Question

似乎没有任何效果，玩了几个小时，复制并粘贴了解决方案＆＃39;来自谷歌但没有更改maxSpeed变量不会做任何事情。物体仍然像巴里艾伦一样飞过屏幕。

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

public class PlayerMovement : MonoBehaviour 
{

    [Range (0, 5)]public int speed;
    public Rigidbody2D rb2D;
    public Vector3 veloc;
    public float maxSpeed;

    void Start () 
    {
        rb2D = GetComponent<Rigidbody2D> ();
        speed = 4;
        maxSpeed = 0.01f;
        veloc = GetComponent <Rigidbody2D>().velocity;
    }

    void Update () 
    {
        if(Input.GetKey(KeyCode.W))
        {
            rb2D.AddForce (Vector3.up * speed);
        }
        if(Input.GetKey(KeyCode.S))
        {
            rb2D.AddForce (-Vector3.up * speed);
        }
        if(Input.GetKey(KeyCode.D))
        {
            rb2D.AddForce (Vector3.right * speed);
        }
        if(Input.GetKey(KeyCode.A))
        {
            rb2D.AddForce (-Vector3.right * speed);
        }
    }
    void FixedUpdate ()
    {
        if(veloc.magnitude > maxSpeed)
        {
            rb2D.velocity = rb2D.velocity.normalized * maxSpeed;
        }
    }
}

Answer 1

我需要多睡一觉。如果遇到类似问题，只需将Fixedoc.magnitude更改为FixedUpdate方法中的rb2D.velocity.magnitude。该对象确实“口吃”。达到最大速度但我还没有找到解决方案。

 void Start () 
    {
        rb2D = GetComponent<Rigidbody2D> ();
        speed = 4;
        maxSpeed = 0.01f;
    }

    void Update () 
    {
        if(Input.GetKey(KeyCode.W))
        {
            rb2D.AddForce (Vector3.up * speed);
        }
        if(Input.GetKey(KeyCode.S))
        {
            rb2D.AddForce (-Vector3.up * speed);
        }
        if(Input.GetKey(KeyCode.D))
        {
            rb2D.AddForce (Vector3.right * speed);
        }
        if(Input.GetKey(KeyCode.A))
        {
            rb2D.AddForce (-Vector3.right * speed);
        }
    }

    void FixedUpdate ()
    {
        if(rb2D.velocity.magnitude > maxSpeed)
        {
            rb2D.velocity = rb2D.velocity.normalized * maxSpeed;
        }
    }
}

Answer 2

仅此：

void Update() {
rb2D.velocity = Vector3.ClampMagnitude(rb2D.velocity, maxSpeed);
}

如何在Unity中设置刚体的最大速度？

2 个答案: