So here is the same isosurface, with the opposite end sliced off this time.

This one took over 9.5 hours to render instead of 8. But hey, I guess 
I'm the only person who finds any of this exciting, so maybe I'll stop 
posting...

Andrew @ home.

Post a reply to this message

Attachments:
Download 'quadratic-julibrot-12-final.jpg' (85 KB) Download 'us-ascii' (37 KB)

Preview of image 'quadratic-julibrot-12-final.jpg'

oooooohhh pretty.....

G.

"Andrew C on Mozilla" <voi### [at] devnull> wrote in message
news:40f8e25a@news.povray.org...
> So here is the same isosurface, with the opposite end sliced off this
time.
>
> This one took over 9.5 hours to render instead of 8. But hey, I guess
> I'm the only person who finds any of this exciting, so maybe I'll stop
> posting...
>
> Andrew @ home.
>


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> Redirecting Options
>   All Streams to console..........On   and file Quadratic-Julibrot-12.txt
>   Debug Stream to console.........On
>   Fatal Stream to console.........On
>   Render Stream to console........On
>   Statistics Stream to console....On
>   Warning Stream to console.......On
> Parsing Options
>   Input file: D:\Orphi\POVRay\CubicMandelbrot\Quadratic-Julibrot-12.pov
(compatible to version 3.60)
>   Remove bounds........On
>   Split unions.........Off
>   Library paths:
>     C:\Program Files\POV-Ray for Windows v3.6\INCLUDE
>     C:\WINDOWS\Fonts
> Output Options
>   Image resolution 800 by 600 (rows 1 to 600, columns 1 to 800).
>   Output file: D:\Orphi\POVRay\CubicMandelbrot\Quadratic-Julibrot-12.png,
24 bpp PNG
>   Graphic display......On  (gamma: 2.2)
>   Mosaic preview.......Off
>   CPU usage histogram..Off
>   Continued trace......Off
> Tracing Options
>   Quality:  9
>   Bounding boxes.......On   Bounding threshold: 3
>   Light Buffer.........On
>   Vista Buffer.........On   Draw Vista Buffer....Off
>   Antialiasing.........On  (Method 2, Threshold 0.300, Depth 2, Jitter
1.00)
>   Clock value:    0.000  (Animation off)
>
>   0:00:00 Parsing
>
>   0:00:00 Creating bounding slabs
>
>   0:00:00 Creating bounding slabs 23K tokens
> Scene Statistics
>   Finite objects:            1
>   Infinite objects:          0
>   Light sources:             2
>   Total:                     3
>
>   0:00:00 Displaying
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> File: D:\Orphi\POVRay\CubicMandelbrot\Quadratic-Julibrot-12.pov  Line: 38
> File Context (5 lines):
>   {
>     function {
> Shutdown Warning: The maximum gradient found was 6656.707, but
max_gradient of the isosurface was set to 2000.000. The
>  isosurface may contain holes! Adjust max_gradient to get a proper
rendering of the isosurface.
>
>   9:40:42 Done Tracing
> Render Statistics
> Image Resolution 800 x 600
> --------------------------------------------------------------------------
--
> Pixels:           480000   Samples:          604229   Smpls/Pxl: 1.26
> Rays:             604229   Saved:                 0   Max Level: 1/5
> --------------------------------------------------------------------------
--
> Ray->Shape Intersection          Tests       Succeeded  Percentage
> --------------------------------------------------------------------------
--
> CSG Intersection               1248066          328063     26.29
> Isosurface                     1248066          901670     72.25
> Isosurface Container           1248066         1248066    100.00
> Isosurface Cache                231441           77255     33.38
> Plane                          1248066          707872     56.72
> --------------------------------------------------------------------------
--
> Isosurface roots:           1248066
> Function VM calls:        176683464
> --------------------------------------------------------------------------
--
> Calls to Noise:                   0   Calls to DNoise:              10
> --------------------------------------------------------------------------
--
> Shadow Ray Tests:            643837   Succeeded:                  2997
> --------------------------------------------------------------------------
--
> Smallest Alloc:                  17 bytes
> Largest  Alloc:               76840 bytes
> Peak memory used:            435346 bytes
>
>   9:40:42 Reclaiming memory
> Total Scene Processing Times
>   Parse Time:    0 hours  0 minutes  1 seconds (1 seconds)
>   Photon Time:   0 hours  0 minutes  0 seconds (0 seconds)
>   Render Time:   9 hours 40 minutes 42 seconds (34842 seconds)
>   Total Time:    9 hours 40 minutes 43 seconds (34843 seconds)
> CPU time used: kernel 9.92 seconds, user 34174.44 seconds, total 34184.36
seconds
> Render averaged 14.04 PPS over 480000 pixels
> --------------------------------------------------------------------------
--
>

