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Hi,
Taking the simple example from the pov-ray docs :
difference {
intersection{
sphere { <0, 0,0>, 1
translate -0.5*x
}
sphere { <0, 0,0>, 1
translate 0.5*x
}
pigment { Red }
rotate 90*y
}
cylinder { <0, 0, -1> <0, 0, 1>, 0.35
pigment { Blue }
}
}
The docs say "if we eliminate this pigment (the blue) the surface of the
hole will be red".
Any way I do it the hole surface becomes black.
Anybody like to tell me what I'm doing wrong?
I know I could make the cylinder red but I am trying to apply this to a
more complex shape.
TIA,
Graham.
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On Thu, 02 Nov 2000 16:15:49 +0000, Graham wrote:
>The docs say "if we eliminate this pigment (the blue) the surface of the
>hole will be red".
If the docs say that, they are wrong.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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On Thu, 02 Nov 2000 16:15:49 +0000, Graham wrote:
>Hi,
>
>Taking the simple example from the pov-ray docs :
It'd be nice if all the examples in the docuenation were numbered
then we'd know exactly what you were refering to.
Let's make it a bit more readable:
difference{
intersection{
sphere{<0, 0,0>, 1
translate -0.5*x
}
sphere{<0, 0,0>, 1
translate 0.5*x
}
// pigment { Red } comented out.
rotate 90*y
} // End of intersection.
cylinder {<0, 0, -1> <0, 0, 1>, 0.35
// pigment { Blue } Here only colours the cylinder.
}
pigment {Blue} // colours the difference.
} // End of difference
This does work, I've just tried it, read the comments I've put in the
code.
Best viewed with fixed width font.
--
Cheers
Steve email mailto:ste### [at] zeropps uklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
6:53pm up 22 days, 21:14, 3 users, load average: 1.08, 1.06, 1.02
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Graham wrote:
> The docs say "if we eliminate this pigment (the blue) the surface of the
> hole will be red".
Umm... then they are wrong. Perhaps you have some statements in the wrong
place?
Objects in POV are only the surface. So say for example a blue sphere, with
a part cut out, has no blue underneath. If the object you cut it with is
red, the cut-out part will be red because it is on the surface of the
cutting object. If you want the whole thing to be blue you would give a blue
pigment to the difference itself.
--
David Fontaine <dav### [at] faricynet> ICQ 55354965
My raytracing gallery: http://davidf.faricy.net/
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