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| 1 | #!/usr/bin/perl |
| 2 | # |
| 3 | # dxf2gp - Convert simple DXF to Gnuplot |
| 4 | # |
| 5 | # Written 2011 by Werner Almesberger |
| 6 | # Copyright 2011 Werner Almesberger |
| 7 | # |
| 8 | # This program is free software; you can redistribute it and/or modify |
| 9 | # it under the terms of the GNU General Public License as published by |
| 10 | # the Free Software Foundation; either version 2 of the License, or |
| 11 | # (at your option) any later version. |
| 12 | # |
| 13 | |
| 14 | # |
| 15 | # Currently, only the directives LINE, CIRCLE, and ARC are supported. |
| 16 | # Adjacent line segments are not merged. Arcs and circles are translated |
| 17 | # to (multi-segment) lines. |
| 18 | # |
| 19 | # The main purpose of this script is currently to convert the M1 case |
| 20 | # design: |
| 21 | # http://projects.qi-hardware.com/index.php/p/m1/source/tree/master/cad/protocase_v7_laser.dxf |
| 22 | # |
| 23 | |
| 24 | $S_SCAN = 0; # wait for LINE, CIRCLE, or ARC |
| 25 | $S_ByLayer = 1; # next is ByLayer |
| 26 | $S_INDEX = 2; # next is index |
| 27 | $S_DATA = 3; # next is indexed data |
| 28 | $S_MARKER = 4; # next is subclass marker |
| 29 | |
| 30 | |
| 31 | sub line |
| 32 | { |
| 33 | print "$_[10] $_[20]\n$_[11] $_[21]\n\n"; |
| 34 | } |
| 35 | |
| 36 | sub circle |
| 37 | { |
| 38 | local ($x, $y, $r) = ($_[10], $_[20], $_[40]); |
| 39 | |
| 40 | for (my $i = 0; $i != 100; $i++) { |
| 41 | local $v = 3.14159265*2/100*$i; |
| 42 | print $x+$r*sin($v), " ", $y+$r*cos($v), "\n"; |
| 43 | } |
| 44 | print $x, " ", $y+$r, "\n\n"; |
| 45 | } |
| 46 | |
| 47 | sub arc |
| 48 | { |
| 49 | local ($x, $y, $r) = ($_[10], $_[20], $_[40]); |
| 50 | local ($a0, $a1) = ($_[50], $_[51]); |
| 51 | |
| 52 | $a1 += 360 if $a1 < $a0; |
| 53 | for (my $a = $a0; $a <= $a1; $a += 2) { |
| 54 | local $v = 3.14159265/180*$a; |
| 55 | print $x+$r*cos($v), " ", $y+$r*sin($v), "\n"; |
| 56 | } |
| 57 | print "\n"; |
| 58 | } |
| 59 | |
| 60 | |
| 61 | $s = $S_SCAN; |
| 62 | while (<>) { |
| 63 | if ($s == $S_SCAN) { |
| 64 | if (/^LINE\b/) { |
| 65 | *fn = *line; |
| 66 | } elsif (/^CIRCLE/) { |
| 67 | *fn = *circle; |
| 68 | } elsif (/^ARC/) { |
| 69 | *fn = *arc; |
| 70 | } else { |
| 71 | next; |
| 72 | } |
| 73 | $s = $S_ByLayer; |
| 74 | next; |
| 75 | } elsif ($s == $S_ByLayer) { |
| 76 | if (/^ByLayer/) { |
| 77 | $s = $S_INDEX; |
| 78 | } |
| 79 | next; |
| 80 | } elsif ($s == $S_INDEX) { |
| 81 | if ($_ == 0) { |
| 82 | &fn(@a); |
| 83 | @a = (); |
| 84 | $s = $S_SCAN; |
| 85 | } elsif ($_ == 100) { |
| 86 | $s = $S_MARKER; |
| 87 | } else { |
| 88 | $index = $_; |
| 89 | $s = $S_DATA; |
| 90 | } |
| 91 | } elsif ($s == $S_DATA) { |
| 92 | $a[$index] = $_+0; |
| 93 | $s = $S_INDEX; |
| 94 | } elsif ($s == $S_MARKER) { |
| 95 | $s = $S_INDEX; |
| 96 | } else { |
| 97 | die; |
| 98 | } |
| 99 | } |
| 100 |
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