[游戏开发]Unity3D使物体跟随鼠标旋转

代码

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

public class RotateToMouse : MonoBehaviour
{
    public float speed;
    private Vector2 direction;

    private Vector2 direction2;
    void Update()
    {
        FollowMouse();
    }
    void FollowMouse()
    {
        //得到物体指向鼠标位置的向量
        direction = Camera.main.ScreenToWorldPoint(Input.mousePosition) - transform.position;
        //通过反正切函数得到弧度并转化为角度
        float rotateAngle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
        //指定向屏幕外的z轴为旋转轴并且旋转
        Quaternion rotation = Quaternion.AngleAxis(rotateAngle, Vector3.forward);
        transform.rotation = Quaternion.Slerp(transform.rotation,rotation,speed*Time.deltaTime);
    }
    void FollowMouse2()
    {
        direction2 = ((Vector2)Camera.main.ScreenToWorldPoint(Input.mousePosition) - new Vector2(transform.position.x, transform.position.y)).normalized;
        transform.right = direction2;
    }
}