/**
* Method which simulates the game from a given node/state
*
* @param n
* @return
*/
private int defaultPolicy(Node n) {
Game currentState = n.getState().copy();
int d = 0;
while (!isStateTerminal(currentState) && d != depth) {
MOVE localCurrentDirection = null;
if (d == 0
|| currentState.isJunction(
currentState.getPacmanCurrentNodeIndex())) { // is in a junction
MOVE[] moves = currentState.getPossibleMoves(currentState.getPacmanCurrentNodeIndex());
int i = rng.nextInt(moves.length);
localCurrentDirection = moves[i];
while (moves[i] == localCurrentDirection.opposite()) {
i = rng.nextInt(moves.length);
}
localCurrentDirection = moves[i];
}
currentState.advanceGame(
localCurrentDirection,
controller.Controller.getGhostController().getMove(currentState, 0));
d++;
}
if (isStateTerminal(currentState)) {
return -1;
}
return currentState.getScore();
}
@Override
public MOVE getMove(Game g, long t) {
if (g.gameOver()) {
currentDirection = null;
} else if (!moved) {
moved = true;
return currentDirection;
} else if (!g.isJunction(g.getPacmanCurrentNodeIndex()) && currentDirection != null) {
ArrayList<MOVE> moves =
new ArrayList<MOVE>(Arrays.asList(g.getPossibleMoves(g.getPacmanCurrentNodeIndex())));
// MOVE[]g.getPossibleMoves(pacmanNode)
if (moves.contains(currentDirection)) {
return currentDirection;
} else {
moves.remove(currentDirection.opposite());
currentDirection = moves.get(0);
return moves.get(0);
}
}
if (0 < t) {
return run(g, t);
} else {
// TESTING
MOVE m = run(g);
return m;
//
// return run(g);
}
}
@Override
public MOVE getMove(Game game, long timeDue) {
int current = game.getPacmanCurrentNodeIndex();
// Strategy 1: if any non-edible ghost is too close (less than MIN_DISTANCE), run away
for (GHOST ghost : GHOST.values())
if (game.getGhostEdibleTime(ghost) == 0 && game.getGhostLairTime(ghost) == 0)
if (game.getShortestPathDistance(current, game.getGhostCurrentNodeIndex(ghost))
< MIN_DISTANCE)
return game.getNextMoveAwayFromTarget(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(ghost), DM.PATH);
// Strategy 2: find the nearest edible ghost and go after them
int minDistance = Integer.MAX_VALUE;
GHOST minGhost = null;
for (GHOST ghost : GHOST.values())
if (game.getGhostEdibleTime(ghost) > 0) {
int distance = game.getShortestPathDistance(current, game.getGhostCurrentNodeIndex(ghost));
if (distance < minDistance) {
minDistance = distance;
minGhost = ghost;
}
}
if (minGhost != null) // we found an edible ghost
return game.getNextMoveTowardsTarget(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(minGhost), DM.PATH);
// Strategy 3: go after the pills and power pills
int[] pills = game.getPillIndices();
int[] powerPills = game.getPowerPillIndices();
ArrayList<Integer> targets = new ArrayList<Integer>();
for (int i = 0; i < pills.length; i++) // check which pills are available
if (game.isPillStillAvailable(i)) targets.add(pills[i]);
for (int i = 0; i < powerPills.length; i++) // check with power pills are available
if (game.isPowerPillStillAvailable(i)) targets.add(powerPills[i]);
int[] targetsArray = new int[targets.size()]; // convert from ArrayList to array
for (int i = 0; i < targetsArray.length; i++) targetsArray[i] = targets.get(i);
// return the next direction once the closest target has been identified
return game.getNextMoveTowardsTarget(
current, game.getClosestNodeIndexFromNodeIndex(current, targetsArray, DM.PATH), DM.PATH);
}
/* (non-Javadoc)
* @see pacman.controllers.Controller#getMove(pacman.game.Game, long)
*/
public EnumMap<GHOST, MOVE> getMove(Game game, long timeDue) {
int pacmanIndex = game.getPacmanCurrentNodeIndex();
for (GHOST ghost : GHOST.values()) {
if (game.doesGhostRequireAction(ghost)) {
int currentIndex = game.getGhostCurrentNodeIndex(ghost);
// if ghosts are all in close proximity and not near Ms Pac-Man, disperse
if (isCrowded(game) && !closeToMsPacMan(game, currentIndex))
myMoves.put(ghost, getRetreatActions(game, ghost)); // go towards the power pill locations
// if edible or Ms Pac-Man is close to power pill, move away from Ms Pac-Man
else if (game.getGhostEdibleTime(ghost) > 0 || closeToPower(game))
myMoves.put(
ghost,
game.getApproximateNextMoveAwayFromTarget(
currentIndex,
pacmanIndex,
