void IDragHandler.OnDrag(PointerEventData eventData)
{
if (tile.LockedInput)
{
return;
}
Vector2 dragDelta = eventData.position - beginDragPosition;
if (dragDelta.magnitude > DRAG_DISTANCE_THRESHOLD)
{
TileDirection dragDirection;
if (Mathf.Abs(dragDelta.x) > Mathf.Abs(dragDelta.y))
{
dragDirection = Mathf.Sign(dragDelta.x) > 0 ? TileDirection.Right : TileDirection.Left;
}
else
{
dragDirection = Mathf.Sign(dragDelta.y) > 0 ? TileDirection.Up : TileDirection.Down;
}
Tile otherTile = tableNavigator.FindTileInDirection(tile.Position, dragDirection);
if (otherTile == null)
{
tile.ToggleSelect(false);
table.DeselectedTile(tile);
}
else
{
table.SwitchTiles(tile, otherTile);
}
}
}
public TileType FindMatchingTypeInDirection(Vector2Int tablePosition, TileDirection direction)
{
switch (direction)
{
case TileDirection.Left:
{
// can't match to the left if not two away from left
if (!tableNavigator.TileExistsInDirection(new Vector2Int(tablePosition.x - 1, tablePosition.y), direction))
{
return(null);
}
_tileA = tableNavigator.FindTileInDirection(tablePosition, direction);
_tileB = tableNavigator.FindTileInDirection(_tileA.Position, direction);
break;
}
case TileDirection.Right:
{
// can't match to the right if not two away from right
if (!tableNavigator.TileExistsInDirection(new Vector2Int(tablePosition.x + 1, tablePosition.y), direction))
{
return(null);
}
_tileA = tableNavigator.FindTileInDirection(tablePosition, direction);
_tileB = tableNavigator.FindTileInDirection(_tileA.Position, direction);
break;
}
case TileDirection.Up:
{
// can't match up if not 2 away from top
if (!tableNavigator.TileExistsInDirection(new Vector2Int(tablePosition.x, tablePosition.y - 1), direction))
{
return(null);
}
_tileA = tableNavigator.FindTileInDirection(tablePosition, direction);
_tileB = tableNavigator.FindTileInDirection(_tileA.Position, direction);
break;
}
case TileDirection.Down:
{
// can't match up if not 2 away from bottom
if (!tableNavigator.TileExistsInDirection(new Vector2Int(tablePosition.x, tablePosition.y + 1), direction))
{
return(null);
}
_tileA = tableNavigator.FindTileInDirection(tablePosition, direction);
_tileB = tableNavigator.FindTileInDirection(_tileA.Position, direction);
break;
}
case TileDirection.Horizontal:
{
// can't match horizontally if position is in left or right corners
if (!tableNavigator.TileExistsInDirection(new Vector2Int(tablePosition.x, tablePosition.y), direction))
{
return(null);
}
_tileA = tableNavigator.FindTileInDirection(tablePosition, direction);
_tileB = tableNavigator.FindTileInDirection(_tileA.Position, direction);
break;
}
case TileDirection.Vertical:
{
// can't match vertically if position is in top or bottom corners
if (!tableNavigator.TileExistsInDirection(new Vector2Int(tablePosition.x, tablePosition.y), direction))
{
return(null);
}
_tileA = tableNavigator.FindTileInDirection(tablePosition, direction);
_tileB = tableNavigator.FindTileInDirection(_tileA.Position, direction);
break;
}
default:
throw new UnityException(TableNavigator.INVALID_DIRECTION_MESSAGE);
}
if (_tileA.Equals(_tileB))
{
return(_tileA.Type);
}
else
{
return(null);
}
}
