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Question by infilrtrator_55 · Oct 25, 2015 at 08:52 AM · c#rotationquaternion

Know when the object is rotated?

I'm using Quaternion.Slerp to rotate an object to face another object in the scene. I have some code to execute when the rotation is done. The problem is I cant figure out when the rotation is done, so I can call the required functions after that. I've tried comparing quaternions and the Y rotations of the objects in an if statement like this:

     if (transform.rotation.y == obj.transform.rotation.y)
     {
         //code here
     }

For now the required code gets executed in Upadate() while the object is rotating and it looks very unrealistic. Is there a way or function that lets you know when an object is rotated in a certain way??

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Answer by toromano · Oct 25, 2015 at 02:52 PM

You can not compare two float values with "==". Using a threshold value might be useful in that case:

 private bool isRotating = false;

 void Update()
 {
 float angle = Quaternion.Angle(transform.rotation, target.rotation);
 if (Mathf.Abs(angle) <.005f)
 {
 ısRotating = true;
 transform.rotation = Quaternion.Slerp(transform.rotation, target.rotation, Time.time * speed);
 }
 else
 {
 ısRotating = false;
 }
 
 }

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avatar image infilrtrator_55 · Oct 25, 2015 at 03:11 PM 0
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Worked perfectly! Thanks!

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