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80 lines
1.4 KiB
Perl
Executable File
80 lines
1.4 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# zstack.pl - Convert 2.5D paths into a stack with limited Z steps
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#
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# Written 2012 by Werner Almesberger
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# Copyright 2012 Werner Almesberger
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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sub usage
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{
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print STDERR "usage: $0 [-r] z-start z-maxstep [file ...]\n";
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print STDERR " -r reverse Z stacking. Also swaps X and Y.\n";
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exit(1);
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}
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sub issue
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{
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local ($c, $z) = @_;
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my $t;
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#
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# The order here is a bit arbitrary. We sort to make the outcome
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# more predictable but it shouldn't really matter.
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#
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($t = $z{$c}) =~ s/\s+-?\d+(\.\d*)?$/ $z/mg;
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print $t;
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}
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if ($ARGV[0] eq "-r") {
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shift @ARGV;
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$reverse = 1;
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}
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&usage if $ARGV[0] =~ /^-[^0-9]/;
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$z0 = shift @ARGV;
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$zs = shift @ARGV;
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$z0 =~ s/mm$//;
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$zs =~ s/mm$//;
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&usage unless $zs > 0;
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while (<>) {
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if (/^\s*$/) {
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$z{$z} .= "$s\n";
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undef $s;
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}
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$z = $3 if /^-?\d+(\.\d*)?\s+-?\d+(\.\d*)?\s+(-?\d+(\.\d*)?)/;
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$s .= $_;
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$zmax = $z if $z > $zmax || !defined $zmax;
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}
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$z{$z} .= "$s\n";
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if ($reverse) {
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for (keys %z) {
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($t{$zmax-$_} = $z{$_}) =~
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s/^(-?\d+(\.\d*)?)\s+(-?\d+(\.\d*)?)\s+/$3 $1 /mg;
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}
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%z = %t;
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}
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$z = $z0;
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for $c (sort { $b <=> $a } keys %z) {
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while ($z > $c+$zs) {
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$z -= $zs;
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&issue($c, $z);
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}
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$z = $c;
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&issue($c, $z);
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}
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