TI-89 Height-Mapped Raycaster (opens in new tab)

I have been working on a ray-caster for the NES [1].

Ray casters are fun because they aren't that computationally expensive, so it can be a fun way to bolt on 3D to a system that really doesn't support it.

[1] https://youtu.be/2wPT_UD6Ptc I'm still learning how to program for the NES so it's super buggy. I was trying to do the thing that Elite does by having a bunch of different lines as sprites and using that to represent vectors with... interesting results.

I love raycasters! This is great, thanks for sharing. I noticed the “fisheye” effect, was the cosine correction too expensive an operation given the hardware limitations?

Man, this brings me back. I spent way too many hours in high school trying to get Doom‑like effects working on my TI‑89. The fact that you pulled off a height‑mapped raycaster on that hardware is seriously impressive. Did you have to do any crazy memory tricks? I remember the CPU was slow, but the screen was decent for its time. Would love to see a video of this in action!

As you seem to be the author: will this run on a voyage 200? Also: very impressive.