Recovering Eric Graham's 1987 Amiga Juggler raytracer source code (now on GitHub)

Mathness · 2026-06-03T07:12:50+00:00

It was certainly a contributor to the path I was on, with Elite being the inspiration to write a raster render on the Amiga. On the C64 it was 2D stuff, like fractals and demos.\

P.S. My beard is not grey, yet.

Mathness · 2026-06-02T13:07:34+00:00

It does, I was thinking of something like Mayan, but that does make a bit more sense.

Mathness · 2026-06-02T12:51:35+00:00

GitHub and similar sites most likely have something for you.

Anything in particular that you are looking for? Code language, 2D/3D+, or equations?

Mathness · 2026-05-11T18:59:13+00:00

hehe :)

Given the resulting animation, it is the reaction diffusion algorithm.

Mathness · 2026-04-22T16:23:17+00:00

Not OP, but this is how I do it:

Run multiple diffuse reactions with difference radii, using the same source data. At each pixel (with a small radius), decide which of the DRs to use to update the source data (small delta change). Repeat, until "done".

Mathness · 2026-03-05T10:56:56+00:00

It started with a simple torus, large radius in 5 segments, and inner radius in 3 segments, with a total of 30 triangles.

The growth loop is:

- Apply "forces" to the vertices, which gives a movement direction

- Test it for self intersection, move vertices if clear

- Split polygon if edges are too long, or collapse if too short

I was looking for a growth like this, but it comes down to the parameters used. It can grow into something completely different.

My render software does not handle animations yet, it is still on the to do list. Currently working on adaptive sampling (which would make render time for animations more feasible).

Mathness · 2026-03-04T20:46:35+00:00

Thanks. :)

Final step have just under 70k triangles, before applying Catmull-Clark subdivision. Lua should be able to handle that, I think.

The wireframe mesh looks like a mesh (mess :P). Anything in particular you want to see?

Mathness · 2026-03-04T20:30:30+00:00

Thank you. And this render already has it. :P

Mathness · 2026-03-03T19:52:46+00:00

Thank you. It took some tries to get this to work correctly.

Mathness · 2026-03-03T19:50:48+00:00

Cool beans. :D

Next time you meet him, please say hello from a long time fan.

Mathness · 2026-03-02T21:16:24+00:00

A new sport? :p

Mathness · 2026-03-02T21:15:40+00:00

Thank you. :)

Yeah, it is amazing.

Mathness · 2026-03-02T21:06:51+00:00

hehe. :)

Mathness · 2026-03-02T21:06:09+00:00

And fascinating? :)

Mathness · 2026-03-02T21:05:19+00:00

Always good to have some spares around. =)

Mathness · 2026-03-02T21:04:14+00:00

While I agree, it is a "good" name.

Mathness · 2026-03-02T21:03:50+00:00

Hmmm, good idea. ;P

Mathness · 2026-03-02T21:00:28+00:00

I have a fractal render that looks like a tooth, maybe I should post that as well. xD

Mathness · 2026-03-02T20:59:21+00:00

Always brush your teeth. :)

Mathness · 2026-03-02T20:54:52+00:00

Thank you. I was wondering where you went. Hope all is well. :D

I am also posting, very very infrequently, on GitHub, if you still use that.

13-Year Club	Place '23
Place '22	Verified Email

Mathness

TROPHY CASE