POV-Ray : Newsgroups : povray.text.tutorials : New tutorial about 2D screen coordinates : Re: New tutorial about 2D screen coordinates Server Time
29 Feb 2024 04:41:25 EST (-0500)
  Re: New tutorial about 2D screen coordinates  
From: Kenneth
Date: 1 Sep 2018 22:00:01
Message: <web.5b8b42f13848ca56a47873e10@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:
> For ages I have been using Norbert Kern's
> position_finder.pov macro from 2006

For anyone who's interested, here's the link to Norbert's original post (which
took me awhile to find)...


It's not very detailed, unfortunately.

Thomas, I've been playing around with his code, and I see where some
improvements can be made. One of the problems I've come across is that the code
itself seems to be built around a 'backward'-facing camera (i.e., the camera
position and look_at point resulting in a -z look_at direction.) With a regular
forward-facing camera, the code produces some odd results (and fixing things is
apparently not just a simple matter of tweaking only one thing.) But I'm
continuing to work at it...and to find some way to improve it's accuracy (which
I suspect is due to whatever particular camera angle is used-- it *seems* to be
more accurate with a 'zoom' angle rather than wide-angle.) It's quite a
'magical' piece of code otherwise.

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