Well, the cliche starting point for game development seems to be gamedev. There are a number of tutorials and articles to start from, there. It also has quite an active forum. There is also book, "Programming Linux Games" (I assume through Qt that you're using Linux), but I believe it costs money. A number of books, however, can be found on the internet, and that may be one of them.
There's also the "black art of game programming", a wiki with truly terrifying chapter titles. Here is a link to a particularly relevant chapter, though of course you can view the whole thing:
Chapter 2. (archive.org backup link)
Hope this helps,
- Agor
