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);
}
}
