public PathNode(Pathable s, Pathable hub, PathNode parent)
{
parentNode = parent;
element = s;
H = s.getHeuristicScore(hub);
setF(parent.F + s.getMoveScore(parentNode.element));
}
public PathNode(Pathable s, Pathable hub)
{
parentNode = null;
element = s;
H = s.getHeuristicScore(hub);
}