How to set object' orientations?

[dexin-wang]

I noticed that the OnTop and Inside functions sample the object rotation based on the object's orientations, and orientations are all empty lists.
I want to sample the x or y axis rotation when setting the OnTop and Inside states of the object. Is this possible?
I currently think of an indirect method, which is to rotate the object along the x and y axes after setting the OnTop state, and adjust the object's z coordinate based on the aabb before and after.
But is there a more direct way?
Thank you very much.