unity3d的两个立方体&两个球体碰撞检测（c#代码实现）

由于unity自带的碰撞组件特别耗费性能，网上的unity物体碰撞的c#代码实现比较少，没有适合的，只能自己写一个来用：
立方体：

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

namespace Assets
{
    class Class1 : MonoBehaviour
    {
        List<Action> listAction = new List<Action>();
        //用来检测碰撞的间隔时间（可以直接把检测放入update()中，不过100毫秒的定时器效果上也能实现）
        System.Timers.Timer timer = new System.Timers.Timer();
        //原坐标
        Vector3 oldPoint;
        //要移动的坐标
        Vector3 point;
        //0:待机;1:移动
        int currentState = 0;
        //是否可以移动
        bool canMove = true;

        // Use this for initialization
        void Start()
        {
            oldPoint = transform.position;
            timer.Interval = 100;
            timer.Enabled = true;
            timer.Elapsed += (a, b) => isMove(point);
        }

        // Update is called once per frame
        void Update()
        {
            foreach (Action a in listAction) {
                a();
            }
            listAction.Clear();
            point = transform.position;
            if (currentState == 1) {
                if (checkCollision()) {
                    canMove = false;
                }
            }
        }

        void isMove(Vector3 position) {
            if (oldPoint != position)
            {
                if (!canMove)
                {
                    listAction.Add(new Action(()=> gameObject.transform.position = oldPoint));
                    canMove = true;
                }
                else {
                    currentState = 1;
                    oldPoint = position;
                }
            }
            else {
                currentState = 0;
            }
        }

        bool checkCollision() {
            Vector3 zzPoint = gameObject.transform.position;
            Vector3 zzScale = gameObject.transform.localScale;
            //另一物体坐标信息
            GameObject dm = GameObject.Find("Cube (1)");
            Vector3 dmPoint = dm.transform.position;
            Vector3 dmScale = dm.transform.localScale;

            //坐标检测（当两个物体的x、y、z方向间距都小于两个物体在该方向上的长度）
            if ((Math.Abs(zzPoint.x - dmPoint.x) <= zzScale.x / 2 + dmScale.x / 2) &&
                (Math.Abs(zzPoint.y - dmPoint.y) <= zzScale.y / 2 + dmScale.y / 2) &&
                (Math.Abs(zzPoint.z - dmPoint.z) <= zzScale.z / 2 + dmScale.z / 2))
            {
                return true;
            }
            return false;
        }
    }
}

球体：

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

public class sphereCollision : MonoBehaviour {

    List<Action> listAction = new List<Action>();
    //用来检测碰撞的间隔时间（可以直接把检测放入update()中，不过100毫秒的定时器效果上也能实现）
    System.Timers.Timer timer = new System.Timers.Timer();
    //原坐标
    Vector3 oldPoint;
    //要移动的坐标
    Vector3 point;
    //0:待机;1:移动
    int currentState = 0;
    //是否可以移动
    bool canMove = true;

    // Use this for initialization
    void Start()
    {
        oldPoint = transform.position;
        timer.Interval = 100;
        timer.Enabled = true;
        timer.Elapsed += (a, b) => isMove(point);
    }

    // Update is called once per frame
    void Update()
    {
        foreach (Action a in listAction)
        {
            a();
        }
        listAction.Clear();
        point = transform.position;
        if (currentState == 1)
        {
            if (sphereCheckCollision())
            {
                canMove = false;
            }
        }
    }

    void isMove(Vector3 position)
    {
        if (oldPoint != position)
        {
            if (!canMove)
            {
                listAction.Add(new Action(() => gameObject.transform.position = oldPoint));
                canMove = true;
            }
            else
            {
                currentState = 1;
                oldPoint = position;
            }
        }
        else
        {
            currentState = 0;
        }
    }

    bool sphereCheckCollision()
    {
        Vector3 zzPoint = gameObject.transform.position;
        Vector3 zzScale = gameObject.transform.localScale;
        //另一物体坐标信息
        GameObject dm = GameObject.Find("Sphere (1)");
        Vector3 dmPoint = dm.transform.position;
        Vector3 dmScale = dm.transform.localScale;

        //坐标检测（当两个圆相切时，圆心距离为r1+r2,两个圆心在x、y、z上的距离差为x1、x2、x3,用三角函数计算时至少计算两个维度的距离差才能和圆心距进行比较）
        if ((Math.Sqrt(Math.Pow(Math.Abs(zzPoint.x - dmPoint.x), 2) + Math.Pow(Math.Abs(zzPoint.y - dmPoint.y), 2)) <= zzScale.x / 2 + dmScale.x / 2) &&
            (Math.Sqrt(Math.Pow(Math.Abs(zzPoint.x - dmPoint.x), 2) + Math.Pow(Math.Abs(zzPoint.z - dmPoint.z), 2)) <= zzScale.x / 2 + dmScale.x / 2) &&
            (Math.Sqrt(Math.Pow(Math.Abs(zzPoint.y - dmPoint.y), 2) + Math.Pow(Math.Abs(zzPoint.z - dmPoint.z), 2)) <= zzScale.x / 2 + dmScale.x / 2))
        {
            return true;
        }
        return false;
    }

}