From 6ac4302878001f60a5f66f9a603a150cae1959b8 Mon Sep 17 00:00:00 2001
From: daid303 <daid303@gmail.com>
Date: Wed, 2 Jan 2013 19:34:02 +0100
Subject: [PATCH] Add relative extrusion distance to GCode viewer, and let
 dimension export M83 on relative extrusion.

---
 .../skeinforge_plugins/craft_plugins/dimension.py          | 2 ++
 Cura/util/gcodeInterpreter.py                              | 7 +++++++
 2 files changed, 9 insertions(+)

diff --git a/Cura/cura_sf/skeinforge_application/skeinforge_plugins/craft_plugins/dimension.py b/Cura/cura_sf/skeinforge_application/skeinforge_plugins/craft_plugins/dimension.py
index 0d29205d..52ad2f62 100644
--- a/Cura/cura_sf/skeinforge_application/skeinforge_plugins/craft_plugins/dimension.py
+++ b/Cura/cura_sf/skeinforge_application/skeinforge_plugins/craft_plugins/dimension.py
@@ -384,6 +384,8 @@ class DimensionSkein(object):
 			self.absoluteDistanceMode = False
 		elif firstWord == '(<layer>':
 			self.layerIndex += 1
+			if self.layerIndex == 0 and self.repository.relativeExtrusionDistance.value:
+				self.distanceFeedRate.addLine('M83 ;Relative extrusion')
 			settings.printProgress(self.layerIndex, 'dimension')
 		elif firstWord == '(</layer>)' or firstWord == '(<supportLayer>)' or firstWord == '(</supportLayer>)':
 			if self.totalExtrusionDistance > 0.0 and not self.repository.relativeExtrusionDistance.value:
diff --git a/Cura/util/gcodeInterpreter.py b/Cura/util/gcodeInterpreter.py
index 1de7a6bf..043bab67 100644
--- a/Cura/util/gcodeInterpreter.py
+++ b/Cura/util/gcodeInterpreter.py
@@ -60,6 +60,7 @@ class gcode(object):
 		currentExtruder = 0
 		extrudeAmountMultiply = 1.0
 		totalMoveTimeMinute = 0.0
+		absoluteE = True
 		scale = 1.0
 		posAbs = True
 		feedRate = 3600
@@ -140,6 +141,8 @@ class gcode(object):
 						totalMoveTimeMinute += (oldPos - pos).vsize() / feedRate
 					moveType = 'move'
 					if e is not None:
+						if not absoluteE:
+							e += currentE
 						if posAbs:
 							if e > currentE:
 								moveType = 'extrude'
@@ -217,6 +220,10 @@ class gcode(object):
 						pass
 					elif M == 81:	#Suicide/disable power supply
 						pass
+					elif M == 82:   #Absolute E
+						absoluteE = True
+					elif M == 83:   #Relative E
+						absoluteE = False
 					elif M == 84:	#Disable step drivers
 						pass
 					elif M == 92:	#Set steps per unit
-- 
2.30.2