将玩家旋转至其标题

Question

I'm trying to replicate a movement system from an old flash game I'm basing a game I'm making in unity on (just for practice, mostly.) The main problem I have is that the player doesn't 'look' towards where he is going. He just looks in the direction all the time.

Here's what mine currently looks like

and here's what I want it to look like .

I've tried doing it but I couldn't find a solution that worked nicely (and the code for it is long gone). If someone could help me implement such a thing, that would be great!

The code for my player control:

public void PlayerFixedUpdate () {
    if (Input.GetKey(KeyCode.A) && transform.position.x > -44){
        if (body.velocity.x > -15){
            body.AddForce(new Vector2(-15,0),ForceMode2D.Force);
        }
    }
    if (Input.GetKey(KeyCode.D) && transform.position.x < 9){
        if (body.velocity.x < 15){
            body.AddForce(new Vector2(15,0),ForceMode2D.Force);
        }
    }
    if (Input.GetKey(KeyCode.W) && transform.position.y < 24){
        if (body.velocity.y < 15*body.mass){
            body.AddForce(new Vector2(0,15),ForceMode2D.Force);
        }
    }
    if (Input.GetKey(KeyCode.S) && transform.position.y > -1){
        if (body.velocity.y > -15*body.mass){
            body.AddForce(new Vector2(0,-15),ForceMode2D.Force);
        }
    }
}

Answer 1

Depends how your object is set up, but one solution would be to set the rotation in the direction of the velocity component.

void rotateFace()
{
   Vector2 dir = rbody.velocity.normalized; // where rbody is your rigidbody2D
   transform.rotation = Quaternion.Euler(0, 0, Mathf.Atan2(dir.y, dir.x)*Mathf.Rad2Deg - 90); //may not need 90deg offset here
}

You may want to include a check for zero velocity, in which case you should do nothing to maintain the last rotation.

Answer 2

第二个链接显示他们总是在一个方向上移动，而这恰恰是角色所面对的方向，基本上他们要做的就是使用玩家输入来旋转角色，并继续沿玩家的本地前进方向施加速度。