/// <summary>
/// Destroys items in a cross shape.
/// </summary>
/// <returns>Points of destroyed items.</returns>
/// <param name="refBoard">Reference to the game board.</param>
/// <param name="centerX">X-coord of the shape centre.</param>
/// <param name="centerY">Y-coord of the shape centre.</param>
public ArrayList DestroyItemsInCrossShape(BoardItem[,] refBoard, int centerX, int centerY)
{
ArrayList destroyed = new ArrayList();
// X-line.
for (int x = centerX - itemCountX; x <= centerX + itemCountX; x++) {
if (x >= 0 && x < refBoard.GetLength(0)) {
if (!refBoard[x, centerY].destroyed) {
refBoard[x, centerY].destroyed = true;
destroyed.Add(new Point(x, centerY));
}
}
}
// Y-line.
for (int y = centerY - itemCountY; y <= centerY + itemCountY; y++) {
if (y >= 0 && y < refBoard.GetLength(1)) {
if (!refBoard[centerX, y].destroyed) {
refBoard[centerX, y].destroyed = true;
destroyed.Add(new Point(centerX, y));
}
}
}
return destroyed;
}