Guess how these images have been made (answers in reply):

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Download 'image1.jpg' (23 KB) Download 'image2.jpg' (41 KB) Download 'image3.jpg' (40 KB)

Preview of image 'image1.jpg'

Preview of image 'image2.jpg'

Preview of image 'image3.jpg'

Image 1:

intersection
{ cylinder { -x,x,1 }
  cylinder { -y,y,1 }
  cylinder { -z,z,1 }
  cylinder { <-1,-1,-1>< 1, 1, 1>,1 }
  cylinder { < 1,-1,-1><-1, 1, 1>,1 }
  cylinder { <-1, 1,-1>< 1,-1, 1>,1 }
  cylinder { < 1, 1,-1><-1,-1, 1>,1 }
}

  Image 2:

union
{ #declare Angle=0;
  #while(Angle<360)
    torus { 1,.05 rotate z*45 translate -x*.3 rotate y*Angle }
    #declare Angle=Angle+30;
  #end
}

  Image 3:

union
{ #declare Angle=0;
  #while(Angle<360)
    union
    { cylinder { <0,-1,-.75>, <.75,1,.5>, .025 }
      cylinder { <0,-1,-.75>, <-.75,1,.5>, .025 }
      rotate y*Angle
    }
    #declare Angle=Angle+10;
  #end
  torus { .75, .025 translate -y }
  torus { vlength(<.75,0,.5>), .025 translate y }
}


-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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>   Image 3:
>
> union
> { #declare Angle=0;
>   #while(Angle<360)
>     union
>     { cylinder { <0,-1,-.75>, <.75,1,.5>, .025 }
>       cylinder { <0,-1,-.75>, <-.75,1,.5>, .025 }
>       rotate y*Angle
>     }
>     #declare Angle=Angle+10;
>   #end
>   torus { .75, .025 translate -y }
>   torus { vlength(<.75,0,.5>), .025 translate y }
> }

any reason for using vlength??

-paul
--
-------------------------------------------#
Paul Daniel Jones
307 Chandlee Laboratory
Penn State University
814-865-2090
pdj### [at] psuedu

http://research.chem.psu.edu/glassgrp/paul
--------------------------------------------#

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I was going to guess "CSG", but then you posted the answers. I think you're
supposed to keep us guessing for little while before you do that. :)

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with povray.

--
Mike

wk: mik### [at] pyxiscom  www.pyxis.com
hm: mwe### [at] sciticom  www.geocities.com/mikepweber


"Warp" <war### [at] tagpovrayorg> wrote in message
news:391948c4@news.povray.org...
>   Guess how these images have been made (answers in reply):
>
>


----------------------------------------------------------------------------
----


>
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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Paul Daniel Jones <pdj### [at] psuedu> wrote:
:>   torus { vlength(<.75,0,.5>), .025 translate y }

: any reason for using vlength??

  Yes: Laziness.

  It was easier than calculating sqrt(.75^2+.5^2) = .9013878188 and putting
that (inaccurate) result there.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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Warp wrote:
> 
>   Guess how these images have been made (answers in reply):

With a raytracer perhaps?

SCNR

Markus

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or... a computer?

--
Mike

wk: mik### [at] pyxiscom  www.pyxis.com
hm: mwe### [at] sciticom  www.geocities.com/mikepweber


"Markus Becker" <mar### [at] studentuni-siegende> wrote in message
news:391### [at] studentuni-siegende...
> Warp wrote:
> >
> >   Guess how these images have been made (answers in reply):
>
> With a raytracer perhaps?
>
> SCNR
>
> Markus

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Warp,

Thanks for that - much appreciated!

I don't know about anyone else, but my brain is extremely receptive to 
the "simple example, then code" method of teaching, and those three 
examples were right on the mark.

Anyone know of a website out there which has more of this sort of stuff, 
presented in this fashion?

I checked your VFAQ which pointed to:
  http://www.povray.org/links/
         POV-Ray_Include_Macro_and_Object_Files/
         Object_and_Scene_Files/
...but decriptions like "POV-Ray scene files and objects -Misc" doesn't 
really do much to inspire _my_ imagination.

A two-column table.  Simple image on the left, code snippet on the 
right.  That's all I'm after.

Thanks again.

Henry.

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In article <39196fa1@news.povray.org>, Warp <war### [at] tagpovrayorg> 
wrote:

>   Yes: Laziness.
> 
> It was easier than calculating sqrt(.75^2+.5^2) = .9013878188 and 
> putting that (inaccurate) result there.

I wouldn't call it laziness, I would say it is good style. It allows you 
to easily change the code later for different parameters, and there 
isn't any reason not to use an available function for it's intended 
purpose.
Oh, and in MegaPOV, "sqrt(0.75^2 + 0.5^2)" would work just fine(the ^ 
operator has been added), and you could use "sqrt(pow(0.75, 2) + 
pow(0.5, 2))" in official POV.

-- 
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/

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