QuadTree四叉树实现代码 C#

这个代码是一个四叉树的C#实现，使用四叉树文成一个可视项目。四叉树是一种树结构可以用于编码和2D碰撞检测。多用在2D碰撞检测中，在大量的碰撞检测中可以提高效率，但结构略复杂。

using System;
using System.Windows;

namespace CSharpQuadTree
{
    public interface IQuadobject
    {
        Rect Bounds { get; }
        event EventHandler BoundsChanged;
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         917  2009-07-09 11:58  CSharpQuadTree.sln
     文件       18944  2009-07-09 12:01  CSharpQuadTree.suo
     文件         191  2009-07-09 12:01  IQuadobject.cs
     文件         432  2009-07-09 12:01  Output.cs
     文件         517  2009-07-09 12:01  Program.cs
     文件       19600  2009-07-09 12:01  QuadTree.cs
     文件       15201  2009-07-09 12:02  QuadTreeTestForm.cs
     文件        3879  2009-07-09 12:02  QuadTreeTestForm.Designer.cs
     目录           0  2009-07-09 12:04  Properties\_svn\
     文件         339  2009-07-09 12:04  Properties\_svn\entries
     目录           0  2009-07-09 12:04  Properties\_svn\prop-base\
     目录           0  2009-07-09 12:04  Properties\_svn\props\
     目录           0  2009-07-09 12:04  Properties\_svn\text-base\
     目录           0  2009-07-09 12:04  Properties\_svn\tmp\
     目录           0  2009-07-09 12:04  Properties\_svn\tmp\prop-base\
     目录           0  2009-07-09 12:04  Properties\_svn\tmp\props\
     目录           0  2009-07-09 12:04  Properties\_svn\tmp\text-base\
     文件        1458  2009-07-09 11:58  Properties\AssemblyInfo.cs
     文件        2857  2009-07-09 11:58  Properties\Resources.Designer.cs
     文件        5612  2009-07-09 11:58  Properties\Resources.resx
     文件        1099  2009-07-09 11:58  Properties\Settings.Designer.cs
     文件         249  2009-07-09 11:58  Properties\Settings.settings
     文件        3892  2009-07-09 12:01  CSharpQuadTree.csproj