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OK, guys. Let me put it this way. My physics teacher, who was supposed to
help me understand the formulas I dug up off the Internet claims that he
only sleeps in this house and is never really there, so I won't be getting
any help from him, and I don't see any of my programmer friends on ICQ very
often lately (if I do, they're busy or falling asleep). I really would like
to add Blinn shading and, as far as I can tell, this shouldn't be too hard.
I am not a good programmer (as I have not been able to dedicate too much
time to this), so I am going to post the link I got, and pray that one of
you geniuses can add this to MegaPOV (and eventually OfficialPOV). Please
answer my call. Thanks.
Here's the main link: http://www-graphics.stanford.edu/courses/cs348b-97/
And here is the direct link:
http://www-graphics.stanford.edu/courses/cs348b-97/local/local2.html
Look for the "Torrence-Sparrow-Blinn-Cook" model. Good luck. =)
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Looking that stuff over the particle size thing for media would be great
wouldn't it? Adjustment from chunky dust to gases maybe, and using a
similar concept as the angle dependant reflections the way it reads there
anyhow. Interesting stuff anyhow, but what difference would such an
addition make to have that Torrence-Sparrow-Blinn-Cook thing in POV? To get
a more overall angle dependance using diffuse reflection as well?
Bob
"TonyB" <ben### [at] panama phoenixnet> wrote in message
news:385e52ba@news.povray.org...
> OK, guys. Let me put it this way. My physics teacher, who was supposed to
> help me understand the formulas I dug up off the Internet claims that he
> only sleeps in this house and is never really there, so I won't be getting
> any help from him, and I don't see any of my programmer friends on ICQ
very
> often lately (if I do, they're busy or falling asleep). I really would
like
> to add Blinn shading and, as far as I can tell, this shouldn't be too
hard.
> I am not a good programmer (as I have not been able to dedicate too much
> time to this), so I am going to post the link I got, and pray that one of
> you geniuses can add this to MegaPOV (and eventually OfficialPOV). Please
> answer my call. Thanks.
>
> Here's the main link: http://www-graphics.stanford.edu/courses/cs348b-97/
> And here is the direct link:
> http://www-graphics.stanford.edu/courses/cs348b-97/local/local2.html
>
> Look for the "Torrence-Sparrow-Blinn-Cook" model. Good luck. =)
>
>
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omniVERSE <inv### [at] aolcom> wrote...
> Looking that stuff over the particle size thing for media would be great
> wouldn't it? Adjustment from chunky dust to gases maybe, and using a
> similar concept as the angle dependant reflections the way it reads there
> anyhow.
Take a closer look at the media documentation. You _can_ adjust from chunky
dust to gases. From the docs:
"The integer value Type specifies one of five different scattering phase
functions representing the different models: isotropic, Mie (haze and murky
atmosphere), Rayleigh, and Henyey-Greenstein."
-Nathan
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Doesn't look too bad. Looks like a nice replacement for that old ugly phong
highlight model. I'll have a look, but no coding just yet.
-Nathan
TonyB <ben### [at] panamaphoenixnet> wrote...
> OK, guys. Let me put it this way. My physics teacher, who was supposed to
> help me understand the formulas I dug up off the Internet claims that he
> only sleeps in this house and is never really there, so I won't be getting
> any help from him, and I don't see any of my programmer friends on ICQ
very
> often lately (if I do, they're busy or falling asleep). I really would
like
> to add Blinn shading and, as far as I can tell, this shouldn't be too
hard.
> I am not a good programmer (as I have not been able to dedicate too much
> time to this), so I am going to post the link I got, and pray that one of
> you geniuses can add this to MegaPOV (and eventually OfficialPOV). Please
> answer my call. Thanks.
>
> Here's the main link: http://www-graphics.stanford.edu/courses/cs348b-97/
> And here is the direct link:
> http://www-graphics.stanford.edu/courses/cs348b-97/local/local2.html
>
> Look for the "Torrence-Sparrow-Blinn-Cook" model. Good luck. =)
>
>
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Oh, okay, yeah. I knew about those, one of my favorites is the eccentricity
in Henyey-Greenstein 'type 5', just thinking more in terms of the =grain= as
being more or less the abstract equivalent to a measurable object per
=grain= as it were. That and along with the shading, or hilighting,
described at that web page. Kind of causes me to wander into futile mental
exercises.
You have to keep in mind I only dabble in trying to understand it all.
Bob
"Nathan Kopp" <Nat### [at] Koppcom> wrote in message
news:385efd72@news.povray.org...
> omniVERSE <inv### [at] aolcom> wrote...
> > Looking that stuff over the particle size thing for media would be great
> > wouldn't it? Adjustment from chunky dust to gases maybe, and using a
> > similar concept as the angle dependant reflections the way it reads
there
> > anyhow.
>
> Take a closer look at the media documentation. You _can_ adjust from
chunky
> dust to gases. From the docs:
> "The integer value Type specifies one of five different scattering phase
> functions representing the different models: isotropic, Mie (haze and
murky
> atmosphere), Rayleigh, and Henyey-Greenstein."
>
> -Nathan
>
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>Doesn't look too bad. Looks like a nice replacement for that old ugly
phong
>highlight model. I'll have a look, but no coding just yet.
Cool. Thanks. Just that I would add it to POV instead of replacing phong
(backward compatibility, you know).
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