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Cura/CuraEngineBackend.py

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from UM.Backend.Backend import Backend
from UM.Application import Application
from UM.Scene.SceneNode import SceneNode
from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
from UM.Preferences import Preferences
from UM.Math.Vector import Vector
from UM.Signal import Signal
from . import Cura_pb2
from . import ProcessSlicedObjectListJob
from . import ProcessGCodeJob
import threading
import struct
import numpy
from PyQt5.QtCore import QTimer
class CuraEngineBackend(Backend):
def __init__(self):
super().__init__()
Preferences.getInstance().addPreference('backend/location', '../PinkUnicornEngine/CuraEngine')
self._scene = Application.getInstance().getController().getScene()
self._scene.sceneChanged.connect(self._onSceneChanged)
self._settings = None
Application.getInstance().activeMachineChanged.connect(self._onActiveMachineChanged)
self._onActiveMachineChanged()
self._changeTimer = QTimer()
self._changeTimer.setInterval(500)
self._changeTimer.setSingleShot(True)
self._changeTimer.timeout.connect(self._onChangeTimerFinished)
self._message_handlers[Cura_pb2.SlicedObjectList] = self._onSlicedObjectListMessage
self._message_handlers[Cura_pb2.Progress] = self._onProgressMessage
self._message_handlers[Cura_pb2.GCodeLayer] = self._onGCodeLayerMessage
self._message_handlers[Cura_pb2.ObjectPrintTime] = self._onObjectPrintTimeMessage
self._center = None
self._slicing = False
self._restart = False
self.backendConnected.connect(self._onBackendConnected)
def getEngineCommand(self):
return [Preferences.getInstance().getValue("backend/location"), '--connect', "127.0.0.1:{0}".format(self._port)]
changeTimerFinished = Signal()
def _onSceneChanged(self, source):
if (type(source) is not SceneNode) or (source is self._scene.getRoot()):
return
self._onChanged()
def _onActiveMachineChanged(self):
if self._settings:
self._settings.settingChanged.disconnect(self._onSettingChanged)
self._settings = Application.getInstance().getActiveMachine()
if self._settings:
self._settings.settingChanged.connect(self._onSettingChanged)
self._onChanged()
def _onSettingChanged(self, setting):
self._onChanged()
def _onSlicedObjectListMessage(self, message):
job = ProcessSlicedObjectListJob.ProcessSlicedObjectListJob(message, self._center)
job.start()
def _onProgressMessage(self, message):
if message.amount >= 0.99:
self._slicing = False
self.processingProgress.emit(message.amount)
def _onGCodeLayerMessage(self, message):
job = ProcessGCodeJob.ProcessGCodeLayerJob(message)
job.start()
def _onObjectPrintTimeMessage(self, message):
pass
def _createSocket(self):
super()._createSocket()
self._socket.registerMessageType(1, Cura_pb2.ObjectList)
self._socket.registerMessageType(2, Cura_pb2.SlicedObjectList)
self._socket.registerMessageType(3, Cura_pb2.Progress)
self._socket.registerMessageType(4, Cura_pb2.GCodeLayer)
self._socket.registerMessageType(5, Cura_pb2.ObjectPrintTime)
self._socket.registerMessageType(6, Cura_pb2.SettingList)
def _onChanged(self):
if not self._settings:
return
self._changeTimer.start()
def _onChangeTimerFinished(self):
if self._slicing:
self._slicing = False
self._restart = True
if self._process is not None:
try:
self._process.terminate()
except: # terminating a process that is already terminating causes an exception, silently ignore this.
