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From: Tor Olav Kristensen
Subject: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 16:29:35
Message: <3AD87920.DE49F9FF@hotmail.com>
This is the same type of Iso as the in my 
"Spherical Splash" image:

http://news.povray.org/3AA41C10.55F23524%40hotmail.com

(Sorry, but no radiosity this time.)

Now I have rotated the pigment in the same 
noisy way as the iso is rotated.

But I think that I could have achieved the 
same effect for this shape if I had made 
the colour of the pigment change as a 
function of the distance from the sphere
centre (radially changing pigment colour ?).

Comments are welcome.


-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


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From: Alberto
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 18:41:15
Message: <3AD89999.67A4FBBD@usb.ve>
I like this one :-)

Alberto.


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From: Tor Olav Kristensen
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 18:52:10
Message: <3AD89A95.A0990F56@hotmail.com>
JRG wrote:
> 
> It's really cool.

Thank you !


> How you did it ? Pigment function?

The shape is done in MegaPOV by first randomly 
displacing the surface of an iso-sphere with the 
the noise3d() function, and then using 3 other 
random functions to feed a general rotation 
function with random angles so that it rotates 
each point on the iso-surface randomly around 
each of the x, y, and z -axes.

You may look at the source code that I posted 
to povray.text.scene-files 10. March this year:

http://news.povray.org/3aa9fa11%40news.povray.org
http://news.povray.org/3AAA03E6.6ECB760B%40hotmail.com


The pigment is done with a pigment function 
that are fed with the same rotated coordinates.

I can post the source for if anyone is interested.


> Waiting for the radiosity version (I couldn't appreciate the first one,

Uhhmmm... Unfortunately I only have access to my 
private PC right now. And it's WAY too slow for 
a radiosity version. (Maybe I'll do it on my 
much faster PC at work when the easter is over.)


-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


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From: Tor Olav Kristensen
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 18:56:56
Message: <3AD89BB8.BB48CBD6@hotmail.com>
Alberto wrote:
> 
> I like this one :-)

I'm glad you do.

Thanks !


-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


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From: Tek
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 19:14:47
Message: <3ad8a1a7@news.povray.org>
Until now I've resisted the urge to use megapov. But this image has
converted me :)

It's gorgeous. Can you animate it?

--
Tek
http://www.evilsuperbrain.com


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From: Tor Olav Kristensen
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 19:33:30
Message: <3AD8A447.298815CB@hotmail.com>
Tek wrote:
> 
> Until now I've resisted the urge to use megapov. But this image has
> converted me :)

Hehe. This sounds a lot like me. I managed to 
resist the temptation to start using MegaPOV 
from March to October last year :)


> It's gorgeous. Can you animate it?

Thank you !

Yes it can be animated; e.g. by slowly shifting 
the origin of the rotation functions or the 
first surface-displacement function. And maybe 
it would be cool if the colors were cycled in 
a "pulsing" way from the inside and out at the 
same time.

But now I'm dreaming... I don't have a PC to 
do such stuff here at the moment :(


-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


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From: Sander
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 21:33:13
Message: <MPG.1542e0777a6cfe6d989737@NEWS.POVRAY.ORG>
In article <3AD87920.DE49F9FF@hotmail.com>, Tor Olav Kristensen says...
> 
> This is the same type of Iso as the in my 
> "Spherical Splash" image:
> 
> http://news.povray.org/3AA41C10.55F23524%40hotmail.com
> 
> (Sorry, but no radiosity this time.)
> 
> Now I have rotated the pigment in the same 
> noisy way as the iso is rotated.
> 
> But I think that I could have achieved the 
> same effect for this shape if I had made 
> the colour of the pigment change as a 
> function of the distance from the sphere
> centre (radially changing pigment colour ?).
> 
> Comments are welcome.
> 
> 
> 
You did it again: very very real-looking, though i don't expect to see 
it around ever! Very good :))
-- 
Regards,  Sander


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From: Jamie Davison
Subject: Re: Rotating the pigment too (51 KB)
Date: 14 Apr 2001 21:51:32
Message: <MPG.1542d6c29b964ec69898c2@news.povray.org>
> Yes it can be animated; e.g. by slowly shifting 
> the origin of the rotation functions or the 
> first surface-displacement function. And maybe 
> it would be cool if the colors were cycled in 
> a "pulsing" way from the inside and out at the 
> same time.
> 
> But now I'm dreaming... I don't have a PC to 
> do such stuff here at the moment :(

I don't know if you read povray.general, but I just upgraded my machine, 
and want something to test it on.  Fling me the source to my email, and 
I'll have a go at rendering it and posty the resultant .mpg to p.b.a.

Bye for now,
     Jamie.


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From: Tor Olav Kristensen
Subject: Re: Rotating the pigment too (51 KB)
Date: 15 Apr 2001 00:36:22
Message: <3AD8EB3F.A9B5148E@hotmail.com>
Sander wrote:
>...
> You did it again: very very real-looking, though i don't expect to see
> it around ever! Very good :))

Thanks again Sander !

Maybe it'll come to you in one of your dreams...


-- 
Goodnight from 

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


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From: Tor Olav Kristensen
Subject: Re: Rotating the pigment too (51 KB)
Date: 15 Apr 2001 00:43:17
Message: <3AD8ECE1.C2CC570B@hotmail.com>
Jamie Davison wrote:
> 
> > Yes it can be animated; e.g. by slowly shifting
> > the origin of the rotation functions or the
> > first surface-displacement function. And maybe
> > it would be cool if the colors were cycled in
> > a "pulsing" way from the inside and out at the
> > same time.
> >
> > But now I'm dreaming... I don't have a PC to
> > do such stuff here at the moment :(
> 
> I don't know if you read povray.general, but I just upgraded my machine,
> and want something to test it on.  Fling me the source to my email, and
> I'll have a go at rendering it and posty the resultant .mpg to p.b.a.

Thank you very much for your offer Jamie.

I've been out for a couple of beers,
so I'm not able to make POV-animations
at the moment  =)

Now I'll have some sleep and then I'll
see of I can find time tomorrow to 
refresh my animation skills and code 
some animation of my iso-mess.

-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


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