POV-Ray : Newsgroups : povray.object-collection : The Bright Star Catalogue : Re: The Bright Star Catalogue Server Time
2 Oct 2023 07:16:58 EDT (-0400)
  Re: The Bright Star Catalogue  
From: Bald Eagle
Date: 25 Feb 2020 18:45:00
Message: <web.5e55b115e3b4c4164eec112d0@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:

> I just punted in despair, figuring each project might require a somewhat
> specialized solution, but I didn't notice the new thread activity until now.

Well, I think that something like the sunpos include file is mostly what I'm
looking for.

Given a longitude and latitude, a date, and an hour of the day, create a
celestial sphere.  Make it so that no matter what, each star is at least 1 pixel

I'm primarily interested in the geometry - the proper alignment.

"Look - that notch in that rock at Stonehenge really DOES line up with Rigel at
midnight on the winter solstice..."


Aside from that, you could add some sort of mechanism that allows the _USER_ to
tweak the catalogue.

So - whatever array you use to do the basic stuff, and then maybe a user array
that modifies the values or sets some flags before rendering.

That way someone could highlight a star with an object{} (torus, [under]line,
arrow, etc), put a text label, change the apparent size, replace the simple
sphere for the star with a fancy object{}, or apply a multiplier to the star's

I'd probably start with like 10 stars or a few constellations, and give it a
whirl, and then get some user feedback before doing anything bigger.

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