void Scene::removeEdge(PlugEdge* edge)
{
Plug* fromPlug = edge->getStartPlug();
Plug* toPlug = edge->getEndPlug();
QPair<Plug*, Plug*> edgeKey(fromPlug, toPlug);
#ifdef QT_DEBUG
Q_ASSERT(m_edges.contains(edgeKey));
#else
if(!m_edges.contains(edgeKey)){
return;
}
#endif
// unregister from the connected plugs
fromPlug->removeEdge(edge);
toPlug->removeEdge(edge);
// remove the edge from the Scene's register
m_edges.remove(edgeKey);
// remove the edge from its group
EdgeGroup* edgeGroup = edge->getGroup();
edgeGroup->removeEdge(edge);
// if the group is now empty, we can only delete it if the other group in the pair is also empty
EdgeGroupPair* edgeGroupPair = edgeGroup->getEdgeGroupPair();
if(edgeGroupPair->isEmpty()){
uint firstHash = edgeGroupPair->getFirstGroup()->getHash();
uint secondHash = edgeGroupPair->getSecondGroup()->getHash();
Q_ASSERT(m_edgeGroups.contains(firstHash));
Q_ASSERT(m_edgeGroups.contains(secondHash));
m_edgeGroups.remove(firstHash);
m_edgeGroups.remove(secondHash);
m_edgeGroupPairs.remove(edgeGroupPair);
delete edgeGroupPair; // also deletes the EdgeGroups
edgeGroupPair = nullptr;
}
// lastly, remove the QGraphicsItem from the scene, thereby taking possession of the last pointer to the edge
removeItem(edge);
// delete the edge from memory (automatically deletes all Qt-children as well)
edge->deleteLater();
// emit signals
emit fromPlug->getNode()->outputDisconnected(fromPlug, toPlug);
emit toPlug->getNode()->inputDisconnected(toPlug, fromPlug);
}
void Geometry::addEdge(Table<EdgeHash,int>& edgeTable, std::vector<Edge>& edgeVector, int v0, int v1, int face)
{
EdgeHash edgeKey( v0, v1, _vertices );
if( edgeTable.containsKey(edgeKey) )
{
// if this is the second face referencing this edge
int edgeIndex = edgeTable[edgeKey];
Edge& existingEdge = edgeVector[edgeIndex];
// make sure the vertices are wound correctly
// (ie in opposite directions for the two different faces)
assert( fuzzyEq( _vertices + existingEdge.vertexId[0], _vertices + v1 ) );
assert( fuzzyEq( _vertices + existingEdge.vertexId[1], _vertices + v0 ) );
// make sure this is only the second face to reference this edge
assert( existingEdge.triangleId[0] >= 0 );
assert( existingEdge.triangleId[0] != face );
assert( existingEdge.triangleId[1] == -1 );
// set second face
existingEdge.triangleId[1] = face;
}
else
{
// if this is the first face referencing this edge
Edge newEdge;
newEdge.vertexId[0] = v0;
newEdge.vertexId[1] = v1;
newEdge.triangleId[0] = face;
newEdge.triangleId[1] = -1;
// add edge to lookup table and array
edgeTable.set( edgeKey, edgeVector.size() );
edgeVector.push_back(newEdge);
}
}
PlugEdge* Scene::getEdge(Plug* fromPlug, Plug* toPlug)
{
QPair<Plug*, Plug*> edgeKey(fromPlug, toPlug);
return m_edges.value(edgeKey, nullptr);
}
