Unity如何获取BoxCollider八个点的世界坐标

项目中想将场景中的BoxCollider的坐标点导出出来让服务器也用用，虽然BoxCollider自身的大小可以获取出来，但是如果有父对象，并且有坐标的变化那算起来就比较麻烦了。幸好Unity提供了一个方法，通过8个标记点来标记获取到boxcollider的坐标。这样不管旋转、缩放都可以计算出正确的坐标点来。如下图所示：

using UnityEngine;  
using System.Collections;  
public class Test : MonoBehaviour   
{  
    //8个标志位 ，用来在scene里预览  
    public Transform[] points;  
    //需要提取Boxcollier顶点的对象  
    public BoxCollider cube;  
    void Start()  
    {  
        //父节只能调节位置， 不能调节旋转和缩放。  
        Transform parent = cube.transform.parent;  
        while(parent!=null)  
        {  
            parent.localRotation = Quaternion.Euler(Vector3.zero);  
            parent.localScale = Vector3.one;  
            parent = parent.parent;  
        }  
    }  
    void Update()  
    {  
        Vector3 [] veces = GetBoxColliderVertexPositions(cube);  
        for(int i =0; i< veces.Length; i )  
        {  
            points[i].transform.position = veces[i];  
        }  
    }  
    Vector3[] GetBoxColliderVertexPositions (BoxCollider boxcollider)   
    {  
        var vertices = new Vector3[8];  
        //下面4个点  
        vertices[0] = boxcollider.transform.TransformPoint(boxcollider.center   new Vector3(boxcollider.size.x, -boxcollider.size.y, boxcollider.size.z) * 0.5f);  
        vertices[1] = boxcollider.transform.TransformPoint( boxcollider.center   new Vector3(-boxcollider.size.x, -boxcollider.size.y, boxcollider.size.z) * 0.5f);  
        vertices[2] = boxcollider.transform.TransformPoint( boxcollider.center   new Vector3(-boxcollider.size.x, -boxcollider.size.y, -boxcollider.size.z) * 0.5f);  
        vertices[3] = boxcollider.transform.TransformPoint(boxcollider.center   new Vector3(boxcollider.size.x, -boxcollider.size.y, -boxcollider.size.z) * 0.5f);  
        //上面4个点  
        vertices[4] = boxcollider.transform.TransformPoint(boxcollider.center   new Vector3(boxcollider.size.x, boxcollider.size.y, boxcollider.size.z) * 0.5f);  
        vertices[5] = boxcollider.transform.TransformPoint( boxcollider.center   new Vector3(-boxcollider.size.x, boxcollider.size.y, boxcollider.size.z) * 0.5f);  
        vertices[6] = boxcollider.transform.TransformPoint( boxcollider.center   new Vector3(-boxcollider.size.x, boxcollider.size.y, -boxcollider.size.z) * 0.5f);  
        vertices[7] = boxcollider.transform.TransformPoint(boxcollider.center   new Vector3(boxcollider.size.x, boxcollider.size.y, -boxcollider.size.z) * 0.5f);  
        return vertices;  
    }  
}