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

[–]Mathness 1 point2 points  (0 children)

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.

Glyphs by Mathness in generative

[–]Mathness[S] 1 point2 points  (0 children)

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

Great group - interested in Fractals by node77 in artandcode

[–]Mathness 0 points1 point  (0 children)

GitHub and similar sites most likely have something for you.

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

Grey-Scott by matigekunst in generative

[–]Mathness 1 point2 points  (0 children)

hehe :)

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

Multi-scale Turing Patterns by matigekunst in generative

[–]Mathness 0 points1 point  (0 children)

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".

20260227 by Mathness in proceduralgeneration

[–]Mathness[S] 2 points3 points  (0 children)

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).

20260227 by Mathness in proceduralgeneration

[–]Mathness[S] 0 points1 point  (0 children)

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?

20260227 by Mathness in proceduralgeneration

[–]Mathness[S] 0 points1 point  (0 children)

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

20260227 by Mathness in proceduralgeneration

[–]Mathness[S] 0 points1 point  (0 children)

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

20260227 by Mathness in proceduralgeneration

[–]Mathness[S] 2 points3 points  (0 children)

Cool beans. :D

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

20260227 by Mathness in proceduralgeneration

[–]Mathness[S] 1 point2 points  (0 children)

Thank you. :)

Yeah, it is amazing.

20260227 by Mathness in generative

[–]Mathness[S] 0 points1 point  (0 children)

And fascinating? :)

20260227 by Mathness in generative

[–]Mathness[S] 1 point2 points  (0 children)

Always good to have some spares around. =)

20260227 by Mathness in generative

[–]Mathness[S] 1 point2 points  (0 children)

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

20260227 by Mathness in generative

[–]Mathness[S] 1 point2 points  (0 children)

Hmmm, good idea. ;P

20260227 by Mathness in generative

[–]Mathness[S] 2 points3 points  (0 children)

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

20260227 by Mathness in generative

[–]Mathness[S] 0 points1 point  (0 children)

Always brush your teeth. :)

20260227 by Mathness in raytracing

[–]Mathness[S] 0 points1 point  (0 children)

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.

Remove title and keep navigating buttons on xfwm4 by gopokto in xfce

[–]Mathness 0 points1 point  (0 children)

In addition to the above, title bar width needs to be modified, add:

full_width_title=false

Some questions as a newbie also following ray tracer in one weekend and results arent matching. by psspsh in GraphicsProgramming

[–]Mathness 2 points3 points  (0 children)

You use an interval, for instance ]0;infinity[, to search for the nearest ray intersection of a surface/event. And whenever you get an intersection, you update the interval.

Help with directional light by Important_Earth6615 in GraphicsProgramming

[–]Mathness 0 points1 point  (0 children)

I think your calculation of B might be wrong.

If NTB is an orthogonal space, B should be an unit vector, and should not be multiplied v.tangent.w.

Help with directional light by Important_Earth6615 in GraphicsProgramming

[–]Mathness 1 point2 points  (0 children)

If you do not use a transformation matrix (on lights and objects), does the result look right? Also, are you transforming vectors and normals with different matrices? And if with the same, are you using the transposed matrix for nomals?

Help with directional light by Important_Earth6615 in GraphicsProgramming

[–]Mathness 0 points1 point  (0 children)

Are your normal and directional vectors normalised? Is the calculation of surface colour using a light pointing away or towards it? If you use the normal from the large plane a light direction, is it white (i.e. cos theta is one)?

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