IslandInfo GetShapeIslandCount(Vector2 startPos, BoardLogic board)
{
IslandInfo info = new IslandInfo();
//NOTE: This is since shape can be blown apart we want to still be able to move a block on their
//own island. So the count isn't the shapeCount but only a portion in this count. So we first search
//how big the island is and match against that.
bool[] boardArray = new bool[board.boardWidth * board.boardHeight];
VisitedQueue sentinel = new VisitedQueue();
sentinel.next = sentinel.prev = sentinel;
addToQueryList(sentinel, startPos, boardArray, board);
VisitedQueue queryAt = sentinel.next;
Assert.IsTrue(queryAt != sentinel);
while (queryAt != sentinel)
{
Vector2 pos = queryAt.pos;
Assert.IsTrue(info.count < info.poses.Length);
info.poses[info.count++] = pos;
addToQueryList(sentinel, new Vector2(1, 0) + pos, boardArray, board);
addToQueryList(sentinel, new Vector2(-1, 0) + pos, boardArray, board);
addToQueryList(sentinel, new Vector2(0, 1) + pos, boardArray, board);
addToQueryList(sentinel, new Vector2(0, -1) + pos, boardArray, board);
queryAt = queryAt.next;
}
if (info.count > this.count)
{
//printf("Count At; %d\n", info.count);
//printf("Shape Count: %d\n", shape->count);
}
Assert.IsTrue(info.count <= this.count);
return(info);
}
private void addToQueryList(VisitedQueue sentinel, Vector2 pos, bool[] boardArray, BoardLogic board)
{
if ((int)pos.x >= 0 && (int)pos.x < board.boardWidth && (int)pos.y >= 0 && (int)pos.y < board.boardHeight)
{
int boardIndex = (((int)pos.y) * board.boardWidth) + (int)pos.x;
bool visited = boardArray[boardIndex];
if (!visited && board.GetBoardState(pos) == BoardState.BOARD_SHAPE)
{
boardArray[boardIndex] = true;
VisitedQueue queue = new VisitedQueue();
queue.pos = pos;
//add to the search queue
Assert.IsTrue(sentinel.prev.next == sentinel);
queue.prev = sentinel.prev;
queue.next = sentinel;
sentinel.prev.next = queue;
sentinel.prev = queue;
}
}
}