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;
}
@Override
protected void processEdge(Edge edge, Node source) {
if (MapSequence.fromMap(getDfsState()).get(edge.getOpposite(source)) == Dfs.BEFORE) {
myOuterFace.addLast(new Dart(edge, source));
} else {
SetSequence.fromSet(myBackEdges).addElement(edge);
}
}
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));
}
}
public static void getRepresentation(
EmbeddedGraph embeddedGraph,
Set<Edge> edgesToBeStraight,
Map<Dart, Integer> bends,
Map<Dart, Integer> angles) {
Graph graph = embeddedGraph.getGraph();
Graph network = new Graph();
Node center = network.createNode();
Map<Edge, Integer> low = MapSequence.fromMap(new HashMap<Edge, Integer>());
Map<Edge, Integer> capacity = MapSequence.fromMap(new HashMap<Edge, Integer>());
Map<Edge, Integer> cost = MapSequence.fromMap(new HashMap<Edge, Integer>());
Map<Node, Node> nodeMap = MapSequence.fromMap(new HashMap<Node, Node>());
for (Node node : ListSequence.fromList(graph.getNodes())) {
Node networkNode = network.createNode();
MapSequence.fromMap(nodeMap).put(node, networkNode);
Edge edge = network.connect(center, networkNode);
MapSequence.fromMap(low).put(edge, 4);
MapSequence.fromMap(capacity).put(edge, MapSequence.fromMap(low).get(edge));
MapSequence.fromMap(cost).put(edge, 0);
}
Map<Face, Node> faceMap = MapSequence.fromMap(new HashMap<Face, Node>());
for (Face face : ListSequence.fromList(embeddedGraph.getFaces())) {
Node node = network.createNode();
MapSequence.fromMap(faceMap).put(face, node);
Edge edge = network.connect(node, center);
if (embeddedGraph.isOuterFace(face)) {
MapSequence.fromMap(low).put(edge, 2 * ListSequence.fromList(face.getDarts()).count() + 4);
} else {
MapSequence.fromMap(low).put(edge, 2 * ListSequence.fromList(face.getDarts()).count() - 4);
}
MapSequence.fromMap(capacity).put(edge, MapSequence.fromMap(low).get(edge));
MapSequence.fromMap(cost).put(edge, 0);
}
Map<Dart, Edge> dartBendMap = MapSequence.fromMap(new HashMap<Dart, Edge>());
Map<Dart, Edge> dartAngleMap = MapSequence.fromMap(new HashMap<Dart, Edge>());
for (Face face : ListSequence.fromList(embeddedGraph.getFaces())) {
Node faceNode = MapSequence.fromMap(faceMap).get(face);
for (Dart dart : ListSequence.fromList(face.getDarts())) {
Edge edge = network.connect(MapSequence.fromMap(nodeMap).get(dart.getSource()), faceNode);
MapSequence.fromMap(dartAngleMap).put(dart, edge);
MapSequence.fromMap(low).put(edge, 1);
MapSequence.fromMap(capacity).put(edge, 4);
MapSequence.fromMap(cost).put(edge, 0);
List<Face> faces = embeddedGraph.getAdjacentFaces(dart.getEdge());
Node oppositeFaceNode;
if (ListSequence.fromList(faces).getElement(0) == face) {
oppositeFaceNode =
MapSequence.fromMap(faceMap).get(ListSequence.fromList(faces).getElement(1));
} else {
oppositeFaceNode =
MapSequence.fromMap(faceMap).get(ListSequence.fromList(faces).getElement(0));
}
edge = network.connect(faceNode, oppositeFaceNode);
MapSequence.fromMap(dartBendMap).put(dart, edge);
MapSequence.fromMap(low).put(edge, 0);
if (SetSequence.fromSet(edgesToBeStraight).contains(dart.getEdge())) {
MapSequence.fromMap(capacity).put(edge, 0);
} else {
MapSequence.fromMap(capacity).put(edge, Integer.MAX_VALUE / 2);
}
MapSequence.fromMap(cost).put(edge, 1);
}
}
if (SHOW_INFO > 0) {
System.out.println("Constructed network:");
for (Node node : ListSequence.fromList(graph.getNodes())) {
System.out.println("for node " + node + ": " + MapSequence.fromMap(nodeMap).get(node));
}
for (Face face : ListSequence.fromList(embeddedGraph.getFaces())) {
System.out.println("for face " + face + ": " + MapSequence.fromMap(faceMap).get(face));
}
for (Edge edge : ListSequence.fromList(network.getEdges())) {
System.out.println(
"edge "
+ edge
+ ": low = "
+ MapSequence.fromMap(low).get(edge)
+ ", cap = "
+ MapSequence.fromMap(capacity).get(edge)
+ ", cost = "
+ MapSequence.fromMap(cost).get(edge));
}
}
Map<Edge, Integer> circulation =
MinCostCirculation.getCirculation(network, low, capacity, cost);
for (Dart dart : SetSequence.fromSet(MapSequence.fromMap(dartBendMap).keySet())) {
MapSequence.fromMap(bends)
.put(
dart,
MapSequence.fromMap(circulation).get(MapSequence.fromMap(dartBendMap).get(dart)));
MapSequence.fromMap(angles)
.put(
dart,
MapSequence.fromMap(circulation).get(MapSequence.fromMap(dartAngleMap).get(dart)));
}
if (SHOW_INFO > 0) {
System.out.println("bends: " + bends);
System.out.println("angles: " + angles);
}
}
@Override
protected void postprocess(Node node, Edge from) {
if (from != null) {
myOuterFace.addLast(new Dart(from, node));
}
}