"alphaQuad" <alp### [at] earthlinknet> wrote:
> Glory be. Is that a rainbow cast on D5, zoom in and render the one piece that is
> doing it and enlarge.

Rendering right now.  Should be done tomorrow morning.

> glass dispersion ... according to consts.inc  ... 40 times with the wavelengths
> reversed
> got it. thank you. must be time to look at dispersion.

Please find attached some source code.  As explained in the file, it's not
exactly what i used, but it does essentially the same thing.  Run with
declare=Disp=-40 on the command line.  Have fun!

Warning: dispersion is SLOW.  Slower than anything you've done (unless you've
messed with parametrics).

> you rock.

Thanks!

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Attachments:
Download 'chess_caustics-sim.pov.txt' (6 KB)

"Cousin Ricky" <ric### [at] yahoocom> wrote:
> "alphaQuad" <alp### [at] earthlinknet> wrote:
> > Glory be. Is that a rainbow cast on D5, zoom in and render the one piece that is
> > doing it and enlarge.
>
> Rendering right now.  Should be done tomorrow morning.
>
> > glass dispersion ... according to consts.inc  ... 40 times with the wavelengths
> > reversed
> > got it. thank you. must be time to look at dispersion.
>
> Please find attached some source code.  As explained in the file, it's not
> exactly what i used, but it does essentially the same thing.  Run with
> declare=Disp=-40 on the command line.  Have fun!
>
> Warning: dispersion is SLOW.  Slower than anything you've done (unless you've
> messed with parametrics).
>
> > you rock.
>
> Thanks!


Translated =
1 + -40 * (1.012 - 1) = .52

Yah I tried .1 and .05, anything around 1 is no wavelength, and smaller is more


   #local Rbow = 1 + Disp * (Quartz_Glass_Dispersion - 1);
   interior
   {  ior 1.5 dispersion Rbow

So much to forget, so little time. Only 2 hrs left on a bigger one. Impressive.

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"Cousin Ricky" <ric### [at] yahoocom> wrote:
> Please find attached some source code.  As explained in the file, it's not
> exactly what i used, but it does essentially the same thing.  Run with
> declare=Disp=-40 on the command line.  Have fun!

Correction: add the following line to the light_source:

   area_light 0.6 * x, 0.6 * y, 9, 9 circular orient adaptive 1

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"alphaQuad" <alp### [at] earthlinknet> schreef in bericht 
news:web.48b42c3773b1f4597cc322e60@news.povray.org...
>
> ah the wonder of computers, I silk screened it on to a single piece of 
> wood, we
> can imagine. I did some bevel jobs but so far always with white spots.
>
Sure. Still, I would prefer a board made of separate squares.... :-)

Thomas

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alphaQuad wrote:
> so commented, I just know good code when I see it. so you got this web site
> where I must have seen it. so many possibilities, so little time, on to
> dispersion.

  What bothered me is that you posted the code without any mention
whatsoever that it was not written by you. Any reader can very easily
get the impression that you wrote that code. Just a short "this was not
written by me, I got this from somewhere" would have been nice.

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would have bet only 3-4hrs at first, actually twice that

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Attachments:
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"Thomas de Groot" <t.d### [at] internlDOTnet> wrote:
> "alphaQuad" <alp### [at] earthlinknet> schreef in bericht
> news:web.48b42c3773b1f4597cc322e60@news.povray.org...
> >
> > ah the wonder of computers, I silk screened it on to a single piece of
> > wood, we
> > can imagine. I did some bevel jobs but so far always with white spots.
> >
> Sure. Still, I would prefer a board made of separate squares.... :-)
>
> Thomas

Simple fix really. I dont remember where I saw it. Think it was the first script
I looked at.

Just add: translate <8,0,0>
to one of the pigments.

We should erect a shrine to the inventor of that one, if it really was a
contribution to the collective, because I use it all the time.

Images of Sheen Esteves, of Jimmy Neutron fame, with huge swollen head floating
on his throne holding Libby captive.

aQ

STOP using my electricity, I invented it and have a Patent.
Thomas Alva Edison = Aha Ions Made Volts

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On Tue, 26 Aug 2008 14:12:59 -0400, Cousin Ricky wrote:

>> I would have if I could remember where. Took me half hour to find it
>> where I couldnt remember where I left it on this puter.
> 
> My memory stinks.  That's why i write things down.  Specifically,
> whenever i lift an algorithm or segment of code, i comment directly into
> the code where it came from.  Whenever i download code off povray.org, i
> make sure that--somehow--the source of the code is noted.

Yeah, that was my thought as well.  If you save off someone else's code, 
make sure there's a comment included with it to indicate where it came 
from.  Then you don't have to research to find out where you got it from.

Unless the initial intent, of course, is not to give credit where it's 
due....

Jim

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On Wed, 27 Aug 2008 10:01:51 +0200, Thomas de Groot wrote:

> Sure. Still, I would prefer a board made of separate squares....

I want to say that most of the chessboards I've seen made out of wood 
tend to have the grain rotated 90 degrees between the light and dark 
squares.  Makes for a nice effect.

Jim

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On Tue, 26 Aug 2008 13:01:04 -0400, alphaQuad  
<alp### [at] earthlinknet> wrote:

> Glory be. Is that a rainbow cast on D5, zoom in and render the one piece  
> that is
> doing it and enlarge.

Here you go.  Dispersion is turned on for the black knight, and turned off  
for everything else (lest the render take all week).

> glass dispersion ... according to consts.inc  ... 40 times with the  
> wavelengths
> reversed

I had actually started a +40 run, and it had gone 3 hours before i noticed  
the mistake.  I figured i might as well post both images.

As you can see, at this resolution, the dispersion_samples was way too  
low.  Got another week?



-- 
<Insert witty .sig here>

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Attachments:
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Preview of image 'chess_caustics+detail.jpg'