private MapLocation traceNext(MapLocation currentLoc, Direction faceDir, boolean cw) {
// Put isTraversable first so that the second while loop will rotate the
// direction to walkable position
// Try code reuse in the future
int step = 0;
if (cw) {
while (isTraversable(currentLoc.add(faceDir)) && step < 8) {
faceDir = faceDir.rotateRight();
step++;
}
step = 0;
while (!isTraversable(currentLoc.add(faceDir)) && step < 8) {
faceDir = faceDir.rotateLeft();
step++;
}
} else {
while (isTraversable(currentLoc.add(faceDir)) && step < 8) {
faceDir = faceDir.rotateLeft();
step++;
}
step = 0;
while (!isTraversable(currentLoc.add(faceDir)) && step < 8) {
faceDir = faceDir.rotateRight();
step++;
}
}
return currentLoc.add(faceDir);
}
private boolean betterTracingWay(MapLocation s, MapLocation t) {
MapLocation[] tracingLoc = new MapLocation[2];
Direction[] tracingDir = new Direction[2];
int[] tracingcost = new int[2];
int tracingIndex;
Direction nextDir, startTracingDir;
MapLocation nextLoc;
Direction faceDir = controllers.myRC.getDirection();
Direction desDir = s.directionTo(t);
tracingLoc[0] = traceNext(s, desDir, true);
tracingLoc[1] = traceNext(s, desDir, false);
tracingDir[0] = s.directionTo(tracingLoc[0]);
tracingDir[1] = s.directionTo(tracingLoc[0]);
tracingcost[0] = computeCost(0, faceDir, tracingDir[0]);
tracingcost[1] = computeCost(0, faceDir, tracingDir[1]);
do {
if (tracingcost[0] <= tracingcost[1]) {
tracingIndex = 0;
startTracingDir = tracingDir[0].rotateRight().rotateRight();
nextLoc = traceNext(tracingLoc[0], startTracingDir, true);
} else {
tracingIndex = 1;
startTracingDir = tracingDir[1].rotateLeft().rotateLeft();
nextLoc = traceNext(tracingLoc[1], startTracingDir, false);
}
nextDir = tracingLoc[tracingIndex].directionTo(nextLoc);
desDir = tracingLoc[tracingIndex].directionTo(t);
;
if (isOpen(
tracingLoc[tracingIndex],
tracingDir[tracingIndex],
nextDir,
desDir,
tracingIndex == 0)
&& isTraversable(tracingLoc[tracingIndex].add(desDir))) {
return tracingIndex == 0;
} else {
tracingcost[tracingIndex] =
computeCost(tracingcost[tracingIndex], tracingDir[tracingIndex], nextDir);
tracingDir[tracingIndex] = nextDir;
tracingLoc[tracingIndex] = nextLoc;
}
} while (true);
}
public Direction Bug(MapLocation s, MapLocation t, int tolerance) {
// arrive the destination
if (s.distanceSquaredTo(t) <= tolerance) {
reset();
return Direction.OMNI;
}
Direction nextDir;
Direction faceDir = controllers.myRC.getDirection();
// if target is not traversable, back-tracing the destination
while (!isTraversable(t)) {
nextDir = s.directionTo(t);
t = t.subtract(nextDir);
// beside the source
if (s.distanceSquaredTo(t) <= tolerance) {
reset();
return Direction.OMNI;
}
}
modifiedDes = t;
Direction desDir = s.directionTo(t);
MapLocation nextLoc;
if (isTracing) {
Direction startTracingDir =
isCW ? faceDir.rotateRight().rotateRight() : faceDir.rotateLeft().rotateLeft();
nextLoc = traceNext(s, startTracingDir, isCW);
nextDir = s.directionTo(nextLoc);
// The way is open
if (isOpen(s, faceDir, nextDir, desDir, isCW) && isTraversable(s.add(desDir))) {
isTracing = false;
return desDir;
}
return nextDir;
} else {
if (isTraversable(s.add(desDir))) {
return desDir;
} else {
isTracing = true;
isCW = betterTracingWay(s, t);
nextLoc = traceNext(s, desDir, isCW);
return s.directionTo(nextLoc);
}
}
}
private boolean isOpen(
MapLocation currentLoc,
Direction currentDir,
Direction nextDir,
Direction desDir,
boolean cw) {
if (desDir == Direction.OMNI) {
return true;
}
if (!isTraversable(currentLoc.add(currentDir))) return false;
if (cw) {
while (currentDir != nextDir) {
if (currentDir == desDir) return true;
currentDir = currentDir.rotateRight();
}
} else {
while (currentDir != nextDir) {
if (currentDir == desDir) return true;
currentDir = currentDir.rotateLeft();
}
}
