/// <summary>
/// 在无碰撞的前提下行走最远的距离
/// </summary>
/// <param name="obj">移动物体，默认obj.Rigid为true</param>
/// <param name="moveVec">移动的位移向量</param>
private void MoveMax(GameObject obj, Vector moveVec)
{
/*由于四周是墙，所以人物永远不可能与越界方块碰撞*/
XYPosition nextPos = obj.Position + Vector.Vector2XY(moveVec);
uint maxLen = collisionChecker.FindMax(obj, nextPos, moveVec);
maxLen = (uint)Math.Min(maxLen, (obj.MoveSpeed / Map.Constant.numOfStepPerSecond));
obj.Move(new Vector(moveVec.angle, maxLen));
}
/// <summary>
/// 碰撞检测，如果这样行走是否会与之碰撞，返回与之碰撞的物体
/// </summary>
/// <param name="obj">移动的物体</param>
/// <param name="moveVec">移动的位移向量</param>
/// <returns>和它碰撞的物体</returns>
public GameObject?CheckCollision(GameObject obj, Vector moveVec)
{
XYPosition nextPos = obj.Position + Vector.Vector2XY(moveVec);
if (!obj.IsRigid)
{
if (gameMap.OutOfBound(obj))
{
return(new OutOfBoundBlock(nextPos));
}
return(null);
}
//在某列表中检查碰撞
Func <ArrayList, ReaderWriterLockSlim, GameObject> CheckCollisionInList =
(ArrayList lst, ReaderWriterLockSlim listLock) =>
{
GameObject?collisionObj = null;
listLock.EnterReadLock();
try
{
foreach (GameObject listObj in lst)
{
if (WillCollide(obj, listObj, nextPos))
{
collisionObj = listObj;
break;
}
}
}
finally { listLock.ExitReadLock(); }
return(collisionObj);
};
GameObject collisionObj = null;
foreach (var list in lists)
{
if ((collisionObj = CheckCollisionInList(list.Item1, list.Item2)) != null)
{
return(collisionObj);
}
}
//如果越界，则与越界方块碰撞
if (gameMap.OutOfBound(obj))
{
return(new OutOfBoundBlock(nextPos));
}
return(null);
}