BCN3D-Cura-SourceCode

"""
Slice engine communication.
This module handles all communication with the slicing engine.
"""
__copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
import subprocess
import time
import math
import numpy
import os
import threading
import traceback
import platform
import urllib
import urllib2
import hashlib
import socket
import struct
import errno
import inspect

from Cura.util.bigDataStorage import BigDataStorage
from Cura.util import profile
from Cura.util import pluginInfo
from Cura.util import version
from Cura.util import gcodeInterpreter

def getEngineFilename():
	"""
		Finds and returns the path to the current engine executable. This is OS depended.
	:return: The full path to the engine executable.
	"""
	base_search_path = os.path.dirname(inspect.getfile(getEngineFilename))
	search_filename = 'CuraEngine'
	if platform.system() == 'Windows':
		search_filename += '.exe'
		if version.isDevVersion() and os.path.exists('C:/Software/Cura_SteamEngine/_bin/Release/Cura_SteamEngine.exe'):
			return 'C:/Software/Cura_SteamEngine/_bin/Release/Cura_SteamEngine.exe'
	for n in xrange(0, 10):
		full_filename = os.path.abspath(os.path.join(base_search_path, '/'.join(['..'] * n), search_filename))
		if os.path.isfile(full_filename):
			return full_filename
		full_filename = os.path.abspath(os.path.join(base_search_path, '/'.join(['..'] * n), 'CuraEngine', search_filename))
		if os.path.isfile(full_filename):
			return full_filename
	if os.path.isfile('/usr/bin/CuraEngine'):
		return '/usr/bin/CuraEngine'
	if os.path.isfile('/usr/local/bin/CuraEngine'):
		return '/usr/local/bin/CuraEngine'
	return ''

class EngineResult(object):
	"""
	Result from running the CuraEngine.
	Contains the engine log, polygons retrieved from the engine, the GCode and some meta-data.
	"""
	def __init__(self):
		self._engineLog = []
		self._gcodeData = BigDataStorage()
		self._polygons = []
		self._replaceInfo = {}
		self._success = False
		self._printTimeSeconds = None
		self._filamentMM = [0.0] * 4
		self._modelHash = None
		self._profileString = profile.getProfileString()
		self._preferencesString = profile.getPreferencesString()
		self._gcodeInterpreter = gcodeInterpreter.gcode()
		self._gcodeLoadThread = None
		self._finished = False

	def getFilamentWeight(self, e=0):
		#Calculates the weight of the filament in kg
		radius = profile.getProfileSettingFloat('filament_diameter') / 2
		volumeM3 = (self._filamentMM[e] * (math.pi * radius * radius)) / (1000*1000*1000)
		return volumeM3 * profile.getPreferenceFloat('filament_physical_density')

	def getFilamentCost(self, e=0):
		cost_kg = profile.getPreferenceFloat('filament_cost_kg')
		cost_meter = profile.getPreferenceFloat('filament_cost_meter')
		if cost_kg > 0.0 and cost_meter > 0.0:
			return "%.2f / %.2f" % (self.getFilamentWeight(e) * cost_kg, self._filamentMM[e] / 1000.0 * cost_meter)
		elif cost_kg > 0.0:
			return "%.2f" % (self.getFilamentWeight(e) * cost_kg)
		elif cost_meter > 0.0:
			return "%.2f" % (self._filamentMM[e] / 1000.0 * cost_meter)
		return None

	def getPrintTime(self):
		if self._printTimeSeconds is None:
			return ''
		if int(self._printTimeSeconds / 60 / 60) < 1:
			return _('%d minutes') % (int(self._printTimeSeconds / 60) % 60)
		if int(self._printTimeSeconds / 60 / 60) == 1:
			return _('%d hour %d minutes') % (int(self._printTimeSeconds / 60 / 60), int(self._printTimeSeconds / 60) % 60)
		return _('%d hours %d minutes') % (int(self._printTimeSeconds / 60 / 60), int(self._printTimeSeconds / 60) % 60)

