--- /dev/null
+#! /usr/bin/perl
+
+$data_file="optmimierung_test.txt";
+open(DAT, $data_file) || die("Died");
+@raw_data=<DAT>;
+close(DAT);
+
+$tmp;
+
+foreach $line (@raw_data)
+{
+ ($n,$file,$angle)=split(/\t/,$line);
+
+ if ($n != 1) {
+ $new_angle=$tmp - $angle;
+ $new_angle %= 360;
+ $line =~ s/$angle/$new_angle\n/;
+ } else {
+ $new_angle = $angle;
+ }
+
+ $tmp = $new_angle;
+ $angle = $new_angle;
+ print $line;
+}