I was reading about Moebius strips on Mathworld
(http://mathworld.wolfram.com/), and I was rather taken with the
animation on the page.  Here's my take on the construction.

Render time was ~2 hours @ 1280x960 on a 2GHz Athlon.  Needless to say
an animation may be a while coming...

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Download 'Moebius.jpg' (61 KB)

Preview of image 'Moebius.jpg'

The colors are brilliant! I like. The gears seem a little strangely shaped,
though; it's obvious the ridges were made by cutting cylinders out of them.

 - Slime
[ http://www.slimeland.com/ ]

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> Render time was ~2 hours @ 1280x960 on a 2GHz Athlon.  Needless to say
> an animation may be a while coming...

Blimey... That's a bit of a long render time isn't it? Especially for such a
high spec machine...

But anyway, the result seems to have been worth the wait! I like the
colours, and the whole image has a nice balanced feel to it.

Keep it up!
Andrew.

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"Andrew Coppin" <orp### [at] btinternetcom> wrote in message
news:3dae8e28@news.povray.org...
> > Render time was ~2 hours @ 1280x960 on a 2GHz Athlon.  Needless to say
> > an animation may be a while coming...
>
> Blimey... That's a bit of a long render time isn't it? Especially for such a
> high spec machine...

I wouldn't have thought so, not when high quality focal blur is used.

All the best,

Andy Cocker

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Ah - didn't notice the focal blur! Suddenly everything is clear... ;-)

Andrew.

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Yes, blur_samples 125 variance 0.001.  Otherwise it's nice and fast.


"Andrew Coppin" <orp### [at] btinternetcom> wrote in message
news:3daea162@news.povray.org...
> Ah - didn't notice the focal blur! Suddenly everything is clear... ;-)
>
> Andrew.
>
>
>

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Thanks!  I agree about the gears - these were only meant as
placeholders, but when it came to making "real" ones, I found I had no
idea what actual cogs really look like in detail!  Maybe it's time to
take apart some clocks...


"Slime" <slm### [at] slimelandcom> wrote in message
news:3dadd8f4$1@news.povray.org...
> The colors are brilliant! I like. The gears seem a little strangely
shaped,
> though; it's obvious the ridges were made by cutting cylinders out of
them.
>
>  - Slime
> [ http://www.slimeland.com/ ]
>
>

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"Andrew" <ast### [at] hotmailcom> wrote in message
news:3dadd536@news.povray.org...
> I was reading about Moebius strips on Mathworld
> (http://mathworld.wolfram.com/), and I was rather taken with the
> animation on the page.  Here's my take on the construction.
>

Neato. Perhaps gear-mess.zip may help

http://www.wozzeck.net/images/gear-mess.html

There's also a gear macro around, for pov 3.0 but not a problem for
3.1+ I believe. I have it archived around somewhere if you want.

Small brass clock type gears usualy have a brushed satin finish on
them. Would make yours look even better :)

Alf

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> I was reading about Moebius strips on Mathworld
> (http://mathworld.wolfram.com/), and I was rather taken with the
> animation on the page.  Here's my take on the construction.
> 
> Render time was ~2 hours @ 1280x960 on a 2GHz Athlon.  Needless to say
> an animation may be a while coming...

However, you'd only need to do 1/20th of a rotation and loop it...

Jamie.

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Hope this help.. just a quick 'thing'.. :)

--
FD
Mode { NOSPAM } = On ;

// Begin copy
#declare Gear =
object {
  union {

    // Main
    difference {
      cylinder { <0,0,-0.2> <0,0,0.2> 0.5 }
      cylinder { <0,0,-1.0> <0,0,1.0> 0.15 }
      cylinder { <0,0,-1.0> <0,0,-0.1> 0.36 }
      cylinder { <0,0,0.1> <0,0,1> 0.36 }
      cylinder { <0,0,-1> <0,0,-0.14> 0.4 }
      cylinder { <0,0,0.14> <0,0,1> 0.4 }
      torus { 0.36,0.04 rotate <90,0,0> translate <0,0,-0.14> }
      torus { 0.36,0.04 rotate <90,0,0> translate <0,0,0.14> }
      }

    // Axle
    difference {
      cylinder { <0,0,-0.2> <0,0,0.2> 0.2 }
      cylinder { <0,0,-1.0> <0,0,1.0> 0.1 }
      box { <-0.04,0,-1> <0.04,0.11,1> }
      }
    difference {
      cylinder { <0,0,-0.14> <0,0,0.14> 0.24 }
      cylinder { <0,0,-1> <0,0,1> 0.15 }
      torus { 0.24,0.04 rotate <90,0,0> translate <0,0,-0.14> }
      torus { 0.24,0.04 rotate <90,0,0> translate <0,0,0.14> }
      }

    // Dents
    #declare Rotation = 360 ;
    #while ( Rotation > 0 )
      difference {
        intersection {
          cylinder { <0,0,-0.3> <0,0,0.3> 0.15 translate
<-0.11,0.46,0> }
          cylinder { <0,0,-0.3> <0,0,0.3> 0.15 translate <0.11,0.46,0> }
          cylinder { <0,0,-0.2> <0,0,0.2> 0.54 }
          }
        cylinder { <0,0,-1> <0,0,1> 0.48 }
        rotate <0,0,Rotation>
        }
      #declare Rotation = Rotation - 12 ;
    #end
    }
  texture { // your texture here.. mine's no good... :)
    pigment { color Gold }
    normal { bumps 0.2 scale 0.2 }
    finish { metallic reflection 0.05 }
    }
  }
// End copy

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Attachments:
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Preview of image 'gear.jpg'