# Copyright (c) 2018 Ultimaker B.V. # Cura is released under the terms of the LGPLv3 or higher. from PyQt5.QtCore import Qt, QTimer from PyQt5.QtWidgets import QApplication from UM.Application import Application from UM.Math.Vector import Vector from UM.Tool import Tool from UM.Event import Event, MouseEvent from UM.Mesh.MeshBuilder import MeshBuilder from UM.Scene.Selection import Selection from cura.CuraApplication import CuraApplication from cura.Scene.CuraSceneNode import CuraSceneNode from cura.PickingPass import PickingPass from UM.Operations.GroupedOperation import GroupedOperation from UM.Operations.AddSceneNodeOperation import AddSceneNodeOperation from UM.Operations.RemoveSceneNodeOperation import RemoveSceneNodeOperation from cura.Operations.SetParentOperation import SetParentOperation from cura.Scene.SliceableObjectDecorator import SliceableObjectDecorator from cura.Scene.BuildPlateDecorator import BuildPlateDecorator from UM.Settings.SettingInstance import SettingInstance import numpy class SupportEraser(Tool): def __init__(self): super().__init__() self._shortcut_key = Qt.Key_E self._controller = self.getController() self._selection_pass = None CuraApplication.getInstance().globalContainerStackChanged.connect(self._updateEnabled) # Note: if the selection is cleared with this tool active, there is no way to switch to # another tool than to reselect an object (by clicking it) because the tool buttons in the # toolbar will have been disabled. That is why we need to ignore the first press event # after the selection has been cleared. Selection.selectionChanged.connect(self._onSelectionChanged) self._had_selection = False self._skip_press = False self._had_selection_timer = QTimer() self._had_selection_timer.setInterval(0) self._had_selection_timer.setSingleShot(True) self._had_selection_timer.timeout.connect(self._selectionChangeDelay) def event(self, event): super().event(event) modifiers = QApplication.keyboardModifiers() ctrl_is_active = modifiers & Qt.ControlModifier if event.type == Event.MousePressEvent and MouseEvent.LeftButton in event.buttons and self._controller.getToolsEnabled(): if ctrl_is_active: self._controller.setActiveTool("TranslateTool") return if self._skip_press: # The selection was previously cleared, do not add/remove an anti-support mesh but # use this click for selection and reactivating this tool only. self._skip_press = False return if self._selection_pass is None: # The selection renderpass is used to identify objects in the current view self._selection_pass = Application.getInstance().getRenderer().getRenderPass("selection") picked_node = self._controller.getScene().findObject(self._selection_pass.getIdAtPosition(event.x, event.y)) if not picked_node: # There is no slicable object at the picked location return node_stack = picked_node.callDecoration("getStack") if node_stack: if node_stack.getProperty("anti_overhang_mesh", "value"): self._removeEraserMesh(picked_node) return elif node_stack.getProperty("support_mesh", "value") or node_stack.getProperty("infill_mesh", "value") or node_stack.getProperty("cutting_mesh", "value"): # Only "normal" meshes can have anti_overhang_meshes added to them return # Create a pass for picking a world-space location from the mouse location active_camera = self._controller.getScene().getActiveCamera() picking_pass = PickingPass(active_camera.getViewportWidth(), active_camera.getViewportHeight()) picking_pass.render() picked_position = picking_pass.getPickedPosition(event.x, event.y) # Add the anti_overhang_mesh cube at the picked location self._createEraserMesh(picked_node, picked_position) def _createEraserMesh(self, parent: CuraSceneNode, position: Vector): node = CuraSceneNode() node.setName("Eraser") node.setSelectable(True) node.setCalculateBoundingBox(True) mesh = self._createCube(10) node.setMeshData(mesh.build()) node.calculateBoundingBoxMesh() active_build_plate = CuraApplication.getInstance().getMultiBuildPlateModel().activeBuildPlate node.addDecorator(BuildPlateDecorator(active_build_plate)) node.addDecorator(SliceableObjectDecorator()) stack = node.callDecoration("getStack") # created by SettingOverrideDecorator that is automatically added to CuraSceneNode settings = stack.getTop() definition = stack.getSettingDefinition("anti_overhang_mesh") new_instance = SettingInstance(definition, settings) new_instance.setProperty("value", True) new_instance.resetState() # Ensure that the state is not seen as a user state. settings.addInstance(new_instance) op = GroupedOperation() # First add node to the scene at the correct position/scale, before parenting, so the eraser mesh does not get scaled with the parent op.addOperation(AddSceneNodeOperation(node, self._controller.getScene().getRoot())) op.addOperation(SetParentOperation(node, parent)) op.push() node.setPosition(position, CuraSceneNode.TransformSpace.World) CuraApplication.getInstance().getController().getScene().sceneChanged.emit(node) def _removeEraserMesh(self, node: CuraSceneNode): parent = node.getParent() if parent == self._controller.getScene().getRoot(): parent = None op = RemoveSceneNodeOperation(node) op.push() if parent and not Selection.isSelected(parent): Selection.add(parent) CuraApplication.getInstance().getController().getScene().sceneChanged.emit(node) def _updateEnabled(self): plugin_enabled = False global_container_stack = CuraApplication.getInstance().getGlobalContainerStack() if global_container_stack: plugin_enabled = global_container_stack.getProperty("anti_overhang_mesh", "enabled") CuraApplication.getInstance().getController().toolEnabledChanged.emit(self._plugin_id, plugin_enabled) def _onSelectionChanged(self): # When selection is passed from one object to another object, first the selection is cleared # and then it is set to the new object. We are only interested in the change from no selection # to a selection or vice-versa, not in a change from one object to another. A timer is used to # "merge" a possible clear/select action in a single frame if Selection.hasSelection() != self._had_selection: self._had_selection_timer.start() def _selectionChangeDelay(self): has_selection = Selection.hasSelection() if not has_selection and self._had_selection: self._skip_press = True else: self._skip_press = False self._had_selection = has_selection def _createCube(self, size): mesh = MeshBuilder() # Can't use MeshBuilder.addCube() because that does not get per-vertex normals # Per-vertex normals require duplication of vertices s = size / 2 verts = [ # 6 faces with 4 corners each [-s, -s, s], [-s, s, s], [ s, s, s], [ s, -s, s], [-s, s, -s], [-s, -s, -s], [ s, -s, -s], [ s, s, -s], [ s, -s, -s], [-s, -s, -s], [-s, -s, s], [ s, -s, s], [-s, s, -s], [ s, s, -s], [ s, s, s], [-s, s, s], [-s, -s, s], [-s, -s, -s], [-s, s, -s], [-s, s, s], [ s, -s, -s], [ s, -s, s], [ s, s, s], [ s, s, -s] ] mesh.setVertices(numpy.asarray(verts, dtype=numpy.float32)) indices = [] for i in range(0, 24, 4): # All 6 quads (12 triangles) indices.append([i, i+2, i+1]) indices.append([i, i+3, i+2]) mesh.setIndices(numpy.asarray(indices, dtype=numpy.int32)) mesh.calculateNormals() return mesh