game.getGhostLastMoveMade(ghost),
DM.PATH)); // move away from ms pacman
// else go towards Ms Pac-Man
else
myMoves.put(
ghost,
game.getApproximateNextMoveTowardsTarget(
currentIndex,
pacmanIndex,
game.getGhostLastMoveMade(ghost),
DM.PATH)); // go towards ms pacman
}
}
return myMoves;
}
/**
* Changes the state. Checks if there is active power pills nearby, if true go eat. Checks if
* there still is a ghost close, if true stay in state Defaults to eat pill state
*
* @return returns change state. Returns null if it remains in this state
*/
public State changeState(Game game, long timeDue) {
int pacmanPos = game.getPacmanCurrentNodeIndex();
// Check for power pill
int closestPowerPill = 0;
int closestDistPowerPill = -1;
if (game.getNumberOfActivePowerPills() > 0) {
for (int i : game.getActivePowerPillsIndices()) {
int temp = game.getShortestPathDistance(pacmanPos, i);
if (closestDistPowerPill > temp || closestDistPowerPill == -1) {
closestPowerPill = i;
closestDistPowerPill = temp;
}
}
}
if (game.getNumberOfActivePowerPills() > 0
&& game.getShortestPathDistance(pacmanPos, closestPowerPill) < mach.DistToPowerPill) {
// System.out.println("(RunFromGhost)Try power pill");
return (State) mach.dataStruc.get("moveNearestPowerPill");
}
// Check for ghost distance
for (GHOST ghost : GHOST.values()) {
if (game.getGhostLairTime(ghost) > 0 || game.isGhostEdible(ghost)) {
continue;
}
if (game.getShortestPathDistance(pacmanPos, game.getGhostCurrentNodeIndex(ghost))
< mach.DistFromNonEdible) {
mach.dataStruc.put("ghost", ghost);
return null;
}
}
// System.out.println("(RunFromGhost) Try nearest pill");
return (State) mach.dataStruc.get("moveNearestPill");
}
/** runs from current ghost */
@Override
public MOVE run(Game game, long timeDue) {
return game.getNextMoveAwayFromTarget(
game.getPacmanCurrentNodeIndex(),
game.getGhostCurrentNodeIndex((GHOST) mach.dataStruc.get("ghost")),
DM.PATH);
}
private double averageGhostDistance(Game state) {
double sumDistance = 0;
for (Constants.GHOST g : Constants.GHOST.values()) {
double d =
state.getManhattanDistance(
state.getPacmanCurrentNodeIndex(), state.getGhostCurrentNodeIndex(g));
sumDistance += d;
}
return (sumDistance / Constants.GHOST.values().length);
}
/**
* Close to power.
*
* @param game the game
* @return true, if successful
*/
private boolean closeToPower(Game game) {
int pacmanIndex = game.getPacmanCurrentNodeIndex();
int[] powerPillIndices = game.getActivePowerPillsIndices();
for (int i = 0; i < powerPillIndices.length; i++)
if (game.getShortestPathDistance(powerPillIndices[i], pacmanIndex) < PILL_PROXIMITY)
return true;
return false;
}
/**
* Gets the retreat actions.
*
* @param game the game
* @param ghost the ghost
* @return the retreat actions
*/
private MOVE getRetreatActions(Game game, GHOST ghost) {
int currentIndex = game.getGhostCurrentNodeIndex(ghost);
int pacManIndex = game.getPacmanCurrentNodeIndex();
if (game.getGhostEdibleTime(ghost) == 0
&& game.getShortestPathDistance(currentIndex, pacManIndex) < PACMAN_DISTANCE)
return game.getApproximateNextMoveTowardsTarget(
currentIndex, pacManIndex, game.getGhostLastMoveMade(ghost), DM.PATH);
else
return game.getApproximateNextMoveTowardsTarget(
currentIndex,
game.getPowerPillIndices()[cornerAllocation.get(ghost)],
game.getGhostLastMoveMade(ghost),
DM.PATH);
}
/* (non-Javadoc)
* @see pacman.controllers.Controller#getMove(pacman.game.Game, long)
*/
public EnumMap<GHOST, MOVE> getMove(Game game, long timeDue) {
myMoves.clear();
int targetNode = game.getPacmanCurrentNodeIndex();
if (game.doesGhostRequireAction(GHOST.BLINKY))
myMoves.put(
GHOST.BLINKY,
game.getApproximateNextMoveTowardsTarget(
game.getGhostCurrentNodeIndex(GHOST.BLINKY),
targetNode,
game.getGhostLastMoveMade(GHOST.BLINKY),
DM.PATH));
if (game.doesGhostRequireAction(GHOST.INKY))
myMoves.put(
GHOST.INKY,
game.getApproximateNextMoveTowardsTarget(
game.getGhostCurrentNodeIndex(GHOST.INKY),
targetNode,
game.getGhostLastMoveMade(GHOST.INKY),
DM.MANHATTAN));
if (game.doesGhostRequireAction(GHOST.PINKY))
myMoves.put(
GHOST.PINKY,
game.getApproximateNextMoveTowardsTarget(
game.getGhostCurrentNodeIndex(GHOST.PINKY),
targetNode,
game.getGhostLastMoveMade(GHOST.PINKY),
DM.EUCLID));
