Rotating objects about a point

[josephredfern]

Hi Jeff,

Thank you for your reply.

I've ended up doing the following:

* Create a group
* Set center (not position) of group to rotation point
* Add objects to scene (viz.addChild), specifying position and setting parent to the newly created group

Setting the position of the group rather than the centre made the models be added relative to the new position -- unless I was missing something.