Hello,

this one was inspired by David Fontaine's faceted twisted torus and
especially by David Heys' reply.

Any comments?

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Michael Zier wrote:
> 
> Hello,
> 
> this one was inspired by David Fontaine's faceted twisted torus and
> especially by David Heys' reply.
> 
> Any comments?
> 
>   ------------------------------------------------------------------------
>  [Image]


Any possibility of animating this?  Perhaps with the two extreme top and
bottom points moving down along the central axis and actually turning
the thing inside out with the camera moving in towards the centre?  That
would cause ( imagination here ) the glowing gas to be ejected outside
and the viewer would be left inside looking out at swirling gas.  

Just a thought.

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Simply gorgeous. :{)

David

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Dennis Clarke wrote:
> 
> 
> Any possibility of animating this?  Perhaps with the two extreme top and
Well, I just don't have any idea, how to animate the media in an
realistic way. Just to cycle through the phase property would look ugly.
BTW, there could be a kind of non-linear transform in future versions of
POV, e.g. 
transform {
 non_linear {
  x=f_x(x,y,z)
  y=f_y(x,y,z)
  z=f_z(x,y,z)
 }
}
this could be very useful in modifying patterns used in media densities.
Just a thought, too.
Anyway, if anyone has any idea of animate media realistically, let me
know.
> 
> Just a thought.
You must have a very great imagination...

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In article <39885E9B.49E5E5C9@mail.wh2.tu-dresden.de>, Michael Zier 
<zie### [at] mailwh2tu-dresdende> wrote:

> Well, I just don't have any idea, how to animate the media in an
> realistic way. Just to cycle through the phase property would look ugly.

You could translate the pattern a bit, apply turbulence, and then 
translate it back. Control the distance you translate it using the clock 
variable, and you could get a kind of animated turbulence.
You could also combine several patterns(using isosurface functions), 
each with different rates of rotation/translation.


> BTW, there could be a kind of non-linear transform in future versions of
> POV, e.g. 
> transform {
>  non_linear {
>   x=f_x(x,y,z)
>   y=f_y(x,y,z)
>   z=f_z(x,y,z)
>  }
> }
> this could be very useful in modifying patterns used in media densities.

There is already a way to apply non-linear transforms to patterns: 
warps. And I have been working on a way to do exactly what you describe, 
using the displace warp and a new pigment which takes an isosurface 
function for each color component.(I actually have it coded, but haven't 
tested it yet.)


> Anyway, if anyone has any idea of animate media realistically, let me
> know.

You could do it with a bunch of particles. :-)

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

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Chris Huff wrote:
> 
> 
> There is already a way to apply non-linear transforms to patterns:
> warps. And I have been working on a way to do exactly what you describe,
> using the displace warp and a new pigment which takes an isosurface
> function for each color component.(I actually have it coded, but haven't
> tested it yet.)
> 
Thanks, I'll give it a try.

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"David Heys" <sou### [at] gcinet> wrote in message
news:3988444d@news.povray.org...
| Simply gorgeous. :{)

ditto that.

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Wow I really like this!! Only comment I can make is that the spheres at the
joins look a little too big to me. This is only a concern if you are striving
for realism. Either way it is a great image:-)

Michael Zier wrote:

> Hello,
>
> this one was inspired by David Fontaine's faceted twisted torus and
> especially by David Heys' reply.
>
> Any comments?
>
>   ------------------------------------------------------------------------
>  [Image]

--
Come visit my web site:-) : http://www.geocities.com/~thomaslake/

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Michael Zier wrote:

> transform {
>  non_linear {
>   x=f_x(x,y,z)
>   y=f_y(x,y,z)
>   z=f_z(x,y,z)
>  }
> }

That is already possible with MegaPOV for pigment and isosurface functions.

--
David Fontaine     <dav### [at] faricynet>     ICQ 55354965
Please visit my website: http://www.faricy.net/~davidf/

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Cool, now make a cluster, where no glass panels intersect, instead they are
cut off where crystal overlap and new vertices are added. :-)

--
David Fontaine     <dav### [at] faricynet>     ICQ 55354965
Please visit my website: http://www.faricy.net/~davidf/

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