Rotate around a pivot to a specified degree and stop, with key press

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Ask a Question The form below has errors. Correct the fields in red and try again. avatar image Your Question: rotating an object around a pivot inside and stopping at a set degree

I've been struggling with this one all morning. I have a game I'm designing where the entire level can rotate on a set pivot. I am rotating the level because, not the camera, because gravity needs to remain unchanged. My script, when Q or E is hit, rotates the entire level. (Currently in the X/Y plane, rotating around the z)

I was able to get it working without a pivot (it would rotate around 0,0,0) In the interest of being able to have multiple rotation points as levels get bigger, i was adjusting my script. I am having trouble getting it to stop - I have tried a bunch of different ways: my current version is setting a vector at an angle equal to the desired rotation and then using vector3.dot to see if they line up as the script rotates it.

The rotation is also in a coroutine.

If you could please help me figure out how to get this while loop to recognize that the vectors have aligned, I woudl be very grateful

      [SerializeField] public GameObject level; // levels will change.
     [SerializeField] private float rotationDegree = 90f; // how far you want the level to rotate. May need to be made public in order to change it for different levels.
     [SerializeField] private float rotateSpeed = 15f; // speed of the rotation
     
 private bool levelRotating = false,
 
 Quaternion toAngle, startAngle;
 private float startDegree;
 
 private Transform levelTrans;
     private Transform pivot;
 
     private void Awake()
     {
         levelTrans = level.transform; // shorthand for the transform of the level vrs the GO
 
         startAngle = Quaternion.identity; // Make sure the level startAngle is set to No Rotation to start.
 
         foreach(Transform child in levelTrans) 
         {
             // searches for each child in the Level for the pivot point on layer 9 (pivot layer) and then sets it for use later. Should only be one pivot per camera move.
 
             // Note: Camera Move script (to change levels/scenes) will need to re find pivot!!
             if(child.gameObject.layer == 9)
             {
                 pivot = child;
                 break;
             }
         }
         
     }
 
 
    private void LateUpdate()
     {
         if (!levelRotating)
         {
 
             startDegree = levelTrans.eulerAngles.z;
 
             if (Input.GetAxisRaw("Rotate") < 0)
             {
 
                 toAngle = Quaternion.AngleAxis(startDegree + rotationDegree, levelTrans.forward); // set the destination angle as an offset from the start angle
 
                 this.transform.SetParent(levelTrans); // adds the player object to the level, so it will rotate with the level and not get tossed out
                 rotatingClockwise = true; // set the direction flag
                 levelRotating = true; 
                 StartCoroutine(SpinLevel(rotateSpeed, Vector3.forward, pivot));
                 
             }
             else if (Input.GetAxisRaw("Rotate") > 0)
             {
                 toAngle = Quaternion.AngleAxis(startDegree + rotationDegree, -levelTrans.forward); 
                 this.transform.SetParent(levelTrans);
                 rotatingCounterClock = true;
                 levelRotating = true; 
                 StartCoroutine(SpinLevel(rotateSpeed, -Vector3.forward, pivot));
                 
             }
         } // else do nothing if the level is moving. No change in current location, no change in flags, no change in toAngle
     }
 
 
  private IEnumerator SpinLevel(float overTime, Vector3 rotDirection, Transform pivot)
     {
 
 
         Vector3 pivotPoint = pivot.position;
 
         Vector3 destination = FindEndRotation(rotationDegree);
         Vector3 start = startAngle.eulerAngles;
 
        
 
         float dotRotateCheck = 0.0f;
 
 
         // if they are different, rotate the level a small amount, and set the level rotating to True
 
         while (!Mathf.Approximately(dotRotateCheck,0.0f))
         {
                 
             levelRotating = true;
 
             levelTrans.RotateAround(pivotPoint, rotDirection, overTime * Time.deltaTime);
 
             dotRotateCheck = Vector3.Dot(levelTrans.transform.right, destination);
 
 
 
             yield return null; 
         }
 
 
             levelRotating = false;
 
             this.transform.parent = null;
             
         
     }
 
 
     private Vector3 FindEndRotation(float degree)
     {
         Vector3 end = new Vector3(0,0,0);
 
         float radians = degree * Mathf.Deg2Rad;
 
         end.x = Mathf.Cos(radians);
         end.y = Mathf.Sin(radians);
 
         
         return end;
     }

I've been struggling with this one all morning. I have a game I'm designing where the entire level can rotate on a set pivot. I am rotating the level because, not the camera, because gravity needs to remain unchanged. My script, when Q or E is hit, rotates the entire level. (Currently in the X/Y plane, rotating around the z)

I was able to get it working without a pivot (it would rotate around 0,0,0) In the interest of being able to have multiple rotation points as levels get bigger, i was adjusting my script. I am having trouble getting it to stop - I have tried a bunch of different ways: my current version is setting a vector at an angle equal to the desired rotation and then using vector3.dot to see if they line up as the script rotates it.