	def getFilamentAmount(self, e=0):
		if self._filamentMM[e] == 0.0:
			return None
		return _('%0.2f meter %0.0f gram') % (float(self._filamentMM[e]) / 1000.0, self.getFilamentWeight(e) * 1000.0)

	def getFilamentAmountMeters(self, e=0):
		return float(self._filamentMM[e]) / 1000.0

	def getLog(self):
		return self._engineLog

	def getGCode(self):
		self._gcodeData.seekStart()
		return self._gcodeData

	def setGCode(self, gcode):
		self._gcodeData = BigDataStorage()
		self._gcodeData.write(gcode)
		self._replaceInfo = {}

	def addLog(self, line):
		self._engineLog.append(line)

	def setHash(self, hash):
		self._modelHash = hash

	def addReplaceTag(self, key, value):
		self._replaceInfo[key] = value

	def applyReplaceTags(self):
		self._gcodeData.replaceAtStart(self._replaceInfo)

	def setFinished(self, result):
		self._finished = result

	def isFinished(self):
		return self._finished

	def getGCodeLayers(self, loadCallback):
		if not self._finished:
			return None
		if self._gcodeInterpreter.layerList is None and self._gcodeLoadThread is None:
			self._gcodeInterpreter.progressCallback = self._gcodeInterpreterCallback
			self._gcodeLoadThread = threading.Thread(target=lambda : self._gcodeInterpreter.load(self._gcodeData.clone()))
			self._gcodeLoadCallback = loadCallback
			self._gcodeLoadThread.daemon = True
			self._gcodeLoadThread.start()
		return self._gcodeInterpreter.layerList

	def _gcodeInterpreterCallback(self, progress):
		if len(self._gcodeInterpreter.layerList) % 5 == 0:
			time.sleep(0.1)
		return self._gcodeLoadCallback(self, progress)

	def submitInfoOnline(self):
		if profile.getPreference('submit_slice_information') != 'True':
			return
		if version.isDevVersion():
			return
		data = {
			'processor': platform.processor(),
			'machine': platform.machine(),
			'platform': platform.platform(),
			'profile': self._profileString,
			'preferences': self._preferencesString,
			'modelhash': self._modelHash,
			'version': version.getVersion(),
			'printtime': self._printTimeSeconds,
			'filament': ','.join(map(str, self._filamentMM)),
		}
		try:
			f = urllib2.urlopen("https://stats.youmagine.com/curastats/slice", data = urllib.urlencode(data), timeout = 1)
			f.read()
			f.close()
		except:
			import traceback
			traceback.print_exc()

class Engine(object):
	"""
	Class used to communicate with the CuraEngine.
	The CuraEngine is ran as a 2nd process and reports back information trough stderr.
	GCode trough stdout and has a socket connection for polygon information and loading the 3D model into the engine.
	"""
	GUI_CMD_REQUEST_MESH = 0x01
	GUI_CMD_SEND_POLYGONS = 0x02
	GUI_CMD_FINISH_OBJECT = 0x03

	def __init__(self, progressCallback):
		self._process = None
		self._thread = None
		self._callback = progressCallback
		self._progressSteps = ['inset', 'skin', 'export']
		self._objCount = 0
		self._result = None

		self._engine_executable = getEngineFilename()
		self._serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		self._serverPortNr = 0xC20A
		for potential_port in xrange(0xC20A, 0xFFFF):
			self._serverPortNr = potential_port
			try:
				self._serversocket.bind(('127.0.0.1', self._serverPortNr))
				break
			except:
				print("Failed to listen on port: %d" % (self._serverPortNr))
		else:
			print("Failed to listen on any port, this is a fatal error")
			exit(10)
		thread = threading.Thread(target=self._socketListenThread)
		thread.daemon = True
		thread.start()

