From d056535bd8c23f0b82a2b7ebb9d9b3fa91989876 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sun, 4 Dec 2011 17:09:06 +0100
Subject: [PATCH] Further corrections to the bridge angle detection algorithm.
 #58

---
 lib/Slic3r/Layer.pm | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/Slic3r/Layer.pm b/lib/Slic3r/Layer.pm
index 9f55487b8..10e0a2ce4 100644
--- a/lib/Slic3r/Layer.pm
+++ b/lib/Slic3r/Layer.pm
@@ -285,7 +285,15 @@ sub process_bridges {
                 );
             }
             
-            if (@edges) {
+            if (@edges == 2) {
+                my @chords = map Slic3r::Line->new($_->points->[0], $_->points->[-1]), @edges;
+                my @midpoints = map $_->midpoint, @chords;
+                my $line_between_midpoints = Slic3r::Line->new(@midpoints);
+                $bridge_angle = rad2deg_dir($line_between_midpoints->direction);
+            } elsif (@edges == 1) {
+                my $line = Slic3r::Line->new($edges[0]->points->[0], $edges[0]->points->[-1]);
+                $bridge_angle = rad2deg_dir($line->direction);
+            } else {
                 my $center = bounding_box_center([ map @{$_->points}, @edges ]);
                 my $x = my $y = 0;
                 foreach my $point (map @{$_->points}, @edges) {