void OnTileClicked(SlidingTile clickedTile)
{
if (_isComplete)
{
return;
}
Vector2 gridPos = GridPositionForTileIndex(clickedTile.Index);
int tileX = (int)gridPos.x;
int tileY = (int)gridPos.y;
// poll all four directions for an opent spot
bool left = CanMoveLeft(tileX, tileY);
bool right = CanMoveRight(tileX, tileY);
bool up = CanMoveUp(tileX, tileY);
bool down = CanMoveDown(tileX, tileY);
bool canMoveToOpenSpace = (left || right || up || down);
if (canMoveToOpenSpace)
{
SwapTileWithOpenSpace(clickedTile);
CheckComplete();
}
}
void SwapTileWithOpenSpace(SlidingTile clickedTile)
{
int newOpenTileIndex = clickedTile.Index;
int newTileIndex = _currentOpenTile.Index;
Vector2 newOpenGridPos = GridPositionForTileIndex(newOpenTileIndex);
Vector3 newTileGridPos = GridPositionForTileIndex(newTileIndex);
_gameBoard[(int)newOpenGridPos.x, (int)newOpenGridPos.y] = _currentOpenTile;
_gameBoard[(int)newTileGridPos.x, (int)newTileGridPos.y] = clickedTile;
Vector3 newOpenTilePosition = PositionForTileIndex(newOpenTileIndex);
Vector3 newTilePosition = PositionForTileIndex(newTileIndex);
clickedTile.MoveToPosition(newTileIndex, newTilePosition);
_currentOpenTile.MoveToPosition(newOpenTileIndex, newOpenTilePosition);
}
void CreatePuzzleBoard(RectTransform parent, Texture2D puzzleImage)
{
_canvas = parent;
_boardImage = puzzleImage;
_tileWidth = (_canvas.sizeDelta.x / _gridWidth);
_tileHeight = (_canvas.sizeDelta.y / _gridHeight);
_gameBoard = new SlidingTile[_gridWidth, _gridHeight];
for (int y = 0; y < _gridHeight; y++)
{
for (int x = 0; x < _gridWidth; x++)
{
CreateTile(x, y);
SetTileSprite(x, y);
}
}
_currentOpenTile = _gameBoard[0, 0];
_currentOpenTile.gameObject.SetActive(false);
StartCoroutine(RandomizeInitialLayout());
}