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Is there a way to blob / smooth / blur a pigment when it's projected onto an
isosurface? The 2 blobbing techniques I know of, don't work.
Hugo
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From: Christoph Hormann
Subject: Re: Smoothing pigments in isosurface?
Date: 6 Dec 2001 11:20:58
Message: <3C0F9B1C.77DE7A0B@gmx.de>
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Hugo wrote:
>
> Is there a way to blob / smooth / blur a pigment when it's projected onto an
> isosurface? The 2 blobbing techniques I know of, don't work.
>
I'm not really sure what you want to do, but i persume you are talking
about using pigment functions in isosurfaces.
You can try to blur a function by taking additional 'samples' and
averaging them. Chris Huff and myself have worked on doing this in Povray
internally, but it is perfectly possible in SDL too. Of course this can
be quite slow because of the additional evaluations of the pigment
function.
If that's not what your question was about please rephrase it.
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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>> I'm not really sure what you want to do, but i persume you are talking
>> about using pigment functions in isosurfaces.
Thanks, that was what I meant. :o)
I tried averaging pigments in a circle formation but it's not smooth enough
for isosurfaces. I hoped there was a mathematical way to blob pigments ala
other shapes in isosurfaces.. I think it would be very useful.. Imagine a 3d
pigment taken from an object-pattern (though, until now object patterns are
only 2d..) Then we could describe an object with ordinary POV primitives,
make it a 3d pattern and blob that shape in an isosurface.
Hugo
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From: Christoph Hormann
Subject: Re: Smoothing pigments in isosurface?
Date: 7 Dec 2001 09:48:39
Message: <3C10D6C3.AF5EDBFF@gmx.de>
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Hugo wrote:
>
> Thanks, that was what I meant. :o)
> I tried averaging pigments in a circle formation but it's not smooth enough
> for isosurfaces. I hoped there was a mathematical way to blob pigments ala
> other shapes in isosurfaces.. I think it would be very useful.. Imagine a 3d
> pigment taken from an object-pattern (though, until now object patterns are
> only 2d..) Then we could describe an object with ordinary POV primitives,
> make it a 3d pattern and blob that shape in an isosurface.
As you can probably imagine you are not the first one considering this...
;-)
Apart from the obvious practical problems you should note that there are
principal reasons why this will always be slower than using the
appropriate isosurface function directly.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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