RosettaCodeData/Task/Xiaolin-Wus-line-algorithm/Common-Lisp/xiaolin-wus-line-algorithm-...

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#!/bin/sh
sbcl --script xiaolin_wu_line_algorithm.lisp > alpha.pgm
pamgradient black black darkblue darkblue 800 800 > bluegradient.pam
pamgradient red red magenta magenta 800 800 > redgradient.pam
pamcomp -alpha=alpha.pgm redgradient.pam bluegradient.pam | pamtopng > image.png