As for the references, I got rid of all of them except for my two earlier papers that I’m reviewing. If there are missing references now, then anyone can look up the terms on Wikipedia until the cows come home.

Kylotan and Juliean have already given great advise.  They also have helped me several times when I have questions here.

I still want to add some more …

To handle child-parent transform, I use the similar approach as Ogre3D.  My gameplay has to be split into 3 phases :-