	def _socketListenThread(self):
		self._serversocket.listen(1)
		print 'Listening for engine communications on %d' % (self._serverPortNr)
		while True:
			try:
				sock, _ = self._serversocket.accept()
				thread = threading.Thread(target=self._socketConnectionThread, args=(sock,))
				thread.daemon = True
				thread.start()
			except socket.error, e:
				if e.errno != errno.EINTR:
					raise

	def _socketConnectionThread(self, sock):
		layerNrOffset = 0
		while True:
			try:
				data = sock.recv(4)
			except:
				data = ''
			if len(data) == 0:
				sock.close()
				return
			cmd = struct.unpack('@i', data)[0]
			if cmd == self.GUI_CMD_REQUEST_MESH:
				meshInfo = self._modelData[0]
				self._modelData = self._modelData[1:]
				sock.sendall(struct.pack('@i', meshInfo[0]))
				sock.sendall(meshInfo[1].tostring())
			elif cmd == self.GUI_CMD_SEND_POLYGONS:
				cnt = struct.unpack('@i', sock.recv(4))[0]
				layerNr = struct.unpack('@i', sock.recv(4))[0]
				layerNr += layerNrOffset
				z = struct.unpack('@i', sock.recv(4))[0]
				z = float(z) / 1000.0
				typeNameLen = struct.unpack('@i', sock.recv(4))[0]
				typeName = sock.recv(typeNameLen)
				while len(self._result._polygons) < layerNr + 1:
					self._result._polygons.append({})
				polygons = self._result._polygons[layerNr]
				if typeName not in polygons:
					polygons[typeName] = []
				for n in xrange(0, cnt):
					length = struct.unpack('@i', sock.recv(4))[0]
					data = ''
					while len(data) < length * 8 * 2:
						recvData = sock.recv(length * 8 * 2 - len(data))
						if len(recvData) < 1:
							return
						data += recvData
					polygon2d = numpy.array(numpy.fromstring(data, numpy.int64), numpy.float32) / 1000.0
					polygon2d = polygon2d.reshape((len(polygon2d) / 2, 2))
					polygon = numpy.empty((len(polygon2d), 3), numpy.float32)
					polygon[:,:-1] = polygon2d
					polygon[:,2] = z
					polygons[typeName].append(polygon)
			elif cmd == self.GUI_CMD_FINISH_OBJECT:
				layerNrOffset = len(self._result._polygons)
			else:
				print "Unknown command on socket: %x" % (cmd)

	def cleanup(self):
		self.abortEngine()
		self.wait()
		self._serversocket.close()

	def abortEngine(self):
		if self._process is not None:
			try:
				self._process.terminate()
			except:
				pass

	def wait(self):
		if self._thread is not None:
			self._thread.join()

	def getResult(self):
		return self._result

	def runEngine(self, scene, overrides = None):
		if len(scene.objects()) < 1:
			return
		self._thread = threading.Thread(target=self._runEngine, args=(scene, overrides, self._thread))
		self._thread.daemon = True
		self._thread.start()

	def _runEngine(self, scene, overrides, old_thread):
		if old_thread is not None:
			if self._process is not None:
				try:
					self._process.terminate()
				except:
					pass
			old_thread.join()
		self._callback(-1.0)

		extruderCount = 1
		for obj in scene.objects():
			if scene.checkPlatform(obj):
				extruderCount = max(extruderCount, len(obj._meshList))

		extruderCount = max(extruderCount, profile.minimalExtruderCount())

