How maps work

In this article, I will be trying to explain how maps in Quake-based engines work. Although I managed to read and create 3D geometry using Source Engine maps, my understanding of maths is very limited and I may not be able to explain everything perfectly.

Contents

• How are maps structured
• Entities
• Brushes
• Creating convex polygons using brush data
• Sorting vertices
• Calculating texture coordinates
• Creating a map file compatible with Call of Duty's level editor
• Tradeoffs
• Sources