POV-Ray : Newsgroups : povray.object-collection : 3D Loop : Re: 3D Loop Server Time
24 Oct 2021 02:35:56 EDT (-0400)
  Re: 3D Loop  
From: Le Forgeron
Date: 26 May 2015 11:53:57
Message: <55649715$1@news.povray.org>
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Le 26/05/2015 17:41, clipka a écrit :
> Am 25.05.2015 um 08:49 schrieb Le_Forgeron:
> 
>> Le 24/05/2015 22:08, Lars Rohwedder a écrit :
> [...]
>>> That was _not_ my question. I asked when 16:9 will become the 
>>> _default_ in Povray so such scaling of the right vector
>>> becomes unnecessary. oO
>>> 
>>> Lars R.
>>> 
>> Unnecessary for you... my screen are 1920x1200, I would need
>> 16:10.
>> 
>> Changing the default right vector (even to something like 
>> image_width:image_height ratio, assuming square pixel
>> everywhere) would only have one sure effect: break every
>> historical scenes. Without providing 100% satisfaction to all
>> users. Better not move.
> 
> I totally agree - except when it comes to defaulting to square
> pixels, which /does/ make sense nowadays; after all, that's what
> any reasonable image handling software defaults to as well if the
> input image material provides no embedded resolution information.
> 

Yep... until you want to make a DVD (none of NTSC and PAL have square
pixels...)

> 
>> And guess what: 4K screens are coming... and there is at least 5 
>> different resolution under the name 4K, none with exactly the
>> same ratio ..
>> 
>> So far:
>> 
>> * 4096 x 2160 ( 256:135) [DCI native] * 3840 x 2160 ( 16:9 )
>> [UHD-1] * 5120 x 2160 ( 21:9 ) [UWT] * 5120 x 3200 ( 16:10 )
>> [WHXGA] * 4096 x 1716 ( 2.39: 1 ) [DCI cinemascope cropped] *
>> 3996 x 2160 ( 1.85: 1 ) [DCI flat cropped]
> 
> (Um... that looks more like 8K to me... or am I missing
> something?)

4K is about the width.
To be compared to camera sensor which are sold by millions of pixels
(2 millions... 10 millions... 40 millions... none advertising
aspect-ratio): marketing is all about getting people confused...
especially after selling TV screen as 720i, 720p, 1080p... where it
was the height, not the width... a delight of confusion.

8K varies from 7680 to 10080 pixels for width.

> 
> It might be worth noting that of all those aspect ratios, 16:10 is 
> closest to the famous Golden Ratio (1.618...:1), which has been 
> considered an aesthetically superior ratio for literally thousands
> of years.
> 

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