Question

if(objectsToRotate[i].tag == "RotateAutomatic")
            {
                if (a_Speed == 100)
                    a_Speed -= 1;

                a_Speed += 1;

                objectsToRotate[i].transform.Rotate(new Vector3(0, 1, 0) * Time.deltaTime * a_Speed, Space.World);
            }

我希望第一次运行游戏时，一旦速度为100，对象的速度将增加到100；一旦速度为0，则将速度减小到0；再次增加到100，以此类推，在100到0之间。

Answer 1

基于我所看到的代码，最少的代码解决方案应该是简单地引入一个布尔触发器，当达到某些值时可以进行切换：

private bool _shouldIncrease = true;

YourFunction() {
    if (objectsToRotate[i].tag == "RotateAutomatic")
    {
        if (a_Speed >= 100)
            _shouldIncrease = false;

        if (a_Speed <= 1)
            _shouldIncrease = true;

        a_Speed += _shouldIncrease ? 1 : -1;

        objectsToRotate[i].transform.Rotate(new Vector3(0, 1, 0) * Time.deltaTime * a_Speed, Space.World);
    }
}

Answer 2

using UnityEngine;
public class RotatesCollection : MonoBehaviour
{

    [SerializeField] Transform[] _objectsToRotateManual;
    [SerializeField] Transform[] _objectsToRotateAutomatic;
    int _value = 0;
    int _valueDelta = 1;

    void Update ()
    {
        float deltaTime = Time.deltaTime;
        foreach( Transform rotor in _objectsToRotateAutomatic )
        {
            //step:
            _value += _valueDelta;

            //reverse step direction when min/max value is met:
            if( _value==0 || _value==100 ) { _valueDelta *= -1; }

            //rotate:
            rotor.Rotate(
                Vector3.up ,
                deltaTime * _value ,
                Space.World
            );
        }
    }

}

Answer 3

您也可以使用动画曲线。这样，速度控制将更易于更改和调整：

using UnityEngine;
public class RotatesCollection : MonoBehaviour
{

    [SerializeField] AnimationCurve _speedAnimation = AnimationCurve.Linear( 0f , 0f , 4f , 100f );

    [SerializeField] Transform[] _objectsToRotate;

    float _timeEnabled;

    void OnEnable ()
    {
        //get time when enabled:
        _timeEnabled = Time.time;

        //change default wrap mode to loop:
        if( _speedAnimation.postWrapMode == WrapMode.Clamp )
        {
            _speedAnimation.postWrapMode = WrapMode.Loop;
        }
    }

    void Update ()
    {
        float deltaTime = Time.deltaTime;
        float timeSinceEnabled = Time.time - _timeEnabled;
        foreach( Transform rotor in _objectsToRotate )
        {
            //get speed from curve:
            float speed = _speedAnimation.Evaluate( timeSinceEnabled );

            //rotate:
            rotor.Rotate(
                Vector3.up ,
                deltaTime * speed ,
                Space.World
            );
        }
    }

}

如何根据达到的转速值决定何时降低转速以及何时提高转速？

3 个答案: