I guess it is best to move the conservation to the images group:

http://news.povray.org/povray.binaries.images/thread/%3Cweb.59f0ee4b3a8b1675667cbe5f0%40news.povray.org%3E/

I hope to be hearing from you there :)

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Oh my word, I have to apologize a hundred times! I somehow did not notice the
button "Go to next X messages", so that I overlooked any of your messages after
my coding example... And there are so many of them!

I'll go through them and try to address everthing. Thank you very much...

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Tor Olav <tor### [at] TOBEREMOVEDgmailcom> wrote:
> Hi
>
> Back in 2003 Jaap Frank made some nice and interesting media images that
> might be relevant to you.
>
> See this thread:
> Newsgroup: povray.binaries.scene-files
> Subject: Quantum Waves in Media
> From: Jaap Frank
> Date: 12 Jan 2003 04:45:23
>
> Here's a link to that thread in the web interface:
>
http://news.povray.org/povray.binaries.scene-files/thread/%3C3e20f2e3%40news.povray.org%3E/
>
> You'll find both images and code in that thread.
>
> --
> Tor Olav
> http://subcube.com
>


Hi Tor Olav,

thank you very much for pointing that out! I had a look at the files, but
somehow I cannot figure out how to find anything that helps me :( Maybe I don't
have enough practice in Pov-ray coding, I think you all would call me an
absolute beginner. So I see how far I can go with Bald Eagles suggestions and
maybe it is better to discuss some code of mine (I'll try to post better code
next time :) )

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"cbpypov" <nomail@nomail> wrote:

> Hi Tor Olav,
>
> thank you very much for pointing that out! I had a look at the files, but
> somehow I cannot figure out how to find anything that helps me :( Maybe I don't
> have enough practice in Pov-ray coding, I think you all would call me an
> absolute beginner. So I see how far I can go with Bald Eagles suggestions and
> maybe it is better to discuss some code of mine (I'll try to post better code
> next time :) )

TOK, thanks for posting that link - I had forgotten about that scene and how it
was rendered.  As a [former] chemist, it's one I remember well!  :)

Ignore most of the top part of that scene, as it's mostly just setting up the
quantum mechanical spherical harmonics for the different wave functions of the
electron orbital shells.
So, basically there's a lot of stuff, and then that all gets boiled down to a
function. I posted the line from Jaap's code in my last post showing how he uses
that function to shape his media rather than the spherical function.

The spherical function is of course sqrt( pow(x,2)+pow(y,2)+pow(z,2))-Radius = 0

#declare Fade = function {Radius - sqrt( pow(x,2)+pow(y,2)+pow(z,2))}

ought to give you scalar values that start at Radius and fade to zero at the
radius of the sphere.  Use that as your density function [for now] ;)

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> TOK, thanks for posting that link - I had forgotten about that scene and how it
> was rendered.  As a [former] chemist, it's one I remember well!  :)
>
> Ignore most of the top part of that scene, as it's mostly just setting up the
> quantum mechanical spherical harmonics for the different wave functions of the
> electron orbital shells.
> So, basically there's a lot of stuff, and then that all gets boiled down to a
> function. I posted the line from Jaap's code in my last post showing how he uses
> that function to shape his media rather than the spherical function.
>
> The spherical function is of course sqrt( pow(x,2)+pow(y,2)+pow(z,2))-Radius = 0
>
> #declare Fade = function {Radius - sqrt( pow(x,2)+pow(y,2)+pow(z,2))}
>
> ought to give you scalar values that start at Radius and fade to zero at the
> radius of the sphere.  Use that as your density function [for now] ;)


Please see my posts in the image section: I was using exponential decay before I
saw your linear decay example given here. I think exp might be a little smoother
and the glowing is now rather nice :)

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