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From: pepke@loligo (Eric Pepke)
Newsgroups: comp.graphics
Subject: Re: How to map 24-bit RGB to best EGA/VGA palette?
Keywords: RGB EGA VGA color
Message-ID: <144@vsserv.scri.fsu.edu>
Date: 31 Aug 89 20:37:37 GMT
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In article <9464@venera.isi.edu> raveling@isi.edu (Paul Raveling) writes:
>	One thing this suggests is that using a polar-coordinate
>	representation of RGB space is likely to reduce quantization
>	error with typical algorithms.  Does anyone have an existing
>	**VERY FAST** algorithm for transforming between polar and
>	rectangular coordinates in 3-space?

I once did an approximation of R-P and P-R for a computer game on the 
Macintosh.  It's pretty straightforward and obvious, and it requires
nothing more onerous than an integer divide with precision double what 
the input and output precision is.  I'll see if I can dig it up.

Wanna collaborate on a a paper?  Respond to the INTERNET address below.

Eric Pepke                                     INTERNET: pepke@gw.scri.fsu.edu
Supercomputer Computations Research Institute  MFENET:   pepke@fsu
Florida State University                       SPAN:     scri::pepke
Tallahassee, FL 32306-4052                     BITNET:   pepke@fsu

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