From d02ee5cf809b3e6df54d5f4bf8f9eb5236c21f55 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Tue, 21 Feb 2017 17:43:28 +0100
Subject: [PATCH] By @lordofhyphens: only re-zoom if we have a valid bounding
 box, avoid a divide by 0 error.

---
 lib/Slic3r/GUI/3DScene.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/Slic3r/GUI/3DScene.pm b/lib/Slic3r/GUI/3DScene.pm
index 13306d26c6..aa2e9bca5d 100644
--- a/lib/Slic3r/GUI/3DScene.pm
+++ b/lib/Slic3r/GUI/3DScene.pm
@@ -608,7 +608,8 @@ sub zoom_to_bounding_box {
     # bounding box
     my $max_size = max(@{$bb->size}) * 2;
     my $min_viewport_size = min($self->GetSizeWH);
-    $self->_zoom($min_viewport_size / $max_size);
+    # only re-zoom if we have a valid bounding box, avoid a divide by 0 error.
+    $self->_zoom($min_viewport_size / $max_size) if ($max_size != 0);
     
     # center view around bounding box center
     $self->_camera_target($bb->center);