/// <summary>
/// 更新节点
/// </summary>
public void Update()
{
if (parent == null)
{
return;
}
if (CheckState(parent) == PFQuadNodeState.In)
{
if (parent.children == null)
{
return;
}
int index;
index = point.x <= (parent.rect.x + parent.rect.x1) / 2 ? 0 : 1;
index = point.y <= (parent.rect.y + parent.rect.y1) / 2 ? index : index + 2;
if (CheckState(parent.children[index]) != PFQuadNodeState.In)
{
return;
}
}
PFQuadTree tempParent = parent;
parent.RemoveQuadNode(this);
tempParent.root.AddQuadNode(this);
tempParent.Update();
}
void InitRuntime(PFQuadTree root, PFQuadTree parent, PFRect rect, int depath)
{
this.root = root == null ? this : root;
this.parent = parent;
this.rect = rect;
this.depath = depath;
quadLinkedList.Clear();
}
public void ReleaseToCache()
{
parent = null;
if (quadLinkedList.Count > 0)
{
Debug.Fail("清理树节点异常：不应该存在PFIQuadNode");
}
ResetRuntime();
}
public PFQuadTree(PFQuadTree root, PFQuadTree parent, PFRect rect, int depath)
{
this.rect = rect;
this.root = root == null ? this : root;
this.parent = parent;
children = null;
this.depath = depath;
quadLinkedList = new LinkedList <PFQuadCircle>();
}
/// <summary>
/// 回收子节点
/// </summary>
/// <param name="parentQuadLinkedList"></param>
void RecycleQuadNodesFromChildren(PFQuadTree quadTree, LinkedList <PFQuadCircle> parentQuadLinkedList)
{
if (children == null)
{
foreach (var quadNode in quadLinkedList)
{
parentQuadLinkedList.AddLast(quadNode);
quadNode.parent = quadTree;
quadNode.parentLinkNode = parentQuadLinkedList.Last;
}
quadLinkedList.Clear();
return;
}
foreach (var quadTress in children)
{
quadTress.RecycleQuadNodesFromChildren(quadTree, parentQuadLinkedList);
}
}
public static void __FindNearQuadNodes(PFQuadTree quadTree, PFIQuadNode quadNode, List <PFQuadCircle> tempList)
{
if (quadTree.quadLinkedList.Count > 0)
{
foreach (var tempQuadNode in quadTree.quadLinkedList)
{
tempList.Add(tempQuadNode);
}
}
if (quadNode.parent == quadTree)
{
return;
}
if (quadTree.children != null)
{
int index;
index = quadNode.point.x <= (quadTree.rect.x + quadTree.rect.x1) / 2 ? 0 : 1;
index = quadNode.point.y <= (quadTree.rect.y + quadTree.rect.y1) / 2 ? index : index + 2;
__FindNearQuadNodes(quadTree.children[index], quadNode, tempList);
}
}
/// <summary>
///判断节点与区域的关系
/// </summary>
/// <param name="quadTree"></param>
/// <returns></returns>
public override PFQuadNodeState CheckState(PFQuadTree quadTree)
{
if ((point.x - radius >= quadTree.rect.x) &&
(point.x + radius <= quadTree.rect.x1) &&
(point.y - radius >= quadTree.rect.y) &&
(point.y + radius <= quadTree.rect.y1)
)
{
return(PFQuadNodeState.In);
}
else
{
if (PFMathIntersection.RectCircleIntersect(quadTree.rect, point, radius))
{
return(PFQuadNodeState.Intersect);
}
else
{
return(PFQuadNodeState.Out);
}
}
}
public abstract PFQuadNodeState CheckState(PFQuadTree quadTree);
/// <summary>
/// 添加节点
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="quadNode">节点</param>
public PFQuadNodeState AddQuadNode(PFQuadCircle quadNode)
{
PFQuadNodeState state = quadNode.CheckState(this);
int index = 0;
switch (state)
{
//在自己范围内，如果在子节点内，则由子节点持有。如果与子节点相交或者不存在子节点，则自己持有
case PFQuadNodeState.In:
if (children != null)
{
index = quadNode.point.x <= (rect.x + rect.x1) / 2 ? 0 : 1;
index = quadNode.point.y <= (rect.y + rect.y1) / 2 ? index : index + 2;
switch (children[index].AddQuadNode(quadNode))
{
case (PFQuadNodeState.In):
return(PFQuadNodeState.In);
case (PFQuadNodeState.Intersect):
break;
case (PFQuadNodeState.Out):
Debug.Fail("AddQuadNode 异常：子节点状态OUT");
return(PFQuadNodeState.Out);
}
}
quadLinkedList.AddLast(quadNode);
quadNode.parentLinkNode = quadLinkedList.Last;
quadNode.parent = this;
break;
//相交则不保存，由父节点继续持有
case PFQuadNodeState.Intersect:
if (parent == null)
{
UnityEngine.Debug.LogError("AddQuadNode 异常：节点不在根数节点内");
}
break;
case PFQuadNodeState.Out:
UnityEngine.Debug.LogError("AddQuadNode 异常：状态OUT");
break;
}
//如果数量超过容纳范围，则将当前格子分裂4块
if ((children == null) && (quadLinkedList.Count > PATH_FINDER_CONTAIN_NUMBER))
{
children = new PFQuadTree[4];
for (int i = 0; i < 4; i++)
{
int x = rect.x + (rect.x1 - rect.x) / 2 * (i % 2);
int y = rect.y + (rect.y1 - rect.y) / 2 * (i / 2);
int x1 = x + (rect.x1 - rect.x) / 2;
int y1 = y + (rect.y1 - rect.y) / 2;
children[i] = MctCacheManager.GetInstantiateFromCache <PFQuadTree>();
if (children[i] != null)
{
children[i].InitRuntime(root, this, new PFRect(x, y, x1, y1), depath + 1);
}
else
{
children[i] = new PFQuadTree(root, this, new PFRect(x, y, x1, y1), depath + 1);
}
}
//将父节点的节点转到子节点
LinkedListNode <PFQuadCircle> node;
LinkedListNode <PFQuadCircle> nodeNext;
node = quadLinkedList.First;
while (node != null)
{
nodeNext = node.Next;
PFQuadCircle tempQuadNode = node.Value;
index = tempQuadNode.point.x <= (rect.x + rect.x1) / 2 ? 0 : 1;
index = tempQuadNode.point.y <= (rect.y + rect.y1) / 2 ? index : index + 2;
switch (children[index].AddQuadNode(tempQuadNode))
{
case (PFQuadNodeState.In):
quadLinkedList.Remove(node);
break;
case (PFQuadNodeState.Intersect):
break;
case (PFQuadNodeState.Out):
Debug.Fail("AddQuadNode 异常：分配子节点状态OUT");
break;
}
node = nodeNext;
}
}
return(state);
}
public void FindNearQuadNodes(PFQuadCircle quadNode, List <PFQuadCircle> tempList)
{
PFQuadTree quadTree = root;
__FindNearQuadNodes(root, quadNode, tempList);
}
