/*
* Find and mark L edges which are "covered" by the result area (if any).
* L edges at nodes which also have A edges can be checked by checking
* their depth at that node.
* L edges at nodes which do not have A edges can be checked by doing a
* point-in-polygon test with the previously computed result areas.
*/
void
LineBuilder::findCoveredLineEdges()
{
// first set covered for all L edges at nodes which have A edges too
map<Coordinate*, Node*, CoordinateLessThen>& nodeMap = op->getGraph().getNodeMap()->nodeMap;
map<Coordinate*, Node*, CoordinateLessThen>::iterator it = nodeMap.begin();
map<Coordinate*, Node*, CoordinateLessThen>::iterator endIt = nodeMap.end();
for(; it != endIt; ++it) {
Node* node = it->second;
//node.print(System.out);
assert(dynamic_cast<DirectedEdgeStar*>(node->getEdges()));
DirectedEdgeStar* des = static_cast<DirectedEdgeStar*>(node->getEdges());
des->findCoveredLineEdges();
//((DirectedEdgeStar*)node->getEdges())->findCoveredLineEdges();
}
/*
* For all L edges which weren't handled by the above,
* use a point-in-poly test to determine whether they are covered
*/
vector<EdgeEnd*>* ee = op->getGraph().getEdgeEnds();
for(size_t i = 0, s = ee->size(); i < s; ++i) {
assert(dynamic_cast<DirectedEdge*>((*ee)[i]));
DirectedEdge* de = static_cast<DirectedEdge*>((*ee)[i]);
Edge* e = de->getEdge();
if(de->isLineEdge() && !e->isCoveredSet()) {
bool isCovered = op->isCoveredByA(de->getCoordinate());
e->setCovered(isCovered);
}
}
}
/*
* Removes a node from the graph, along with any associated
* DirectedEdges and Edges.
*/
void
PlanarGraph::remove(Node *node)
{
// unhook all directed edges
vector<DirectedEdge*> &outEdges=node->getOutEdges()->getEdges();
for(unsigned int i=0; i<outEdges.size(); ++i) {
DirectedEdge *de =outEdges[i];
DirectedEdge *sym = de->getSym();
// remove the diredge that points to this node
if (sym!=NULL) remove(sym);
// remove this diredge from the graph collection
for(unsigned int j=0; j<dirEdges.size(); ++j) {
if (dirEdges[j]==de) {
dirEdges.erase(dirEdges.begin()+j);
--j;
}
}
Edge *edge=de->getEdge();
if (edge!=NULL) {
for(unsigned int k=0; k<edges.size(); ++k) {
if(edges[k]==edge) {
edges.erase(edges.begin()+k);
--k;
}
}
}
}
// remove the node from the graph
nodeMap.remove(node->getCoordinate());
//nodes.remove(node);
}
void WeightedDigraph::addEdge(const DirectedEdge &e)
{
if(e.from() >= V() || e.to() >= V())
return;
++edgeCount;
array[e.from()].push(e);
}
std::deque<DirectedEdge> *Djikstra::pathTo(int v){
if(!hasPathTo(v))
return 0;
std::deque<DirectedEdge> *path = new std::deque<DirectedEdge>();
for(DirectedEdge e = edgeTo[v]; e.from() || e.to() || e.Getweight(); e =edgeTo[e.from()])
path->push_front(e);
return path;
}
void EdgeWeightDigraph::addEdge(const DirectedEdge &e)
{
if (e.from() >= getArrSize())
return;
arr[e.from()].push_back(e);
this->edge++; // 边的个数加1
}
/*
* Removes DirectedEdge from its from-Node and from this PlanarGraph. Note:
* This method does not remove the Nodes associated with the DirectedEdge,
* even if the removal of the DirectedEdge reduces the degree of a Node to
* zero.
*/
void
PlanarGraph::remove(DirectedEdge *de)
{
DirectedEdge *sym = de->getSym();
if (sym!=NULL) sym->setSym(NULL);
de->getFromNode()->getOutEdges()->remove(de);
for(unsigned int i=0; i<dirEdges.size(); ++i) {
if(dirEdges[i]==de) {
dirEdges.erase(dirEdges.begin()+i);
--i;
}
}
}
/*public*/
bool
Node::isIncidentEdgeInResult() const
{
testInvariant();
if (!edges) return false;
EdgeEndStar::iterator it=edges->begin();
EdgeEndStar::iterator endIt=edges->end();
for ( ; it!=endIt; ++it)
{
assert(*it);
assert(dynamic_cast<DirectedEdge *>(*it));
DirectedEdge *de = static_cast<DirectedEdge *>(*it);
if ( de->getEdge()->isInResult() ) return true;
}
return false;
}
std::deque<DirectedEdge> *BellmanFord::pathTo(int v){
if(!hasPathTo(v))
return 0;
std::deque<DirectedEdge> *path = new std::deque<DirectedEdge>();
for(DirectedEdge e = edgeTo[v];e.from() || e.to() || e.Getweight(); e=edgeTo[e.from()] ){
int w = e.from();
w++;w--;
path->push_front(e);
}
return path;
}