From 564a97d5a80545f5eebdc63de7c48a1a435ad2ea Mon Sep 17 00:00:00 2001
From: Ghostkeeper <rubend@tutanota.com>
Date: Thu, 4 Jan 2018 17:20:57 +0100
Subject: [PATCH] Account for getConvexHullTransformedVertices returning None

It returns None if there are no vertices.
---
 cura/Scene/ConvexHullDecorator.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cura/Scene/ConvexHullDecorator.py b/cura/Scene/ConvexHullDecorator.py
index 3a563c2764..94045652f5 100644
--- a/cura/Scene/ConvexHullDecorator.py
+++ b/cura/Scene/ConvexHullDecorator.py
@@ -177,7 +177,7 @@ class ConvexHullDecorator(SceneNodeDecorator):
                 # Do not throw away vertices: the convex hull may be too small and objects can collide.
                 # vertex_data = vertex_data[vertex_data[:,1] >= -0.01]
 
-                if len(vertex_data) >= 4:
+                if vertex_data and len(vertex_data) >= 4:
                     # Round the vertex data to 1/10th of a mm, then remove all duplicate vertices
                     # This is done to greatly speed up further convex hull calculations as the convex hull
                     # becomes much less complex when dealing with highly detailed models.