如何向移动方向旋转 2D 精灵？

Question

我整天都在搜索并阅读论坛，但我找不到有效的方法。 我正在制作一个自上而下的恐怖游戏。 当我的玩家正常行走时，他可以用光标向任何方向环顾四周，但当他想跑步时，他会切换到“坦克”控件并朝跑步方向旋转。 我需要这样的东西。 到目前为止，我的玩家移动脚本：

public float walkSpeed;
public float runSpeed;
public float turnSpeed;
private Rigidbody2D rb;
public Camera cam;
private Vector2 moveDirection;

void Start()
{
    rb = GetComponent<Rigidbody2D>();
}

void Update()
{
    ProcessInput();
}

void FixedUpdate()
{
    Move();
}

private void ProcessInput()
{
    float moveX = Input.GetAxisRaw("Horizontal");
    float moveY = Input.GetAxisRaw("Vertical");

    moveDirection = new Vector2(moveX, moveY).normalized;
}
void Move()
{
    if (Input.GetKey(KeyCode.LeftShift))
    {
        //Looking toward movement direction should be applied here
    } else { 
        rb.velocity = new Vector2(moveDirection.x * walkSpeed, moveDirection.y * walkSpeed);

        Vector3 mousePosition = cam.ScreenToWorldPoint(Input.mousePosition);
        Vector2 direction = mousePosition - transform.position;
        float angle = Vector2.SignedAngle(Vector2.right, direction) - 90f;
        Vector3 targetRotation = new Vector3(0, 0, angle);
        transform.rotation = Quaternion.RotateTowards(transform.rotation, Quaternion.Euler(targetRotation), turnSpeed * Time.deltaTime);
    }
}

任何帮助是极大的赞赏！ 提前致谢！

Answer 1

这个问题可以通过用moveDirection代替鼠标看方向来解决，这里定义一个名为 direction 的假设变量来检测每个条件下的正确方向就足够了。

var direction = new Vector2();
var currentSpeed = walkSpeed;

if (Input.GetKey(KeyCode.LeftShift))
{
    direction = moveDirection;

    currentSpeed = runSpeed;

} else {
    direction = cam.ScreenToWorldPoint(Input.mousePosition) - transform.position;
}

var angle = Vector2.SignedAngle(Vector2.right, direction) - 90f;
var targetRotation = new Vector3(0, 0, angle);
var lookTo = Quaternion.Euler(targetRotation);

rb.velocity = new Vector2(moveDirection.x, moveDirection.y) * runSpeed *Time.deltaTime;
transform.rotation = Quaternion.RotateTowards(transform.rotation, lookTo , turnSpeed * Time.deltaTime);