DXF.pm: fixed lwpolyline->line conversion for closed polylines.

1 files changed, 13 insertions, 3 deletions

diff --git a/DXF.pm b/DXF.pm
index 259db8a..23eef35 100644
--- a/DXF.pm
+++ b/DXF.pm
@@ -826,7 +826,7 @@ sub colorize_dxf {
 #  2*(b*m-a)*l + 2*(b*m-a)*x*(1-c) - 2*x*l - 2*x^2*(1-c) + l^2*m + 2*l*x*m = 0
 #  -2*(1-c)*x^2 + 2*((b*m-a)*(1-c) + l*(m-1))*x + (2*b*m+l*m-2*a)*l = 0
 
-# TODO: code 70: open and closed splines and polylines.
+# DONE: code 70: open and closed splines and polylines.
 # dest => source => sub{}
 my %replacers = (
   LWPOLYLINE => {
@@ -951,8 +951,18 @@ my %replacers = (
       my $node = shift;
       my @x = @{$node->{attrs}{x}};
       my @y = @{$node->{attrs}{y}};
-      die "invalid polyline"
-        unless @x == @y && @x >= 1;
+      my $flags = $node->{attrs}{int}//0;
+      my $closed = $flags & 1;
+      die "invalid lwpolyline"
+        unless @x == @y;
+      if (@x == 0) {
+        warn "empty lwpolyline";
+        return ();
+      }
+      if ($closed) {
+        push @x,$x[0];
+        push @y,$y[0];
+      }
       my @lines = map lol(LINE => {x => $x[$_], y => $y[$_],
                                   x1 => $x[$_+1], y1 => $y[$_+1] }), 0..$#x-1;
       return @lines;