鼠标点哪里，哪里出特效

using UnityEngine;
using System.Collections;

public class ClickUIManager : MonoBehaviour {
private float OldTime =0.0f;
private float NewTime =0.0f;
private Vector3 mPosition;

public GameObject mClickTransfrom;

private float myScreenWidth;
private float myScreenHeight;

private float x =0.0f;
private float y = 0.0f;
private float z=10.0f;

void Start()
{
myScreenWidth = Screen.width;
myScreenHeight = Screen.height;
}

void FixedUpdate () {

if (Input.GetMouseButtonDown (0)) {    //首先判断是否点击了鼠标左键

OldTime = Time.realtimeSinceStartup;
  //定义一条射线，这条射线从摄像机屏幕射向鼠标所在位置
}

if(Input.GetMouseButtonUp(0))
{
NewTime =  Time.realtimeSinceStartup;
if(NewTime - OldTime <0.15f)
{
    x = Input.mousePosition.x - myScreenWidth/2;
    y= Input.mousePosition.y - myScreenHeight/2;

mClickTransfrom.transform.localPosition =new Vector3(x/myScreenWidth*1080,y/myScreenHeight*1920,-500f);
mClickTransfrom.SetActive(false);
mClickTransfrom.SetActive(true);
}
}

}
}

这里 通过判断时间 来减少频率，  Input.mousePosition  是2维屏幕的直接坐标，但是却 以中心点为0,0 根据实际屏幕大小得到的坐标值，所以要对其进行处理后才能正常使用。