if (game.doesGhostRequireAction(GHOST.SUE))
myMoves.put(GHOST.SUE, moves[rnd.nextInt(moves.length)]);
return myMoves;
}
public DataTuple(Game game, MOVE move) {
if (move == MOVE.NEUTRAL) {
move = game.getPacmanLastMoveMade();
}
this.DirectionChosen = move;
this.mazeIndex = game.getMazeIndex();
this.currentLevel = game.getCurrentLevel();
this.pacmanPosition = game.getPacmanCurrentNodeIndex();
this.pacmanLivesLeft = game.getPacmanNumberOfLivesRemaining();
this.currentScore = game.getScore();
this.totalGameTime = game.getTotalTime();
this.currentLevelTime = game.getCurrentLevelTime();
this.numOfPillsLeft = game.getNumberOfActivePills();
this.numOfPowerPillsLeft = game.getNumberOfActivePowerPills();
if (game.getGhostLairTime(GHOST.BLINKY) == 0) {
this.isBlinkyEdible = game.isGhostEdible(GHOST.BLINKY);
this.blinkyDist =
game.getShortestPathDistance(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.BLINKY));
}
if (game.getGhostLairTime(GHOST.INKY) == 0) {
this.isInkyEdible = game.isGhostEdible(GHOST.INKY);
this.inkyDist =
game.getShortestPathDistance(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.INKY));
}
if (game.getGhostLairTime(GHOST.PINKY) == 0) {
this.isPinkyEdible = game.isGhostEdible(GHOST.PINKY);
this.pinkyDist =
game.getShortestPathDistance(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.PINKY));
}
if (game.getGhostLairTime(GHOST.SUE) == 0) {
this.isSueEdible = game.isGhostEdible(GHOST.SUE);
this.sueDist =
game.getShortestPathDistance(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.SUE));
}
this.blinkyDir =
game.getNextMoveTowardsTarget(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.BLINKY), DM.PATH);
this.inkyDir =
game.getNextMoveTowardsTarget(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.INKY), DM.PATH);
this.pinkyDir =
game.getNextMoveTowardsTarget(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.PINKY), DM.PATH);
this.sueDir =
game.getNextMoveTowardsTarget(
game.getPacmanCurrentNodeIndex(), game.getGhostCurrentNodeIndex(GHOST.SUE), DM.PATH);
this.numberOfNodesInLevel = game.getNumberOfNodes();
this.numberOfTotalPillsInLevel = game.getNumberOfPills();
this.numberOfTotalPowerPillsInLevel = game.getNumberOfPowerPills();
}
public Constants.MOVE kNN(Game game, int k, long timeDue) {
Constants.MOVE bestMove = myMove;
int current = game.getPacmanCurrentNodeIndex();
double averageDistance = averageGhostDistance(game);
int positionBottom = kNNSearch(0, historicalData.size(), averageDistance);
int positionTop = positionBottom + 1;
k--;
int totalCount = k / 2;
while (totalCount > 0 && k > 0) {
if (positionBottom > 0) {
if (historicalData.get(positionBottom).moveAway) {
totalCount--;
}
positionBottom--;
k--;
if (k <= 0) break;
}
if (positionTop < historicalData.size()) {
if (historicalData.get(positionTop).moveAway) {
totalCount--;
}
positionTop++;
k--;
}
}
Constants.MOVE[] next = game.getPossibleMoves(current);
if (totalCount > 0) {
double closestAway = Double.POSITIVE_INFINITY;
for (int index : game.getActivePillsIndices()) {
double distanceAway = game.getShortestPathDistance(game.getPacmanCurrentNodeIndex(), index);
if (distanceAway < closestAway) closestAway = distanceAway;
}
for (Constants.MOVE eachMove : next) {
Game newState = game.copy();
newState.advanceGame(eachMove, new AggressiveGhosts().getMove());
// if near to pill good;
double nextClosestAway = Double.POSITIVE_INFINITY;
for (int index : newState.getActivePillsIndices()) {
double distanceAway =
newState.getShortestPathDistance(newState.getPacmanCurrentNodeIndex(), index);
if (distanceAway < closestAway) nextClosestAway = distanceAway;
}
if (nextClosestAway <= closestAway) bestMove = eachMove;
}
} else {
for (Constants.MOVE eachMove : next) {
Game newState = game.copy();
newState.advanceGame(eachMove, new AggressiveGhosts().getMove());
if (averageGhostDistance(newState) < averageDistance) {
bestMove = eachMove;
}
}
}
lastMove = bestMove;
return bestMove;
}
/**
* Close to ms pac man.
*
* @param game the game
* @param location the location
* @return true, if successful
*/
private boolean closeToMsPacMan(Game game, int location) {
if (game.getShortestPathDistance(game.getPacmanCurrentNodeIndex(), location) < PACMAN_DISTANCE)
return true;
return false;
}
