Does anyone know how to make a true spiral texture, like that of a candy
cane. I know you can use grandient x+y to simulate one but that only works
if you have the proper angle. I want to be able to animate it so I need it
to really spiral up the object.

Any help would be appreciated,
Thanks,
Darcy

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How about spiral1 pigment type?  That should do the trick!

--
Lance.


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Darcy Johnston wrote in message <3671d1e1.0@news.povray.org>...
>Does anyone know how to make a true spiral texture, like that of a candy
>cane. I know you can use grandient x+y to simulate one but that only works
>if you have the proper angle. I want to be able to animate it so I need it
>to really spiral up the object.
>
>Any help would be appreciated,
>Thanks,
>Darcy
>
>

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Lance Birch wrote in message <3671d394.0@news.povray.org>...
>How about spiral1 pigment type?  That should do the trick!


Ok,  I think this puts me down under dink of the day. :)
I thought I had done a search in the pov manual for Spiral, but obviously, I
must have checked for some other word instead. Sorry about that.

Thank you very much.
Darcy

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Darcy Johnston <dmj### [at] homecomNOSPAM> wrote:
: Does anyone know how to make a true spiral texture, like that of a candy
: cane. I know you can use grandient x+y to simulate one but that only works
: if you have the proper angle. I want to be able to animate it so I need it
: to really spiral up the object.

  Are you talking about a spiral shape or a helix shape? The spiral
texture is a spiral, not a helix, so it may not help you.

-- 
main(i){char*_="BdsyFBThhHFBThhHFRz]NFTITQF|DJIFHQhhF";while(i=
*_++)for(;i>1;printf("%s",i-70?i&1?"[]":" ":(i=0,"\n")),i/=2);} /*- Warp. -*/

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>  Are you talking about a spiral shape or a helix shape?


I understand what the difference between spiral and helix is
for POV, but I was just wondering what (as a language thing)
the difference between a "spiral" and a "helix" is. I always
thought they meant the same thing.

Julius

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Nieminen Mika wrote in message <3672459a.0@news.povray.org>...
>Darcy Johnston <dmj### [at] homecomNOSPAM> wrote:
>: Does anyone know how to make a true spiral texture, like that of a candy
>: cane. I know you can use grandient x+y to simulate one but that only
works
>: if you have the proper angle. I want to be able to animate it so I need
it
>: to really spiral up the object.
>
>  Are you talking about a spiral shape or a helix shape? The spiral
>texture is a spiral, not a helix, so it may not help you.


I guess I mean a helix shape since I want the texture to spiral up a column.
Like I said, I want something like the stripe on a candy cane. I've been
able to simulate it as I mentioned above, but I'm looking for something that
I can view from all angles.

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Ok, I went with the spiral1 pattern and I was able to get what I wanted.
Since I was using up = y, I had to rotate the pattern in order to get the
orientation right.

So by using
    pigment {swirl1 4 rotate x*90}

I was able to get the effect I wanted. Now all I need to do now is set the
pigment modifiers to get the right colors in there and scale it properly.

Thanks to everyone,
Darcy

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open textures.inc
scroll down
at almost the bottom,. you'll find the texture declared...
Copy that to your source, declare as MySprialThing or something, then change it...
//Spider


Darcy Johnston wrote:
> 
> Ok, I went with the spiral1 pattern and I was able to get what I wanted.
> Since I was using up = y, I had to rotate the pattern in order to get the
> orientation right.
> 
> So by using
>     pigment {swirl1 4 rotate x*90}
> 
> I was able to get the effect I wanted. Now all I need to do now is set the
> pigment modifiers to get the right colors in there and scale it properly.
> 
> Thanks to everyone,
> Darcy

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Julius Klatte <jku### [at] hotmailcom> wrote:
: I understand what the difference between spiral and helix is
: for POV, but I was just wondering what (as a language thing)
: the difference between a "spiral" and a "helix" is. I always
: thought they meant the same thing.

  Maybe I'm wrong, but this is what I have understood:
  AFAIK: A spiral is a line on a 2D plane which can be drawn this way:
start drawing a circle but increase the radius constantly. When you have
made a complete 360 degrees curve, you are a little bit farther away from
the center. Continue drawing and you get a spiral curve.
  A helix is a 3D line instead of 2D like the spiral. You can draw it this
way: start drawing a circle in the xy-plane, but instead of changing the
radius, keep it constant, but increase the z-coordinate, ie. the height.
When you have done a complete 360 degrees curve, you are still at the same
distance from the center axis, but a little bit higher from the plane.
Continue this way and you get a helix curve.
  A galaxy has typically a spiral shape, while a spring has a helix shape.

-- 
main(i){char*_="BdsyFBThhHFBThhHFRz]NFTITQF|DJIFHQhhF";while(i=
*_++)for(;i>1;printf("%s",i-70?i&1?"[]":" ":(i=0,"\n")),i/=2);} /*- Warp. -*/

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Actually, I believe a helix is a spiral, but a spiral is not a helix... Never
mind, though. You are correct.
So how do you call the shape where both the radius and the height increase?
Spiralling helix? Helical spiral? Just curious.

Margus

Nieminen Mika wrote:
> 
>   Maybe I'm wrong, but this is what I have understood:
>   AFAIK: A spiral is a line on a 2D plane which can be drawn this way:
> start drawing a circle but increase the radius constantly. When you have
> made a complete 360 degrees curve, you are a little bit farther away from
> the center. Continue drawing and you get a spiral curve.
>   A helix is a 3D line instead of 2D like the spiral. You can draw it this
> way: start drawing a circle in the xy-plane, but instead of changing the
> radius, keep it constant, but increase the z-coordinate, ie. the height.
> When you have done a complete 360 degrees curve, you are still at the same
> distance from the center axis, but a little bit higher from the plane.
> Continue this way and you get a helix curve.
>   A galaxy has typically a spiral shape, while a spring has a helix shape.
> 
> --
> main(i){char*_="BdsyFBThhHFBThhHFRz]NFTITQF|DJIFHQhhF";while(i=
> *_++)for(;i>1;printf("%s",i-70?i&1?"[]":" ":(i=0,"\n")),i/=2);} /*- Warp. -*/

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