The rotation is also in a coroutine.

If you could please help me figure out how to get this while loop to recognize that the vectors have aligned, I woudl be very grateful

   [SerializeField] public GameObject level; // levels will change.
  [SerializeField] private float rotationDegree = 90f; // how far you want the level to rotate. May need to be made public in order to change it for different levels.
  [SerializeField] private float rotateSpeed = 15f; // speed of the rotation
  

private bool levelRotating = false,

Quaternion toAngle, startAngle; private float startDegree;

private Transform levelTrans; private Transform pivot;

  private void Awake()
  {
      levelTrans = level.transform; // shorthand for the transform of the level vrs the GO
 
      startAngle = Quaternion.identity; // Make sure the level startAngle is set to No Rotation to start.
 
      foreach(Transform child in levelTrans) 
      {
          // searches for each child in the Level for the pivot point on layer 9 (pivot layer) and then sets it for use later. Should only be one pivot per camera move.
 
          // Note: Camera Move script (to change levels/scenes) will need to re find pivot!!
          if(child.gameObject.layer == 9)
          {
              pivot = child;
              break;
          }
      }
      
  }
 
 
 private void LateUpdate()
  {
      if (!levelRotating)
      {
 
          startDegree = levelTrans.eulerAngles.z;
 
          if (Input.GetAxisRaw("Rotate") < 0)
          {
 
              toAngle = Quaternion.AngleAxis(startDegree + rotationDegree, levelTrans.forward); // set the destination angle as an offset from the start angle
 
              this.transform.SetParent(levelTrans); // adds the player object to the level, so it will rotate with the level and not get tossed out
              rotatingClockwise = true; // set the direction flag
              levelRotating = true; 
              StartCoroutine(SpinLevel(rotateSpeed, Vector3.forward, pivot));
              
          }
          else if (Input.GetAxisRaw("Rotate") > 0)
          {
              toAngle = Quaternion.AngleAxis(startDegree + rotationDegree, -levelTrans.forward); 
              this.transform.SetParent(levelTrans);
              rotatingCounterClock = true;
              levelRotating = true; 
              StartCoroutine(SpinLevel(rotateSpeed, -Vector3.forward, pivot));
              
          }
      } // else do nothing if the level is moving. No change in current location, no change in flags, no change in toAngle
  }
 
 

private IEnumerator SpinLevel(float overTime, Vector3 rotDirection, Transform pivot) {

      Vector3 pivotPoint = pivot.position;
 
      Vector3 destination = FindEndRotation(rotationDegree);
      Vector3 start = startAngle.eulerAngles;
 
     
 
      float dotRotateCheck = 0.0f;
 
 
      // if they are different, rotate the level a small amount, and set the level rotating to True
 
      while (!Mathf.Approximately(dotRotateCheck,0.0f))
      {
              
          levelRotating = true;
 
          levelTrans.RotateAround(pivotPoint, rotDirection, overTime * Time.deltaTime);
 
          dotRotateCheck = Vector3.Dot(levelTrans.transform.right, destination);
 
 
 
          yield return null; 
      }
 
 
          levelRotating = false;
 
          this.transform.parent = null;
          
      
  }
 
 
  private Vector3 FindEndRotation(float degree)
  {
      Vector3 end = new Vector3(0,0,0);
 
      float radians = degree * Mathf.Deg2Rad;
 
      end.x = Mathf.Cos(radians);
      end.y = Mathf.Sin(radians);
 
      
      return end;
  }

Thanks for any help you can provide

( ai also have tried using local forward z compared to rotation degrees, and vector3.angle to find the current angle in the loop until it reaches 0. I suspect that the issue is Float and Epsilon, but...