Unity-为什么在 X 轴上移动对象时 Z 轴会发生变化？

Question

I am creating a game in which I will be a cube. But when I move my cube on X axis the Z axis changes. I've also blocked the X, Y, Z rotation.

My code:

using UnityEngine;
using System.Collections;

public class CubeControl : MonoBehaviour {
    private Vector3 input;

    void Update () {
        if(Input.GetKey(KeyCode.D)){
            input = new Vector3(25, 0, 0);
            rigidbody.AddForce(input);
        }
        if(Input.GetKey(KeyCode.A)){
            input = new Vector3(-25, 0, 0);
            rigidbody.AddForce(input);
        }
        if(Input.GetKey(KeyCode.W)){
            input = new Vector3(0, 0, 25);
            rigidbody.AddForce(input);
        }
        if(Input.GetKey(KeyCode.S)){
            input = new Vector3(0, 0, -25);
            rigidbody.AddForce(input);
        }
    }
}

Answer 1

It looks like you're applying movement in world space. You likely want to apply it in object space. So you'll want to rotate the vector you generate by the objects transform. Something like:

Vector3 input = new Vector3(25,0,0);
input = this.transform.rotation * input;
rigidbody.AddForce(input);

Also, a couple of things to make your life easier:

• Look into the Input.GetAxis() stuff for doing input. Can ease your life for setting things up/configuring later.

• I like using Vector3.up/Vector3.left/Vector3.forward etc. and multiplying by a scalar. Makes things look more intuitive when wanting to multiply.