Probably could arrange it in a prettier way...

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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Attachments:
Download 'mediawheel.jpg' (110 KB)

Preview of image 'mediawheel.jpg'

Very nice, Tim! This should go directly into the POV-Ray manual!

George


"Tim Cook" <z99### [at] bellsouthnet> wrote in message
news:3eb1e0eb@news.povray.org...
> Probably could arrange it in a prettier way...
>
> -- 
> Tim Cook
> http://home.bellsouth.net/p/PWP-empyrean
>
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
> N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
> PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
> D++(---) G(++) e*>++ h+ !r--- !y--
> ------END GEEK CODE BLOCK------
>


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i suppose there is a light in the middle? If so, this is realy usefull.

JWV
"Tim Cook" <z99### [at] bellsouthnet> wrote in message
news:3eb1e0eb@news.povray.org...
> Probably could arrange it in a prettier way...
>
> --
> Tim Cook
> http://home.bellsouth.net/p/PWP-empyrean
>
> -----BEGIN GEEK CODE BLOCK-----
> Version: 3.12
> GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
> N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
> PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
> D++(---) G(++) e*>++ h+ !r--- !y--
> ------END GEEK CODE BLOCK------
>


----------------------------------------------------------------------------
----

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Very nice idea! But I need more information to decode the wheel. Perhaps
because my media knowledge is small. Those spheres probably represent more
than the type of media. Also the strength of parameters? And what does the
white "cross" to the upper right represent?


Regards
Hugo

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> Probably could arrange it in a prettier way...

How about a cube? One axis for each of scattering, emission, and absoption.
Maybe with five or seven values each (instead of just three). This would
allow for things like "much scattering, less absorption and still less but
negative emission".


-- 
merge{#local i=-11;#while(i<11)#local
i=i+.1;sphere{<i*(i*i*(.05-i*i*(4e-7*i*i+3e-4))-3)10*sin(i)30>.5}#end
pigment{rgbt 1}interior{media{emission x}}hollow}//  Mark Weyer

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Tim Cook wrote:
> Probably could arrange it in a prettier way...
> 
> 
> ------------------------------------------------------------------------
> 
Clever idea!

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Mark Weyer wrote:
> How about a cube? One axis for each of scattering, emission, and absoption.

Cube doesn't lend itself to quick-glance interpretation.

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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Hugo Asm wrote:
> Very nice idea! But I need more information to decode the wheel. Perhaps
> because my media knowledge is small. Those spheres probably represent more
> than the type of media. Also the strength of parameters? And what does the
> white "cross" to the upper right represent?

The white cross to the upper right represents a slice of the
circle, with the dot/line/three dots accompanying each slice.
The innermost dot represents the absorption amount, the middle
dot emission, the outer dot scattering.  Red dot is a value of
-0.5, white dot is 0.0, green dot is +0.5.  Wheel designed to
show the difference between positive and negative values in
any given combination of media elements.

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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Tim Cook wrote:
>Probably could arrange it in a prettier way...
>

Very nice!

It is supposed to be like the color wheel right?  maybe the map key should
use RGB instead of RG and White then.  Just to make the image nicer, maybe
the media should be colored too.

So does the combination of attributes dettermine the values of a slice?
Like RRG is two thirds absorption, and one third scattering.  If so don't
you need one more value to compliet the chart... zero!  You are counting
from one to three, but there is no point where there is no media.  going
back to the color wheel analogy in the color wheel tone values are usualy
shown as black in the center, and white toward the rim of the wheel.

I think this wheel is the best discription I have ever seen on the different
types of media.  I look forward to seeing how you finish it.

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Very nice tool. And I was thinking negative emission would be the same 
as absorption... tsssss ;-)

The order is quite nice too, with the "symmetries" well chosen. I'll 
suggest another order which might be easier to read (or might not): 
starting from 12 o'clock and going clockwise, I'd go
  0, 0, 0
  0, 0,.5
  0,.5, 0
.5, 0, 0
.5,.5, 0
.5, 0,.5
  0,.5,.5
.5,.5,.5
...
(if I understood correctly, symmetries will take care of the rest.)

To improve readability, you might carve small S, E, A letters in the 
spheres or use letters directly. Other ideas, which are rather personal 
taste, include using white/gray/black instead of green/gray/red and 
keeping the spheres horizontal everywhere, always in the same order (SEA).

I do not fully understand the setting. Is the the wheel of constant 
depth and are the media of uniform densities? How is the light located? 
Is the wheel in front of (over) the spheres? Where do the glows come? Is 
there media outside the wheel?


Povingly,

Philippe

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