		if overrides is not None:
			for k, v in overrides.items():
				profile.setTempOverride(k, v)
		commandList = [self._engine_executable, '-v', '-p']
		for k, v in self._engineSettings(extruderCount).iteritems():
			commandList += ['-s', '%s=%s' % (k, str(v))]
		commandList += ['-g', '%d' % (self._serverPortNr)]
		if overrides is not None:
			profile.resetTempOverride()
		self._objCount = 0
		engineModelData = []
		hash = hashlib.sha512()
		order = scene.printOrder()
		if order is None:
			pos = numpy.array(profile.getMachineCenterCoords()) * 1000
			objMin = None
			objMax = None
			for obj in scene.objects():
				if scene.checkPlatform(obj):
					oMin = obj.getMinimum()[0:2] + obj.getPosition()
					oMax = obj.getMaximum()[0:2] + obj.getPosition()
					if objMin is None:
						objMin = oMin
						objMax = oMax
					else:
						objMin[0] = min(oMin[0], objMin[0])
						objMin[1] = min(oMin[1], objMin[1])
						objMax[0] = max(oMax[0], objMax[0])
						objMax[1] = max(oMax[1], objMax[1])
			if objMin is None:
				return
			pos += (objMin + objMax) / 2.0 * 1000
			commandList += ['-s', 'posx=%d' % int(pos[0]), '-s', 'posy=%d' % int(pos[1])]

			vertexTotal = [0] * 4
			meshMax = 1
			for obj in scene.objects():
				if scene.checkPlatform(obj):
					meshMax = max(meshMax, len(obj._meshList))
					for n in xrange(0, len(obj._meshList)):
						vertexTotal[n] += obj._meshList[n].vertexCount

			for n in xrange(0, meshMax):
				verts = numpy.zeros((0, 3), numpy.float32)
				for obj in scene.objects():
					if scene.checkPlatform(obj):
						if n < len(obj._meshList):
							vertexes = (numpy.matrix(obj._meshList[n].vertexes, copy = False) * numpy.matrix(obj._matrix, numpy.float32)).getA()
							vertexes -= obj._drawOffset
							vertexes += numpy.array([obj.getPosition()[0], obj.getPosition()[1], 0.0])
							verts = numpy.concatenate((verts, vertexes))
							hash.update(obj._meshList[n].vertexes.tostring())
				engineModelData.append((vertexTotal[n], verts))

			commandList += ['$' * meshMax]
			self._objCount = 1
		else:
			for n in order:
				obj = scene.objects()[n]
				for mesh in obj._meshList:
					engineModelData.append((mesh.vertexCount, mesh.vertexes))
					hash.update(mesh.vertexes.tostring())
				pos = obj.getPosition() * 1000
				pos += numpy.array(profile.getMachineCenterCoords()) * 1000
				commandList += ['-m', ','.join(map(str, obj._matrix.getA().flatten()))]
				commandList += ['-s', 'posx=%d' % int(pos[0]), '-s', 'posy=%d' % int(pos[1])]
				commandList += ['$' * len(obj._meshList)]
				self._objCount += 1
		modelHash = hash.hexdigest()
		if self._objCount < 1:
			return
		if self._thread != threading.currentThread():
			return

		self._modelData = engineModelData
		try:
			self._process = self._runEngineProcess(commandList)
		except OSError:
			traceback.print_exc()
			return

		self._result = EngineResult()
		self._result.addLog('Running: %s' % (' '.join(commandList)))
		self._result.setHash(modelHash)
		self._callback(0.0)

		logThread = threading.Thread(target=self._watchStderr, args=(self._process.stderr,))
		logThread.daemon = True
		logThread.start()

		try:
			data = self._process.stdout.read(4096)
			while len(data) > 0:
				if self._thread != threading.currentThread():
					self._process.terminate()
				self._result._gcodeData.write(data)
				data = self._process.stdout.read(4096)

			returnCode = self._process.wait()
			logThread.join()
			if returnCode == 0:
				self._result.addReplaceTag('#P_TIME#', self._result.getPrintTime())
				self._result.addReplaceTag('#F_AMNT#', self._result.getFilamentAmountMeters(0))
				self._result.addReplaceTag('#F_WGHT#', math.floor(self._result.getFilamentWeight(0) * 1000.0))
				self._result.addReplaceTag('#F_COST#', self._result.getFilamentCost(0))
				self._result.applyReplaceTags()
				plugin_error = pluginInfo.runPostProcessingPlugins(self._result)
				if plugin_error is not None:
					print plugin_error
					self._result.addLog(plugin_error)
				self._result.setFinished(True)
				self._callback(1.0)
			else:
				for line in self._result.getLog():
					print line
				self._callback(-1.0)
			self._process = None
		except MemoryError:
			traceback.print_exc()
			self._result.addLog("MemoryError")
			self._callback(-1.0)