pass
return
objects = []
for node in DepthFirstIterator(self._scene.getRoot()):
if type(node) is SceneNode and node.getMeshData():
objects.append(node)
if not objects:
return #No point in slicing an empty build plate
self._slicing = True
self.processingProgress.emit(0.0)
self._sendSettings()
self._scene.acquireLock()
# Set the gcode as an empty list. This will be filled with strings by GCodeLayer messages.
# This is done so the gcode can be fragmented in memory and does not need a continues memory space.
# (AKA. This prevents MemoryErrors)
setattr(self._scene, 'gcode_list', [])
msg = Cura_pb2.ObjectList()
#TODO: All at once/one at a time mode
center = Vector()
for object in objects:
center += object.getPosition()
meshData = object.getMeshData().getTransformed(object.getWorldTransformation())
obj = msg.objects.add()
obj.id = id(object)
verts = numpy.array(meshData.getVertices(), copy=True)
verts[:,[1,2]] = verts[:,[2,1]]
obj.vertices = verts.tostring()
#if meshData.hasNormals():
#obj.normals = meshData.getNormalsAsByteArray()
#if meshData.hasIndices():
#obj.indices = meshData.getIndicesAsByteArray()
self._scene.releaseLock()
self._socket.sendMessage(msg)
def _sendSettings(self):
self._sendSettings_neith() if self._settings.getSettingValueByKey('wireframe') else self._sendSettings_normal()
def _sendSettings_neith(self):
extruder = 0
settings = {
'neith': 1,
'extruderNr': extruder,
'printTemperature': int(self._settings.getSettingValueByKey('material_print_temperature')),
'bedTemperature': int(self._settings.getSettingValueByKey('material_bed_temperature') * 100),
'filamentDiameter': int(self._settings.getSettingValueByKey('material_diameter') * 1000),
'retractionAmount': int(self._settings.getSettingValueByKey('retraction_amount') * 1000),
'retractionAmountPrime': int(0 * 1000),
# 'retractionAmountExtruderSwitch': int(fbk('') * 1000),
'retractionSpeed': int(self._settings.getSettingValueByKey('retraction_speed')),
'retractionPrimeSpeed': int(self._settings.getSettingValueByKey('retraction_speed')),
'retractionMinimalDistance': int(self._settings.getSettingValueByKey('retraction_min_travel') * 1000),
'retractionZHop': int(self._settings.getSettingValueByKey('retraction_hop') * 1000),
'moveSpeed': int(self._settings.getSettingValueByKey('speed_travel')),
'fanSpeedMin': self._settings.getSettingValueByKey('cool_fan_speed_min'),
'fanSpeedMax': self._settings.getSettingValueByKey('cool_fan_speed_max'),
# ================================
# wireframe printing options
# ================================
'wireframeConnectionHeight': int(self._settings.getSettingValueByKey('wireframe_height')*1000),
'wireframeNozzleClearance': int(self._settings.getSettingValueByKey('wireframe_nozzle_clearance')*1000),
'machineNozzleTipOuterDiameter': int(self._settings.getSettingValueByKey('machine_nozzle_tip_outer_diameter')*1000),
'machineNozzleHeadDistance': int(self._settings.getSettingValueByKey('machine_nozzle_head_distance')*1000),
'machineNozzleExpansionAngle': int(self._settings.getSettingValueByKey('machine_nozzle_expansion_angle')),
'wireframePrintspeedBottom': self._settings.getSettingValueByKey('wireframe_printspeed_bottom'),
'wireframePrintspeedUp': self._settings.getSettingValueByKey('wireframe_printspeed_up'),
'wireframePrintspeedDown': self._settings.getSettingValueByKey('wireframe_printspeed_down'),
'wireframePrintspeedFlat': self._settings.getSettingValueByKey('wireframe_printspeed_flat'),
