protected ZSquare bestSquareToAvoidConflict(ZSquare target) {
if (isAroundNest()) return null; // Don't avoid conflict when nearby own nest
double dist = 0;
ZSquare best = null;
for (ZSquare s : neighbors) {
if (s.isPassable() && s.getNumberOfAnts() == 0) {
double d = Constants.normalDistance(target.x - s.x, target.y - s.y);
if (d > dist) best = s;
}
}
if (best != null) assert best.isPassable();
return best;
}
protected ZSquare squareTo(Integer key) {
assert key != null;
ZSquare s = squareTo(Constants.decodedX(key), Constants.decodedY(key));
assert s != null;
return s;
}