From d3a98cf6cbc3bd0b9efc570f58e8812c03931c18 Mon Sep 17 00:00:00 2001 From: Simon Rettberg Date: Tue, 16 Oct 2018 10:08:48 +0200 Subject: Original 5.40 --- hacks/glx/dxf2gl.pl | 729 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 729 insertions(+) create mode 100755 hacks/glx/dxf2gl.pl (limited to 'hacks/glx/dxf2gl.pl') diff --git a/hacks/glx/dxf2gl.pl b/hacks/glx/dxf2gl.pl new file mode 100755 index 0000000..9ed470c --- /dev/null +++ b/hacks/glx/dxf2gl.pl @@ -0,0 +1,729 @@ +#!/usr/bin/perl -w +# Copyright © 2003-2014 Jamie Zawinski +# +# Permission to use, copy, modify, distribute, and sell this software and its +# documentation for any purpose is hereby granted without fee, provided that +# the above copyright notice appear in all copies and that both that +# copyright notice and this permission notice appear in supporting +# documentation. No representations are made about the suitability of this +# software for any purpose. It is provided "as is" without express or +# implied warranty. +# +# Reads a DXF file, and emits C data suitable for use with OpenGL's +# glInterleavedArrays() and glDrawArrays() routines. +# +# Options: +# +# --normalize Compute the bounding box of the object, and scale all +# coordinates so that the object fits inside a unit cube. +# +# --smooth When computing normals for the vertexes, average the +# normals at any edge which is less than 90 degrees. +# If this option is not specified, planar normals will be +# used, resulting in a "faceted" object. +# +# --wireframe Emit lines instead of faces. +# +# --layers Emit a separate set of polygons for each layer in the +# input file, instead of emitting the whole file as a +# single unit. +# +# Created: 8-Mar-2003. + +require 5; +use diagnostics; +use strict; + +use POSIX qw(mktime strftime); +use Math::Trig qw(acos); +use Text::Wrap; + +my $progname = $0; $progname =~ s@.*/@@g; +my ($version) = ('$Revision: 1.11 $' =~ m/\s(\d[.\d]+)\s/s); + +my $verbose = 0; + + +# convert a vector to a unit vector +sub normalize($$$) { + my ($x, $y, $z) = @_; + my $L = sqrt (($x * $x) + ($y * $y) + ($z * $z)); + if ($L != 0) { + $x /= $L; + $y /= $L; + $z /= $L; + } else { + $x = $y = $z = 0; + } + return ($x, $y, $z); +} + + +# Calculate the unit normal at p0 given two other points p1,p2 on the +# surface. The normal points in the direction of p1 crossproduct p2. +# +sub face_normal($$$$$$$$$) { + my ($p0x, $p0y, $p0z, + $p1x, $p1y, $p1z, + $p2x, $p2y, $p2z) = @_; + + my ($nx, $ny, $nz); + my ($pax, $pay, $paz); + my ($pbx, $pby, $pbz); + + $pax = $p1x - $p0x; + $pay = $p1y - $p0y; + $paz = $p1z - $p0z; + $pbx = $p2x - $p0x; + $pby = $p2y - $p0y; + $pbz = $p2z - $p0z; + $nx = $pay * $pbz - $paz * $pby; + $ny = $paz * $pbx - $pax * $pbz; + $nz = $pax * $pby - $pay * $pbx; + + return (normalize ($nx, $ny, $nz)); +} + + +my $pi = 3.141592653589793; +my $radians_to_degrees = 180.0 / $pi; + +# Calculate the angle (in degrees) between two vectors. +# +sub vector_angle($$$$$$) { + my ($x1, $y1, $z1, + $x2, $y2, $z2) = @_; + + my $L1 = sqrt ($x1*$x1 + $y1*$y1 + $z1*$z1); + my $L2 = sqrt ($x2*$x2 + $y2*$y2 + $z2*$z2); + + return 0 if ($L1 == 0 || $L2 == 0); + return 0 if ($x1 == $x2 && $y1 == $y2 && $z1 == $z2); + + # dot product of two vectors is defined as: + # $L1 * $L1 * cos(angle between vectors) + # and is also