New sphere tree

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Offline 3DickUlus

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« Reply #60 on: June 16, 2020, 04:15:43 AM »
...watch out frr dah wabbit holes  ..  nice one :thumbs_up:   ( off topic :P I think we need a more varied smiley collection, maybe some cool fractal avatars too. )

Offline Sabine62

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« Reply #61 on: June 16, 2020, 09:34:33 AM »
Ohh wow those asparagus trees are cool, Graeme! :thumbs: :yes:
And yes, Dick, we need an updated and extended smiley collection... I can rummage on DA and try and get some people to 'donate' theirs for the fractal cause? :}
Not too sure about fractal avatars and how to get them, but hey, seems a great theme for the fractal image contest...  O:-)
To thine own self be true

Offline mclarekin

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« Reply #62 on: June 20, 2020, 09:22:56 AM »
@sabine preset app is the gasket

frag has std color commented out, color  function used is for preset con

added scaleP

Offline Sabine62

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« Reply #63 on: June 20, 2020, 11:44:24 AM »
Thank you, Graeme!  :joy:
... and another cool shape! :thumbs:

Offline mclarekin

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« Reply #64 on: June 21, 2020, 02:01:42 PM »
just for fun. camera to surface 1e-13, lost the mini bulbs only due to limit of double precision, DE is really good

Offline mclarekin

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« Reply #65 on: June 21, 2020, 03:16:31 PM »
clean cut

Offline Sabine62

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« Reply #66 on: June 21, 2020, 05:42:23 PM »
Really cool!!! :thumbs:

Offline TGlad

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« Reply #67 on: June 25, 2020, 12:47:22 AM »
Here's a slice I made of the sphere tree, it's a bit different to yours @Mclarekin, so I imagine you are showing a modified version.

Offline mclarekin

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« Reply #68 on: June 25, 2020, 09:41:02 AM »
@ tglad, i think i was just penny-pinching on the cost of iterations :) i see i had only used two  :)

BTW. original spheretree  is in soon to be released Mandelbulber V2.22. Spheretree V2 with more transforms will be in the V2.23.

Offline TGlad

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« Reply #69 on: June 29, 2020, 12:54:05 PM »
That's awesome, I can't wait to try it out within Mandelbulber.  :thumbs: :thumbs: :thumbs:

By the way, I attached a frag with what seems to be a bit better DE to me. The 0.4 sphere causes a problem when the loop early outs, so I put it back to 0.5. And now I don't seem to need the sqrt() sublinear mapping. And I also changed scale=0.45 up to scale=1.0 and left that to the fudgeFactor, which works as about 0.8.

Offline C0ryMcG

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« Reply #70 on: June 30, 2020, 02:57:54 AM »
I've been trying to play along with this system, but I can't seem to replicate it.. I'm just using 2d rendering, but I figured if I set y=0, the calculations would return a slice through the axis (correct me if I'm wrong about that)

I'll attach an orbit trap render, since it has the most data in it compared to other methods I've tried. I see that it is supposed to just do a distance estimate at the end of iteration and then return that, which is interpreted as "inside" or "outside", I think depending if distance is > or < 0? But all I get is a crescent moon shape when I try that.

Anything obvious that I might be missing?

Offline TGlad

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« Reply #71 on: June 30, 2020, 06:59:49 AM »
Do you want to post your code and we can have a look.

It doesn't look far off.

Offline mclarekin

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« Reply #72 on: June 30, 2020, 12:30:09 PM »
Quote
I put it back to 0.5. And now I don't seem to need the sqrt() sublinear mapping

I was going to test the 0.4 to 0.5 but forgot :embarrass:

Initial testing, zooming into default settings spheretree,  DE is improved :thumbs:

I will test varing parameters and option sometime :)


Offline C0ryMcG

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« Reply #73 on: July 02, 2020, 02:07:50 AM »
It works! I decided to go over my code and clean it up, make sure I wasn't making any obvious, embarasing errors before I posted it for the world to see.. And I found a few places where I'd either mistranslated the original Frag code, or simplified too ambitiously and introduced errors that way. And once I fixed those it started looking very close, so I kept hammering at it.

My results aren't exactly the same (for example, the shapes rendered are not circles, but something that looks a bit like hyperbolic polygons), and it doesn't reject the 'outside' areas, so there's a lot of reflections and whatnot, but that gives me more freedom to use this formula with different coloring methods.

Here's the result, with Lagrangian Descriptors, and one with a circle-shaped orbit trap.

Offline mclarekin

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« Reply #74 on: July 02, 2020, 02:30:30 AM »
@COryMcG  cool!


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