"sumdumguy" <nomail@nomail> wrote:
> I am looking to create an effect where I have a tube and there is algae
> growing
> off of it. The rough shape is similar to this image:
> http://www.fortunecity.com/greenfield/hawks/191/ChekJawa/chek3.jpg
> That seems to be a real thing so no pov model is available :).
> I am wondering whether there is a tool which generates such things. It is
> not
> quite landscape or tree generator (needs to be semitransparent and no
> branching
> and does not grow on a plane but on a tube, also needs to "wiggle").

They seem to have removed the image. It can be found by GIS for:
"colorful tube anemone" Cerianthus

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"sumdumguy" <nomail@nomail> wrote in message 
news:web.46808ae7b9f20e2fe08693640@news.povray.org...
> "sumdumguy" <nomail@nomail> wrote:
>> I am looking to create an effect where I have a tube and there is algae
>> growing
>> off of it. The rough shape is similar to this image:
>> http://www.fortunecity.com/greenfield/hawks/191/ChekJawa/chek3.jpg
>> That seems to be a real thing so no pov model is available :).
>> I am wondering whether there is a tool which generates such things. It is
>> not
>> quite landscape or tree generator (needs to be semitransparent and no
>> branching
>> and does not grow on a plane but on a tube, also needs to "wiggle").
>
> They seem to have removed the image. It can be found by GIS for:
> "colorful tube anemone" Cerianthus


     It's there for me. You could try a free modelling program like Wings3D, 
www.wings3d.com

     You would create your model/s in Wings, and then import it/them into 
free PoseRay, http://mysite.verizon.net/sfg0000/

      Add your textures, and then export the models to free PoV-Ray.

        HTH

       ~Steve~

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Leroy <lrw### [at] joplincom> wrote:
> sumdumguy wrote:
> > I am looking to create an effect where I have a tube and there is algae
> > growing
> > off of it. The rough shape is similar to this image:
> > http://www.fortunecity.com/greenfield/hawks/191/ChekJawa/chek3.jpg
> > That seems to be a real thing so no pov model is available :).
> > I am wondering whether there is a tool which generates such things. It is
> > not
> > quite landscape or tree generator (needs to be semitransparent and no
> > branching
> > and does not grow on a plane but on a tube, also needs to "wiggle").
> >
> >
> How about using 'sphere sweep' and make it by hand!?

This is a chore. I would need to ensure that paths are
a. Starting from the defined shape (here - cylinder)
b. Wiggle randomly
c. Do not self intersect
d. Do not intersect other wiggly shapes
The "no intersections" condition means that wiggles will be more constrained
close to the base shape (cylinder) and grow in amplitude away from it.
This is a chore to code by hand. You could also make trees by hand but it is
painful enough that people have specialized software for the purpose. I have
done a few sphere sweeps by hand and it took time. Doing a few thousand
needed
for this effect by hand would take an incredible amount of time.

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"sumdumguy" <nomail@nomail> wrote:
> Leroy <lrw### [at] joplincom> wrote:
> > sumdumguy wrote:
> > > I am looking to create an effect where I have a tube and there is algae
> > > growing
> > > off of it. The rough shape is similar to this image:
> > > http://www.fortunecity.com/greenfield/hawks/191/ChekJawa/chek3.jpg
> > > That seems to be a real thing so no pov model is available :).
> > > I am wondering whether there is a tool which generates such things. It is
> > > not
> > > quite landscape or tree generator (needs to be semitransparent and no
> > > branching
> > > and does not grow on a plane but on a tube, also needs to "wiggle").
> > >
> > >
> > How about using 'sphere sweep' and make it by hand!?
>
> This is a chore. I would need to ensure that paths are
> a. Starting from the defined shape (here - cylinder)
> b. Wiggle randomly
> c. Do not self intersect
> d. Do not intersect other wiggly shapes
> The "no intersections" condition means that wiggles will be more constrained
> close to the base shape (cylinder) and grow in amplitude away from it.
> This is a chore to code by hand. You could also make trees by hand but it is
> painful enough that people have specialized software for the purpose. I have
> done a few sphere sweeps by hand and it took time. Doing a few thousand
> needed
> for this effect by hand would take an incredible amount of time.

I just did a rough calculation and I need about 200 of these "tentacles".
So it's not as bad as I thought but still very painful. Any automation tool
would be good to know about.

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"sumdumguy" <nomail@nomail> wrote:
> I just did a rough calculation and I need about 200 of these "tentacles".
> So it's not as bad as I thought but still very painful. Any automation tool
> would be good to know about.


http://runevision.com/3d/anims/tentacledance.mpg
It sounds like you want something like this.


Stephen

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"Stephen" <mcavoys_AT_aolDOT.com> wrote:
> "sumdumguy" <nomail@nomail> wrote:
> > I just did a rough calculation and I need about 200 of these "tentacles".
> > So it's not as bad as I thought but still very painful. Any automation tool
> > would be good to know about.
>

> http://runevision.com/3d/anims/tentacledance.mpg
> It sounds like you want something like this.
>
>
> Stephen

Thanks, that's a very good start for me (no I have not seen that before).

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"sumdumguy" <nomail@nomail> wrote in message 
news:web.46817f8cb9f20e2fe08693640@news.povray.org...


> Thanks, that's a very good start for me (no I have not seen that before).


     Good luck. Don't forget to post an image so we can help some more.

      ~Steve~

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I stumbled on Moment of Inspiration (http://moi3d.com/) a couple of days
ago. It's a sort of tablet-geared Sketch-up, but you can use it with a
mouse too. You can draw wiggly things in it. It can export as obj, 3dm and
3ds. The beta has an expiry date, just like POVray 3.7.

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sumdumguy nous apporta ses lumieres en ce 2007/06/25 14:12:
> I am looking to create an effect where I have a tube and there is algae
> growing
> off of it. The rough shape is similar to this image:
> http://www.fortunecity.com/greenfield/hawks/191/ChekJawa/chek3.jpg
> That seems to be a real thing so no pov model is available :).
> I am wondering whether there is a tool which generates such things. It is
> not
> quite landscape or tree generator (needs to be semitransparent and no
> branching
> and does not grow on a plane but on a tube, also needs to "wiggle").
> 
> 
How about using sphere_sweeps with a reasonable number of points. Use the 
v_turbulence and v_rotate macros, with a magnitude that start at almost zero and 
slowly increase as you reach the tips, to place each succesive points. Place a 
copy of those points in some arrays that you can read back to check for 
intersections.
By using v_turbulence and restricting the range, you will minimize the 
probability of neiboring tentacles to intersect each other, and elliminate the 
risk of self-intersections.
I realise that this is somewhat advanced, and may be beter placed in the general 
or advanced-users groups.

-- 
Alain
-------------------------------------------------
Black holes suck!

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sumdumguy wrote:
> I just did a rough calculation and I need about 200 of these "tentacles".
> So it's not as bad as I thought but still very painful. Any automation tool
> would be good to know about.
> 
> 
I'm sorry I should have said let pov make and move the "tentacles" for 
you using "sphere_sweep". (Like Alain's thoughts below)
"By Hand" has come to mean to me ,I know it's wrong :( , using POV to 
make something. I'll try to do better. :)

You set up an array or arrays for a default "sphere_sweep" to get the 
length and shape you want then deform that array for each tentacle and 
place it on your tube.

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