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Dragon's Orb IMandelboxMandelbulb Pow 7 in 2D
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Description: Mandelbox with scale=-1.5 and Julia vector=(0.43,0.193,-0.385).

Views: 1476
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Filesize: 562.47kB
Height: 720 Width: 1280
Keywords: mandelbox 
Posted by: trafassel March 16, 2010, 08:01:51 AM

Rating: *** by 2 members.

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Comments (5) rss
Fractal Bachius
Posts: 525

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March 23, 2010, 10:28:32 AM
I would be nice, if you link to the Gestaltlupe package from you webpage. But be aware, that the the current public mandelbox formula in this package contains some errors. Indeed and all of my 3 current mandelbox pictures was generated by the wrong formula.

if m<r         m = m/r^2
  else if m<1 m = 1/m^2

I used:

if m<r         m = m/sqrt(r)
  else if m<1 m = 1/sqrt(m)

I will fix it in the next days.

Fractal Molossus
Posts: 691

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March 22, 2010, 01:56:58 AM
Fantastic (and your latest pictures too). I don't think 1 minute is at all slow for generating the geometry.
Do you mind if I link to this package from the web page I set up (http://sites.google.com/site/mandelbox)?
Fractal Bachius
Posts: 525

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March 18, 2010, 09:52:18 AM
This picture was generated with Gestaltlupe (source code is hosted by github.com). Rendering is a 2 stage process.

In the first stage the geometry is generated. The geometry data for each pixel of the resulting bitmap contains:
    the coordinates of  the corresponding point of the object surface,
    the surface normal  
   and some additional infos (i.e. surface color).

The process needs long time (for the picture approximately 1 min. on my i7 laptop).

In the second stage the renderer generates the bitmap. The renderer knows for each pixel the distance from the camera; this information can be used to generate a depth of field. If you want to look into the implementation, you have to download the source from http://github.com/trafassel/Gestaltlupe and open the file sharpenderer.cs .

The first stage used multiple threads. This means, the computation is done on multiple processors.
The second stage runs in one thread and use only one processor. But, because the second stage is much faster than the first stage, I don't expect much performance boost of parallelize render parts (in this picture, the second stage needs 27 sec. on my i7).  
Fractal Molossus
Posts: 691

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March 17, 2010, 04:50:23 AM
Awesome! smiley may I ask what renderer you use that has depth of field? or is it a post effect?
Global Moderator
Fractal Senior
Posts: 2070

At the borders...

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March 16, 2010, 12:13:19 PM
Neat effect, looks like a real object  wink

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