public void pawnPromotion(Point p) {
if (b.get(p) instanceof Pawn && p.getY() == 8) {
b.remove(p);
b.put(p, new Queen(true));
} else if (b.get(p) instanceof Pawn && p.getY() == 1) {
b.remove(p);
b.put(p, new Queen(false));
}
}
public boolean checkIfPathIsClear(Point startPosition, Point endPosition) {
boolean isPathClear = true;
Point difference = new Point();
difference.setLocation(
Math.abs(endPosition.getX() - startPosition.getX()),
Math.abs(endPosition.getY() - startPosition.getY()));
if (difference.getX() > 0 && difference.getY() == 0) {
int largerPlace =
(int)
(startPosition.getX() > endPosition.getX()
? startPosition.getX()
: endPosition.getX());
for (int j = (int) (largerPlace - (difference.getX() - 1)); j < largerPlace; j++) {
if (b.containsKey(new Point(j, (int) startPosition.getY()))) {
isPathClear = false;
}
}
} else if ((int) difference.getY() > 0 && (int) difference.getX() == 0) {
int largerPlace = 0;
if (startPosition.getY() > endPosition.getY()) {
largerPlace = (int) startPosition.getY();
} else {
largerPlace = (int) endPosition.getY();
}
for (int i = largerPlace - ((int) difference.getY() - 1); i < largerPlace; i++) {
if (b.containsKey(new Point((int) startPosition.getX(), i))) {
isPathClear = false;
}
}
} else if (difference.getX() == difference.getY()) {
int leftPoint =
(int)
(startPosition.getX() < endPosition.getX()
? startPosition.getY()
: endPosition.getY());
int rightPoint =
(int)
(startPosition.getX() > endPosition.getX()
? startPosition.getY()
: endPosition.getY());
int largerPlace =
(int)
(startPosition.getX() > endPosition.getX()
? startPosition.getX()
: endPosition.getX());
int slope = leftPoint - rightPoint;
int y = slope > 0 ? leftPoint - 1 : leftPoint + 1;
for (int j = (int) (largerPlace - (difference.getX() - 1)); j < largerPlace; j++) {
if (b.containsKey(new Point(j, y))) {
isPathClear = false;
}
y = slope > 0 ? y - 1 : y + 1;
}
}
return isPathClear;
}