'wireframeFlowConnection': int(self._settings.getSettingValueByKey('wireframe_flow_connection')),
'wireframeFlowFlat': int(self._settings.getSettingValueByKey('wireframe_flow_flat')),
'wireframeTopDelay': int(self._settings.getSettingValueByKey('wireframe_top_delay')*100),
'wireframeBottomDelay': int(self._settings.getSettingValueByKey('wireframe_bottom_delay')*100),
'wireframeFlatDelay': int(self._settings.getSettingValueByKey('wireframe_flat_delay')*100),
'wireframeUpDistHalfSpeed': int(self._settings.getSettingValueByKey('wireframe_up_half_speed')*1000),
'wireframeTopJump': int(self._settings.getSettingValueByKey('wireframe_top_jump')*1000),
'wireframeFallDown': int(self._settings.getSettingValueByKey('wireframe_fall_down')*1000),
'wireframeDragAlong': int(self._settings.getSettingValueByKey('wireframe_drag_along')*1000),
'wireframeStraightBeforeDown': int(self._settings.getSettingValueByKey('wireframe_straight_before_down')),
'wireframeRoofFallDown': int(self._settings.getSettingValueByKey('wireframe_roof_fall_down')*1000),
'wireframeRoofDragAlong': int(self._settings.getSettingValueByKey('wireframe_roof_drag_along')*1000),
'wireframeRoofOuterDelay': int(self._settings.getSettingValueByKey('wireframe_roof_outer_delay')*100),
'wireframeRoofInset': int(self._settings.getSettingValueByKey('wireframe_roof_inset')*1000),
}
wireFrameStrategy = self._settings.getSettingValueByKey('wireframe_strategy')
if wireFrameStrategy == 'Compensate':
settings['wireframeStrategy'] = 0
if wireFrameStrategy == 'Knot':
settings['wireframeStrategy'] = 1
if wireFrameStrategy == 'Retract':
settings['wireframeStrategy'] = 2
gcodeFlavor = self._settings.getSettingValueByKey('machine_gcode_flavor')
if gcodeFlavor == 'UltiGCode':
settings['gcodeFlavor'] = 1
elif gcodeFlavor == 'Makerbot':
settings['gcodeFlavor'] = 2
elif gcodeFlavor == 'BFB':
settings['gcodeFlavor'] = 3
elif gcodeFlavor == 'Mach3':
settings['gcodeFlavor'] = 4
elif gcodeFlavor == 'Volumetric':
settings['gcodeFlavor'] = 5
else:
settings['gcodeFlavor'] = 0
settings['startCode'] = self._settings.getSettingValueByKey('machine_start_gcode')
settings['endCode'] = self._settings.getSettingValueByKey('machine_end_gcode')
#for n in range(1, self._machine.getMaxNozzles()):
n = 1
settings['extruderOffset1.X'] = int(self._settings.getSettingValueByKey('machine_nozzle_offset_x_1') * 1000)
settings['extruderOffset1.Y'] = int(self._settings.getSettingValueByKey('machine_nozzle_offset_y_1') * 1000)
if not self._settings.getSettingValueByKey('machine_center_is_zero'):
settings['position.X'] = int((self._settings.getSettingValueByKey('machine_width') / 2.0) * 1000)
settings['position.Y'] = int((self._settings.getSettingValueByKey('machine_depth') / 2.0) * 1000)
self._center = Vector(self._settings.getSettingValueByKey('machine_width') / 2.0, 0.0, self._settings.getSettingValueByKey('machine_depth') / 2.0)
else:
settings['position.X'] = 0
settings['position.Y'] = 0
self._center = Vector(0.0, 0.0, 0.0)
settings['position.Z'] = 0
msg = Cura_pb2.SettingList()
for key, value in settings.items():
s = msg.settings.add()
s.name = key
s.value = str(value).encode('utf-8')
self._socket.sendMessage(msg)
def _sendSettings_normal(self):
extruder = 0
settings = {
'extruderNr': extruder,
'layerThickness': int(self._settings.getSettingValueByKey('layer_height') * 1000),
'initialLayerThickness': int(self._settings.getSettingValueByKey('layer_height_0') * 1000),
'printTemperature': int(self._settings.getSettingValueByKey('material_print_temperature')),
