Hi all,

I was thinking that I could create abstract or semi-abstract images for use
as cover pictures for e-books... and Julia fractals seemed as perfect
candidates.

So I made this three Julia "thingies": selected parameters from random
samples, very simple textures (from standard include files), some focal


-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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Attachments:
Download 'cover1.jpg' (42 KB) Download 'cover2.jpg' (38 KB) Download 'cover3.jpg' (48 KB)

Preview of image 'cover1.jpg'

Preview of image 'cover2.jpg'

Preview of image 'cover3.jpg'

Jellby <me### [at] privacynet> wrote:
> Hi all,
>
> I was thinking that I could create abstract or semi-abstract images for use
> as cover pictures for e-books... and Julia fractals seemed as perfect
> candidates.
>
> So I made this three Julia "thingies": selected parameters from random
> samples, very simple textures (from standard include files), some focal

>
> --
> light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
> 9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
> 0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby


Simple but beautiful, and I prefer the second.

:D

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Among other things, Carlo C. saw fit to write:

> Simple but beautiful, and I prefer the second.

The second has some "problems" that are mitigated with the focal blur and
reflective surface. Other artifacts disappear when the precision is
increased, not these (I tried up to 20000), I wonder if they are "features"
of this object.

camera
{
  location  < 0.0 , 0.0 , -2.8 >
  look_at   < 0.0 , 0.0 , 0.0 >
  up        < 0.0 , 1.0 , 0.0 >
  right     < 1.0 , 0.0 , 0.0 >
}

light_source {
  < -20.0 , 20.0 , -20.0 >
  color rgb < 1.0 , 1.0 , 1.0 >
}

#declare Background = < 0.1812 , 0.1317 , 0.0120 > ;
#declare Point = < 0.2642 , 0.2837 , 0.3712 , -0.0788 > * 2 ;
#declare Vector = < -0.6886 , -0.6925 , 0.1043 , 0.9352 > ;
#declare Distance = 0.0130 ;
#declare Rotation = < 59.71 , 148.16 , 297.20 > ;

background {
  color rgb 1
}

julia_fractal {
  Point
  quaternion
  sqr
  max_iteration 7
  precision 200
  slice Vector, Distance
  texture {
    pigment { color rgb 1 }
  }
  scale 0.85
  rotate Rotation
}

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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Attachments:
Download 'julia2.jpg' (25 KB)

Preview of image 'julia2.jpg'

Jellby nous illumina en ce 2008-12-30 08:13 -->
> Among other things, Carlo C. saw fit to write:
> 
>> Simple but beautiful, and I prefer the second.
> 
> The second has some "problems" that are mitigated with the focal blur and
> reflective surface. Other artifacts disappear when the precision is
> increased, not these (I tried up to 20000), I wonder if they are "features"
> of this object.
> 
> camera
> {
>   location  < 0.0 , 0.0 , -2.8 >
>   look_at   < 0.0 , 0.0 , 0.0 >
>   up        < 0.0 , 1.0 , 0.0 >
>   right     < 1.0 , 0.0 , 0.0 >
> }
> 
> light_source {
>   < -20.0 , 20.0 , -20.0 >
>   color rgb < 1.0 , 1.0 , 1.0 >
> }
> 
> #declare Background = < 0.1812 , 0.1317 , 0.0120 > ;
> #declare Point = < 0.2642 , 0.2837 , 0.3712 , -0.0788 > * 2 ;
> #declare Vector = < -0.6886 , -0.6925 , 0.1043 , 0.9352 > ;
> #declare Distance = 0.0130 ;
> #declare Rotation = < 59.71 , 148.16 , 297.20 > ;
> 
> background {
>   color rgb 1
> }
> 
> julia_fractal {
>   Point
>   quaternion
>   sqr
>   max_iteration 7
>   precision 200
>   slice Vector, Distance
>   texture {
>     pigment { color rgb 1 }
>   }
>   scale 0.85
>   rotate Rotation
> }
> 
> 
> 
> ------------------------------------------------------------------------
> 
Those change if you place the camera at another location or you change the 
rotation. I'd call them "glitches" and computational errors.

-- 
Alain
-------------------------------------------------
I find that the harder I work, the more luck I seem to have.
Thomas Jefferson

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