I never really know what’s a bug or what’s my misunderstanding but this is suspicious.

Imagine wanting to roll a ball. Simple - Empty and Sphere.

Sphere Copy Location targets the Empty but not Z-axis. Now to make it roll:

Transformation Constraint where Location of Empty’s Y triggers Sphere’s X-axis Rotation, and

Location of Empty’s X triggers Sphere’s Y-axis Rotation. World to World, surely.

Empty’s X makes the Sphere roll correctly but no matter what I have done, Empty’s Y LOC rotates the Sphere Local X

The local X keeps wobbling around since the sphere is rotating correctly on the Y. This should be easy, right?

Is this something to report or is it my mistake?

### Attachments

copy transform x yes y no.blend (516 KB)