How to rotate a game object around world axes with Quaternion.slerp?

Getting Started
1

So, i’m trying to rotate an object 90° around a world axis with the help of Quaternion.Slerp to make it smooth.
I’ve can do the rotation with code like this: transform.Rotate(-90, 0, 0, Space.World);The problem with this is that it snaps to the rotation. So i tried with this code below to smooth it out, but it doesn’t work. It rotates around its own axis like, if i used Space.Self instead to Space.World.

float elapsedTime = 0.0f;
        do
        {
            transform.localRotation = Quaternion.Slerp(m_startRotation, m_gravityRotation, elapsedTime / rotationDuration);
            elapsedTime += Time.deltaTime;
            yield return null;
        } while (elapsedTime <= rotationDuration);

I know that it can be coded manualy, but i really want to know if there is an easy solution to this problem.

2

Easiest way to do this would be using Transform.Rotate in your coroutine loop, something like:

            float elapsedTime = 0.0f;
            do
            {
                transform.Rotate(-90*Time.deltaTime/rotationDuration, 0, 0, Space.World);
                elapsedTime += Time.deltaTime;
                yield return null;
            } while (elapsedTime <= rotationDuration);

You could also do it with Quaternion.Slerp if you assign to .rotation rather than to .localRotation. But it doesn’t seem as simple or clear to me.

3

I’ve tried before with .rotation and it gave me tha same problem. I’m gonna try with what you are telling me.