# Copyright (c) 2015 Ultimaker B.V. # Cura is released under the terms of the AGPLv3 or higher. 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 UM.Logger import Logger from UM.Resources import Resources from UM.Settings.SettingOverrideDecorator import SettingOverrideDecorator from UM.Message import Message from cura.OneAtATimeIterator import OneAtATimeIterator from . import Cura_pb2 from . import ProcessSlicedObjectListJob from . import ProcessGCodeJob import os import sys import numpy from PyQt5.QtCore import QTimer from UM.i18n import i18nCatalog catalog = i18nCatalog("cura") class CuraEngineBackend(Backend): def __init__(self): super().__init__() # Find out where the engine is located, and how it is called. This depends on how Cura is packaged and which OS we are running on. default_engine_location = os.path.join(Application.getInstallPrefix(), "bin", "CuraEngine") if hasattr(sys, "frozen"): default_engine_location = os.path.join(os.path.dirname(os.path.abspath(sys.executable)), "CuraEngine") if sys.platform == "win32": default_engine_location += ".exe" default_engine_location = os.path.abspath(default_engine_location) Preferences.getInstance().addPreference("backend/location", default_engine_location) self._scene = Application.getInstance().getController().getScene() self._scene.sceneChanged.connect(self._onSceneChanged) # Workaround to disable layer view processing if layer view is not active. self._layer_view_active = False Application.getInstance().getController().activeViewChanged.connect(self._onActiveViewChanged) self._onActiveViewChanged() self._stored_layer_data = None self._profile = None Application.getInstance().getMachineManager().activeProfileChanged.connect(self._onActiveProfileChanged) self._onActiveProfileChanged() self._change_timer = QTimer() self._change_timer.setInterval(500) self._change_timer.setSingleShot(True) self._change_timer.timeout.connect(self.slice) 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.GCodePrefix] = self._onGCodePrefixMessage self._message_handlers[Cura_pb2.ObjectPrintTime] = self._onObjectPrintTimeMessage self._slicing = False self._restart = False self._save_gcode = True self._save_polygons = True self._report_progress = True self._enabled = True self._message = None self.backendConnected.connect(self._onBackendConnected) ## Get the command that is used to call the engine. # This is usefull for debugging and used to actually start the engine # \return list of commands and args / parameters. def getEngineCommand(self): return [Preferences.getInstance().getValue("backend/location"), "connect", "127.0.0.1:{0}".format(self._port), "-j", Resources.getPath(Resources.MachineDefinitions, "fdmprinter.json"), "-vv"] ## Emitted when we get a message containing print duration and material amount. This also implies the slicing has finished. # \param time The amount of time the print will take. # \param material_amount The amount of material the print will use. printDurationMessage = Signal() ## Emitted when the slicing process starts. slicingStarted = Signal() ## Emitted whne the slicing process is aborted forcefully. slicingCancelled = Signal() ## Perform a slice of the scene with the given set of settings. # # \param kwargs Keyword arguments. # Valid values are: # - settings: The settings to use for the slice. The default is the active machine. # - save_gcode: True if the generated gcode should be saved, False if not. True by default. # - save_polygons: True if the generated polygon data should be saved, False if not. True by default. # - force_restart: True if the slicing process should be forcefully restarted if it is already slicing. # If False, this method will do nothing when already slicing. True by default. # - report_progress: True if the slicing progress should be reported, False if not. Default is True. def slice(self, **kwargs): if not self._enabled: return if self._slicing: if not kwargs.get("force_restart", True): return self._slicing = False self._restart = True if self._process is not None: Logger.log("d", "Killing engine process") try: self._process.terminate() except: # terminating a process that is already terminating causes an exception, silently ignore this. pass self.slicingCancelled.emit() return Logger.log("d", "Preparing to send slice data to engine.") object_groups = [] if self._profile.getSettingValue("print_sequence") == "one_at_a_time": for node in OneAtATimeIterator(self._scene.getRoot()): temp_list = [] children = node.getAllChildren() children.append(node) for child_node in children: if type(child_node) is SceneNode and child_node.getMeshData() and child_node.getMeshData().getVertices() is not None: temp_list.append(child_node) object_groups.append(temp_list) else: temp_list = [] for node in DepthFirstIterator(self._scene.getRoot()): if type(node) is SceneNode and node.getMeshData() and node.getMeshData().getVertices() is not None: if not getattr(node, "_outside_buildarea", False): temp_list.append(node) if len(temp_list) == 0: self.processingProgress.emit(0.0) return object_groups.append(temp_list) #for node in DepthFirstIterator(self._scene.getRoot()): # if type(node) is SceneNode and node.getMeshData() and node.getMeshData().getVertices() is not None: # if not getattr(node, "_outside_buildarea", False): # objects.append(node) if len(object_groups) == 0: if self._message: self._message.hide() self._message = None return #No point in slicing an empty build plate if kwargs.get("profile", self._profile).hasErrorValue(): Logger.log('w', "Profile has error values. Aborting slicing") if self._message: self._message.hide() self._message = None self._message = Message(catalog.i18nc("@info:status", "Unable to slice. Please check your setting values for errors.")) self._message.show() return #No slicing if we have error values since those are by definition illegal values. # Remove existing layer data (if any) for node in DepthFirstIterator(self._scene.getRoot()): if type(node) is SceneNode and node.getMeshData(): if node.callDecoration("getLayerData"): Application.getInstance().getController().getScene().getRoot().removeChild(node) break Application.getInstance().getController().getScene().gcode_list = None self._slicing = True self.slicingStarted.emit() self._report_progress = kwargs.get("report_progress", True) if self._report_progress: self.processingProgress.emit(0.0) if not self._message: self._message = Message(catalog.i18nc("@info:status", "Slicing..."), 0, False, -1) self._message.show() else: self._message.setProgress(-1) self._sendSettings(kwargs.get("profile", self._profile)) 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) self._save_gcode = kwargs.get("save_gcode", True) if self._save_gcode: setattr(self._scene, "gcode_list", []) self._save_polygons = kwargs.get("save_polygons", True) slice_message = Cura_pb2.Slice() for group in object_groups: group_message = slice_message.object_lists.add() for object in group: mesh_data = object.getMeshData().getTransformed(object.getWorldTransformation()) obj = group_message.objects.add() obj.id = id(object) verts = numpy.array(mesh_data.getVertices()) verts[:,[1,2]] = verts[:,[2,1]] verts[:,1] *= -1 obj.vertices = verts.tostring() self._handlePerObjectSettings(object, obj) # Hack to add per-object settings also to the "MeshGroup" in CuraEngine # We really should come up with a better solution for this. self._handlePerObjectSettings(group[0], group_message) self._scene.releaseLock() Logger.log("d", "Sending data to engine for slicing.") self._socket.sendMessage(slice_message) def _onSceneChanged(self, source): if (type(source) is not SceneNode) or (source is self._scene.getRoot()) or (source.getMeshData() is None): return if(source.getMeshData().getVertices() is None): return self._onChanged() def _onActiveProfileChanged(self): if self._profile: self._profile.settingValueChanged.disconnect(self._onSettingChanged) self._profile = Application.getInstance().getMachineManager().getActiveProfile() if self._profile: self._profile.settingValueChanged.connect(self._onSettingChanged) self._onChanged() def _onSettingChanged(self, setting): self._onChanged() def _onSlicedObjectListMessage(self, message): if self._save_polygons: if self._layer_view_active: job = ProcessSlicedObjectListJob.ProcessSlicedObjectListJob(message) job.start() else : self._stored_layer_data = message def _onProgressMessage(self, message): if message.amount >= 0.99: self._slicing = False if self._message: self._message.setProgress(100) self._message.hide() self._message = None if self._message: self._message.setProgress(round(message.amount * 100)) if self._report_progress: self.processingProgress.emit(message.amount) def _onGCodeLayerMessage(self, message): if self._save_gcode: job = ProcessGCodeJob.ProcessGCodeLayerJob(message) job.start() def _onGCodePrefixMessage(self, message): if self._save_gcode: self._scene.gcode_list.insert(0, message.data.decode("utf-8", "replace")) def _onObjectPrintTimeMessage(self, message): self.printDurationMessage.emit(message.time, message.material_amount) self.processingProgress.emit(1.0) def _createSocket(self): super()._createSocket() self._socket.registerMessageType(1, Cura_pb2.Slice) 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) self._socket.registerMessageType(7, Cura_pb2.GCodePrefix) ## Manually triggers a reslice def forceSlice(self): self._change_timer.start() def _onChanged(self): if not self._profile: return self._change_timer.start() def _sendSettings(self, profile): msg = Cura_pb2.SettingList() for key, value in profile.getAllSettingValues(include_machine = True).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 def _onToolOperationStarted(self, tool): self._enabled = False # Do not reslice when a tool is doing it's 'thing' def _onToolOperationStopped(self, tool): self._enabled = True # Tool stop, start listening for changes again. self._onChanged() def _onActiveViewChanged(self): if Application.getInstance().getController().getActiveView(): view = Application.getInstance().getController().getActiveView() if view.getPluginId() == "LayerView": self._layer_view_active = True if self._stored_layer_data: job = ProcessSlicedObjectListJob.ProcessSlicedObjectListJob(self._stored_layer_data) job.start() else: self._layer_view_active = False def _handlePerObjectSettings(self, node, message): profile = node.callDecoration("getProfile") if profile: for key, value in profile.getChangedSettingValues().items(): setting = message.settings.add() setting.name = key setting.value = str(value).encode() object_settings = node.callDecoration("getAllSettingValues") if not object_settings: return for key, value in object_settings.items(): setting = message.settings.add() setting.name = key setting.value = str(value).encode()