in edgeMap so create a new one
quadIndex=(unsigned int)topology->seqQuads.getValue().size();
quadMap[qu]=quadIndex;
qu=Quad(v[0],v[1],v[2],v[3]);
quadMap[qu]=quadIndex;
seqQuads.push_back(qu);
}
// else
// {
// quadIndex=(*itt).second;
// }
//m_quadsInHexahedron[i][3]=quadIndex;
// Quad 4 :
v[0]=h[2]; v[1]=h[3]; v[2]=h[7]; v[3]=h[6];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]) || (v[0]>v[3]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=v[3]; v[3]=val;
}
//std::sort(v,v+1); std::sort(v,v+2); std::sort(v,v+3);
//std::sort(v+1,v+2); std::sort(v+1,v+3);
//std::sort(v+2,v+3);
// sort vertices in lexicographics order
qu=Quad(v[0],v[3],v[2],v[1]);
itt=quadMap.find(qu);
if (itt==quadMap.end())
{
// quad not in edgeMap so create a new one
quadIndex=(unsigned int)seqQuads.size();
quadMap[qu]=quadIndex;
qu=Quad(v[0],v[1],v[2],v[3]);
quadMap[qu]=quadIndex;
seqQuads.push_back(qu);
}
// else
// {
// quadIndex=(*itt).second;
// }
//m_quadsInHexahedron[i][4]=quadIndex;
// Quad 5 :
v[0]=h[3]; v[1]=h[0]; v[2]=h[4]; v[3]=h[7];
// sort v such that v[0] is the smallest one
while ((v[0]>v[1]) || (v[0]>v[2]) || (v[0]>v[3]))
{
val=v[0]; v[0]=v[1]; v[1]=v[2]; v[2]=v[3]; v[3]=val;
}
//std::sort(v,v+1); std::sort(v,v+2); std::sort(v,v+3);
//std::sort(v+1,v+2); std::sort(v+1,v+3);
//std::sort(v+2,v+3);
// sort vertices in lexicographics order
qu=Quad(v[0],v[3],v[2],v[1]);
itt=quadMap.find(qu);
if (itt==quadMap.end())
{
// quad not in edgeMap so create a new one
quadIndex=(unsigned int)seqQuads.size();
quadMap[qu]=quadIndex;
qu=Quad(v[0],v[1],v[2],v[3]);
quadMap[qu]=quadIndex;
seqQuads.push_back(qu);
}
// else
// {
// quadIndex=(*itt).second;
// }
//m_quadsInHexahedron[i][5]=quadIndex;
}
topology->seqQuads.endEdit();
}
using namespace sofa::defaulttype;
using core::topology::BaseMeshTopology;
int MeshTopologyClass = core::RegisterObject("Generic mesh topology")
.addAlias("Mesh")
.add< MeshTopology >()
;
MeshTopology::MeshTopology()
: seqPoints(initData(&seqPoints,"position","List of point positions"))
, seqEdges(initData(&seqEdges,"edges","List of edge indices"))
, seqTriangles(initData(&seqTriangles,"triangles","List of triangle indices"))
, seqQuads(initData(&seqQuads,"quads","List of quad indices"))
, seqTetrahedra(initData(&seqTetrahedra,"tetrahedra","List of tetrahedron indices"))
, seqHexahedra(initData(&seqHexahedra,"hexahedra","List of hexahedron indices"))
, seqUVs(initData(&seqUVs,"uv","List of uv coordinates"))
, nbPoints(0)
, validTetrahedra(false), validHexahedra(false)
, revision(0)
, _drawEdges(initData(&_drawEdges, false, "drawEdges","if true, draw the topology Edges"))
, _drawTriangles(initData(&_drawTriangles, false, "drawTriangles","if true, draw the topology Triangles"))
, _drawQuads(initData(&_drawQuads, false, "drawQuads","if true, draw the topology Quads"))
, _drawTetra(initData(&_drawTetra, false, "drawTetrahedra","if true, draw the topology Tetrahedra"))
, _drawHexa(initData(&_drawHexa, false, "drawHexahedra","if true, draw the topology hexahedra"))
{
m_upperElementType = sofa::geometry::ElementType::EDGE;
addAlias(&seqPoints,"points");
addAlias(&seqEdges,"lines");
addAlias(&seqTetrahedra,"tetras");
addAlias(&seqHexahedra,"hexas");
addAlias(&seqUVs,"texcoords");
}
