From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 25 Jul 2013 20:00:19 +0000 (+0200)
Subject: Add a Perl script to convert the output of find-pairwise-distance to a PGM file for... 
X-Git-Url: https://git.sesse.net/?p=gifmaker;a=commitdiff_plain;h=HEAD

Add a Perl script to convert the output of find-pairwise-distance to a PGM file for visualization.
---

diff --git a/pairwise-to-pgm.pl b/pairwise-to-pgm.pl
new file mode 100644
index 0000000..3e11fc8
--- /dev/null
+++ b/pairwise-to-pgm.pl
@@ -0,0 +1,17 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+use POSIX;
+
+my $width = 599;
+my $height = 599;
+my $max = 7263081;
+
+print "P5\n$width $height\n255\n";
+while (<>) {
+	/(\d+) (\d+) (\d+)/ or die;
+	my ($i, $j, $z) = ($1, $2, $3);
+	$z = log($z + 1.0) / log($max + 1.0);
+	$z = pow($z, 20);
+	print chr(int(255.0 * $z));
+}