public int toDOT(FileWriter fr, boolean redColored, int i) throws IOException {
String red, format, val, blue;
int me = i, aux;
if (redColored) {
red = "color=red, style=filled, ";
} else {
red = "";
}
if (value == Integer.MAX_VALUE || value == Integer.MIN_VALUE) {
val = "";
blue = "color=blue, style=filled, ";
} else {
val = "" + value;
blue = "";
}
format = getDOTFormat();
fr.append(me + " [" + red + blue + format + "label=\"" + pos.toString() + " " + val + "\"];\n");
boolean redSon, selected = true;
for (Node son : childs) {
if (selected && son.value == value) {
selected = false;
redSon = true;
} else {
redSon = false;
}
aux = i + 1;
i = son.toDOT(fr, redSon, ++i);
fr.append(me + " -> " + aux + ";\n");
}
return i;
}
public void genMaze() {
Node current =
nodes[(int) (Math.random() * (MazeSize - 1))][(int) (Math.random() * (MazeSize - 1))];
while (visited.size() < MazeSize * MazeSize) {
if (!visited.contains(current)) {
current.setVisited(true);
visited.add(current);
nodeStack.push(current);
while (!nodeStack.isEmpty()) {
traverse(nodes);
}
}
}
}
public Node[][] traverse(Node[][] nodes) {
if (!nodeStack.empty()) {
Node current = nodeStack.pop();
current = initiateNeighbors(current);
current.setVisited(true);
visited.add(current);
double randProb = Math.random();
if (randProb <= 0.2d) {
current.setBlocked(true);
}
ArrayList<Node> neighbors = current.getNeighbors();
for (Node nbr : neighbors) {
if (!visited.contains(nbr)) {
nodeStack.push(nbr);
}
}
}
return nodes;
}
public Position nextMove(
int maxLevel, long level, boolean prune, Integer parentVal, TimeInfo timeInfo) {
if (timeInfo != null) {
timeInfo.update();
}
if (maxLevel == level) {
getHeuristicalValue();
return pos;
}
Position nextPos = pos;
setChilds();
level++;
for (Node child : childs) {
if (prune && pruneBranch(parentVal)) {
return null;
}
if (child.chooseMove(value)) {
child.nextMove(maxLevel, level, prune, value, timeInfo);
nextPos = child.pos;
value = child.value;
}
}
return nextPos;
}
public Node initiateNeighbors(Node n) {
ArrayList<Node> nbrs = new ArrayList<Node>();
ArrayList<Node> temp = new ArrayList<Node>();
if (n.getY() < Maze.MazeSize - 1) nbrs.add(nodes[n.getX()][n.getY() + 1]);
if (n.getY() > 0) nbrs.add(nodes[n.getX()][n.getY() - 1]);
if (n.getX() > 0) nbrs.add(nodes[n.getX() - 1][n.getY()]);
if (n.getX() < Maze.MazeSize - 1) nbrs.add(nodes[n.getX() + 1][n.getY()]);
n.setNeighbors(nbrs);
return n;
}