void MeshTopology::init()
{
BaseMeshTopology::init();
const auto hexahedra = sofa::helper::getReadAccessor(seqHexahedra);
const auto tetrahedra = sofa::helper::getReadAccessor(seqTetrahedra);
const auto quads = sofa::helper::getReadAccessor(seqQuads);
const auto triangles = sofa::helper::getReadAccessor(seqTriangles);
const auto edges = sofa::helper::getReadAccessor(seqEdges);
// looking for upper topology
if (!hexahedra.empty())
m_upperElementType = geometry::ElementType::HEXAHEDRON;
else if (!tetrahedra.empty())
m_upperElementType = sofa::geometry::ElementType::TETRAHEDRON;
else if (!quads.empty())
m_upperElementType = sofa::geometry::ElementType::QUAD;
else if (!triangles.empty())
m_upperElementType = sofa::geometry::ElementType::TRIANGLE;
else if (!edges.empty())
m_upperElementType = sofa::geometry::ElementType::EDGE;
else
m_upperElementType = sofa::geometry::ElementType::POINT;
// compute the number of points, if the topology is charged from the scene or if it was loaded from a MeshLoader without any points data.
if (nbPoints==0)
{
unsigned int n = 0;
const auto countPoints = [&n](const auto& seqElements)
{
for (const auto& element : seqElements)
{
for (const auto pointId : element)
{
if (n <= pointId)
{
n = 1 + pointId;
}
}
}
};
countPoints(edges);
countPoints(triangles);
countPoints(quads);
countPoints(tetrahedra);
countPoints(hexahedra);
nbPoints = n;
}
if(edges.empty() )
{
if(seqEdges.getParent() != nullptr )
{
seqEdges.delInput(seqEdges.getParent());
}
const EdgeUpdate::SPtr edgeUpdate = sofa::core::objectmodel::New<EdgeUpdate>(this);
edgeUpdate->setName("edgeUpdate");
this->addSlave(edgeUpdate);
}
if(triangles.empty() )
{
if(seqTriangles.getParent() != nullptr)
{
seqTriangles.delInput(seqTriangles.getParent());
}
const TriangleUpdate::SPtr triangleUpdate = sofa::core::objectmodel::New<TriangleUpdate>(this);
triangleUpdate->setName("triangleUpdate");
this->addSlave(triangleUpdate);
}
if(quads.empty() )
{
if(seqQuads.getParent() != nullptr )
{
seqQuads.delInput(seqQuads.getParent());
}
const QuadUpdate::SPtr quadUpdate = sofa::core::objectmodel::New<QuadUpdate>(this);
quadUpdate->setName("quadUpdate");
this->addSlave(quadUpdate);
}
}
void MeshTopology::clear()
{
nbPoints = 0;
helper::getWriteOnlyAccessor(seqPoints).clear();
helper::getWriteOnlyAccessor(seqEdges).clear();
helper::getWriteOnlyAccessor(seqTriangles).clear();
helper::getWriteOnlyAccessor(seqQuads).clear();
helper::getWriteOnlyAccessor(seqTetrahedra).clear();
helper::getWriteOnlyAccessor(seqHexahedra).clear();
helper::getWriteOnlyAccessor(seqUVs).clear();
invalidate();
}
void MeshTopology::addPoint(SReal px, SReal py, SReal pz)
{
seqPoints.beginEdit()->push_back(type::Vec3((SReal)px, (SReal)py, (SReal)pz));
seqPoints.endEdit();
if (seqPoints.getValue().size() > nbPoints)
nbPoints = (int)seqPoints.getValue().size();
}
void MeshTopology::addEdge( Index a, Index b )
{
seqEdges.beginEdit()->push_back(Edge(a,b));
seqEdges.endEdit();
if (a >= nbPoints) nbPoints = a+1;
if (b >= nbPoints) nbPoints = b+1;
}
void MeshTopology::addTriangle( Index a, Index b, Index c )
{
seqTriangles.beginEdit()->push_back( Triangle(a,b,c) );
seqTriangles.endEdit();
if (a >= nbPoints) nbPoints = a+1;
if (b >= nbPoints) nbPoints = b+1;
