鼠標點哪裏，哪裏出特效

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)) {    //首先判斷是否點擊了鼠標左鍵

			OldTime = Time.realtimeSinceStartup;
			  //定義一條射線，這條射線從攝像機屏幕射向鼠標所在位置
		}

		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);
			}
		}

	}
}

這裏 通過判斷時間 來減少頻率，  Input.mousePosition  是2維屏幕的直接座標，但是卻 以中心點爲0,0 根據實際屏幕大小得到的座標值，所以要對其進行處理後才能正常使用。