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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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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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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your

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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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I would welcome shaders.

I also hope they do not happen, at least for a while.


Peter (Oh, what a wimp)Warren

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Bill DeWitt wrote in message <388a12b7@news.povray.org>...

>    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...

I am fairly confident that Ken would tell you that he does not
have 1/10th the skills of Ron. (And then he would be boasting).

I also believe that if you rubbed two mirrored spheres
together you would produce an interesting image.
More interesting than the one I would produce, no doubt.

I know that you have made me laugh, more than once,
more than twice.

For this I thank and respect you.

I can say no more.

Peter Warren

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Am I right if I say :
The required skills to program a shader are almost equal to
the skills required to program a new texture/pattern into the
core Povray code ?

After all, and if I understood well, renderman shaders must
be compiled with an ordinary C++ compiler, and they are -sort of-
dynamically linked to the renderer (who gives some data to
the shader, and get a pixel color or some other data in return).

About UV-stuff, the renderers that have shaders usually have only
a few types of primitives : nurbs, bicubic things,...  And we know
that some Pov privitives CAN'T be UV-mapped : julias,...

Fabien.

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On Sat, 22 Jan 2000 15:27:34 -0500, Bill DeWitt wrote:
>
>"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.

And I don't have half the skills of Gilles Tran or SamuelT or Mick
Hazelgrove.  It's all relative.

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html

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On Sat, 22 Jan 2000 22:30:59 +0100, Fabien Mosen wrote:
>Am I right if I say :
>The required skills to program a shader are almost equal to
>the skills required to program a new texture/pattern into the
>core Povray code ?

Pretty much, yeah.  Maybe more, if the trend goes toward self-
antialiasing shaders a'la those that Larry Gritz has made.

>After all, and if I understood well, renderman shaders must
>be compiled with an ordinary C++ compiler, and they are -sort of-
>dynamically linked to the renderer (who gives some data to
>the shader, and get a pixel color or some other data in return).

Not exactly.  They're compiled into bytecode (IIRC) by the shader
compiler, which is not really a C compiler.  They're then executed
by the renderer pretty much as you say.

>About UV-stuff, the renderers that have shaders usually have only
>a few types of primitives : nurbs, bicubic things,...  And we know
>that some Pov privitives CAN'T be UV-mapped : julias,...

Right.  RIB only allows for a small subset of objects with easy UV
mappings.  But even some of those objects don't have UV code written
yet in MegaPOV.  One could always warn that a shader that expected
uv coordinates wouldn't work properly on a non-UV-enabled object.

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html

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