First of all Thank you for your reply, my question is do not know how to ask you a question, I think my task now is to find some books to read to understand some basic concepts. I am wondering is how to organize an engine, that is what the engine contains the units to complete its work, through these days, learned from the books it contains rendering, math modules, models, etc., at this point you can What suggestions do to me.

i am sorry for my poor English.

Once again, thank you very much.