'bedTemperature': int(self._settings.getSettingValueByKey('material_bed_temperature') * 100),
'filamentDiameter': int(self._settings.getSettingValueByKey('material_diameter') * 1000),
'filamentFlow': int(self._settings.getSettingValueByKey('material_flow')),
'layer0extrusionWidth': int(self._settings.getSettingValueByKey('wall_line_width_0') * 1000),
'extrusionWidth': int(self._settings.getSettingValueByKey('wall_line_width_x') * 1000),
'insetCount': int(self._settings.getSettingValueByKey('wall_line_count')),
'downSkinCount': int(self._settings.getSettingValueByKey('bottom_layers')),
'upSkinCount': int(self._settings.getSettingValueByKey('top_layers')),
'skirtDistance': int(self._settings.getSettingValueByKey('skirt_gap') * 1000),
'skirtLineCount': int(self._settings.getSettingValueByKey('skirt_line_count')),
'skirtMinLength': int(self._settings.getSettingValueByKey('skirt_minimal_length') * 1000),
'retractionAmount': int(self._settings.getSettingValueByKey('retraction_amount') * 1000),
'retractionAmountPrime': int(0 * 1000),
# 'retractionAmountExtruderSwitch': int(fbk('') * 1000),
'retractionSpeed': int(self._settings.getSettingValueByKey('retraction_speed')),
'retractionPrimeSpeed': int(self._settings.getSettingValueByKey('retraction_speed')),
'retractionMinimalDistance': int(self._settings.getSettingValueByKey('retraction_min_travel') * 1000),
'minimalExtrusionBeforeRetraction': int(self._settings.getSettingValueByKey('retraction_minimal_extrusion') * 1000),
'retractionZHop': int(self._settings.getSettingValueByKey('retraction_hop') * 1000),
'enableCombing': 1 if self._settings.getSettingValueByKey('retraction_combing') else 0,
# 'enableOozeShield': int(fbk('') * 1000),
# 'wipeTowerSize': int(fbk('') * 1000),
# 'multiVolumeOverlap': int(fbk('') * 1000),
'initialSpeedupLayers': int(self._settings.getSettingValueByKey('speed_slowdown_layers')),
'initialLayerSpeed': int(self._settings.getSettingValueByKey('speed_layer_0')),
'skirtSpeed': int(self._settings.getSettingValueByKey('skirt_speed')),
'inset0Speed': int(self._settings.getSettingValueByKey('speed_wall_0')),
'insetXSpeed': int(self._settings.getSettingValueByKey('speed_wall_x')),
'supportSpeed': int(self._settings.getSettingValueByKey('speed_support')),
'moveSpeed': int(self._settings.getSettingValueByKey('speed_travel')),
#'fanFullOnLayerNr': int(fbk('cool_fan_full_layer')),
'infillOverlap': int(self._settings.getSettingValueByKey('fill_overlap')),
'infillSpeed': int(self._settings.getSettingValueByKey('speed_infill')),
'minimalLayerTime': int(self._settings.getSettingValueByKey('cool_min_layer_time')),
'minimalFeedrate': int(self._settings.getSettingValueByKey('cool_min_speed')),
'coolHeadLift': 1 if self._settings.getSettingValueByKey('cool_lift_head') else 0,
'fanSpeedMin': self._settings.getSettingValueByKey('cool_fan_speed_min'),
'fanSpeedMax': self._settings.getSettingValueByKey('cool_fan_speed_max'),
'spiralizeMode': 1 if self._settings.getSettingValueByKey('magic_spiralize') == 'True' else 0,
}
if self._settings.getSettingValueByKey('top_bottom_pattern') == 'Lines':
settings['skinPattern'] = 'SKIN_LINES'
elif self._settings.getSettingValueByKey('top_bottom_pattern') == 'Concentric':
settings['skinPattern'] = 'SKIN_CONCENTRIC'
if self._settings.getSettingValueByKey('fill_pattern') == 'Grid':
settings['infillPattern'] = 'INFILL_GRID'
elif self._settings.getSettingValueByKey('fill_pattern') == 'Triangles': # TODO add option to fdmPrinter.json once it has been translated(?)
