This tutorial describes a good method called SAT(Separating Axis Theorem)...
http://www.harveycartel.org/metanet/tutorials/tutorialA.html
It also have a lot of small interactive flash-apps to explain certain things visually.
http://www.harveycartel.org/metanet/tutorials/tutorialA.html
It also have a lot of small interactive flash-apps to explain certain things visually.