From d326f175c9931c83c26e5ccc7db221c0e5d85c61 Mon Sep 17 00:00:00 2001
From: Jaime van Kessel <nallath@gmail.com>
Date: Wed, 7 Dec 2016 12:57:30 +0100
Subject: [PATCH] Build volume is now correctly drawn if there is no object &
 bed adhesion is none

CURA-2625
---
 cura/BuildVolume.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cura/BuildVolume.py b/cura/BuildVolume.py
index f051f80210..511b66c46b 100644
--- a/cura/BuildVolume.py
+++ b/cura/BuildVolume.py
@@ -450,6 +450,10 @@ class BuildVolume(SceneNode):
         used_extruders = extruder_manager.getUsedExtruderStacks()
         disallowed_border_size = self._getEdgeDisallowedSize()
 
+        if not used_extruders:
+            # If no extruder is used, assume that the active extruder is used (else nothing is drawn)
+            used_extruders = [extruder_manager.getActiveExtruderStack()]
+
         result_areas = self._computeDisallowedAreasStatic(disallowed_border_size, used_extruders) #Normal machine disallowed areas can always be added.
         prime_areas = self._computeDisallowedAreasPrime(disallowed_border_size, used_extruders)
         prime_disallowed_areas = self._computeDisallowedAreasStatic(0, used_extruders) #Where the priming is not allowed to happen. This is not added to the result, just for collision checking.