settings['infillPattern'] = 'INFILL_TRIANGLES'
elif self._settings.getSettingValueByKey('fill_pattern') == 'Lines':
settings['infillPattern'] = 'INFILL_LINES'
elif self._settings.getSettingValueByKey('fill_pattern') == 'Concentric':
settings['infillPattern'] = 'INFILL_CONCENTRIC'
elif self._settings.getSettingValueByKey('fill_pattern') == 'ZigZag':
settings['infillPattern'] = 'INFILL_ZIGZAG'
adhesion_type = self._settings.getSettingValueByKey('adhesion_type')
if adhesion_type == 'Raft':
settings['raftMargin'] = int(self._settings.getSettingValueByKey('raft_margin') * 1000)
settings['raftLineSpacing'] = int(self._settings.getSettingValueByKey('raft_line_spacing') * 1000)
settings['raftBaseThickness'] = int(self._settings.getSettingValueByKey('raft_base_thickness') * 1000)
settings['raftBaseLinewidth'] = int(self._settings.getSettingValueByKey('raft_base_linewidth') * 1000)
settings['raftBaseSpeed'] = int(self._settings.getSettingValueByKey('raft_base_speed') * 1000)
settings['raftInterfaceThickness'] = int(self._settings.getSettingValueByKey('raft_interface_thickness') * 1000)
settings['raftInterfaceLinewidth'] = int(self._settings.getSettingValueByKey('raft_interface_linewidth') * 1000)
settings['raftInterfaceLineSpacing'] = int(self._settings.getSettingValueByKey('raft_line_spacing') * 1000)
settings['raftFanSpeed'] = 0
settings['raftSurfaceThickness'] = int(self._settings.getSettingValueByKey('layer_height_0') * 1000)
settings['raftSurfaceLinewidth'] = int(self._settings.getSettingValueByKey('wall_line_width_x') * 1000)
settings['raftSurfaceLineSpacing'] = int(self._settings.getSettingValueByKey('wall_line_width_x') * 1000)
settings['raftSurfaceLayers'] = int(self._settings.getSettingValueByKey('raft_surface_layers'))
settings['raftSurfaceSpeed'] = int(self._settings.getSettingValueByKey('speed_layer_0') * 1000)
settings['raftAirGap'] = int(self._settings.getSettingValueByKey('raft_airgap') * 1000)
settings['skirtLineCount'] = 0
pass
elif adhesion_type == 'Brim':
settings['skirtDistance'] = 0
settings['skirtLineCount'] = self._settings.getSettingValueByKey('brim_line_count')
if self._settings.getSettingValueByKey('support_type') == 'None':
settings['supportType'] = ''
settings['supportAngle'] = -1
else:
settings['supportType'] = 'LINES'
settings['supportAngle'] = self._settings.getSettingValueByKey('support_angle')
settings['supportOnBuildplateOnly'] = 1 if self._settings.getSettingValueByKey('support_type') == 'Touching Buildplate' else 0
settings['supportLineDistance'] = int(100 * self._settings.getSettingValueByKey('wall_line_width_x') * 1000 / self._settings.getSettingValueByKey('support_fill_rate'))
settings['supportXYDistance'] = int(self._settings.getSettingValueByKey('support_xy_distance') * 1000)
settings['supportZDistance'] = int(self._settings.getSettingValueByKey('support_z_distance') * 1000)
settings['supportZDistanceBottom'] = int(self._settings.getSettingValueByKey('support_top_distance') * 1000)
settings['supportZDistanceTop'] = int(self._settings.getSettingValueByKey('support_bottom_distance') * 1000)
settings['supportJoinDistance'] = int(self._settings.getSettingValueByKey('support_join_distance') * 1000)
