POV-Ray : Newsgroups : povray.general : Map Mollweide projection (elliptical) onto sphere : Re: Map Mollweide projection (elliptical) onto sphere Server Time
29 Jul 2024 10:20:46 EDT (-0400)
  Re: Map Mollweide projection (elliptical) onto sphere  
From: Adrian
Date: 7 Nov 2011 10:10:00
Message: <web.4eb7f3e85ab24bf331dc6fa00@news.povray.org>
Christian Froeschlin <chr### [at] chrfrde> wrote:
> Adrian wrote:
>
> > pigment { image_map { png "text.png" map_type 1 } }
>
> I think Mercator is cylindrical so you could try map_type 2.

Unfortunately, that doesn't help, even after I adjust the scale and translate
the sphere such that it goes from y=0 to y=1, as required by map_type 2. The
distortions are still present.



Yes, I am not entirely sure that this is the case. My Mathematica implementation
of the conversion may be faulty (even though I followed mathworld [1]), is there
a standard way to deal with this? Some UNIX tool or even a built-in feature of
povray?


Adrian




[1] http://mathworld.wolfram.com/MercatorProjection.html
http://mathworld.wolfram.com/MollweideProjection.html


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