POV-Ray : Newsgroups : povray.general : need help creating a texture Server Time
29 Nov 2024 17:52:51 EST (-0500)
  need help creating a texture (Message 1 to 3 of 3)  
From: DJGrenola
Subject: need help creating a texture
Date: 28 Jul 2005 19:50:00
Message: <web.42e96ecedc6855dd6192c5c80@news.povray.org>
hi there,

I'm trying to create a texture to be applied to a long, thin box. The
texture needs to consist of alternating black and yellow/orange stripes.
Perhaps a piece of ASCII art would help.

|__   __|
|  \_/  |
|__   __|
|  \_/  |
|__   __|
|  \_/  |
|__   __|
|  \_/  |
|       |
 O  Y  O

The lines represent the stripes. The area in between them is black. The
stripes should be yellow in the centre and orange towards the edges.

I can create straight horizontal stripes using a combination of a scaled
checker overlaid with a gradient / color_map combination to produce the
orange/yellow tinges - that's straightforward enough. What I cannot figure
out is a way to warp the stripes in the centre so that they have that
"grooved" effect.

I could do it by creating intersections with CSG objects passing through the
box and texturing the intersected areas differently, but this seems like a
pretty horrible, inelegant solution, as I need perhaps 50 or 100 stripes. I
could also of course use a GIF or something, but really I would much rather
try to keep things within the scene files and not use anything external.

I'm reasonably new to POV-Ray, so there may be an obvious answer.

Thanks,

DJG


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From: Slime
Subject: Re: need help creating a texture
Date: 28 Jul 2005 20:24:30
Message: <42e9773e$1@news.povray.org>
> I could do it by creating intersections with CSG objects passing through
the
> box and texturing the intersected areas differently, but this seems like a
> pretty horrible, inelegant solution, as I need perhaps 50 or 100 stripes.

If you make a CSG object which represents the shape of the orange stripes,
you can then use the object pattern with a repeat warp to turn it into a
pigment, which you can then use in a pigment_pattern.

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


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From: DJGrenola
Subject: Re: need help creating a texture
Date: 28 Jul 2005 20:40:00
Message: <web.42e97ab02f6440ab6192c5c80@news.povray.org>
> If you make a CSG object which represents the shape of the orange stripes,
> you can then use the object pattern with a repeat warp to turn it into a
> pigment, which you can then use in a pigment_pattern.

aha - that looks promising - I'd not come across object patterns before.

thanks.


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