defined as: + # $x1*$x2 + $y1*$y2 + $z1*$z2 + # so: + # $L1 * $L1 * cos($angle) = $x1*$x2 + $y1*$y2 + $z1*$z2 + # cos($angle) = ($x1*$x2 + $y1*$y2 + $z1*$z2) / ($L1 * $L2) + # $angle = acos (($x1*$x2 + $y1*$y2 + $z1*$z2) / ($L1 * $L2)); + # + my $cos = ($x1*$x2 + $y1*$y2 + $z1*$z2) / ($L1 * $L2); + $cos = 1 if ($cos > 1); # avoid fp rounding error (1.000001 => sqrt error) + my $angle = acos ($cos); + + return ($angle * $radians_to_degrees); +} + + +# given a list of triangles ( [ X1, Y1, Z1, X2, Y2, Z2, X3, Y3, Z3, ]+ ) +# returns a list of the normals for each vertex. These are the smoothed +# normals: the average of the normals of the participating faces. +# +sub compute_vertex_normals(@) { + my (@points) = @_; + my $npoints = ($#points+1) / 3; + my $nfaces = $npoints / 3; + + my @face_normals = (); + my %point_faces; + + for (my $i = 0; $i < $nfaces; $i++) { + my ($ax, $ay, $az, $bx, $by, $bz, $cx, $cy, $cz) = + @points[($i*9) .. ($i*9)+8]; + + # store the normal for each face in the $face_normals array + # indexed by face number. + # + my @norm = face_normal ($ax, $ay, $az, + $bx, $by, $bz, + $cx, $cy, $cz); + $face_normals[$i] = \@norm; + + # store in the %point_faces hash table a list of every face number + # in which a point participates + + foreach my $p ("$ax $ay $az", "$bx $by $bz", "$cx $cy $cz") { + my @flist = (defined($point_faces{$p}) ? @{$point_faces{$p}} : ()); + push @flist, $i; + $point_faces{$p} = \@flist; + } + } + + + # compute the normal for each vertex of each face. + # (these points are not unique -- because there might be multiple + # normals associated with the same vertex for different faces, + # in the case where it's a sharp angle.) + # + my @normals = (); + for (my $i = 0; $i < $nfaces; $i++) { + my @verts = @points[($i*9) .. ($i*9)+8]; + error ("overshot in points?") unless defined($verts[8]); + + my @norm = @{$face_normals[$i]}; + error ("no normal $i?") unless defined($norm[2]); + + # iterate over the (three) vertexes in this face. + # + for (my $j = 0; $j < 3; $j++) { + my ($x, $y, $z) = @verts[($j*3) .. ($j*3)+2]; + error ("overshot in verts?") unless defined($z); + + # Iterate over the faces in which this point participates. + # But ignore any other faces that are at more than an N degree + # angle from this point's face. Those are sharp edges. + # + my ($nx, $ny, $nz) = (0, 0, 0); + my @faces = @{$point_faces{"$x $y $z"}}; + foreach my $fn (@faces) { + my ($ax, $ay, $az, $bx, $by, $bz, $cx, $cy, $cz) = + @points[($fn*9) .. ($fn*9)+8]; + my @fnorm = @{$face_normals[$fn]}; + + # ignore any adjascent faces that are more than N degrees off. + my $angle = vector_angle ($norm[0], $norm[1], $norm[2], + $fnorm[0], $fnorm[1], $fnorm[2]); + next if ($angle >= 30); + + $nx += $fnorm[0]; + $ny += $fnorm[1]; + $nz += $fnorm[2]; + } + + push @normals, normalize ($nx, $ny, $nz); + } + } + + return @normals; +} + + +sub parse_dxf($$$$$) { + my ($filename, $dxf, $normalize_p, $wireframe_p, $layers_p) = @_; + + $dxf =~ s/\r\n/\n/gs; # CRLF + $dxf =~ s/^[ \t\n]+|[ \t\n]+$//s; # leading/trailing whitespace + + # Convert whitespace within a line to _, e.g., "ObjectDBX Classes". + # What the hell is up with this file format! + 1 while ($dxf =~ s/([^ \t\n])[ \t]+([^ \t\n])/$1_$2/gs); + + $dxf =~ s/\r/\n/gs; + + # Turn blank lines into "", e.g., "$DIMBLK \n 1 \n \n 9 \n" + $dxf =~ s/\n\n/\n""\n/gs; + + my @tokens = split (/[ \t\n]+/, $dxf); # tokenize + + my @entities = (); # parse + while (@tokens) { + my @elts = (); + my $key = shift @tokens; # sectionize at "0 WORD" + do { + my $val = shift @tokens; + push @elts, [ $key, $val ]; # contents are [CODE VAL] + $key = shift @tokens; + } while ($key && $key ne 0); + unshift @tokens, $key if defined($key); + push @entities, \@elts; + } + my %triangles; # list of points, indexed by layer name + my %lines; + my $error_count = 0; + + foreach my $entity (@entities) { + my $header = shift @$entity; + my ($code, $name) = @$header; + + if ($name eq 'SECTION' || + $name eq 'HEADER' || + $name eq 'ENDSEC' || + $name eq 'EOF') { + print STDERR "$progname: $filename: ignoring \"$code $name\"\n" + if ($verbose > 1); + + } elsif ($name eq '3DFACE') { + + my @points = (); + my $pc = 0; + my $layer = ''; + + foreach my $entry (@$entity) { + my ($key, $val) = @$entry; + if ($key eq 8) { $layer = $val; # layer name + + } elsif ($key eq 10) { $pc++; $points[0] = $val; # X1 + } elsif ($key eq 20) { $pc++; $points[1] = $val; # Y1 + } elsif ($key eq 30) { $pc++; $points[2] = $val; # Z1 + + } elsif ($key eq 11) { $pc++; $points[3] = $val; # X2 + } elsif ($key eq 21) { $pc++; $points[4] = $val; # Y2 + } elsif ($key eq 31) { $pc++; $points[5] = $val; # Z2 + + } elsif ($key eq 12) { $pc++; $points[6] = $val; # X3 + } elsif ($key eq 22) { $pc++; $points[7] = $val; # Y3 + } elsif ($key eq 32) { $pc++; $points[8] = $val; # Z3 + + } elsif ($key eq 13) { $pc++; $points[9] = $val; # X4 + } elsif ($key eq 23) { $pc++; $points[10] = $val; # Y4 + } elsif ($key eq 33) { $pc++; $points[11] = $val; # Z4 + + } elsif ($key eq 62) { # color number + } elsif ($key eq 70) { # invisible edge flag + } else { + print STDERR "$progname: $filename: WARNING:" . + " unknown $name: \"$key $val\"\n"; + $error_count++; + } + } + + error ("got $pc points in $name") unless ($pc == 12); + + if ($points[6] != $points[9] || + $points[7] != $points[10] || + $points[8] != $points[11]) { + error ("$filename: got a quad, not a triangle\n"); + } else { + @points = @points[0 .. 8]; + } + + foreach (@points) { $_ += 0; } # convert strings to numbers + + $layer = '' unless $layers_p; + + $triangles{$layer} = [] unless defined ($triangles{$layer}); + push @{$triangles{$layer}}, @points; + + } elsif ($name eq 'LINE') { + + my @points = (); + my $pc = 0; + my $layer = ''; + + foreach my $entry (@$entity) { + my ($key, $val) = @$entry; + if ($key eq 8) { $layer = $val; # layer name + + } elsif ($key eq 10) { $pc++; $points[0] = $val; # X1 + } elsif ($key eq 20) { $pc++; $points[1] = $val; # Y1 + } elsif ($key eq 30) { $pc++; $points[2] = $val; # Z1 + + } elsif ($key eq 11) { $pc++; $points[3] = $val; # X2 + } elsif ($key eq 21) { $pc++; $points[4] = $val; # Y2 + } elsif ($key eq 31) { $pc++; $points[5] = $val; # Z2 + + } elsif ($key eq 39) { # thickness + } elsif ($key eq 62) { # color number + } else { + print STDERR "$progname: $filename: WARNING:" . + " unknown $name: \"$key $val\"\n"; + $error_count++; + } + } + + error ("got $pc points in $name") unless ($pc == 6); + + foreach (@points) { $_ += 0; } # convert strings to numbers + + $layer = '' unless $layers_p; + + $lines{$layer} = [] unless defined ($lines{$layer}); + push @{$lines{$layer}}, @points; + + } elsif ($name =~ m/^\d+$/s) { + error ("sequence lost: \"$code $name\""); + + } else { + print STDERR "$progname: $filename: WARNING: unknown: \"$code $name\"\n"; + $error_count++; + } + + error ("too many errors: bailing!") if ($error_count > 50); + } + + if ($wireframe_p) { + + # Convert faces to lines. + # Don't duplicate shared edges. + + foreach my $layer (keys %triangles) { + my %dups; + my @triangles = @{$triangles{$layer}}; + while (@triangles) { + my $x1 = shift @triangles; # 0 + my $y1 = shift @triangles; # 1 + my $z1 = shift @triangles; # 2 + my $x2 = shift @triangles; # 3 + my $y2 = shift @triangles; # 4 + my $z2 = shift @triangles; # 5 + my $x3 = shift @triangles; # 6 + my $y3 = shift @triangles; # 7 + my $z3 = shift @triangles; # 8 + + my $p = sub(@) { + my ($x1, $y1, $z1, $x2, $y2, $z2) = @_; + my $key1 = "$x1, $y1, $z1, $x2, $y2, $z2"; + my $key2 = "$x2, $y2, $z2, $x1, $y1, $z1"; + my $dup = $dups{$key1} || $dups{$key2}; + $dups{$key1} = 1; + $dups{$key2} = 1; + push @{$lines{$layer}}, @_ unless $dup; + } + ; + $p->($x1, $y1, $z1, $x2, $y2, $z2); + $p->($x2, $y2, $z2, $x3, $y3, $z3); + $p->($x3, $y3, $z3, $x1, $y1, $z1); + } + + @{$triangles{$layer}} = (); + } + + } else { + foreach my $layer (keys %lines) { + my $n = @{$lines{$layer}}; + @{$lines{$layer}} = (); + print STDERR "$progname: $filename: $layer: WARNING:" . + " ignored $n stray LINE" . ($n == 1 ? "" : "s") . ".\n" + if ($n); + } + } + + + # find bounding box, and normalize + # + if ($normalize_p || $verbose) { + my $minx = 999999999; + my $miny = 999999999; + my $minz = 999999999; + my $maxx = -999999999; + my $maxy = -999999999; + my $maxz = -999999999; + my $i = 0; + + foreach my $layer (keys %triangles) { + my %dups; + my @triangles = @{$triangles{$layer}}; + + foreach my $n (@{$lines{$layer}}, @{$triangles{$layer}}) { + if ($i == 0) { $minx = $n if ($n < $minx); + $maxx = $n if ($n > $maxx); } + elsif ($i == 1) { $miny = $n if ($n < $miny); + $maxy = $n if ($n > $maxy); } + else { $minz = $n if ($n < $minz); + $maxz = $n if ($n > $maxz); } + $i = 0 if (++$i == 3); + } + } + + my $w = ($maxx - $minx); + my $h = ($maxy - $miny); + my $d = ($maxz - $minz); + my $sizea = ($w > $h ? $w : $h); + my $sizeb = ($w > $d ? $w : $d); + my $size = ($sizea > $sizeb ? $sizea : $sizeb); + + print STDERR "$progname: $filename: bbox is " . + sprintf("%.2f x %.2f x %.2f\n", $w, $h, $d) + if ($verbose); + print STDERR "$progname: $filename: center is " . + sprintf("%.2f, %.2f, %.2f\n", + $minx + $w / 2, + $miny + $h / 2, + $minz + $d / 2) + if ($verbose); + + if ($normalize_p) { + $w /= $size; + $h /= $size; + $d /= $size; + + print STDERR "$progname: $filename: dividing by " . + sprintf("%.2f", $size) . " for bbox of " . + sprintf("%.2f x %.2f x %.2f\n", $w, $h, $d) + if ($verbose); + foreach my $layer (keys %triangles) { + foreach my $n (@{$triangles{$layer}}) { $n /= $size; } + foreach my $n (@{$lines{$layer}}) { $n /= $size; } + } + } + } + + return ($wireframe_p ? \%lines : \%triangles); +} + + +sub generate_c_1($$$$$@) { + my ($name, $outfile, $smooth_p, $wireframe_p, $normalize_p, @points) = @_; + + my $ccw_p = 1; # counter-clockwise winding rule for computing normals + + my $npoints = ($#points + 1) / 3; + my $nfaces = ($wireframe_p ? $npoints/2 : $npoints/3); + + my @normals; + if ($smooth_p && !