return (nextDir == desDir);
}
public void setDestination(MapLocation loc) {
if (loc.equals(destination)) return;
else {
reset();
destination = new MapLocation(loc.x, loc.y);
modifiedDes = new MapLocation(loc.x, loc.y);
}
}
public MapLocation getNextJumpingLocTowardDes(int tolerance) {
MapLocation currentLoc = controllers.myRC.getLocation();
MapLocation jumpLoc = controllers.myRC.getLocation();
MapLocation nextLoc = jumpLoc;
Direction nextDir;
do {
jumpLoc = nextLoc;
if (jumpLoc.distanceSquaredTo(destination) < tolerance && isTraversable(jumpLoc)) {
// controllers.myRC.setIndicatorString(2, "here: " + jumpLoc + ", des" + destination);
return jumpLoc;
}
nextDir = jumpLoc.directionTo(destination);
nextLoc = nextLoc.add(nextDir);
} while (currentLoc.distanceSquaredTo(nextLoc) <= 16);
// controllers.myRC.setIndicatorString(2, "optimal jump to: " + jumpLoc);
// Find alternative jumping location
if (!isTraversable(jumpLoc)) {
while (!jumpLoc.isAdjacentTo(currentLoc)) {
MapLocation temp = jumpLoc;
MapLocation best = null;
int distance = currentLoc.distanceSquaredTo(destination);
for (int i = 0; i < 8; i++) {
temp = jumpLoc.add(Util.dirs[i]);
if (currentLoc.distanceSquaredTo(temp) <= 16
&& isTraversable(temp)
&& temp.distanceSquaredTo(destination) < distance) {
best = temp;
distance = temp.distanceSquaredTo(destination);
}
}
if (best != null) {
return best;
} else {
jumpLoc = jumpLoc.subtract(currentLoc.directionTo(jumpLoc));
}
}
}
if (jumpLoc.isAdjacentTo(currentLoc) || jumpLoc.equals(currentLoc)) return null;
return jumpLoc;
}
public MapLocation getNextJumpingLoc(int tolerance) {
MapLocation jumpLoc = controllers.myRC.getLocation();
MapLocation currentLoc = controllers.myRC.getLocation();
Direction desDir = currentLoc.directionTo(destination);
MapLocation nextLoc = controllers.myRC.getLocation();
Direction nextDir = controllers.myRC.getDirection();
Direction startTracingDir;
if (jumpingTracing) {
// controllers.myRC.setIndicatorString(2, "tracing");
startTracingDir =
isCW ? nextDir.rotateRight().rotateRight() : nextDir.rotateLeft().rotateLeft();
nextLoc = currentLoc.add(startTracingDir, 2);
do {
if (isTraversable(nextLoc)) jumpLoc = nextLoc;
nextLoc = nextLoc.add(startTracingDir);
} while (currentLoc.distanceSquaredTo(nextLoc) <= 16);
if (currentLoc.distanceSquaredTo(currentLoc) > 2) {
jumpingTracing = false;
// controllers.myRC.setIndicatorString(2, "Find good jumpLoc: " + jumpLoc);
return jumpLoc;
}
nextLoc = currentLoc;
nextDir = controllers.myRC.getDirection();
// if( controllers.myRC.senseTerrainTile(currentLoc.add(startTracingDir)) ==
// TerrainTile.OFF_MAP ){
// isCW = !isCW;
// nextDir = nextDir.opposite();
// }
// controllers.myRC.setIndicatorString(2, "Do the bugging");
Direction faceDir;
do {
jumpLoc = nextLoc;
faceDir = nextDir;
startTracingDir =
isCW ? nextDir.rotateRight().rotateRight() : nextDir.rotateLeft().rotateLeft();
nextLoc = traceNext(jumpLoc, startTracingDir, isCW);
nextDir = jumpLoc.directionTo(nextLoc);
desDir = jumpLoc.directionTo(destination);
if (isOpen(jumpLoc, faceDir, nextDir, desDir, isCW) && isTraversable(jumpLoc.add(desDir))) {
// controllers.myRC.setIndicatorString(2, "Open");
jumpingTracing = false;
nextLoc = jumpLoc;
if (jumpLoc.distanceSquaredTo(currentLoc) <= 2) return null;
return jumpLoc;
}
} while (currentLoc.distanceSquaredTo(nextLoc) <= 16);
if (jumpLoc.distanceSquaredTo(currentLoc) <= 2) return null;
return jumpLoc;
} else {
// controllers.myRC.setIndicatorString(2, "go");
jumpLoc = getNextJumpingLocTowardDes(tolerance);
if (jumpLoc == null) {
// controllers.myRC.setIndicatorString(2, "No way to go");
if (isTraversable(currentLoc.add(desDir)))
isCW = betterTracingWay(currentLoc.add(desDir), destination);
else isCW = betterTracingWay(currentLoc, destination);
jumpingTracing = true;
}
}
return jumpLoc;
}