void TriangleSetTopologyContainer::createTrianglesAroundVertexArray ()
{
if(!hasTriangles()) // this method should only be called when triangles exist
{
#ifndef NDEBUG
sout << "Warning. [TriangleSetTopologyContainer::createTrianglesAroundVertexArray] triangle array is empty." << sendl;
#endif
createTriangleSetArray();
}
if(hasTrianglesAroundVertex())
{
clearTrianglesAroundVertex();
}
m_trianglesAroundVertex.resize( getNbPoints() );
helper::ReadAccessor< Data< sofa::helper::vector<Triangle> > > m_triangle = d_triangle;
for (unsigned int i = 0; i < m_triangle.size(); ++i)
{
// adding edge i in the edge shell of both points
for (unsigned int j=0; j<3; ++j)
m_trianglesAroundVertex[ m_triangle[i][j] ].push_back( i );
}
}
void TriangleSetTopologyContainer::clear()
{
clearTrianglesAroundVertex();
clearTrianglesAroundEdge();
clearEdgesInTriangle();
clearTriangles();
clearBorderElementLists();
EdgeSetTopologyContainer::clear();
}
void ManifoldTriangleSetTopologyContainer::createTrianglesAroundVertexArray ()
{
if(!hasTriangles()) // this method should only be called when triangles exist
{
#ifndef NDEBUG
std::cout << "Warning. [ManifoldTriangleSetTopologyContainer::createTrianglesAroundVertexArray] triangle array is empty." << std::endl;
#endif
createTriangleSetArray();
}
if(hasTrianglesAroundVertex())
{
clearTrianglesAroundVertex();
}
//Number of different elements needed for this function
const unsigned int nbrVertices = getNbPoints();
const unsigned int nbrTriangles = getNumberOfTriangles();
//Temporary objects
Triangle vertexTriangle;
unsigned int cpt;
unsigned int firstVertex;
//Temporary containers
sofa::helper::vector< std::map<unsigned int, unsigned int> > map_Triangles;
sofa::helper::vector< std::map<unsigned int, unsigned int> > map_NextVertex;
sofa::helper::vector< std::map<unsigned int, unsigned int> > map_PreviousVertex;
std::map<unsigned int, unsigned int>::iterator it1;
std::map<unsigned int, unsigned int>::iterator it2;
m_trianglesAroundVertex.resize(nbrVertices);
map_Triangles.resize(nbrVertices);
map_NextVertex.resize(nbrVertices);
map_PreviousVertex.resize(nbrVertices);
/* Creation of the differents maps: For each vertex i of each triangles:
- map_Triangles: key = vertex i+1, value = index triangle
- map_Nextvertex: key = vertex i+1, value = vertex i+2
- map_PreviousVertex: key = vertex i+2, value = vertex i+1 */
for (unsigned int triangleIndex = 0; triangleIndex < nbrTriangles; ++triangleIndex)
{
vertexTriangle = getTriangleArray()[triangleIndex];
for (unsigned int i=0; i<3; ++i)
{
map_Triangles[vertexTriangle[i]].insert(std::pair<unsigned int,unsigned int> (vertexTriangle[(i+1)%3], triangleIndex)); //multi
map_NextVertex[vertexTriangle[i]].insert(std::pair<unsigned int,unsigned int> (vertexTriangle[(i+1)%3], vertexTriangle[(i+2)%3]));
map_PreviousVertex[vertexTriangle[i]].insert(std::pair<unsigned int,unsigned int> (vertexTriangle[(i+2)%3], vertexTriangle[(i+1)%3]));
}
}
// General loop for m_trianglesAroundVertex creation
for (unsigned int vertexIndex = 0; vertexIndex < nbrVertices; ++vertexIndex)
{
it1 = map_NextVertex[vertexIndex].begin();
firstVertex = (*it1).first;
for (it1 = map_NextVertex[vertexIndex].begin(); it1 != map_NextVertex[vertexIndex].end(); ++it1)
{
it2 = map_PreviousVertex[vertexIndex].find((*it1).first);
if (it2 == map_PreviousVertex[vertexIndex].end()) //it2 didn't find the it1 correspondant element in his map, means it's a border
{
firstVertex = (*it1).first;
break;
}//else we are not on a border. we keep the initialised value for firstVertex
}
m_trianglesAroundVertex[vertexIndex].push_back(map_Triangles[vertexIndex][firstVertex]);
cpt=1;
for (unsigned int i = 1; i < map_NextVertex[vertexIndex].size(); ++i)
{
it2 = map_NextVertex[vertexIndex].find(firstVertex);
if (((*it2).first == firstVertex) && (it2 == map_NextVertex[vertexIndex].end()))
{
// Contour has been done without reaching the end of the map
break;
}
firstVertex = (*it2).second;
m_trianglesAroundVertex[vertexIndex].push_back(map_Triangles[vertexIndex][firstVertex]);
cpt++;
}
if (cpt != map_Triangles[vertexIndex].size())
{
#ifndef NDEBUG
std::cout << "Error. [ManifoldTriangleSetTopologyContainer::createEdgesAroundVertexArray] The mapping is not manifold.";
std::cout << "There is a wrong connection between triangles adjacent to the vertex: "<< vertexIndex << std::endl;
#endif
}
}
map_Triangles.clear();
map_NextVertex.clear();
map_PreviousVertex.clear();
}
