Unity3D研究院之获取BoxCollider八个点的世界坐标

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;
    }
}