void Foam::CV2D::fast_restore_Delaunay(Vertex_handle vh)
{
int i;
Face_handle f = vh->face(), next, start(f);
do
{
i=f->index(vh);
if (!is_infinite(f))
{
if (!internal_flip(f, cw(i))) external_flip(f, i);
if (f->neighbor(i) == start) start = f;
}
f = f->neighbor(cw(i));
} while (f != start);
}
void findOutsideSegment( Triangulation &t, Face_handle fh, int currentSegment, int commingFromIndex, int &outsideSegment )
{
// if the face is an infinite face
// then we know the outside segment which is the
// current segment
if( t.is_infinite(fh) )
{
if( (outsideSegment != -1)&&(outsideSegment != currentSegment) )
printf( "error : different outsideSegments detected during triangulation (edgeloop not closed?)\n" );
outsideSegment = currentSegment;
return;
}
// if there is already a segment identifier, then we know that
// the face has already been visited
if( fh->info() != -1 )
return;
fh->info() = currentSegment;
for( int i=0; i<3; ++i )
{
// get edge associated with the index i
std::pair<Face_handle, int> edge = std::make_pair( fh, i );
if( i == commingFromIndex )
continue;
// if the edge is a constrained edge, then we know this is the border
if(t.is_constrained(edge))
{
//...and we have to pass a madified currentSegment value
findOutsideSegment( t, fh->neighbor(i), (currentSegment+1)%2, t.mirror_index( fh, i), outsideSegment );
}else
//...else we recurse and leave the currentSegment value untouched
findOutsideSegment( t, fh->neighbor(i), currentSegment, t.mirror_index( fh, i), outsideSegment );
}
}
void Foam::CV2D::external_flip(Face_handle& f, int i)
{
Face_handle n = f->neighbor(i);
if
(
CGAL::ON_POSITIVE_SIDE
!= side_of_oriented_circle(n, f->vertex(i)->point())
) return;
flip(f, i);
i = n->index(f->vertex(i));
external_flip(n, i);
}
bool recurse(Face_handle current_face, long d, vector<Face_handle>& visited, Triangulation t) {
// Remember we visited this node
visited.push_back(current_face);
cout << "Recursion at: " << t.dual(current_face) << endl;
// Base of recursion: check if we are free
if(t.is_infinite(current_face)) {
cout << "Infinite face!" << endl;
return true;
}
for(int neighbor_num=0; neighbor_num<3; neighbor_num++) {
Face_handle neighbor_face = current_face->neighbor(neighbor_num);
//cout << (current_face == neighbor_face) << endl;
cout << "\tChecking neighbor of vertex " << current_face->vertex(neighbor_num)->point() << endl;
cout << "\tPoints: ";
for(int j=0; j<3; j++) {
cout << neighbor_face->vertex(j)->point() << ", ";
}
cout << endl;
// If we already visited
if(find(visited.begin(), visited.end(), current_face) != visited.end()) {
continue;
}
Vertex_handle border_endpoint1 = current_face->vertex((neighbor_num + 1) % 3);
Vertex_handle border_endpoint2 = current_face->vertex((neighbor_num + 2) % 3);
K::FT border_length_sq = CGAL::squared_distance(border_endpoint1->point(), border_endpoint2->point());
if(CGAL::to_double(border_length_sq) >= 4 * d) { // If we can fit through that edge
// cout << "can fit through edge " << neighbor_num << endl;
// New search starting from neighbor
if(recurse(neighbor_face, d, visited, t)) {
return true;
}
} else {
cout << "cannot fit through edge :S" << endl;
}
}
return false;
}
bool Foam::CV2D::internal_flip(Face_handle& f, int i)
{
Face_handle n = f->neighbor(i);
if
(
CGAL::ON_POSITIVE_SIDE
!= side_of_oriented_circle(n, f->vertex(i)->point())
)
{
return false;
}
flip(f, i);
return true;
}
void
discoverInfiniteComponent(const CDT & ct)
{
//when this function is called, all faces are set "in_domain"
Face_handle start = ct.infinite_face();
std::list<Face_handle> queue;
queue.push_back(start);
while(! queue.empty())
{
Face_handle fh = queue.front();
queue.pop_front();
fh->set_in_domain(false);
for(int i = 0; i < 3; i++)
{
Face_handle fi = fh->neighbor(i);
if(fi->is_in_domain()
&& !ct.is_constrained(CDT::Edge(fh,i)))
queue.push_back(fi);
}
}
}
void Foam::CV2D::extractPatches
(
wordList& patchNames,
labelList& patchSizes,
EdgeMap<label>& mapEdgesRegion,
EdgeMap<label>& indirectPatchEdge
) const
{
label nPatches = qSurf_.patchNames().size() + 1;
label defaultPatchIndex = qSurf_.patchNames().size();
patchNames.setSize(nPatches);
patchSizes.setSize(nPatches, 0);
mapEdgesRegion.clear();
const wordList& existingPatches = qSurf_.patchNames();
forAll(existingPatches, sP)
{
patchNames[sP] = existingPatches[sP];
}
patchNames[defaultPatchIndex] = "CV2D_default_patch";
for
(
Triangulation::Finite_edges_iterator eit = finite_edges_begin();
eit != finite_edges_end();
++eit
)
{
Face_handle fOwner = eit->first;
Face_handle fNeighbor = fOwner->neighbor(eit->second);
Vertex_handle vA = fOwner->vertex(cw(eit->second));
Vertex_handle vB = fOwner->vertex(ccw(eit->second));
if
(
(vA->internalOrBoundaryPoint() && !vB->internalOrBoundaryPoint())
|| (vB->internalOrBoundaryPoint() && !vA->internalOrBoundaryPoint())
)
{
point ptA = toPoint3D(vA->point());
point ptB = toPoint3D(vB->point());
label patchIndex = qSurf_.findPatch(ptA, ptB);
if (patchIndex == -1)
{
patchIndex = defaultPatchIndex;
WarningInFunction
<< "Dual face found that is not on a surface "
<< "patch. Adding to CV2D_default_patch."
<< endl;
}
edge e(fOwner->faceIndex(), fNeighbor->faceIndex());
patchSizes[patchIndex]++;
mapEdgesRegion.insert(e, patchIndex);
if (!pointPair(*vA, *vB))
{
indirectPatchEdge.insert(e, 1);
}
}
}
}