	def _watchStderr(self, stderr):
		objectNr = 0
		line = stderr.readline()
		while len(line) > 0:
			line = line.strip()
			if line.startswith('Progress:'):
				line = line.split(':')
				if line[1] == 'process':
					objectNr += 1
				elif line[1] in self._progressSteps:
					progressValue = float(line[2]) / float(line[3])
					progressValue /= len(self._progressSteps)
					progressValue += 1.0 / len(self._progressSteps) * self._progressSteps.index(line[1])

					progressValue /= self._objCount
					progressValue += 1.0 / self._objCount * objectNr
					try:
						self._callback(progressValue)
					except:
						pass
			elif line.startswith('Print time:'):
				self._result._printTimeSeconds = int(line.split(':')[1].strip())
			elif line.startswith('Filament:'):
				self._result._filamentMM[0] = int(line.split(':')[1].strip())
				if profile.getMachineSetting('gcode_flavor') == 'UltiGCode':
					radius = profile.getProfileSettingFloat('filament_diameter') / 2.0
					self._result._filamentMM[0] /= (math.pi * radius * radius)
			elif line.startswith('Filament2:'):
				self._result._filamentMM[1] = int(line.split(':')[1].strip())
				if profile.getMachineSetting('gcode_flavor') == 'UltiGCode':
					radius = profile.getProfileSettingFloat('filament_diameter') / 2.0
					self._result._filamentMM[1] /= (math.pi * radius * radius)
			elif line.startswith('Replace:'):
				self._result.addReplaceTag(line.split(':')[1].strip(), line.split(':')[2].strip())
			else:
				self._result.addLog(line)
			line = stderr.readline()

