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## Copyright (C) 1999 Paul Kienzle
##
## This program is free software and may be used for any purpose. This
## copyright notice must be maintained. Paul Kienzle is not responsible
## for the consequences of using this software.
## Colormap
##
## map = prism (number)
## Author: Paul Kienzle <pkienzle@cs.indiana.edu>
## Created: Sept 99
## Modified: jc
function map = prism (number)
if (nargin == 0)
number = 64;
elseif (nargin > 1)
usage ("prism (number)");
endif
x = rem([0:(number-1)]',6)/6;
r = clip(6*abs(x-1/2)-1);
g = clip(2 - 6*abs(x-1/3));
b = clip(2 - 6*abs(x-2/3));
map = [r, g, b];
endfunction
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