c#四叉树算法实现

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public delegate void UQtCellChanged（UQtLeaf left UQtLeaf entered）;
public delegate void UQtCellSwapIn（UQtLeaf leaf）;
public delegate void UQtCellSwapOut（UQtLeaf leaf）;

public static class UQtConfig
{
    // this value determines the smallest cell size
    // the space-partition process would stop dividing if cell size is smaller than this value
    public static float CellSizeThreshold = 50.0f;

    // swap-in distance of cells
    public static float CellSwapInDist = 100.0f;
    // swap-out distance of cells 
    //  （would be larger than swap-in to prevent poping）
    public static float CellSwapOutDist = 150.0f;

    // time interval to update the focus point
    // so that a new swap would potentially triggered （in seconds）
    public static float SwapTriggerInterval = 0.5f;
    // time interval to update the in/out swapping queues （in seconds）
    public static float SwapProcessInterval = 0.2f;
}

// user data stored in quadtree leaves
public interface IQtUserData
{
    Vector3 GetCenter（）;
    Vector3 GetExtends（）;

    void SwapIn（）;
    void SwapOut（）;

    bool IsSwapInCompleted（）;
    bool IsSwapOutCompleted（）;
}

public class UQtNode
{
    public UQtNode（Rect bound）
    {
        _bound = bound;
    }

    public Rect Bound { get { return _bound; } }
    protected Rect _bound;

    public virtual void SetSubNodes（UQtNode[] subNodes）
    {
        _subNodes = subNodes;
    }

    public virtual void Receive（IQtUserData userData）
    {
        if （!UQtAlgo.Intersects（Bound userData））
        {
            return;
        }

        foreach （var sub in SubNodes）
        {
            sub.Receive（userData）;
        }
    }

    public UQtNode[] SubNodes { get { return _subNodes; } }
    public const int SubCount = 4;
    protected UQtNode[] _subNodes = null;
}

public class UQtLeaf : UQtNode
{
    public UQtLeaf（Rect bound） : base（bound）
    {
    }
    public override void SetSubNodes（UQtNode[] subNodes）
    {
        UCore.Assert（false）;
    }

    public override void Receive（IQtUserData userData）
    {
        if （!UQtAlgo.Intersects（Bound userData））
            return;

        if （Bound.Contains（new Vector2（userData.GetCenter（）.x userData.GetCenter（）.z）））
        {
            _ownedobjects.Add（userData）;            
        }
        else
        {
            _affectedobjects.Add（userData）;
        }
    }

    public void SwapIn（）
    {
        foreach （var obj in _ownedobjects）
            obj.SwapIn（）;
        foreach （var obj in _affectedobjects）
            obj.SwapIn（）;
    }

    public void SwapOut（）
    {
        foreach （var obj in _ownedobjects）
            obj.SwapOut（）;
        foreach （var obj in _affectedobjects）
            obj.SwapOut（）;
    }

    public bool IsSwapInCompleted（）
    {
        foreach （var obj in _ownedobjects）
        {
            if （!obj.IsSwapInCompleted（））
                return false;
        }
        fore

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2015-07-19 06:56  uquadtree-master
     文件         499  2015-07-19 06:56  uquadtree-master.gitignore
     文件        1084  2015-07-19 06:56  uquadtree-masterLICENSE
     文件         128  2015-07-19 06:56  uquadtree-masterREADME.md
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtreeUnity-5.0.1f1
     文件     3470336  2015-07-19 06:56  uquadtree-masteruquadtreeUnity-5.0.1f1UnityEditor.dll
     文件      794112  2015-07-19 06:56  uquadtree-masteruquadtreeUnity-5.0.1f1UnityEngine.dll
     文件         974  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtree.sln
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtree
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtreeProperties
     文件        1394  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtreePropertiesAssemblyInfo.cs
     文件        7628  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtreeUQuadtree.cs
     文件        4971  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtreeUQuadtree_Internal.cs
     文件        2604  2015-07-19 06:56  uquadtree-masteruquadtreeuquadtreeuquadtree.csproj
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree_test
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree_testAssets
     文件         191  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtree.meta
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtree
     文件         191  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeMaterials.meta
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeMaterials
     文件        4268  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeMaterialsGround.mat
     文件         179  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeMaterialsGround.mat.meta
     文件         191  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeScenes.meta
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeScenes
     文件       34178  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeScenes est_scene.unity
     文件         174  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreeScenes est_scene.unity.meta
     文件         191  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreescripts.meta
     目录           0  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreescripts
     文件        1900  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreescriptsUTestBootstrap.cs
     文件         262  2015-07-19 06:56  uquadtree-masteruquadtree_testAssetsUQuadtreescriptsUTestBootstrap.cs.meta
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