POV-Ray : Newsgroups : povray.advanced-users : Colefax Galaxy Include and 3.5/3.6 Server Time
31 Oct 2024 21:22:36 EDT (-0400)
  Colefax Galaxy Include and 3.5/3.6 (Message 1 to 5 of 5)  
From: Joe Moon
Subject: Colefax Galaxy Include and 3.5/3.6
Date: 8 Dec 2004 23:12:34
Message: <41b7d0b2$1@news.povray.org>
I love the Galaxy include file by Chris Colefax, but since 3.5 came out, 
things don't render quite the same.  With background nebulas, I 
sometimes get a weird wiggly cut-off across the horizontal center of the 
picture.

I've included an attachment to show what I mean.  Has anyone else 
noticed this, and possibly figured out a fix?


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Attachments:
Download 'galaxy_bug.jpg' (7 KB)

Preview of image 'galaxy_bug.jpg'
galaxy_bug.jpg


 

From: Qfyd
Subject: Re: Colefax Galaxy Include and 3.5/3.6
Date: 9 Dec 2004 05:18:22
Message: <41b8266e$1@news.povray.org>
It would appear that some pattern it used has not had a waveform 
explicitly defined. As such it's using a sawtooth wave - which is what 
you're seeing. That discontinuity is where the wave begins again.

I don't know these include files very well but I'd guess that somewhere 
in one layer of the texture theres a marble pattenr used which needs to 
be given the sine_wave modifier.

-Qfyd

Joe Moon wrote:
> I love the Galaxy include file by Chris Colefax, but since 3.5 came out, 
> things don't render quite the same.  With background nebulas, I 
> sometimes get a weird wiggly cut-off across the horizontal center of the 
> picture.
> 
> I've included an attachment to show what I mean.  Has anyone else 
> noticed this, and possibly figured out a fix?


Post a reply to this message

From: Tim Riley
Subject: Re: Colefax Galaxy Include and 3.5/3.6
Date: 9 Dec 2004 18:36:08
Message: <41b8e168$1@news.povray.org>
Joe Moon wrote:
> I love the Galaxy include file by Chris Colefax, but since 3.5 came out, 
> things don't render quite the same.  With background nebulas, I 
> sometimes get a weird wiggly cut-off across the horizontal center of the 
> picture.
> 
> I've included an attachment to show what I mean.  Has anyone else 
> noticed this, and possibly figured out a fix?

It's due to the change in how the "gradient" function operates (from v3.1 to 3.5 
I think, or was it 3.0 to 3.1?). Somewhere in the include/macro files, the 
gradient function is used one or more times (I don't remember the specifics). 
Find it(them) and change "gradient y" (or x or z) to "function { abs(y) }" (or x 
or z).


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From: Slime
Subject: Re: Colefax Galaxy Include and 3.5/3.6
Date: 9 Dec 2004 18:50:42
Message: <41b8e4d2@news.povray.org>
> It's due to the change in how the "gradient" function operates (from v3.1
to 3.5
> I think, or was it 3.0 to 3.1?). Somewhere in the include/macro files, the
> gradient function is used one or more times (I don't remember the
specifics).
> Find it(them) and change "gradient y" (or x or z) to "function { abs(y) }"
(or x
> or z).

Crazy... I made almost the exact same post in povray.general. =)

Speaking of which, Joe, please don't multipost...

 - Slime
 [ http://www.slimeland.com/ ]


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From: Joe Moon
Subject: Re: Colefax Galaxy Include and 3.5/3.6
Date: 9 Dec 2004 23:05:24
Message: <41b92084$1@news.povray.org>
Slime wrote:
>> It's due to the change in how the "gradient" function operates
>> (from v3.1
> 
> to 3.5
> 
>> I think, or was it 3.0 to 3.1?). Somewhere in the include/macro
>> files, the gradient function is used one or more times (I don't
>> remember the
> 
> specifics).
> 
>> Find it(them) and change "gradient y" (or x or z) to "function {
>> abs(y) }"
> 
> (or x
> 
>> or z).

> 
> Crazy... I made almost the exact same post in povray.general. =)
> 
> Speaking of which, Joe, please don't multipost...
> 
> - Slime [ http://www.slimeland.com/ ]

That seems to have done the trick, though I think there are still subtle
differences in the results of the Galaxy include since 3.1.

Sorry for the cross-post - first time in these newsgroups, and there's 
just so darn many, I wasn't sure where to go.  So I'll just thank 
everyone on this thread :)


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