settings['supportAreaSmoothing'] = int(self._settings.getSettingValueByKey('support_area_smoothing') * 1000)
settings['supportMinimalAreaSqrt'] = int(self._settings.getSettingValueByKey('support_minimal_diameter') * 1000) if self._settings.getSettingValueByKey('support_use_towers') else 0
settings['supportTowerDiameter'] = int(self._settings.getSettingValueByKey('support_tower_diameter') * 1000)
settings['supportTowerRoofAngle'] = int(self._settings.getSettingValueByKey('support_tower_roof_angle'))
settings['supportConnectZigZags'] = 1 if self._settings.getSettingValueByKey('support_connect_zigzags') else 0
settings['supportExtruder'] = -1
if self._settings.getSettingValueByKey('support_pattern') == 'Grid':
settings['supportType'] = 'GRID'
elif self._settings.getSettingValueByKey('support_pattern') == 'Lines':
settings['supportType'] = 'LINES'
elif self._settings.getSettingValueByKey('support_pattern') == 'ZigZag':
settings['supportType'] = 'ZIGZAG'
settings['sparseInfillLineDistance'] = -1
if self._settings.getSettingValueByKey('fill_sparse_density') >= 100:
settings['sparseInfillLineDistance'] = self._settings.getSettingValueByKey('wall_line_width_x')
settings['downSkinCount'] = 10000
settings['upSkinCount'] = 10000
elif self._settings.getSettingValueByKey('fill_sparse_density') > 0:
settings['sparseInfillLineDistance'] = int(100 * self._settings.getSettingValueByKey('wall_line_width_x') * 1000 / self._settings.getSettingValueByKey('fill_sparse_density'))
settings['sparseInfillCombineCount'] = int(round(self._settings.getSettingValueByKey('fill_sparse_combine')))
gcodeFlavor = self._settings.getSettingValueByKey('machine_gcode_flavor')
if gcodeFlavor == 'UltiGCode':
settings['gcodeFlavor'] = 1
elif gcodeFlavor == 'Makerbot':
settings['gcodeFlavor'] = 2
elif gcodeFlavor == 'BFB':
settings['gcodeFlavor'] = 3
elif gcodeFlavor == 'Mach3':
settings['gcodeFlavor'] = 4
elif gcodeFlavor == 'Volumetric':
settings['gcodeFlavor'] = 5
else:
settings['gcodeFlavor'] = 0
settings['startCode'] = self._settings.getSettingValueByKey('machine_start_gcode')
settings['endCode'] = self._settings.getSettingValueByKey('machine_end_gcode')
#for n in range(1, self._machine.getMaxNozzles()):
n = 1
settings['extruderOffset1.X'] = int(self._settings.getSettingValueByKey('machine_nozzle_offset_x_1') * 1000)
settings['extruderOffset1.Y'] = int(self._settings.getSettingValueByKey('machine_nozzle_offset_y_1') * 1000)
if not self._settings.getSettingValueByKey('machine_center_is_zero'):
settings['position.X'] = int((self._settings.getSettingValueByKey('machine_width') / 2.0) * 1000)
settings['position.Y'] = int((self._settings.getSettingValueByKey('machine_depth') / 2.0) * 1000)
self._center = Vector(self._settings.getSettingValueByKey('machine_width') / 2.0, 0.0, self._settings.getSettingValueByKey('machine_depth') / 2.0)
else:
settings['position.X'] = 0
settings['position.Y'] = 0
self._center = Vector(0.0, 0.0, 0.0)
settings['position.Z'] = 0
msg = Cura_pb2.SettingList()
for key, value in settings.items():
s = msg.settings.add()
s.name = key
s.value = str(value).encode('utf-8')
self._socket.sendMessage(msg)
def _onBackendConnected(self):
if self._restart:
self._onChanged()
self._restart = False
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