POV-Ray : Newsgroups : povray.bugreports : one source, two images Server Time
7 Dec 2023 08:50:12 EST (-0500)
  one source, two images (Message 1 to 6 of 6)  
From: jr
Subject: one source, two images
Date: 18 Nov 2023 11:55:00
Message: <web.6558eb62bdeec745f11225116cde94f1@news.povray.org>
hi,

when rendering WFP's "op art" scene[*] from 2014, I get different images,
depending whether I use a "stock" POV-Ray (3.8, both alpha and beta.2), or WFP's
own (6e4ed6c2), see attached.

[*] <https://news.povray.org/53b35d39%40news.povray.org>

regards, jr.


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Attachments:
Download '140701_same_source.png' (2780 KB)

Preview of image '140701_same_source.png'
140701_same_source.png


 

From: jr
Subject: Re: one source, two images
Date: 19 Nov 2023 02:00:00
Message: <web.6559b2551cb2cd1df11225116cde94f1@news.povray.org>
"jr" <cre### [at] gmailcom> wrote:
> when rendering WFP's "op art" scene[*] from 2014, I get different images,
> depending whether I use a "stock" POV-Ray (3.8, both alpha and beta.2), or WFP's
> own (6e4ed6c2), see attached.

version 3.7.0.8 works as intended, from 3.7.1-rc.1 the results/images differ.


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From: William F Pokorny
Subject: Re: one source, two images
Date: 19 Nov 2023 02:15:46
Message: <6559b622$1@news.povray.org>
On 11/18/23 11:50, jr wrote:
> hi,
> 
> when rendering WFP's "op art" scene[*] from 2014, I get different images,
> depending whether I use a "stock" POV-Ray (3.8, both alpha and beta.2), or WFP's
> own (6e4ed6c2), see attached.
> 
> [*] <https://news.povray.org/53b35d39%40news.povray.org>
> 
> regards, jr.

Hi.

v3.7 renders the bottom version too.

My vague recollection is that some time during v3.71->v3.8 development a 
typo was introduced somewhere in the class set up for the spiral 1 & 2 
patterns. We ended up with two spiral1(s) or two spiral2(s) instead of 
one of each - or something similar to that. Likely in pattern.h or 
pattern.cpp or both.

I thought I'd mentioned it somewhere out here in the news groups, but 
looks like I did not add the fix to any of my commit messages - so maybe 
not.  I was just something I saw while working on other issues.

I'm fighting a northern hemisphere cold/flu/bug at the moment so I don't 
feel like doing any more rooting around.

Bill P.


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From: jr
Subject: Re: one source, two images
Date: 19 Nov 2023 06:45:00
Message: <web.6559f4c81cb2cd1df11225116cde94f1@news.povray.org>
hi,

William F Pokorny <ano### [at] anonymousorg> wrote:
> ...
> I'm fighting a northern hemisphere cold/flu/bug at the moment so I don't
> feel like doing any more rooting around.

perhaps I ought to have tried to render a "get well soon" card :-), best wishes.


regards, jr.


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From: Cousin Ricky
Subject: Re: one source, two images
Date: 19 Nov 2023 19:59:24
Message: <655aaf6c@news.povray.org>
On 2023-11-19 03:15 (-4), William F Pokorny wrote:
> 
> My vague recollection is that some time during v3.71->v3.8 development a
> typo was introduced somewhere in the class set up for the spiral 1 & 2
> patterns. We ended up with two spiral1(s) or two spiral2(s) instead of
> one of each - or something similar to that. Likely in pattern.h or
> pattern.cpp or both.

This is a montage of renders of the scene with the POV-Ray versions that
I have, plus 3 versions of UberPOV along the bottom row.  From these, it
appears that the bug was introduced prior to the release candidate phase
of 3.7.1, but after whichever version of 3.7.1 that the latest UberPOV
was based on.


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Attachments:
Download 'wfp-op_art.montage.jpg' (1465 KB)

Preview of image 'wfp-op_art.montage.jpg'
wfp-op_art.montage.jpg


 

From: Kenneth
Subject: Re: one source, two images
Date: 21 Nov 2023 14:10:00
Message: <web.655cff811cb2cd1d9b4924336e066e29@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:
>
> This is a montage of renders of the scene with the POV-Ray versions that
> I have, plus 3 versions of UberPOV along the bottom row.  From these, it
> appears that the bug was introduced prior to the release candidate phase
> of 3.7.1, but after whichever version of 3.7.1 that the latest UberPOV
> was based on.

I like the black one best (hee hee). That one must be from POV-ray
version -001...

William, I hope you feel better soon! Having the flu is no fun.


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