	def _engineSettings(self, extruderCount):
		settings = {
			'nozzleSize': int(profile.getProfileSettingFloat('nozzle_size') * 1000),
			'layerThickness': int(profile.getProfileSettingFloat('layer_height') * 1000),
			'initialLayerThickness': int(profile.getProfileSettingFloat('bottom_thickness') * 1000) if profile.getProfileSettingFloat('bottom_thickness') > 0.0 else int(profile.getProfileSettingFloat('layer_height') * 1000),
			'filamentDiameter': int(profile.getProfileSettingFloat('filament_diameter') * 1000),
			'filamentFlow': int(profile.getProfileSettingFloat('filament_flow')),
			'extrusionWidth': int(profile.calculateEdgeWidth() * 1000),
			'layer0extrusionWidth': int(profile.calculateEdgeWidth() * profile.getProfileSettingFloat('layer0_width_factor') / 100 * 1000),
			'insetCount': int(profile.calculateLineCount()),
			'downSkinCount': int(profile.calculateSolidLayerCount()) if profile.getProfileSetting('solid_bottom') == 'True' else 0,
			'upSkinCount': int(profile.calculateSolidLayerCount()) if profile.getProfileSetting('solid_top') == 'True' else 0,
			'infillOverlap': int(profile.getProfileSettingFloat('fill_overlap')),
			'perimeterBeforeInfill': 1 if profile.getProfileSetting('perimeter_before_infill') == 'True' else 0,
			'initialSpeedupLayers': int(4),
			'initialLayerSpeed': int(profile.getProfileSettingFloat('bottom_layer_speed')),
			'printSpeed': int(profile.getProfileSettingFloat('print_speed')),
			'infillSpeed': int(profile.getProfileSettingFloat('infill_speed')) if int(profile.getProfileSettingFloat('infill_speed')) > 0 else int(profile.getProfileSettingFloat('print_speed')),
			'inset0Speed': int(profile.getProfileSettingFloat('inset0_speed')) if int(profile.getProfileSettingFloat('inset0_speed')) > 0 else int(profile.getProfileSettingFloat('print_speed')),
			'insetXSpeed': int(profile.getProfileSettingFloat('insetx_speed')) if int(profile.getProfileSettingFloat('insetx_speed')) > 0 else int(profile.getProfileSettingFloat('print_speed')),
			'skinSpeed': int(profile.getProfileSettingFloat('solidarea_speed')) if int(profile.getProfileSettingFloat('solidarea_speed')) > 0 else int(profile.getProfileSettingFloat('print_speed')),
			'moveSpeed': int(profile.getProfileSettingFloat('travel_speed')),
			'fanSpeedMin': int(profile.getProfileSettingFloat('fan_speed')) if profile.getProfileSetting('fan_enabled') == 'True' else 0,
			'fanSpeedMax': int(profile.getProfileSettingFloat('fan_speed_max')) if profile.getProfileSetting('fan_enabled') == 'True' else 0,
			'supportAngle': int(-1) if profile.getProfileSetting('support') == 'None' else int(profile.getProfileSettingFloat('support_angle')),
			'supportEverywhere': int(1) if profile.getProfileSetting('support') == 'Everywhere' else int(0),
			'supportLineDistance': int(100 * profile.calculateEdgeWidth() * 1000 / profile.getProfileSettingFloat('support_fill_rate')) if profile.getProfileSettingFloat('support_fill_rate') > 0 else -1,
			'supportXYDistance': int(1000 * profile.getProfileSettingFloat('support_xy_distance')),
			'supportZDistance': int(1000 * profile.getProfileSettingFloat('support_z_distance')),
			'supportExtruder': 0 if profile.getProfileSetting('support_dual_extrusion') == 'First extruder' else (1 if profile.getProfileSetting('support_dual_extrusion') == 'Second extruder' and profile.minimalExtruderCount() > 1 else -1),
			'retractionAmount': int(profile.getProfileSettingFloat('retraction_amount') * 1000) if profile.getProfileSetting('retraction_enable') == 'True' else 0,
			'retractionSpeed': int(profile.getProfileSettingFloat('retraction_speed')),
			'retractionMinimalDistance': int(profile.getProfileSettingFloat('retraction_min_travel') * 1000),
			'retractionAmountExtruderSwitch': int(profile.getProfileSettingFloat('retraction_dual_amount') * 1000),
			'retractionZHop': int(profile.getProfileSettingFloat('retraction_hop') * 1000),
			'minimalExtrusionBeforeRetraction': int(profile.getProfileSettingFloat('retraction_minimal_extrusion') * 1000),
			'multiVolumeOverlap': int(profile.getProfileSettingFloat('overlap_dual') * 1000),
			'objectSink': max(0, int(profile.getProfileSettingFloat('object_sink') * 1000)),
			'minimalLayerTime': int(profile.getProfileSettingFloat('cool_min_layer_time')),
			'minimalFeedrate': int(profile.getProfileSettingFloat('cool_min_feedrate')),
			'coolHeadLift': 1 if profile.getProfileSetting('cool_head_lift') == 'True' else 0,
			'startCode': profile.getAlterationFileContents('start.gcode', extruderCount),
			'endCode': profile.getAlterationFileContents('end.gcode', extruderCount),
			'preSwitchExtruderCode': profile.getAlterationFileContents('preSwitchExtruder.gcode', extruderCount),
			'postSwitchExtruderCode': profile.getAlterationFileContents('postSwitchExtruder.gcode', extruderCount),