if (c >= nbPoints) nbPoints = c+1;
}
void MeshTopology::addQuad(Index a, Index b, Index c, Index d)
{
seqQuads.beginEdit()->push_back(Quad(a,b,c,d));
seqQuads.endEdit();
if (a >= nbPoints) nbPoints = a+1;
if (b >= nbPoints) nbPoints = b+1;
if (c >= nbPoints) nbPoints = c+1;
if (d >= nbPoints) nbPoints = d+1;
}
void MeshTopology::addTetra( Index a, Index b, Index c, Index d )
{
seqTetrahedra.beginEdit()->push_back( Tetra(a,b,c,d) );
seqTetrahedra.endEdit();
if (a >= nbPoints) nbPoints = a+1;
if (b >= nbPoints) nbPoints = b+1;
if (c >= nbPoints) nbPoints = c+1;
if (d >= nbPoints) nbPoints = d+1;
}
void MeshTopology::addHexa(Index p1, Index p2, Index p3, Index p4, Index p5, Index p6, Index p7, Index p8)
{
seqHexahedra.beginEdit()->push_back(Hexa(p1,p2,p3,p4,p5,p6,p7,p8));
seqHexahedra.endEdit();
if (p1 >= nbPoints) nbPoints = p1+1;
if (p2 >= nbPoints) nbPoints = p2+1;
if (p3 >= nbPoints) nbPoints = p3+1;
if (p4 >= nbPoints) nbPoints = p4+1;
if (p5 >= nbPoints) nbPoints = p5+1;
if (p6 >= nbPoints) nbPoints = p6+1;
if (p7 >= nbPoints) nbPoints = p7+1;
if (p8 >= nbPoints) nbPoints = p8+1;
}
void MeshTopology::addUV(SReal u, SReal v)
{
seqUVs.beginEdit()->push_back(type::Vec<2,SReal>((SReal)u, (SReal)v));
seqUVs.endEdit();
if (seqUVs.getValue().size() > nbPoints)
nbPoints = (int)seqUVs.getValue().size();
}
const MeshTopology::SeqEdges& MeshTopology::getEdges()
{
return seqEdges.getValue();
}
const MeshTopology::SeqTriangles& MeshTopology::getTriangles()
{
return seqTriangles.getValue();
}
const MeshTopology::SeqQuads& MeshTopology::getQuads()
{
return seqQuads.getValue();
}
const MeshTopology::SeqTetrahedra& MeshTopology::getTetrahedra()
{
if (!validTetrahedra)
{
updateTetrahedra();
validTetrahedra = true;
}
return seqTetrahedra.getValue();
}
const MeshTopology::SeqHexahedra& MeshTopology::getHexahedra()
{
if (!validHexahedra)
{
updateHexahedra();
validHexahedra = true;
}
return seqHexahedra.getValue();
}
const MeshTopology::SeqUV& MeshTopology::getUVs()
{
return seqUVs.getValue();
}
Size MeshTopology::getNbPoints() const
{
return nbPoints;
}
void MeshTopology::setNbPoints(Size n)
{
nbPoints = n;
}
Size MeshTopology::getNbEdges()
{
return Size(getEdges().size());
}
Size MeshTopology::getNbTriangles()
{
return Size(getTriangles().size());
}
Size MeshTopology::getNbQuads()
{
return Size(getQuads().size());
}
Size MeshTopology::getNbTetrahedra()
{
return Size(getTetrahedra().size());
}
Size MeshTopology::getNbHexahedra()
{
return Size(getHexahedra().size());
}
Size MeshTopology::getNbUVs()
{
return Size(getUVs().size());
}
const MeshTopology::Edge MeshTopology::getEdge(Index i)
{
return getEdges()[i];
}
const MeshTopology::Triangle MeshTopology::getTriangle(Index i)
{
return getTriangles()[i];
}
const MeshTopology::Quad MeshTopology::getQuad(Index i)
{
return getQuads()[i];
}
const MeshTopology::Tetra MeshTopology::getTetrahedron(Index i)
{
return getTetrahedra()[i];
}
const MeshTopology::Hexa MeshTopology::getHexahedron(Index i)
{
return getHexahedra()[i];
}
const MeshTopology::UV MeshTopology::getUV(Index i)
{
return getUVs()[i];
}
void MeshTopology::createEdgesAroundVertexArray ()
{
const SeqEdges& edges = getEdges();
m_edgesAroundVertex.clear();
m_edgesAroundVertex.resize( nbPoints );
/*....
