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I made https://mandeljs.hgreer.com https://mandeljs.hgreer.com The real glory of it is the math – it’s using Webassembly to calculate the reference orbit, and

I made https://mandeljs.hgreer.com https://mandeljs.hgreer.com The real glory of it is the math – it’s using Webassembly to calculate the reference orbit, and then the GPU to calculate all the pixels, but with an enormous amount of fussing to get around the fact that shaders only have 32 bit floats. The interface works on mobile and desktop, but if you have any tips on how to polish it, let me know.

mg 2y ago
Hey, this is pretty cool! Have you considered publishing it under an open source license? Then I could see myself working on some features like: Selectable color palette, drag&drop and pinch-to-zoom on mobile and fractional rendering (so that when you move the position, only the new pixels get calculated).
- QuadmasterXLII 2y ago
  https://github.com/HastingsGreer/mandeljs https://github.com/HastingsGreer/mandeljs i’ll whack a license on it later today
morphle 2y ago
You could polish it by using variable size precision floats or at least quadruple size 128 bit floating point. This requires you to create a programming language compiler or use my parallel Squeak programming language (it is portable) and have that run on Webassembly or WebGL. It would be easier to have it run directly on CPU, GPU and Neural Engine hardware. The cheapest hardware today would be the M4 Mac mini or design your own chips (see my other post in this thread). An example of this polished solution is [1] but this example does not yet use high precision floating point [2]. [1] https://tinlizzie.org/~ohshima/shadama2/ https://tinlizzie.org/~ohshima/shadama2/ [2] https://github.com/yoshikiohshima/Shadama https://github.com/yoshikiohshima/Shadama
- QuadmasterXLII 2y ago
  This is already implemented in it- I just did it in pen and paper and directly wrote the shader from my results instead of writing a language first. https://www.hgreer.com/JavascriptMandelbrot/#an_ugly_hack_the_cool_kids_love_ugly_hacks https://www.hgreer.com/JavascriptMandelbrot/#an_ugly_hack_th...
dspillett 2y ago
> to get around the fact that shaders only have 32 bit floats I wonder if there are places around the set where rounding through the iterations depending on the number format chosen, materially affects the shape (rather than just changing many pixels a bit so some smoothness or definition is lost).
- fanf2 2y ago
  You get effects somewhat like that from perturbation theory glitches, as discussed in the article.

mg 2y ago

Hey, this is pretty cool! Have you considered publishing it under an open source license? Then I could see myself working on some features like: Selectable color palette, drag&drop and pinch-to-zoom on mobile and fractional rendering (so that when you move the position, only the new pixels get calculated).

QuadmasterXLII 2y ago
https://github.com/HastingsGreer/mandeljs https://github.com/HastingsGreer/mandeljs i’ll whack a license on it later today

morphle 2y ago

You could polish it by using variable size precision floats or at least quadruple size 128 bit floating point. This requires you to create a programming language compiler or use my parallel Squeak programming language (it is portable) and have that run on Webassembly or WebGL. It would be easier to have it run directly on CPU, GPU and Neural Engine hardware. The cheapest hardware today would be the M4 Mac mini or design your own chips (see my other post in this thread). An example of this polished solution is [1] but this example does not yet use high precision floating point [2]. [1] https://tinlizzie.org/~ohshima/shadama2/ https://tinlizzie.org/~ohshima/shadama2/ [2] https://github.com/yoshikiohshima/Shadama https://github.com/yoshikiohshima/Shadama

QuadmasterXLII 2y ago
This is already implemented in it- I just did it in pen and paper and directly wrote the shader from my results instead of writing a language first. https://www.hgreer.com/JavascriptMandelbrot/#an_ugly_hack_the_cool_kids_love_ugly_hacks https://www.hgreer.com/JavascriptMandelbrot/#an_ugly_hack_th...

dspillett 2y ago

> to get around the fact that shaders only have 32 bit floats I wonder if there are places around the set where rounding through the iterations depending on the number format chosen, materially affects the shape (rather than just changing many pixels a bit so some smoothness or definition is lost).

fanf2 2y ago
You get effects somewhat like that from perturbation theory glitches, as discussed in the article.