# pst-spectrum: 

To represent the spectrum of light decomposition, we have several 
packages at our disposal with PSTricks: pst-spectra} 
by Arnaud Schmittbuhl, xcolor by Uwe Kern, and a pstricks-add command.
All of them use the same source: code by Dan Bruton transposed into PostScript 
or TeX. This package provides an extended visible spectrum. 
However, it is possible to obtain the representation of the spectrum 
directly from the data of the »International Commission on Illumination«
(CIE), 
and we have the choice between the data of (CIE 1931) and that of 
(CIE 1964}). Then we must choose a color space, sRGB, 
Adobe,etc. 

PSTricks is PostScript Tricks, the documentation cannot be run
with pdftex, use the sequence latex->dvips->ps2pdf or lualatex,
which is a bit slow for animations but the easiest way.

This program can be redistributed and/or modified under the terms
of the LaTeX Project Public License Distributed from CTAN archives
in directory macros/latex/base/lppl.txt.

hvoss@tug.org