Hacker News
- Ray-Casting Tutorial for Game Development and Other Purposes (1996) http://permadi.com/1996/05/ray-casting-tutorial-table-of-contents/ 7 comments
- Decimal to Hexadecimal https://www.permadi.com/tutorial/numDecToHex/ 6 comments learnprogramming
- Help with understanding ray-casting. http://www.permadi.com/tutorial/raycast/ 10 comments gamedev
- Old link, but it seems it wasn't submitted before: Order emerging from chaos (Java needed) http://www.permadi.com/java/cautom/index.html 15 comments math