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Can anyone please explain the proper use of the inverse keyword? The POV-Ray
helpfile doesn't realy go into detail about it and I wonder if it is the key
to create more complex CSG objects.
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PeterKetting wrote:
>
> Can anyone please explain the proper use of the inverse keyword? The POV-Ray
> helpfile doesn't realy go into detail about it and I wonder if it is the key
> to create more complex CSG objects.
difference {
object { ... }
object { ... }
}
is the same as
intersection {
object { ... }
object { ... inverse }
}
There are no CSG constructions that are impossible without 'inverse' but
it sometimes makes life much easier.
Christoph
--
POV-Ray tutorials, IsoWood include,
TransSkin and more: http://www.tu-bs.de/~y0013390/
Last updated 13 Mar. 2002 _____./\/^>_*_<^\/\.______
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On Fri, 15 Mar 2002 13:49:14 -0500, "PeterKetting"
<pet### [at] myrealbox com> wrote:
> Can anyone please explain the proper use of the inverse keyword?
From 3.5 documentation: "When the inverse keyword is used the inside of the
shape is flipped to become the outside and vice versa."
> The POV-Ray
> helpfile doesn't realy go into detail about it
So please specify what was complicated in above sentence :-)
> I wonder if it is the key
> to create more complex CSG objects.
Yes. It is one of components.
ABX
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wasn't there also an "inverse"-keyword for transformations ? ...
please let me cancel this post, if it's absolute nonsense ...
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In article <3c928702@news.povray.org>, "Jan Walzer" <jan### [at] lzernet>
wrote:
> wasn't there also an "inverse"-keyword for transformations ? ...
>
> please let me cancel this post, if it's absolute nonsense ...
There is in MegaPOV and POV-Ray 3.5. If you use "inverse" in the
transform {} block, you get the inverse of the transforms in that block.
This is part of the updated transform syntax.
--
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/
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"PeterKetting" <pet### [at] myrealboxcom> wrote in message
news:3c92420a@news.povray.org...
<snip>
A sphere is probably the easiest shape to understand the concept of inverse.
sphere{0,1} = a solid sphere centred at <0,0,0> with a radius of 1 pov unit
sphere{0,1 inverse} = a solid pov-universe with a small spherical hole at the
center....
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