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From: Ken
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 09:03:25
Message: <3889B7FC.E05C8BE3@pacbell.net>
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Bill DeWitt wrote:
> Why am I the only one who likes my jokes 8-(
Some people are good story tellers. Others are, well you get the picture...
--
Ken Tyler - 1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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On Sat, 22 Jan 2000 05:02:32 -0800, Ken wrote:
>
>
>"Ronald L. Parker" wrote:
>
>> That said, there was a patch for POV 2.2 that purported to support at
>> least part of the Renderman Shading Language, though attempts to port
>> it to 3.0 were unsuccessful, to say the least.
>>
>> There are a couple of major stumbling blocks to a successful
>> implementation of RSL, not the least of which is the problem of POV
>> not having access to some of the special variables that are considered
>> standard in a shader. For example, there are u, v, du, dv, dPdu,
>> dPdv... These are all meaningless when POV doesn't have u-v texture
>> mapping.
>
>Has this situation changed with the addition of UV mapping to MegaPov ?
To some extent, but not entirely. If UV mapping applied to all objects,
it would be a good start. But we still need du, dv, dPdu, dPdv, etc.
which we can probably best get by implementing differential tracing.
Don't worry, the POV-Team isn't ignoring the requests to make shading
more powerful for some future version (not 3.5!) but the final result
might not be RSL. Don't ask for more informationon this, as more
information does not exist.
--
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html
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From: Ken
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 11:24:30
Message: <3889D90C.1CDA49E@pacbell.net>
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Ron Parker wrote:
> >Has this situation changed with the addition of UV mapping to MegaPov ?
>
> To some extent, but not entirely. If UV mapping applied to all objects,
> it would be a good start. But we still need du, dv, dPdu, dPdv, etc.
> which we can probably best get by implementing differential tracing.
> Don't worry, the POV-Team isn't ignoring the requests to make shading
> more powerful for some future version (not 3.5!) but the final result
> might not be RSL.
I already replied there was not much if any chance of it making it into
v3.5 and only a possibility for 4.0. I did mention that if anyone would
like to patch POV-Ray with this feature that the POV-Team would be happy
to evaluate it :)
> Don't ask for more informationon this, as more information does not exist.
I am happy with your reply.
--
Ken Tyler - 1300+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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From: Bill DeWitt
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 11:49:03
Message: <3889df7f@news.povray.org>
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"Ken" <tyl### [at] pacbell net> wrote :
>
> Some people are good story tellers. Others are, well you get the
picture...
>
Hmm... I can't figure out what you mean by this....
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From: Peter Warren
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 13:34:39
Message: <3889f83f@news.povray.org>
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Bill DeWitt wrote in message <3889b808@news.povray.org>...
> Why am I the only one who likes my jokes 8-(
regrettably I must confess to enjoying you jokes.
That 'r' shoud be in CAPS.
someone who has no place with Parker, DeWitt and Tyler.
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From: mr art
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 13:45:22
Message: <3889FAE3.CA30DBBD@gci.net>
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Sounds like a law firm or something.
Peter Warren wrote:
>Parker, DeWitt and Tyler.<
--
Mr. Art
"Often the appearance of reality is more important
than the reality of the appearance."
Bill DeWitt 2000
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From: ingo
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 13:58:30
Message: <8EC3CC2EDseed7@204.213.191.228>
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Ken wrote:
>"Ronald L. Parker" wrote:
>
>> That said, there was a patch for POV 2.2 that purported to support at
>> least part of the Renderman Shading Language,..
>
>I announced the existence of the POV-Ray Tag on the IRTC mailing list
>yesterday and within 2 hrs. got a request for programmable shaders :)
What are programmable shaders?
Can sombody try explain this to me in laymens terms, or point me to a page
that does so. I did a (very) quick search this morning but found only stuff
that needs at least a basic understanding of shaders. And that I do not
have.
Ingo
--
Photography: http://members.home.nl/ingoogni/
Pov-Ray : http://members.home.nl/seed7/
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From: Peter Warren
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 14:43:01
Message: <388a0845@news.povray.org>
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mr.art wrote in message <3889FAE3.CA30DBBD@gci.net>...
>Sounds like a law firm or something.
>
>Peter Warren wrote:
>>Parker, DeWitt and Tyler.<
I miss spoke.
That would be
"Xander, Parker, DeWitt and Tyler"
So sue me, I'm an idiot.
No refection.
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From: Peter Warren
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 15:21:22
Message: <388a1142@news.povray.org>
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your
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From: Bill DeWitt
Subject: Re: SHADERS: Please make POVRAY support Plugins SHADERS in the future release
Date: 22 Jan 2000 15:27:35
Message: <388a12b7@news.povray.org>
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"Peter Warren" <int### [at] halcyoncom> wrote :
>
> someone who has no place with Parker, DeWitt and Tyler.
>
I hope you are talking about posting frequency, or something like that.
Because if you are talking about POV skills, I have to tell you that I do
not have half the skills of Ken. And I am fairly confident that Ken will
tell you that he doesn't have half the skills of Ron.
If you can rub two mirrored spheres together you have caught up with
me...
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