/* 当box处于孤立状态时(预下落状态),计算下落坐标 */
private Vector2 calcDropPosition()
{
var currentPositionInArray = new Vector2(transform.position.x, transform.position.y);
var currentX = (int)currentPositionInArray.x;
var currentY = (int)currentPositionInArray.y;
var hitX = new int[] { currentX - 1, currentX, currentX + 1 };
//从当前行倒序遍历地图数组(世界方向向下)
/* Beta: 待解决某些情况源物体以外下落坐标不正确的问题 */
//使用List收集所有的停靠点,取y值最大的坐标点即为最终的停靠点
List <Vector2> dropPositionList = new List <Vector2>();
foreach (var box in _map.GetMap().Reverse())
{
//print(gameObject.name + " check " + box.Key + " " + box.Value.gameObject.name);
if (box.Key.y < currentY && IntArrayContainElement(hitX, (int)box.Key.x))
{
//Debug.LogWarning(box.Value.gameObject.name+" checkInRange " + box.Value.State + " org:" + box.Key + " linked:" + box.Value._linkedPosition);
if (box.Value.State == BoxState.Isolated)
{
//Debug.LogWarning(gameObject.name + " use " + box.Value.gameObject.name + " _linkedPosition.y:" + box.Value._linkedPosition.y);
//return new Vector2(currentX, box.Value._linkedPosition.y + 1);
dropPositionList.Add(new Vector2(currentX, box.Value._linkedPosition.y + 1));
}
else
{
//Debug.LogWarning(gameObject.name + " use " + box.Value.gameObject.name + " .y:" + box.Key.y);
//return new Vector2(currentX, box.Key.y + 1);
dropPositionList.Add(new Vector2(currentX, box.Key.y + 1));
}
}
}
/* 查找最上方的停靠点 */
if (dropPositionList.Count != 0)
{
return((from pos in dropPositionList
orderby pos.y descending
select pos).ToArray()[0]);
}
Debug.LogWarning("dropPosition not found");
//如果没有找到停靠点，则返回地图外最下方的坐标
return(_nilPosition);
}