$wireframe_p) { + @normals = compute_vertex_normals (@points); + + if ($#normals != $#points) { + error ("computed " . (($#normals+1)/3) . " normals for " . + (($#points+1)/3) . " points?"); + } + } + + my $code .= "\nstatic const float ${name}_data[] = {\n"; + + if ($wireframe_p) { + my %dups; + for (my $i = 0; $i < $nfaces; $i++) { + my $ax = $points[$i*6]; + my $ay = $points[$i*6+1]; + my $az = $points[$i*6+2]; + + my $bx = $points[$i*6+3]; + my $by = $points[$i*6+4]; + my $bz = $points[$i*6+5]; + + my $lines = sprintf("\t" . "%.6f,%.6f,%.6f,\n" . + "\t" . "%.6f,%.6f,%.6f,\n", + $ax, $ay, $az, + $bx, $by, $bz); + $lines =~ s/([.\d])0+,/$1,/g; # lose trailing insignificant zeroes + $lines =~ s/\.,/,/g; + $lines =~ s/-0,/0,/g; + + $code .= $lines; + } + + } else { + for (my $i = 0; $i < $nfaces; $i++) { + my $ax = $points[$i*9]; + my $ay = $points[$i*9+1]; + my $az = $points[$i*9+2]; + + my $bx = $points[$i*9+3]; + my $by = $points[$i*9+4]; + my $bz = $points[$i*9+5]; + + my $cx = $points[$i*9+6]; + my $cy = $points[$i*9+7]; + my $cz = $points[$i*9+8]; + + my ($nax, $nay, $naz, + $nbx, $nby, $nbz, + $ncx, $ncy, $ncz); + + if ($smooth_p) { + $nax = $normals[$i*9]; + $nay = $normals[$i*9+1]; + $naz = $normals[$i*9+2]; + + $nbx = $normals[$i*9+3]; + $nby = $normals[$i*9+4]; + $nbz = $normals[$i*9+5]; + + $ncx = $normals[$i*9+6]; + $ncy = $normals[$i*9+7]; + $ncz = $normals[$i*9+8]; + + } else { + if ($ccw_p) { + ($nax, $nay, $naz) = face_normal ($ax, $ay, $az, + $bx, $by, $bz, + $cx, $cy, $cz); + } else { + ($nax, $nay, $naz) = face_normal ($ax, $ay, $az, + $cx, $cy, $cz, + $bx, $by, $bz); + } + ($nbx, $nby, $nbz) = ($nax, $nay, $naz); + ($ncx, $ncy, $ncz) = ($nax, $nay, $naz); + } + + my $lines = sprintf("\t" . "%.6f,%.6f,%.6f," . "%.6f,%.6f,%.6f,\n" . + "\t" . "%.6f,%.6f,%.6f," . "%.6f,%.6f,%.6f,\n" . + "\t" . "%.6f,%.6f,%.6f," . "%.6f,%.6f,%.6f,\n", + $nax, $nay, $naz, $ax, $ay, $az, + $nbx, $nby, $nbz, $bx, $by, $bz, + $ncx, $ncy, $ncz, $cx, $cy, $cz); + $lines =~ s/([.\d])0+,/$1,/g; # lose trailing insignificant zeroes + $lines =~ s/\.,/,/g; + $lines =~ s/-0,/0,/g; + + $code .= $lines; + } + } + + my $format = ($wireframe_p ? 'GL_V3F' : 'GL_N3F_V3F'); + my $primitive = ($wireframe_p ? 'GL_LINES' : 'GL_TRIANGLES'); + + $code =~ s/,\n$//s; + $code .= "\n};\n"; + $code .= "static const struct gllist ${name}_frame = {\n"; + $code .= " $format, $primitive, $npoints, ${name}_data, 0\n};\n"; + $code .= "const struct gllist *$name = &${name}_frame;\n"; + + print STDERR "$progname: $outfile: $name: $npoints points, $nfaces faces.\n" + if ($verbose); + + return ($code, $npoints, $nfaces); +} + + +sub generate_c($$$$$$) { + my ($infile, $outfile, $smooth_p, $wireframe_p, $normalize_p, $layers) = @_; + + my $code = ''; + + my $token = $outfile; # guess at a C token from the filename + $token =~ s/\<[^<>]*\>//; + $token =~ s@^.*/@@; + $token =~ s/\.[^.]*$//; + $token =~ s/[^a-z\d]/_/gi; + $token =~ s/__+/_/g; + $token =~ s/^_//g; + $token =~ s/_$//g; + $token =~ tr [A-Z] [a-z]; + $token = 'foo' if ($token eq ''); + + my @layers = sort (keys %$layers); + + $infile =~ s@^.*/@@s; + $code .= ("/* Generated from \"$infile\" on " . + strftime ("%d-%b-%Y", localtime ()) . ".