T[] GetCollisionObjectsFromAChild(Vector2 checkPoint, float checkRadius, QuadtreeNestedClass <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[0]);
}
public QuadtreeNestedClass(float top, float right, float bottom, float left, int maxLeafNumber, float minSideLength, QuadtreeNestedClass <T> root = null, QuadtreeNestedClass <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 QuadtreeNestedClass <T>(_field.top, _field.right, yCenter, xCenter, _maxLeafsNumber, _minSideLength, _root, this);
_lowerRightChild = new QuadtreeNestedClass <T>(yCenter, _field.right, _field.bottom, xCenter, _maxLeafsNumber, _minSideLength, _root, this);
_lowerLeftChild = new QuadtreeNestedClass <T>(yCenter, xCenter, _field.bottom, _field.left, _maxLeafsNumber, _minSideLength, _root, this);
_upperLeftChild = new QuadtreeNestedClass <T>(_field.top, xCenter, yCenter, _field.left, _maxLeafsNumber, _minSideLength, _root, this);
foreach (Leaf leaf in _leafs)
{
SetLeafToChildren(leaf);
}
_leafs = null;
}
public static bool RemoveLeaf(QuadtreeNestedClass <GameObject> .Leaf leaf)
{
return(_quadtree.RemoveLeaf(leaf));
}
public static GameObject[] CheckCollision(QuadtreeNestedClass <GameObject> .Leaf leaf)
{
return(_quadtree.CheckCollision(leaf));
}
private void Awake()
{
_quadtree = new QuadtreeNestedClass <GameObject>(_top, _right, _bottom, _left, _maxLeafsNumber, _minSideLength);
}
QuadtreeNestedClass <GameObject> .Leaf _leaf; //因为叶子变成了四叉树的内部类，这里就需要通过 四叉树类.叶子类 来表示叶子类
private void Awake()
{
_transform = transform;
_leaf = new QuadtreeNestedClass <GameObject> .Leaf(gameObject, GetLeafPosition(), _radius);
}