POV-Ray : Newsgroups : povray.binaries.images : First image posting : Re: First image posting Server Time
14 May 2021 03:51:25 EDT (-0400)
  Re: First image posting  
From: Bald Eagle
Date: 2 May 2021 08:15:00
Message: <web.608e9704f7d27fe1f9dae3025979125@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> > Presumably, this is what all this "mip-mapping" business is about.   Has anyone
> > ever tried to emulate that process, that we know of?
> >
> Good question. It would be interesting to try indeed. RoundTuits are
> needed however!

https://www.youtube.com/watch?v=0flY11lVCwY
He covers this briefly in the first 2 minutes.

Just shooting from the hip here, but it sounds like a functional emulation of
this would be to start with a very large, high-def version of the texture and
then make a few smaller versions.   Then just have an array of the filenames and
the texture could probably be automagically sampled at the desired resolution
using a polynomial function like I did in the vortex scene or using a spline
like Ingo is doing.

Maybe there's some kind of MOA (minutes of angle) calculation that initially
gets done to optimally set the different image_map resolutions...?


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