POV-Ray : Newsgroups : povray.object-collection : The Bright Star Catalogue : Re: The Bright Star Catalogue Server Time
3 Dec 2021 11:40:07 EST (-0500)
  Re: The Bright Star Catalogue  
From: Le Forgeron
Date: 10 Feb 2018 13:41:25
Message: <5a7f3cd5$1@news.povray.org>
Le 10/02/2018 à 04:23, Bald Eagle a écrit :
> Mike Horvath <mik### [at] gmailcom> wrote:
> But I don't think in POVray there's an easy way to make a star
>> exactly 1 pixel big. Maybe with some trigonometry?
> 
> I worked that out obtain a constant-apparent-width cylinder for a bounding box,
> and a Dupin cyclide for orbital trajectories.
> Obtaining a constant 1-pixel width is pretty trivial with the orthographic
> camera, since with the default camera, IIRC, 1 POV-unit = 1 pixel.

not really.
Unless your default camera is
...
  up image_height*y
  right image_width*x
...
but that's not the camera you get from

camera{ orthographic }

|| up: 0.000, 1.000, 0.000
|| right: 1.330, 0.000, 0.000
|| location: 0.000, 0.000, 0.000
|| direction: 0.000, 0.000, 1.000


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