T[] GetCollisionObjectsFromChildren(Vector2 checkPosition, float checkRadius)
{
List <T> objs = new List <T>();
if (_upperRightChild._field.PointToFieldDistance(checkPosition) <= checkRadius)
{
objs.AddRange(_upperRightChild.CheckCollision(checkPosition, checkRadius)); //这里用的不是 if else 而是连续存入，因为检测的范围是一个圆，基本不可能只在一个节点范围里，因此要把每个子节点都考虑到
}
if (_lowerRightChild._field.PointToFieldDistance(checkPosition) <= checkRadius)
{
objs.AddRange(_lowerRightChild.CheckCollision(checkPosition, checkRadius));
}
if (_lowerLeftChild._field.PointToFieldDistance(checkPosition) <= checkRadius)
{
objs.AddRange(_lowerLeftChild.CheckCollision(checkPosition, checkRadius));
}
if (_upperLeftChild._field.PointToFieldDistance(checkPosition) <= checkRadius)
{
objs.AddRange(_upperLeftChild.CheckCollision(checkPosition, checkRadius));
}
return(objs.ToArray());
}
public static GameObject[] CheckCollision(Vector2 checkPosition, float radius)
{
return(_quadtree.CheckCollision(checkPosition, radius));
}