/**
* Extract the major roads from the road network
*
* @return a connected network of major roads
*/
public Network extractMajorRoads() {
Network majorRoads = new Network();
// go through all nodes
for (Object o : roads.getAllNodes()) {
GeoNode n = (GeoNode) o;
// go through all edges
for (Object p : roads.getEdgesOut(n)) {
sim.field.network.Edge e = (sim.field.network.Edge) p;
// String type = ((MasonGeometry)e.info).getStringAttribute("class");
// save major roads
// if(type.equals("major"))
majorRoads.addEdge(e.from(), e.to(), e.info);
}
}
// merge the major roads into a connected component
NetworkUtilities.attachUnconnectedComponents(majorRoads, roads);
return majorRoads;
}
/**
* Make sure the network doesn't have any problems
*
* @param n - the network to be tested
*/
static void testNetworkForIssues(Network n) {
System.out.println("testing");
for (Object o : n.allNodes) {
GeoNode node = (GeoNode) o;
for (Object p : n.getEdgesOut(node)) {
sim.field.network.Edge e = (sim.field.network.Edge) p;
LineString ls = (LineString) ((MasonGeometry) e.info).geometry;
Coordinate c1 = ls.getCoordinateN(0);
Coordinate c2 = ls.getCoordinateN(ls.getNumPoints() - 1);
GeoNode g1 = (GeoNode) e.getFrom();
GeoNode g2 = (GeoNode) e.getTo();
if (c1.distance(g1.geometry.getCoordinate()) > 1) System.out.println("found you");
if (c2.distance(g2.geometry.getCoordinate()) > 1) System.out.println("found you");
}
}
}
/**
* Connect the GeoNode to the given subnetwork using the complete road network
*
* @param n - the target node
* @param subNetwork - the existing subnetwork
*/
void connectToMajorNetwork(GeoNode n, Network subNetwork) {
try {
Bag subNetNodes;
subNetNodes = (Bag) subNetwork.allNodes.clone();
// find a path using the whole set of roads in the environment
AStar pathfinder = new AStar();
ArrayList<Edge> edges = pathfinder.astarPath(n, new ArrayList<GeoNode>(subNetNodes), roads);
if (edges == null) return; // maybe no such path exists!
// otherwise, add the edges into the subnetwork
for (Edge e : edges) {
GeoNode a = (GeoNode) e.getFrom(), b = (GeoNode) e.getTo();
if (!subNetwork.nodeExists(a) || !subNetwork.nodeExists(b))
subNetwork.addEdge(a, b, e.info);
}
} catch (CloneNotSupportedException e1) {
e1.printStackTrace();
}
}