From 82a4a92a702be767cda84c325738af755452ce78 Mon Sep 17 00:00:00 2001
From: Lipu Fei <lipu.fei815@gmail.com>
Date: Wed, 14 Jun 2017 13:11:09 +0200
Subject: [PATCH] Do not generate support when layer number is negative

CURA-3934
---
 src/FffGcodeWriter.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/FffGcodeWriter.cpp b/src/FffGcodeWriter.cpp
index e9114105a6..9a19d387a7 100644
--- a/src/FffGcodeWriter.cpp
+++ b/src/FffGcodeWriter.cpp
@@ -1459,6 +1459,13 @@ bool FffGcodeWriter::addSupportToGCode(const SliceDataStorage& storage, LayerPla
         return support_added;
     }
 
+    // when raft is enabled, we will get negative layer numbers
+    // in this case, we don't generate support
+    if (layer_nr < 0)
+    {
+        return support_added;
+    }
+
     const int support_roof_extruder_nr = getSettingAsIndex("support_roof_extruder_nr");
     const int support_bottom_extruder_nr = getSettingAsIndex("support_bottom_extruder_nr");
     int support_infill_extruder_nr = (layer_nr <= 0)? getSettingAsIndex("support_extruder_nr_layer_0") : getSettingAsIndex("support_infill_extruder_nr");