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From Allegro Wiki
Welcome to the game programming section. Here you'll find general articles talking about the concepts and tips that a game programmer uses on a daily basis.
Game Design & Concepts
Collision detection methods
- Sin & Cos: The Programmer's Pals!
- Math for Game Programmers
- Angles, how I hate them..., plus accompanying source code for Cupid SpeedHack entry
- ISOmetric Pixel Art Cheat Sheet, a visual tutorial on isometric math.