It was me. I saw your post from over at lobste.rs "what are you doing this week" [0]. I've had the tab open for a couple days and I thought people over here at HN would like it (and I was right).

Anyway, thanks for the resource. I'm sure people would be interested in the parent page, "Graphics Programming Virtual Meetup" as well:

https://gpvm-website.netlify.app/

[0] https://lobste.rs/s/dppelv/what_are_you_doing_this_week

The link just below the title indicates it was submitted by 'abetusk (https://news.ycombinator.com/user?id=abetusk).

It's non-trival though not that hard. Have you asked an LLM?

It depends on your needs

* You can compute a rectangle by expanding a line purpendicular to its direction

The problem with this is you'll get gaps between 2 lines if they are supposed to be connected. You can solve that by trying to connect the corners if the rectangles. Once you do this though you're no longer drawing rectangles. You might have to make a simple triangle rasterizer. Or a scanline rasterizer

* You can "drag a brush". You compute a single line, then at each pixel, draw a sprite/circle/rectangle around that pixel. That's slow because you'll draw every pixel more than once but it will work and might be fast enough

This has the issue with the ends will be different unless your brush is round. If that's ok then it works.

All of these are something you can ask Gemini, ChatGPT, Claude, and they'll spit out an exmaple in the language of your choice.

The bible of graphics programming, everything with software rendering,

"Computer Graphics: Principles and Practice"

https://www.informit.com/store/computer-graphics-principles-...

Yeah, it is a steep price as many academia books, maybe you can find it on a library nearby, as its first edition was in 1982.

Fast, thick lines, no gpu

Choose 2