			'extruderOffset[1].X': int(profile.getMachineSettingFloat('extruder_offset_x1') * 1000),
			'extruderOffset[1].Y': int(profile.getMachineSettingFloat('extruder_offset_y1') * 1000),
			'extruderOffset[2].X': int(profile.getMachineSettingFloat('extruder_offset_x2') * 1000),
			'extruderOffset[2].Y': int(profile.getMachineSettingFloat('extruder_offset_y2') * 1000),
			'extruderOffset[3].X': int(profile.getMachineSettingFloat('extruder_offset_x3') * 1000),
			'extruderOffset[3].Y': int(profile.getMachineSettingFloat('extruder_offset_y3') * 1000),
			'fixHorrible': 0,

			'acceleration': int(profile.getMachineSettingFloat('machine_acceleration') * 1000),
			'max_acceleration[0]': int(profile.getMachineSettingFloat('machine_max_acceleration[0]') * 1000),
			'max_acceleration[1]': int(profile.getMachineSettingFloat('machine_max_acceleration[1]') * 1000),
			'max_acceleration[2]': int(profile.getMachineSettingFloat('machine_max_acceleration[2]') * 1000),
			'max_acceleration[3]': int(profile.getMachineSettingFloat('machine_max_acceleration[3]') * 1000),
			'max_xy_jerk': int(profile.getMachineSettingFloat('machine_max_xy_jerk') * 1000),
			'max_z_jerk': int(profile.getMachineSettingFloat('machine_max_z_jerk') * 1000),
			'max_e_jerk': int(profile.getMachineSettingFloat('machine_max_e_jerk') * 1000),
		}
		fanFullHeight = int(profile.getProfileSettingFloat('fan_full_height') * 1000)
		settings['fanFullOnLayerNr'] = (fanFullHeight - settings['initialLayerThickness'] - 1) / settings['layerThickness'] + 1
		if settings['fanFullOnLayerNr'] < 0:
			settings['fanFullOnLayerNr'] = 0
		if profile.getProfileSetting('retraction_combing') == 'All':
			settings['enableCombing'] = 1
		elif profile.getProfileSetting('retraction_combing') == 'No Skin':
			settings['enableCombing'] = 2
		else:
			settings['enableCombing'] = 0
		if profile.getProfileSetting('support_type') == 'Lines':
			settings['supportType'] = 1

		if profile.getProfileSettingFloat('fill_density') == 0:
			settings['sparseInfillLineDistance'] = -1
		elif profile.getProfileSettingFloat('fill_density') == 100:
			settings['sparseInfillLineDistance'] = settings['extrusionWidth']
			#Set the up/down skins height to 10000 if we want a 100% filled object.
			# This gives better results then normal 100% infill as the sparse and up/down skin have some overlap.
			settings['downSkinCount'] = 10000
			settings['upSkinCount'] = 10000
		else:
			settings['sparseInfillLineDistance'] = int(100 * profile.calculateEdgeWidth() * 1000 / profile.getProfileSettingFloat('fill_density'))
		if profile.getProfileSetting('platform_adhesion') == 'Brim':
			settings['skirtDistance'] = 0
			settings['skirtLineCount'] = int(profile.getProfileSettingFloat('brim_line_count'))
		elif profile.getProfileSetting('platform_adhesion') == 'Raft':
			settings['skirtDistance'] = 0
			settings['skirtLineCount'] = 0
			settings['raftMargin'] = int(profile.getProfileSettingFloat('raft_margin') * 1000)
			settings['raftLineSpacing'] = int(profile.getProfileSettingFloat('raft_line_spacing') * 1000)
			settings['raftBaseThickness'] = int(profile.getProfileSettingFloat('raft_base_thickness') * 1000)
			settings['raftBaseLinewidth'] = int(profile.getProfileSettingFloat('raft_base_linewidth') * 1000)
			settings['raftInterfaceThickness'] = int(profile.getProfileSettingFloat('raft_interface_thickness') * 1000)
			settings['raftInterfaceLinewidth'] = int(profile.getProfileSettingFloat('raft_interface_linewidth') * 1000)
			settings['raftInterfaceLineSpacing'] = int(profile.getProfileSettingFloat('raft_interface_linewidth') * 1000 * 2.0)
			settings['raftAirGapLayer0'] = int(profile.getProfileSettingFloat('raft_airgap') * 1000 + profile.getProfileSettingFloat('raft_airgap_all') * 1000)
			settings['raftAirGap'] = int(profile.getProfileSettingFloat('raft_airgap_all') * 1000)
			settings['raftBaseSpeed'] = int(profile.getProfileSettingFloat('bottom_layer_speed'))
			settings['raftFanSpeed'] = 0
			settings['raftSurfaceThickness'] = int(profile.getProfileSettingFloat('raft_surface_thickness') * 1000)
			settings['raftSurfaceLinewidth'] = int(profile.getProfileSettingFloat('raft_surface_linewidth') * 1000)
			settings['raftSurfaceLineSpacing'] = int(profile.getProfileSettingFloat('raft_surface_linewidth') * 1000)
			settings['raftSurfaceLayers'] = int(profile.getProfileSettingFloat('raft_surface_layers'))
			settings['raftSurfaceSpeed'] = int(profile.getProfileSettingFloat('bottom_layer_speed'))
		else:
			settings['skirtDistance'] = int(profile.getProfileSettingFloat('skirt_gap') * 1000)
			settings['skirtLineCount'] = int(profile.getProfileSettingFloat('skirt_line_count'))
			settings['skirtMinLength'] = int(profile.getProfileSettingFloat('skirt_minimal_length') * 1000)

