如何在 Y 轴上向左或向右旋转 90 度？

Question

我创建了这段代码，但它不起作用，我不明白为什么。在 Debug.Log 中，一切似乎都很好，但 while 循环永远是正确的。有没有更好的方法将游戏对象左右旋转 90 度？

https://www.youtube.com/watch?v=7skGYYDrVQY

 //Public
 public float rotateSpeed = 150f;
 public bool isMoving = false;

 //Private
 private Rigidbody myRigidbody;


 void Start () {

     myRigidbody = GetComponent<Rigidbody> ();
 }

 void Update() {

     Quaternion originalRotation = this.transform.rotation;

     if (!isMoving) {


         if (Input.GetButtonDown ("PlayerRotateRight")) {

             //Rotate Right
             StartCoroutine (PlayerRotateRight (originalRotation));

         } else if (Input.GetButtonDown ("PlayerRotateLeft")) {

             //Rotate Left
             StartCoroutine (PlayerRotateLeft (originalRotation));
         }
     }

 }

 IEnumerator PlayerRotateRight(Quaternion originalRotation) {

     Quaternion targetRotation = originalRotation;
     targetRotation *= Quaternion.AngleAxis (90, Vector3.up);

     while (this.transform.rotation.y != targetRotation.y) {

         Debug.Log ("Current: " + this.transform.rotation.y);
         Debug.Log ("Target: " + targetRotation.y);

         isMoving = true;
         transform.rotation = Quaternion.RotateTowards (transform.rotation, targetRotation, rotateSpeed * Time.deltaTime);
         yield return null;
     }

     isMoving = false;
 }

 IEnumerator PlayerRotateLeft(Quaternion originalRotation) {

     Quaternion targetRotation = originalRotation;
     targetRotation *= Quaternion.AngleAxis (90, Vector3.down);

     while (this.transform.rotation.y != targetRotation.y) {

         Debug.Log ("Current: " + this.transform.rotation.y);
         Debug.Log ("Target: " + targetRotation.y);

         isMoving = true;
         transform.rotation = Quaternion.RotateTowards (transform.rotation, targetRotation, rotateSpeed * Time.deltaTime);
         yield return null;
     }

     isMoving = false;
 }

Answer 1

    if (Input.GetKeyDown (KeyCode.A)) {
        transform.Rotate (0, -90, 0, Space.World);


    }else if(Input.GetKeyDown(KeyCode.D)){
        transform.Rotate(0,90,0, Space.World);
    }

根据您的说法，像这样简单的事情应该可以正常工作。你选择做这么复杂的任何特殊原因？在这种情况下，我可以修改答案以适合您的代码。

Answer 2

您正在比较四元数而不是欧拉角。而且最好有一个阈值，因为您要比较两个floats。

改变一下

while (this.transform.rotation.y != targetRotation.y)

到

while (this.transform.eulerAngles.y != targetRotation.eulerAngles.y)

或

while (Mathf.Abs(this.transform.eulerAngles.y - targetRotation.eulerAngles.y) > THRESHOLD)

其中THRESHOLD 是一个足够小的常数。还要在循环之后将旋转设置为精确的角度，以防止旋转错误。