Hi,
I realised that some people here use MathMod as inspiration.

So did I. I used Abderrahman Taha's code of his Infinity Fabric and ported it to
Povray SDL with a 'little' inspiration by Kurtz LePirate.

Infinity Fabric sounded a bit 'sober' so I called it Devil's RollerCoaster.

Background was generated using Chis Colefax' awe-inspiring GALAXY.INC.

Comments are welcome

Droj
https://droj.net/

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Attachments:
Download 'iso_devils_rollercoaster.png' (1635 KB)

Preview of image 'iso_devils_rollercoaster.png'

On 21/03/2025 02:04, Droj wrote:
> ...
> Comments are welcome
> 
> Droj
> https://droj.net/
Looks good enough - I like the idea of strange geometric phenomena in
space. Also going through your site I found this image. Could you share
the code, please - I want to animate it. Mandelbulbs are too frightening
for animation :).
--
YB

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Attachments:
Download 'demonheads2.png' (172 KB)

Preview of image 'demonheads2.png'

On 22/03/2025 12:12, yesbird wrote:

> Looks good enough - I like the idea of strange geometric phenomena in
> space. Also going through your site I found this image. Could you share
> the code, please - I want to animate it. Mandelbulbs are too frightening
> for animation :).

The code is an isosurface fond on MathMod software.
Translated in SDL :


—————————————————————————————————————————————————
#declare R = function { k*(x/(x*x+y*y+z*z)) }

#declare PSkeletalGraph = function { 
cos(x)+cos(y)+cos(z)+(51/100)*(cos(x)*cos(y)+cos(y)*cos(z)+cos(z)*cos(x))+(147/100) 
}

#declare InvertPSkeletalGraph = function {
  PSkeletalGraph(R(x,y,z),R(y,x,z),R(z,y,x))
  }

// --- Isosurface
#declare Fxyz = function (x,y,z) { InvertPSkeletalGraph(x,y,z) }

isosurface {
	function { Fxyz(x,y,z) }
	max_gradient 800 // 3500
	contained_by { box { -L, +L } }
	pigment { Yellow }
	}
—————————————————————————————————————————————————


Good luck

-- 
kurtz le pirate
compagnie de la banquise

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On 22/03/2025 20:12, kurtz le pirate wrote:
> The code is an isosurface fond on MathMod software.
> Translated in SDL :
> ... 
> 
> Good luck

Thanks, I will try it.
--
YB

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On 22/03/2025 20:12, kurtz le pirate wrote:
> The code is an isosurface fond on MathMod software.
> Translated in SDL :
> ..
> Good luck

I've rendered it ...
Sorry, but I mean fractal, found on the site, which image was attached.
--
YB

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yesbird <sya### [at] gmailcom> wrote:
> On 21/03/2025 02:04, Droj wrote:
> > ...
> > Comments are welcome
> >
> > Droj
> > https://droj.net/
> Looks good enough - I like the idea of strange geometric phenomena in
> space. Also going through your site I found this image. Could you share
> the code, please - I want to animate it. Mandelbulbs are too frightening
> for animation :).

Yikes!  That looks like a mutant tardigrade agglomerate from hell!

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yesbird <sya### [at] gmailcom> wrote:
> On 21/03/2025 02:04, Droj wrote:
> > ...
> > Comments are welcome
> >
> > Droj
> > https://droj.net/
> Looks good enough - I like the idea of strange geometric phenomena in
> space. Also going through your site I found this image. Could you share
> the code, please - I want to animate it. Mandelbulbs are too frightening
> for animation :).
> --
> YB

Hi yesbird,

thanks for you comment.
Sorry, but the image you posted was made with a little program called Quat 1.11
I found years ago (2002).
So no code available.
Droj
I agree to what you said about Mandelbulbs :))

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kurtz le pirate <kur### [at] freefr> wrote:
> On 22/03/2025 12:12, yesbird wrote:
>
> > Looks good enough - I like the idea of strange geometric phenomena in
> > space. Also going through your site I found this image. Could you share
> > the code, please - I want to animate it. Mandelbulbs are too frightening
> > for animation :).
>
> The code is an isosurface fond on MathMod software.
> Translated in SDL :
>
>

> #declare R = function { k*(x/(x*x+y*y+z*z)) }
>
> #declare PSkeletalGraph = function {
> cos(x)+cos(y)+cos(z)+(51/100)*(cos(x)*cos(y)+cos(y)*cos(z)+cos(z)*cos(x))+(147/100)
> }
>
> #declare InvertPSkeletalGraph = function {
>   PSkeletalGraph(R(x,y,z),R(y,x,z),R(z,y,x))
>   }
>
> // --- Isosurface
> #declare Fxyz = function (x,y,z) { InvertPSkeletalGraph(x,y,z) }
>
> isosurface {
>  function { Fxyz(x,y,z) }
>  max_gradient 800 // 3500
>  contained_by { box { -L, +L } }
>  pigment { Yellow }
>  }

>
>
> Good luck
>
> --
> kurtz le pirate
> compagnie de la banquise

Hi klp,

yeah, that's the code but yours is more elegant than mine.
Droj

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hi,

"Droj" <803### [at] drojde> wrote:
> ...
> Infinity Fabric sounded a bit 'sober' so I called it Devil's RollerCoaster.
> ...
> Comments are welcome

not possible to tell from the image, but could the curve actually be "travelled"
like a rollercoaster ?  in which case my comment is: please make an animation,
seen from a visitor "riding the car" perspective.


in another reply you wrote:
> ... that's the code but yours is more elegant than mine.

I hope you will not let such thoughts stop you from publishing some of your
L-System stuff, so I too can "draw" Koch curves </grin>.


regards, jr.

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"jr" <cre### [at] gmailcom> wrote:
> hi,
>
Hi jr,
>
> not possible to tell from the image, but could the curve actually be "travelled"
> like a rollercoaster ?  in which case my comment is: please make an animation,
> seen from a visitor "riding the car" perspective.
>

Gee, making an animation using this object is far beyond my humble capabilities.
You saw the code kurtz le pirate published - I was just happy that my version of
code worked properly.

> in another reply you wrote:
> > ... that's the code but yours is more elegant than mine.
>
> I hope you will not let such thoughts stop you from publishing some of your
> L-System stuff, so I too can "draw" Koch curves </grin>.

Sure will do. If you have any special requests let me know.

regards
Droj

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