# 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 UM.PluginRegistry import PluginRegistry from cura.OneAtATimeIterator import OneAtATimeIterator from . import Cura_pb2 from . import ProcessSlicedObjectListJob from . import ProcessGCodeJob from . import StartSliceJob 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 Application.getInstance().getMachineManager().activeMachineInstanceChanged.connect(self._onChanged) 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.proto.SlicedObjectList"] = self._onSlicedObjectListMessage self._message_handlers["cura.proto.Progress"] = self._onProgressMessage self._message_handlers["cura.proto.GCodeLayer"] = self._onGCodeLayerMessage self._message_handlers["cura.proto.GCodePrefix"] = self._onGCodePrefixMessage self._message_handlers["cura.proto.ObjectPrintTime"] = self._onObjectPrintTimeMessage self._slicing = False self._restart = False self._enabled = True self._always_restart = True self._message = None self.backendConnected.connect(self._onBackendConnected) Application.getInstance().getController().toolOperationStarted.connect(self._onToolOperationStarted) Application.getInstance().getController().toolOperationStopped.connect(self._onToolOperationStopped) Application.getInstance().getMachineManager().activeMachineInstanceChanged.connect(self._onInstanceChanged) ## 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): active_machine = Application.getInstance().getMachineManager().getActiveMachineInstance() if not active_machine: return None return [Preferences.getInstance().getValue("backend/location"), "connect", "127.0.0.1:{0}".format(self._port), "-j", active_machine.getMachineDefinition().getPath(), "-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. def slice(self): if not self._enabled: return if self._slicing: self._terminate() if self._message: self._message.hide() self._message = None self.slicingCancelled.emit() return if 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. self.processingProgress.emit(0.0) if self._message: self._message.setProgress(-1) #else: # self._message = Message(catalog.i18nc("@info:status", "Slicing..."), 0, False, -1) # self._message.show() self._scene.gcode_list = [] self._slicing = True job = StartSliceJob.StartSliceJob(self._profile, self._socket) job.start() job.finished.connect(self._onStartSliceCompleted) def _terminate(self): 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 def _onStartSliceCompleted(self, job): if job.getError() or job.getResult() != True: if self._message: self._message.hide() self._message = None return def _onSceneChanged(self, source): if type(source) is not SceneNode: return if source is self._scene.getRoot(): return if 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._layer_view_active: job = ProcessSlicedObjectListJob.ProcessSlicedObjectListJob(message) job.start() else : self._stored_layer_data = message def _onProgressMessage(self, message): if self._message: self._message.setProgress(round(message.amount * 100)) self.processingProgress.emit(message.amount) def _onGCodeLayerMessage(self, message): self._scene.gcode_list.append(message.data.decode("utf-8", "replace")) def _onGCodePrefixMessage(self, message): 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) self._slicing = False if self._message: self._message.setProgress(100) self._message.hide() self._message = None if self._always_restart: try: self._process.terminate() self._createSocket() except: # terminating a process that is already terminating causes an exception, silently ignore this. pass def _createSocket(self): super()._createSocket(os.path.abspath(os.path.join(PluginRegistry.getInstance().getPluginPath(self.getPluginId()), "Cura.proto"))) ## Manually triggers a reslice def forceSlice(self): self._change_timer.start() def _onChanged(self): if not self._profile: return self._change_timer.start() def _onBackendConnected(self): if self._restart: self._onChanged() self._restart = False def _onToolOperationStarted(self, tool): self._terminate() # Do not continue slicing once a tool has started 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() self._stored_layer_data = None else: self._layer_view_active = False def _onInstanceChanged(self): self._terminate() self.slicingCancelled.emit()