if (getNbTetrahedra() || getNbHexahedra())
{ // Unordered shells if the mesh is volumic
for (unsigned int i = 0; i < edges.size(); ++i)
{
// adding edge i in the edge shell of both points
m_edgesAroundVertex[ edges[i][0] ].push_back( i );
m_edgesAroundVertex[ edges[i][1] ].push_back( i );
}
}
else if (getNbTriangles() || getNbQuads())
{ // order edges in consistent order if possible (i.e. on manifold meshes)
bool createdTriangleShell = getNbTriangles() && m_edgesInTriangle.empty();
bool createdQuadShell = getNbQuads() && m_edgesInQuad.empty();
if (createdTriangleShell) createTrianglesAroundVertexArray();
if (createdQuadShell) createQuadsAroundVertexArray();
const SeqTriangles& triangles = getTriangles();
const SeqQuads& quads = getQuads();
}
else*/
{
// 1D mesh : put inbound edges before outbound edges
for (unsigned int i = 0; i < edges.size(); ++i)
{
// adding edge i in the edge shell of both points
m_edgesAroundVertex[ edges[i][0] ].push_back( i );
m_edgesAroundVertex[ edges[i][1] ].push_back( i );
}
}
}
void MeshTopology::createEdgesInTriangleArray ()
{
//const SeqEdges& edges = getEdges(); // do not use seqEdges directly as it might not be up-to-date
const SeqTriangles& triangles = getTriangles(); // do not use seqTriangles directly as it might not be up-to-date
m_edgesInTriangle.clear();
m_edgesInTriangle.resize(triangles.size());
for (unsigned int i = 0; i < triangles.size(); ++i)
{
const Triangle &t=triangles[i];
// adding edge i in the edge shell of both points
for (unsigned int j=0; j<3; ++j)
{
const EdgeID edgeIndex=getEdgeIndex(t[(j+1)%3],t[(j+2)%3]);
assert(edgeIndex != InvalidID);
m_edgesInTriangle[i][j]=edgeIndex;
}
}
}
void MeshTopology::createEdgesInQuadArray ()
{
//const SeqEdges& edges = getEdges(); // do not use seqEdges directly as it might not be up-to-date
const SeqQuads& quads = getQuads(); // do not use seqQuads directly as it might not be up-to-date
m_edgesInQuad.clear();
m_edgesInQuad.resize(quads.size());
for (unsigned int i = 0; i < quads.size(); ++i)
{
const Quad &t=quads[i];
// adding edge i in the edge shell of both points
for (unsigned int j=0; j<4; ++j)
{
const EdgeID edgeIndex = getEdgeIndex(t[(j+1)%4],t[(j+2)%4]);
assert(edgeIndex != InvalidID);
m_edgesInQuad[i][j]=edgeIndex;
}
}
}
void MeshTopology::createEdgesInTetrahedronArray ()
{
//const SeqEdges& edges = getEdges(); // do not use seqEdges directly as it might not be up-to-date
const SeqTetrahedra& tetrahedra = getTetrahedra(); // do not use seqTetrahedra directly as it might not be up-to-date
m_edgesInTetrahedron.clear();
m_edgesInTetrahedron.resize(tetrahedra.size());
for (unsigned int i = 0; i < tetrahedra.size(); ++i)
{
const Tetra &t=tetrahedra[i];
// adding edge i in the edge shell of both points
for (unsigned int j=0; j<6; ++j)
{
const EdgeID edgeIndex = getEdgeIndex(t[edgesInTetrahedronArray[j][0]], t[edgesInTetrahedronArray[j][1]]);
assert(edgeIndex != InvalidID);
m_edgesInTetrahedron[i][j]=edgeIndex;
}
}
}
void MeshTopology::createEdgesInHexahedronArray ()
{
//const SeqEdges& edges = getEdges(); // do not use seqEdges directly as it might not be up-to-date
//getEdges();
const SeqHexahedra& hexahedra = getHexahedra(); // do not use seqHexahedra directly as it might not be up-to-date
m_edgesInHexahedron.clear();