Post a reply to this message

> So here is the same isosurface, with the opposite end sliced off this time.
>
> This one took over 9.5 hours to render instead of 8. But hey, I guess I'm the 
> only person who finds any of this exciting, so maybe I'll stop posting...
>
> Andrew @ home.

No, you're not the only one !!!!!!!! This one looks really like a vein 
slice ! i love it !

-- 

Dark Skull Software
http://www.darkskull.net

A+

Post a reply to this message

Andrew C on Mozilla <voi### [at] devnull> wrote:
> So here is the same isosurface, with the opposite end sliced off this time.
>
> This one took over 9.5 hours to render instead of 8. But hey, I guess
> I'm the only person who finds any of this exciting, so maybe I'll stop
> posting...
>
> Andrew @ home.


Don't stop!  I haven't been near a computer very often lately (abatement
services is de-asbestosing my office this summer), but this is very cool.
It would make a great textbook cover. Have you posted a source?  I'm trying
to think how you do this as an isosurface.  Do you manually do several
iterations?  (Without a logic-loop in isosurfaces, this would seem
difficult to do "elegantly.")

Dave Matthews

Post a reply to this message

>>This one took over 9.5 hours to render instead of 8. But hey, I guess
>>I'm the only person who finds any of this exciting, so maybe I'll stop
>>posting...
> 
> Don't stop!

OK. :-)

> It would make a great textbook cover.

Where do you think I got it from? ;-)

(Well... actually it was a colour plate inside a book about fractals. I 
forget which one - might even be BOF.)

> Have you posted a source?  I'm trying
> to think how you do this as an isosurface.  Do you manually do several
> iterations?  (Without a logic-loop in isosurfaces, this would seem
> difficult to do "elegantly.")

Oh, it is NOT elegant!

You *can* have a logic-loop in an isosurface - but it gets evaluated at 
PARSE TIME, not RENDER TIME. Just do something like this:

#macro MyFunction(x, y, z, Iter)
   #if (Iter>0)
     MyFunction(x, y, z, Iter-1) - MyFunction(x, y, -z, Iter-1)
   #else
     sin(x) + cos(y) + tan(z)
   #end
#end

(Actually, the quadratic mapping is a tad more difficult to do then 
that, but it shows the principle. Don't try to render it BTW - it 
probably looks rubbish!)

Enter "MyFunction(x, y, z, 7)", and once parsing is complete, it's as if 
you really typed in the sin(), cos(), tan() functions 128 times... (And 
POV-Ray has to recompute them that many times... slow, slow, slow!)

. . .

In case you're interested... I'm currently waiting for another render to 
finish. This time it's a 3D slice of the (4D) cubic Mandelbrot set. (Or 
rather, the set M+; the actual Mandelbrot set is the intersection of M+ 
and M-, but it's going quite slow enough as it is, thanks!)

Render time so far is 4 days, 5 hours, 41 mintes - 52% complete. Has 
loads of isosurface faults, but I'm NOT turning the max_gradient up any 
higher!!!

Andrew @ home.

Post a reply to this message