[ptx] Projections (was Alternative fisheye projections)

[brette at cinci.rr.com]

Peter,

If you want fast, you probably don't want Perl.  Scrippting languages
are great for getting something up and running quickly, but they aren't
known for being quick to execute!  If you want speed, you need a
language like C.

If you need this widget to look like a Perl script for some reason, I'm
pretty sure you can call C/C++ stuff from Perl.

Some quick Googling (my favorite past time) revealed this:
http://www.unix.org.ua/orelly/perl/prog3/ch21_03.htm
which then lead to this:
http://www.swig.org/

Have fun!
Brett

----- Original Message -----
From: Peter Gawthrop <peter at gawthrop.net>
Date: Thursday, April 6, 2006 12:33 pm
Subject: [ptx] Projections (was Alternative fisheye projections)
To: unlisted-recipients: ; (no To-header on input)

> I'd like to play around with other projections.  The idea is to
> stitch a rectilinear 2x1 and then project it to make it look good.
> 
> So far, I have modified sphere-slicer.pl by Bruno Postle to do this
> for Mercator's projection (using formulae from
> http://mathworld.wolfram.com/topics/MapProjections.html). The problem
> is that it is slow. Before I plunge in to other projections, I would
> like to be sure I am on the right path.
> 
> Do you thing perl is the correct approach? Or would modifying 
> nona/hugin be
> a better approach? I guess the main issues for me are speed and
> interpolation quality.
> 
> Any ideas welcome,
> 
>    Peter.
> ptx at email-lists.org