From 396ea274c457dc74005b40a2897d5d9c37539451 Mon Sep 17 00:00:00 2001
From: Ghostkeeper <rubend@tutanota.com>
Date: Mon, 5 Mar 2018 09:23:21 +0100
Subject: [PATCH] Invert Y direction of nozzle offsets

If there is a Y offset it should now move the disallowed areas in the correct direction

The initial placement of the disallowed borders was already correct.

Fixes #1977.
---
 cura/BuildVolume.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cura/BuildVolume.py b/cura/BuildVolume.py
index 60e7a32857..1cdcf9971a 100755
--- a/cura/BuildVolume.py
+++ b/cura/BuildVolume.py
@@ -826,6 +826,7 @@ class BuildVolume(SceneNode):
             offset_y = extruder.getProperty("machine_nozzle_offset_y", "value")
             if offset_y is None:
                 offset_y = 0
+            offset_y = -offset_y #Y direction of g-code is the inverse of Y direction of Cura's scene space.
             result[extruder_id] = []
 
             for polygon in machine_disallowed_polygons: