using System.Collections;

using System.Collections.Generic;

using UnityEngine;

public class MoveWorldBlockManager : MonoBehaviour

{

private IEnumerator OnMouseDown()

{

//將三維物體坐標(biāo)轉(zhuǎn)換成屏幕坐標(biāo)

Vector3 screenPosition = Camera.main.WorldToScreenPoint(transform.position);

//鼠標(biāo)屏幕坐標(biāo)

Vector3 currentScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPosition.z);

//將鼠標(biāo)屏幕坐標(biāo)轉(zhuǎn)換成三維坐標(biāo)

Vector3 mouseWorldPosition = Camera.main.ScreenToWorldPoint(currentScreenSpace);

//計(jì)算物體位置與鼠標(biāo)之間的距離

Vector3 offset = transform.position - mouseWorldPosition;

//提前定義好返回值

var cs = new WaitForFixedUpdate();

//當(dāng)按下鼠標(biāo)左鍵時(shí)

while (Input.GetMouseButton(0))

{

//更新鼠標(biāo)屏幕坐標(biāo)

currentScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPosition.z);

//將鼠標(biāo)屏幕坐標(biāo)轉(zhuǎn)換成三維坐標(biāo)

mouseWorldPosition = Camera.main.ScreenToWorldPoint(currentScreenSpace);

//移動(dòng)物體坐標(biāo)

Vector3 currentPosition = mouseWorldPosition + offset;

//將物體坐標(biāo)設(shè)置成移動(dòng)后的坐標(biāo)

transform.position = currentPosition;

//返回 (只有當(dāng)下一次fixedUpdate開始時(shí)再執(zhí)行后續(xù)代碼)

yield return cs;

}

}

}