/** Returns a (random) coordinate that is between two adjacent MapNodes */
@Override
public Coord getInitialLocation(boolean translate) {
List<MapNode> nodes = map.getNodes();
MapNode n, n2;
Coord n2Location, nLocation, placement;
double dx, dy;
double rnd = rng.nextDouble();
// choose a random node (from OK types if such are defined)
do {
n = nodes.get(rng.nextInt(nodes.size()));
} while (okMapNodeTypes != null && !n.isType(okMapNodeTypes));
// choose a random neighbor of the selected node
n2 = n.getNeighbors().get(rng.nextInt(n.getNeighbors().size()));
nLocation = n.getLocation();
n2Location = n2.getLocation();
placement = n.getLocation().clone();
dx = rnd * (n2Location.getX() - nLocation.getX());
dy = rnd * (n2Location.getY() - nLocation.getY());
if (translate == false) {
dx = 0;
dy = 0;
}
placement.translate(dx, dy); // move coord from n towards n2
this.lastMapNode = n;
return placement;
}
/**
* Selects and returns a random node that is OK from a list of nodes. Whether node is OK, is
* determined by the okMapNodeTypes list. If okMapNodeTypes are defined, the given list
* <strong>must</strong> contain at least one OK node to prevent infinite looping.
*
* @param nodes The list of nodes to choose from.
* @return A random node from the list (that is OK if ok list is defined)
*/
protected MapNode selectRandomOkNode(List<MapNode> nodes) {
MapNode n;
do {
n = nodes.get(rng.nextInt(nodes.size()));
} while (okMapNodeTypes != null && !n.isType(okMapNodeTypes));
return n;
}
