如何为对象旋转设置2个限制? [英] How to set 2 limits to the rotation of an object?

问题描述

当按住D向上和W向下但要限制两个方向的旋转时，我需要使对象在z轴上旋转，使用下面提供的代码，我设法使对象在按下时旋转，但是达到我的变量设置的2个限制中的任何一个时，都不要停止旋转.

I need to make the object rotate in the z axis when holding D to go up and W to go down but limit the rotation in both directions, with the code provided below i managed to make the object rotate when pressed but it does´t stop rotating when hit any of the 2 limits set with my variables.

我是编码领域的新手，希望您能帮助我解决和理解我的问题.谢谢您的宝贵时间.

I am new in the world of coding, hopefully you can help me to solve and understand my problem. Thank you for your time in advance.

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

public class GyroDiscControls : MonoBehaviour{

public GameObject AltNeedleBright;
public float MaxAltNeedleRotation = -65f;
public float MinAltNeedleRotation = 135f ;
public void update (){

if (Input.GetAxisRaw("Vertical") > 0 & 
AltNeedleBright.transform.rotation.z > MaxAltNeedleRotation)
    {
        AltNeedleBright.transform.Rotate(0f, 0f, +15f * Time.deltaTime);
    }
if (Input.GetAxisRaw("Vertical") < 0 & 
AltNeedleBright.transform.rotation.z < MinAltNeedleRotation)
    {
        AltNeedleBright.transform.Rotate(0f, 0f, -15f * Time.deltaTime);
    }

}

推荐答案

首先，您要处理

First of all you are dealing with Quaternion. Quaternion has 4 components x, y, z and w and does not behave like you expect it here - never change or check a rotation.z value directly.

第二个错误:默认情况下， transform.Rotate 会在本地空间中进行旋转.因此，无论如何检查 transform.rotation 都是错误的..如果应该是 transform.localRotation .

The second mistake: transform.Rotate by default does the rotation in local Space .. so checking transform.rotation is wrong anywway .. if something it should be transform.localRotation.

然后，您实际要检查的值是 transform.localEulerAngles 或 eulerAngles

Then the value you actually wanted to check is the transform.localEulerAngles or eulerAngles.

一种简单的替代方法是存储已旋转的值并钳制在该值上:

A simple alternative would be to store the already rotated value and clamp on that instead:

// Your naming is very confusing ... Min should be the smaller value
public float MaxAltNeedleRotation = 135f;
public float MinAltNeedleRotation = -65f;

private float alreadyRotated = 0;

public void update ()
{ 
    var direction = 0;

    // use && here .. you don't want to do a bitwise & on bools
    if (Input.GetAxisRaw("Vertical") > 0 && alreadyRotated < MaxAltNeedleRotation)
    {
        direction = 1;
    }
    // use else if since anyway only one of the cases can be true
    else if (Input.GetAxisRaw("Vertical") < 0 && alreadyRotated > MinAltNeedleRotation)
    {
        direction = -1;
    }

    // use the rotation and riection
    // but clamp it so it can minimum be MinAltNeedleRotation - alreadyRotated
    // and maximum MaxAltNeedleRotation - alreadyRotated
    var rotation = Mathf.Clamp(direction * 15f * Time.deltaTime, MinAltNeedleRotation - alreadyRotated, MaxAltNeedleRotation - alreadyRotated);

    if(rotation != 0)
    {
        AltNeedleBright.transform.Rotate(Vector3.forward * rotation);

        // update the alreadyRotated value
        alreadyRotated += rotation;
    }
}

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