public Node split(EmbeddedGraph embeddedGraph, Edge edge) {
Graph originalGraph = embeddedGraph.getGraph();
Node newNode = originalGraph.createDummyNode();
originalGraph.removeEdge(edge);
List<Edge> newEdges = ListSequence.fromList(new ArrayList<Edge>());
ListSequence.fromList(newEdges).addElement(originalGraph.connect(edge.getSource(), newNode));
ListSequence.fromList(newEdges).addElement(originalGraph.connect(newNode, edge.getTarget()));
MapSequence.fromMap(mySplittedEdges).put(edge, newEdges);
List<Face> facesToProcess = ListSequence.fromList(new ArrayList<Face>());
ListSequence.fromList(facesToProcess)
.addSequence(ListSequence.fromList(embeddedGraph.getAdjacentFaces(edge)));
for (Face face : ListSequence.fromList(facesToProcess)) {
List<Dart> darts = face.getDarts();
int pos = 0;
while (ListSequence.fromList(darts).getElement(pos).getEdge() != edge) {
pos++;
}
Dart dartToReplace = ListSequence.fromList(darts).getElement(pos);
for (Edge newEdge : ListSequence.fromList(newEdges)) {
if (ListSequence.fromList(newEdge.getAdjacentNodes()).contains(dartToReplace.getSource())) {
embeddedGraph.setDart(face, pos, new Dart(newEdge, dartToReplace.getSource()));
}
}
for (Edge newEdge : ListSequence.fromList(newEdges)) {
if (ListSequence.fromList(newEdge.getAdjacentNodes()).contains(dartToReplace.getTarget())) {
embeddedGraph.insertDart(face, pos + 1, new Dart(newEdge, newNode));
}
}
}
return newNode;
}
private void restoreEdge(EmbeddedGraph embeddedGraph, Edge removedEdge) {
MapSequence.fromMap(mySplittedEdges)
.put(removedEdge, ListSequence.fromList(new ArrayList<Edge>()));
Graph graph = embeddedGraph.getGraph();
DualGraph dualGraph = new DualGraph(embeddedGraph);
List<Node> newNodes = ListSequence.fromList(new ArrayList<Node>());
for (Node node : ListSequence.fromList(removedEdge.getAdjacentNodes())) {
Node newNode = dualGraph.createDummyNode();
for (Edge nodeEdge : ListSequence.fromList(node.getEdges(Edge.Direction.BOTH))) {
for (Face face : ListSequence.fromList(embeddedGraph.getAdjacentFaces(nodeEdge))) {
dualGraph.connect(newNode, MapSequence.fromMap(dualGraph.getNodesMap()).get(face));
}
}
ListSequence.fromList(newNodes).addElement(newNode);
}
List<Edge> path =
ShortestPath.getPath(
dualGraph,
ListSequence.fromList(newNodes).getElement(0),
ListSequence.fromList(newNodes).getElement(1),
Edge.Direction.BOTH);
List<Node> nodePath = ListSequence.fromList(new ArrayList<Node>());
List<Face> facePath = ListSequence.fromList(new ArrayList<Face>());
ListSequence.fromList(nodePath)
.addElement(ListSequence.fromList(removedEdge.getAdjacentNodes()).getElement(0));
Node cur = ListSequence.fromList(newNodes).getElement(0);
for (Edge edge : ListSequence.fromList(path)) {
Edge realEdge = MapSequence.fromMap(dualGraph.getEdgesMap()).get(edge);
if (embeddedGraph.getAdjacentFaces(realEdge) != null) {
ListSequence.fromList(nodePath)
.addElement(
split(embeddedGraph, MapSequence.fromMap(dualGraph.getEdgesMap()).get(edge)));
}
cur = edge.getOpposite(cur);
Face curFace = MapSequence.fromMap(dualGraph.getFacesMap()).get(cur);
if (curFace != null) {
ListSequence.fromList(facePath).addElement(curFace);
}
}
ListSequence.fromList(nodePath)
.addElement(ListSequence.fromList(removedEdge.getAdjacentNodes()).getElement(1));
for (int i = 0; i < ListSequence.fromList(nodePath).count() - 1; i++) {
Edge newEdge =
graph.connect(
ListSequence.fromList(nodePath).getElement(i),
ListSequence.fromList(nodePath).getElement(i + 1));
ListSequence.fromList(MapSequence.fromMap(mySplittedEdges).get(removedEdge))
.addElement(newEdge);
splitFace(embeddedGraph, ListSequence.fromList(facePath).getElement(i), newEdge);
}
}
public void splitFace(EmbeddedGraph embeddedGraph, Face face, Edge newEdge) {
List<Node> nodes = newEdge.getAdjacentNodes();
Graph originalGraph = embeddedGraph.getGraph();
List<Face> newFaces = ListSequence.fromList(new ArrayList<Face>());
ListSequence.fromList(newFaces).addElement(new Face(originalGraph));
ListSequence.fromList(newFaces).addElement(new Face(originalGraph));
Iterator<Dart> dartItr = ListSequence.fromList(face.getDarts()).iterator();
Dart cur;
do {
cur = dartItr.next();
} while (!(ListSequence.fromList(nodes).contains(cur.getSource())));
Dart first = cur;
Node found = cur.getSource();
Node toFind = ListSequence.fromList(nodes).getElement(0);
if (toFind == found) {
toFind = ListSequence.fromList(nodes).getElement(1);
}
do {
ListSequence.fromList(newFaces).getElement(0).addLast(cur);
cur = dartItr.next();
} while (cur.getSource() != toFind);
ListSequence.fromList(newFaces).getElement(0).addLast(new Dart(newEdge, cur.getSource()));
ListSequence.fromList(newFaces).getElement(1).addLast(new Dart(newEdge, first.getSource()));
ListSequence.fromList(newFaces).getElement(1).addLast(cur);
while (dartItr.hasNext()) {
cur = dartItr.next();
ListSequence.fromList(newFaces).getElement(1).addLast(cur);
}
dartItr = ListSequence.fromList(face.getDarts()).iterator();
cur = dartItr.next();
while (cur != first) {
ListSequence.fromList(newFaces).getElement(1).addLast(cur);
cur = dartItr.next();
}
embeddedGraph.removeFace(face);
for (Face newFace : ListSequence.fromList(newFaces)) {
embeddedGraph.addFace(newFace);
}
if (embeddedGraph.isOuterFace(face)) {
embeddedGraph.setOuterFace(ListSequence.fromList(newFaces).getElement(1));
}
}