m_edgesInHexahedron.resize(hexahedra.size());
for (unsigned int i = 0; i < hexahedra.size(); ++i)
{
const Hexa &h=hexahedra[i];
// adding edge i in the edge shell of both points
for (unsigned int j=0; j<12; ++j)
{
const EdgeID edgeIndex = getEdgeIndex(h[edgesInHexahedronArray[j][0]], h[edgesInHexahedronArray[j][1]]);
assert(edgeIndex != InvalidID);
m_edgesInHexahedron[i][j]=edgeIndex;
}
}
}
void MeshTopology::createTrianglesAroundVertexArray ()
{
const SeqTriangles& triangles = getTriangles(); // do not use seqTriangles directly as it might not be up-to-date
m_trianglesAroundVertex.clear();
m_trianglesAroundVertex.resize( nbPoints );
for (unsigned int i = 0; i < triangles.size(); ++i)
{
// adding triangle i in the triangle shell of all points
for (unsigned int j=0; j<3; ++j)
m_trianglesAroundVertex[ triangles[i][j] ].push_back( i );
}
}
void MeshTopology::createOrientedTrianglesAroundVertexArray()
{
if (m_edgesAroundVertex.size() == 0)
createEdgesAroundVertexArray();
const SeqEdges& edges = getEdges();
m_orientedTrianglesAroundVertex.clear();
m_orientedTrianglesAroundVertex.resize(nbPoints);
m_orientedEdgesAroundVertex.clear();
m_orientedEdgesAroundVertex.resize(nbPoints);
for(unsigned int i = 0; i < (unsigned int)nbPoints; ++i)
//for each point: i
{
unsigned int startEdge = InvalidID;
unsigned int currentEdge = InvalidID;
unsigned int nextEdge = InvalidID;
unsigned int lastTri = InvalidID;
// skip points not attached to any edge
if (m_edgesAroundVertex[i].empty()) continue;
//find the start edge for a boundary point
for(unsigned int j = 0; j < m_edgesAroundVertex[i].size() && startEdge == InvalidID; ++j)
//for each edge adjacent to the point: m_edgesAroundVertex[i][j]
{
const TrianglesAroundEdge& eTris = getTrianglesAroundEdge(m_edgesAroundVertex[i][j]);
if(eTris.size() == 1)
//m_edgesAroundVertex[i][j] is a boundary edge, test whether it is the start edge
{
//find out if there is a next edge in the right orientation around the point i
const EdgesInTriangle& tEdges = getEdgesInTriangle(eTris[0]);
for(unsigned int k = 0; k < tEdges.size() && startEdge == InvalidID; ++k)
//for each edge of the triangle: tEdges[k]
{
if(tEdges[k] != m_edgesAroundVertex[i][j])
// pick up the edge which is not the current one
{
for(unsigned int p = 0; p < 2; ++p)
//for each end point of the edge: edges[tEdges[k]][p]
{
if(edges[tEdges[k]][p] == i)
// pick up the edge starting from point i
{
if(-1 == computeRelativeOrientationInTri(i, edges[tEdges[k]][(p+1)%2], eTris[0]))
// pick up the edge with the consistent orientation (the same orientation as the triangle)
{
startEdge = m_edgesAroundVertex[i][j];
currentEdge = startEdge;
nextEdge = tEdges[k];
m_orientedTrianglesAroundVertex[i].push_back(eTris[0]);
m_orientedEdgesAroundVertex[i].push_back(currentEdge);
lastTri = eTris[0];
break;
}
}
}
}
}
}
}
//set a start edge for the non-boundary point
if(startEdge == InvalidID)
{
startEdge = m_edgesAroundVertex[i][0];
currentEdge = startEdge;
//find the next edge around the point i
const TrianglesAroundEdge& eTris = getTrianglesAroundEdge(currentEdge);
for(unsigned int j = 0; j < eTris.size() && nextEdge == InvalidID; ++j)
//for each triangle adjacent to the currentEdge: eTris[j]
{
const EdgesInTriangle& tEdges = getEdgesInTriangle(eTris[j]);