30fps.net
Computer Graphics & Programming with Pekka Väänänen
Welcome to Pekka's fascinating graphics coding and hobbyist programming website.
Professionally, I am a software engineer. I've worked with virtual reality tech, 3D scanning, mesh optimization, and 2D display drivers. On this site I try to explain niche technical subjects in clear language.
The below entries marked with a ⭐ are what I'm most proud of and recommend exploring first.
Explainers:- Palette lighting tricks on the Nintendo 64 May 17th, 2025
- Portal flow brings it all together January 18th, 2025
- Fine visibility via clipping January 10th, 2025
- Coarse base visibility January 10th, 2025
- Portals and Quake ⭐ January 10th, 2025
- A simple way to scale pixel art games November 27th, 2024
- How to present MS-DOS screenshots November 15th, 2024
- How Westwood VQA works November 14th, 2024
- Classic 3D videogame shadow techniques ⭐ October 25th, 2024
- Shader post-processing in a hurry ⭐ April 6th, 2024
- Clean pointer serialization in C January 21st, 2024
- Sort a sphere BVH with split planes January 10th, 2024
- Annoying details of a Z-buffer rasterizer January 4th, 2024
- Going up in color bit depth ⭐ November 8th, 2023
- In-place filtering of an array March 22nd, 2023
- BSP Lessons March 7th, 2023
- Full screen triangle optimization ⭐ February 27th, 2023
Notebooks:
- Efficiently split a NumPy array into tiles November 7th, 2024
- Moving basis decomposition for images March 16th, 2024
- Color quantization with a self-organizing map March 8th, 2024
- PCA image color compression experiment March 5th, 2024
- Image vector quantization is just like creating a tilemap ⭐ April 30th, 2023
My postmortems of some demoscene productions elsewhere on the web:
- Rendering "A New World Awaits" (2021) ⭐
- Rendering "Eternal Fortress" (2020)
- How a 64k intro is made (2017)
Other resources:
- I've compiled a table of 3D software coordinate systems.
You can follow me on Mastodon, Bluesky, YouTube, or subscribe to an Atom feed.