//初始化，在作为组件被挂载时读取设置创建四叉树
private void Awake()
{
QuadtreeSettingSingleton setting = Resources.Load <QuadtreeSettingSingleton>("QuadtreeWithSingletonSetting");
//根据官方所说，Resources的最佳使用方法就是【别用它】，我个人也不喜欢这种把设置数据和游戏本体分到天涯海角的方法，所以我建议在设置完成后改成硬编码
_quadtree = new QuadtreeDataSingleton <GameObject>(setting.top, setting.right, setting.bottom, setting.left, setting.maxLeafsNumber, setting.minSideLength);
}
//移除
public static bool RemoveLeaf(QuadtreeDataSingleton <GameObject> .Leaf leaf)
{
if (_quadtreeObject != null) //移除也是先检测四叉树物体是否存在，不存在的话肯定移除不了，返回 false
{
return(_quadtreeObject._quadtree.RemoveLeaf(leaf));
}
return(false);
}
public static GameObject[] CheckCollision(QuadtreeDataSingleton <GameObject> .Leaf leaf)
{
if (_quadtreeObject != null)
{
return(quadtreeObject._quadtree.CheckCollision(leaf));
}
return(new GameObject[0]);
}
T[] GetCollisionObjectsFromAChild(Vector2 checkPoint, float checkRadius, QuadtreeDataSingleton <T> child)
{
if (child._field.PointToFieldDistance(checkPoint) <= _maxRadius + checkRadius) //这里不光要考虑到检测半径，还要考虑到节点最大半径
{
return(child.CheckCollision(checkPoint, checkRadius));
}
return(new T[] { });
}
public QuadtreeDataSingleton(float top, float right, float bottom, float left, int maxLeafNumber, float minSideLength, QuadtreeDataSingleton <T> root = null, QuadtreeDataSingleton <T> parent = null)
{
_field = new Field(top, right, bottom, left);
_maxLeafsNumber = maxLeafNumber;
_minSideLength = minSideLength;
_root = root != null ? root : this;
_parent = parent;
}
void Split()
{
Debug.Log("<color=#808000>位置在" + _field.top + "," + _field.right + "," + _field.bottom + "," + _field.left + "的树梢节点达到分割条件，进行分割</color>");
Update();
float xCenter = (_field.left + _field.right) / 2;
float yCenter = (_field.bottom + _field.top) / 2;
_upperRightChild = new QuadtreeDataSingleton <T>(_field.top, _field.right, yCenter, xCenter, _maxLeafsNumber, _minSideLength, _root, this);
_lowerRightChild = new QuadtreeDataSingleton <T>(yCenter, _field.right, _field.bottom, xCenter, _maxLeafsNumber, _minSideLength, _root, this);
_lowerLeftChild = new QuadtreeDataSingleton <T>(yCenter, xCenter, _field.bottom, _field.left, _maxLeafsNumber, _minSideLength, _root, this);
_upperLeftChild = new QuadtreeDataSingleton <T>(_field.top, xCenter, yCenter, _field.left, _maxLeafsNumber, _minSideLength, _root, this);
foreach (Leaf leaf in _leafs)
{
SetLeafToChildren(leaf);
}
_leafs = null;
}
private void Awake()
{
_transform = transform;
_leaf = new QuadtreeDataSingleton <GameObject> .Leaf(gameObject, GetLeafPosition(), _radius);
}
//存入
public static bool SetLeaf(QuadtreeDataSingleton <GameObject> .Leaf leaf)
{
return(quadtreeObject._quadtree.SetLeaf(leaf)); //存入时通过接口获取四叉树物体，这样能保证四叉树一直存在，不会发生存入空树
}