\n" . + " " . ($wireframe_p + ? "Wireframe." + : ($smooth_p ? + "Smoothed vertex normals." : + "Faceted face normals.")) . + ($normalize_p ? " Normalized to unit bounding box." : "") . + "\n" . + (@layers > 1 + ? wrap (" ", " ", "Components: " . join (", ", @layers)) . ".\n" + : "") . + " */\n\n"); + + $code .= "#include \"gllist.h\"\n"; + + my $npoints = 0; + my $nfaces = 0; + + foreach my $layer (@layers) { + my $name = $layer ? "${token}_${layer}" : $token; + my ($c, $np, $nf) = + generate_c_1 ($name, $outfile, + $smooth_p, $wireframe_p, $normalize_p, + @{$layers->{$layer}}); + $code .= $c; + $npoints += $np; + $nfaces += $nf; + } + + print STDERR "$progname: $outfile: total: $npoints points, $nfaces faces.\n" + if ($verbose && @layers > 1); + + return $code; +} + + +# Returns true if the two files differ (by running "cmp") +# +sub cmp_files($$) { + my ($file1, $file2) = @_; + + my @cmd = ("cmp", "-s", "$file1", "$file2"); + print STDERR "$progname: executing \"" . join(" ", @cmd) . "\"\n" + if ($verbose > 3); + + system (@cmd); + my $exit_value = $? >> 8; + my $signal_num = $? & 127; + my $dumped_core = $? & 128; + + error ("$cmd[0]: core dumped!") if ($dumped_core); + error ("$cmd[0]: signal $signal_num!") if ($signal_num); + return $exit_value; +} + + +sub dxf_to_gl($$$$$$) { + my ($infile, $outfile, $smooth_p, $normalize_p, $wireframe_p, $layers_p) = @_; + + open (my $in, "<$infile") || error ("$infile: $!"); + my $filename = ($infile eq '-' ? "" : $infile); + print STDERR "$progname: reading $filename...\n" + if ($verbose); + + local $/ = undef; # read entire file + my $dxf = <$in>; + close $in; + + my $data = parse_dxf ($filename, $dxf, $normalize_p, $wireframe_p, $layers_p); + + $filename = ($outfile eq '-' ? "" : $outfile); + my $code = generate_c ($infile, $filename, $smooth_p, $wireframe_p, + $normalize_p, $data); + + if ($outfile eq '-') { + print STDOUT $code; + } else { + my $tmp = "$outfile.tmp"; + open (my $out, '>', $tmp) || error ("$tmp: $!"); + print $out $code || error ("$filename: $!"); + close $out || error ("$filename: $!"); + if (cmp_files ($filename, $tmp)) { + if (!rename ($tmp, $filename)) { + unlink $tmp; + error ("mv $tmp $filename: $!"); + } + print STDERR "$progname: wrote $filename\n"; + } else { + unlink "$tmp" || error ("rm $tmp: $!\n"); + print STDERR "$progname: $filename unchanged\n" if ($verbose); + } + } +} + + +sub error() { + ($_) = @_; + print STDERR "$progname: $_\n"; + exit 1; +} + +sub usage() { + print STDERR "usage: $progname " . + "[--verbose] [--normalize] [--smooth] [--wireframe] [--layers]\n" . + "[infile [outfile]]\n"; + exit 1; +} + +sub main() { + my ($infile, $outfile); + my $normalize_p = 0; + my $smooth_p = 0; + my $wireframe_p = 0; + my $layers_p = 0; + while ($_ = $ARGV[0]) { + shift @ARGV; + if ($_ eq "--verbose") { $verbose++; } + elsif (m/^-v+$/) { $verbose += length($_)-1; } + elsif ($_ eq "--normalize") { $normalize_p = 1; } + elsif ($_ eq "--smooth") { $smooth_p = 1; } + elsif ($_ eq "--wireframe") { $wireframe_p = 1; } + elsif ($_ eq "--layers") { $layers_p = 1; } + elsif (m/^-./) { usage; } + elsif (!defined($infile)) { $infile = $_; } + elsif (!defined($outfile)) { $outfile = $_; } + else { usage; } + } + + $infile = "-" unless defined ($infile); + $outfile = "-" unless defined ($outfile); + + dxf_to_gl ($infile, $outfile, $smooth_p, $normalize_p, $wireframe_p, $layers_p); +} + +main; +exit 0; -- cgit v1.2.3-55-g7522