		if profile.getProfileSetting('fix_horrible_union_all_type_a') == 'True':
			settings['fixHorrible'] |= 0x01
		if profile.getProfileSetting('fix_horrible_union_all_type_b') == 'True':
			settings['fixHorrible'] |= 0x02
		if profile.getProfileSetting('fix_horrible_use_open_bits') == 'True':
			settings['fixHorrible'] |= 0x10
		if profile.getProfileSetting('fix_horrible_extensive_stitching') == 'True':
			settings['fixHorrible'] |= 0x04

		if settings['layerThickness'] <= 0:
			settings['layerThickness'] = 1000
		if profile.getMachineSetting('gcode_flavor') == 'UltiGCode':
			settings['gcodeFlavor'] = 1
		elif profile.getMachineSetting('gcode_flavor') == 'MakerBot':
			settings['gcodeFlavor'] = 2
		elif profile.getMachineSetting('gcode_flavor') == 'BFB':
			settings['gcodeFlavor'] = 3
		elif profile.getMachineSetting('gcode_flavor') == 'Mach3/LinuxCNC':
			settings['gcodeFlavor'] = 4
		elif profile.getMachineSetting('gcode_flavor') == 'RepRap (Volumetric)':
			settings['gcodeFlavor'] = 5
		if profile.getProfileSetting('spiralize') == 'True':
			settings['spiralizeMode'] = 1
		if profile.getProfileSetting('simple_mode') == 'True':
			settings['simpleMode'] = 1
		if profile.getProfileSetting('wipe_tower') == 'True' and extruderCount > 1:
			settings['wipeTowerSize'] = int(math.sqrt(profile.getProfileSettingFloat('wipe_tower_volume') * 1000 * 1000 * 1000 / settings['layerThickness']))
		if profile.getProfileSetting('ooze_shield') == 'True':
			settings['enableOozeShield'] = 1
		if profile.getPreference('startMode') == 'Simple':
			settings['nozzleSize'] = int(profile.getPreferenceFloat('simpleModeNozzle') * 1000)
		return settings

	def _runEngineProcess(self, cmdList):
		kwargs = {}
		if subprocess.mswindows:
			su = subprocess.STARTUPINFO()
			su.dwFlags |= subprocess.STARTF_USESHOWWINDOW
			su.wShowWindow = subprocess.SW_HIDE
			kwargs['startupinfo'] = su
			kwargs['creationflags'] = 0x00004000 #BELOW_NORMAL_PRIORITY_CLASS
		return subprocess.Popen(cmdList, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, **kwargs)