c# - 变量设置行会干扰顶级语句

Question

我不知道这个脚本有什么问题。我尝试将所有变量放入“void Start()”中，但没有任何效果。请帮忙。 据我所知，更新脚本中的所有内容都不是问题。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MovementScript : MonoBehaviour{ }

{
    Rigidbody PlayerCube;
    float Jump = 1;
    float Speed = 1;
    void Update()
    {
        // All of this has the controls tilted 45 degrees. Deal with it for now.
        if (Input.GetKey(KeyCode.W)) ;
        { PlayerCube.AddForce(0, 0, Speed * 5); }

        if (Input.GetKey(KeyCode.S)) ;
        { PlayerCube.AddForce(0, 0, Speed * -5); }

        if (Input.GetKey(KeyCode.A)) ;
        { PlayerCube.AddForce(Speed * 5, 0, 0); }

        if (Input.GetKey(KeyCode.D)) ;
        { PlayerCube.AddForce(Speed * -5, 0, 0); }

        if (Input.GetKeyDown(KeyCode.Space)) ;
        { PlayerCube.AddForce(0, (float)(Jump * 2.5), 0); }
    }
}

Answer 1

• 删除MonoBehaviour后面的一对括号{ }
• 删除每个 if 语句后的分号 ;

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MovementScript : MonoBehaviour
{
    Rigidbody PlayerCube;
    float Jump = 1;
    float Speed = 1;

    void Update()
    {
        // All of this has the controls tilted 45 degrees. Deal with it for now.
        if (Input.GetKey(KeyCode.W))
        { PlayerCube.AddForce(0, 0, Speed * 5); }

        if (Input.GetKey(KeyCode.S))
        { PlayerCube.AddForce(0, 0, Speed * -5); }

        if (Input.GetKey(KeyCode.A))
        { PlayerCube.AddForce(Speed * 5, 0, 0); }

        if (Input.GetKey(KeyCode.D))
        { PlayerCube.AddForce(Speed * -5, 0, 0); }

        if (Input.GetKeyDown(KeyCode.Space))
        { PlayerCube.AddForce(0, (float)(Jump * 2.5), 0); }
    }
}

---

为了简单起见，修改您的 Update() 方法

void Update()
{
    PlayerCube.AddForce(-Speed * 5 * Input.GetAxisRaw("Vertical"), 0, Speed * 5 * Input.GetAxisRaw("Horizontal"));

    if (Input.GetKeyDown(KeyCode.Space))
    {
        PlayerCube.AddForce(0, (float)(Jump * 2.5), 0);
    }
}