[chimera-dev] Accessing rotation matrix of molecule models

Hello, Is there a way to access the rotation matrix of the molecular models? I'm interested in comparing/aligning two structures and I would like the user to rotate the models until they think it looks good. Then I want to compute the distance between the atoms, but I'd need to know what they're coordinates are in the same space. So is there a way to get the rotation matrix? Along with that, is there then a way to set the rotation matrix for a model? Thanks, Mike