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When the render window is maximized, the image is stretched to the limits
of the display area without regard for the image aspect ratio. This bug
most noticable (any most annoying) when creating portrait- or panorama-
format images.
This bug can be demonstrated by rendering scenes\qtvr\qtvrPanorama.pov and
maximizing the render window.
HW: Win2K running on a Celeron 400 CPU with 128MB ram.
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From: Warp
Subject: Re: bug: render window doesn't preserve image aspect ratio
Date: 7 Sep 2001 20:59:19
Message: <3b996d66@news.povray.org>
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QQ <now### [at] nowhere no> wrote:
: When the render window is maximized, the image is stretched to the limits
: of the display area without regard for the image aspect ratio.
Are you sure this should be considered a bug?
If you specify a window aspect ratio different from the image aspect ratio,
what should POV-Ray do? I think the current behaviour is as good as any other.
--
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}// - Warp -
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Warp wrote:
>
> QQ <now### [at] nowhereno> wrote:
> : When the render window is maximized, the image is stretched to the limits
> : of the display area without regard for the image aspect ratio.
>
> Are you sure this should be considered a bug?
It is not a bug rather it is a behaviour. I don't ever recall it working
differently.
--
Ken Tyler
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Warp <war### [at] tagpovrayorg> wrote in news:3b996d66@news.povray.org:
> QQ <now### [at] nowhereno> wrote:
>: When the render window is maximized, the image is stretched to the
>: limits of the display area without regard for the image aspect ratio.
> Are you sure this should be considered a bug?
> If you specify a window aspect ratio different from the image aspect
> ratio, what should POV-Ray do?
I'd suggest that Pov duplicate the 'preserve aspect ratio' feature
available in most image viewers: enlarge the size of the render window to
the maximum extent possible without distorting the image. In many cases
this will mean using letterboxing or limiting the maximum size of the
render window.
> I think the current behaviour is as good as any other.
I don't think you'd say that if you've spent any time working on scenes
which aren't designed to for the 1.333 aspect ratio. It is big pain in the
neck to use of an external image viewer just to get a non-distorted
fullscreen view of a preview image designed for 16:9 or 8:10.
Note that this problem effects everyone who wants to design scenes which
don't have roughly the same aspect ratio as their monitor. People with
16:9 LCDs will also run headlong into this problem if they want to work on
scenes designed for 1.333 monitors.
Given that 16:9 monitors are going to become more and more common in the
medium term, I think the aspect problem should be fixed now rather than in
the years it'll take for Pov 4 to see the light of day.
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Ken <tyl### [at] pacbellnet> wrote in news:3B998155.10FE702A@pacbell.net:
> Warp wrote:
>> QQ <now### [at] nowhereno> wrote:
>> : When the render window is maximized, the image is stretched to the
>> : limits of the display area without regard for the image aspect
>> : ratio.
>> Are you sure this should be considered a bug?
> It is not a bug rather it is a behaviour.
If it's working as designed then I assert that the design was buggy. :-)
> I don't ever recall it working differently.
IMO, just because it didn't work in 3.1 doesn't mean it isn't broken now
and shouldn't be fixed.
It's not as if a major rewrite is needed; an hour and a few dozen lines of
code will very likely resolve the problem completely.
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From: Thomas Lake
Subject: Re: render window doesn't preserve image aspect ratio
Date: 8 Sep 2001 02:07:25
Message: <3b99b59d$1@news.povray.org>
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I don't remember this working any different before.
> When the render window is maximized, the image is stretched to the limits
> of the display area without regard for the image aspect ratio. This bug
> most noticable (any most annoying) when creating portrait- or panorama-
> format images.
>
> This bug can be demonstrated by rendering scenes\qtvr\qtvrPanorama.pov and
> maximizing the render window.
>
>
>
> HW: Win2K running on a Celeron 400 CPU with 128MB ram.
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From: Warp
Subject: Re: bug: render window doesn't preserve image aspect ratio
Date: 8 Sep 2001 04:12:12
Message: <3b99d2dc@news.povray.org>
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I don't understand why do you want to maximize the window. It's not like
you are going to get more detail by that.
And besides, what if someone really wants to enlarge the image to
screen-size regardless of aspect ratio distortions?
--
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}// - Warp -
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From: Jan Walzer
Subject: Re: bug: render window doesn't preserve image aspect ratio
Date: 8 Sep 2001 05:00:53
Message: <3b99de45@news.povray.org>
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"Warp" <war### [at] tagpovrayorg> schrieb im Newsbeitrag
news:3b99d2dc@news.povray.org...
> I don't understand why do you want to maximize the window. It's not like
> you are going to get more detail by that.
>
> And besides, what if someone really wants to enlarge the image to
> screen-size regardless of aspect ratio distortions?
I often use it this way, and I got used to it since 3.1....
(For me) It's better this way...
When I render an oversized image (1800x2400 (this is portrait)) then I prefer
to see, how far the render is, by maximizing the window...
Who cares about distortion ? I just want to see the progress ....
--
Jan Walzer <jan### [at] lzernet>
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Warp wrote:
> I don't understand why do you want to maximize the window. It's not like
> you are going to get more detail by that.
As someone who mainly works with vertical formats, pseudo-panoramic formats
and large renders, I would surely appreciate a non-distorted maximized window.
G.
--
**********************
http://www.oyonale.com
**********************
Graphic experiments
Pov-ray gallery
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Warp <war### [at] tagpovrayorg> wrote in news:3b99d2dc@news.povray.org:
> I don't understand why do you want to maximize the window. It's not
> like you are going to get more detail by that.
Given that a 240x320 preview render is about 2.5" wide (about the size of
some postage stamps) on my monitor, maximizing the render window is
essential in order to see any detail whatsoever. I can provide a 1600x1200
screenshot if you need a graphical demonstration of just how small 240x320
is when compared to everything else on my desktop.
> And besides, what if someone really wants to enlarge the image to
> screen-size regardless of aspect ratio distortions?
While I've already seen one poster saying that he doesn't mind a distorted
enlargement, I don't think you'll find too many people who _want_ a
distorted enlargement. In any case, it wouldn't be particularly difficult
to allow the user to select the desired behavior (buggy vs correct) through
a configuration option in either an INI or the registry.
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