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# Copyright (c) 2020 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.
from copy import deepcopy
from typing import cast, Dict, List, Optional
from UM.Application import Application
from UM.Math.AxisAlignedBox import AxisAlignedBox
from UM.Math.Polygon import Polygon # For typing.
from UM.Scene.SceneNode import SceneNode
from UM.Scene.SceneNodeDecorator import SceneNodeDecorator # To cast the deepcopy of every decorator back to SceneNodeDecorator.
import cura.CuraApplication # To get the build plate.
from cura.Settings.ExtruderStack import ExtruderStack # For typing.
from cura.Settings.SettingOverrideDecorator import SettingOverrideDecorator # For per-object settings.
class CuraSceneNode(SceneNode):
"""Scene nodes that are models are only seen when selecting the corresponding build plate
Note that many other nodes can just be UM SceneNode objects.
"""
def __init__(self, parent: Optional["SceneNode"] = None, visible: bool = True, name: str = "", no_setting_override: bool = False) -> None:
super().__init__(parent = parent, visible = visible, name = name)
if not no_setting_override:
self.addDecorator(SettingOverrideDecorator()) # Now we always have a getActiveExtruderPosition, unless explicitly disabled
self._outside_buildarea = False
def setOutsideBuildArea(self, new_value: bool) -> None:
self._outside_buildarea = new_value
def isOutsideBuildArea(self) -> bool:
return self._outside_buildarea or self.callDecoration("getBuildPlateNumber") < 0
def isVisible(self) -> bool:
return super().isVisible() and self.callDecoration("getBuildPlateNumber") == cura.CuraApplication.CuraApplication.getInstance().getMultiBuildPlateModel().activeBuildPlate
def isSelectable(self) -> bool:
return super().isSelectable() and self.callDecoration("getBuildPlateNumber") == cura.CuraApplication.CuraApplication.getInstance().getMultiBuildPlateModel().activeBuildPlate
def isSupportMesh(self) -> bool:
per_mesh_stack = self.callDecoration("getStack")
if not per_mesh_stack:
return False
return per_mesh_stack.getProperty("support_mesh", "value")
def getPrintingExtruder(self) -> Optional[ExtruderStack]:
"""Get the extruder used to print this node. If there is no active node, then the extruder in position zero is returned
TODO The best way to do it is by adding the setActiveExtruder decorator to every node when is loaded
"""
global_container_stack = Application.getInstance().getGlobalContainerStack()
if global_container_stack is None:
return None
per_mesh_stack = self.callDecoration("getStack")
extruders = global_container_stack.extruderList
# Use the support extruder instead of the active extruder if this is a support_mesh
if per_mesh_stack:
if per_mesh_stack.getProperty("support_mesh", "value"):
return extruders[int(global_container_stack.getExtruderPositionValueWithDefault("support_extruder_nr"))]
# It's only set if you explicitly choose an extruder
extruder_id = self.callDecoration("getActiveExtruder")
for extruder in extruders:
# Find out the extruder if we know the id.
if extruder_id is not None:
if extruder_id == extruder.getId():
return extruder
else: # If the id is unknown, then return the extruder in the position 0
try:
if extruder.getMetaDataEntry("position", default = "0") == "0": # Check if the position is zero
return extruder
except ValueError:
continue
# This point should never be reached
return None
def getDiffuseColor(self) -> List[float]:
"""Return the color of the material used to print this model"""
printing_extruder = self.getPrintingExtruder()
material_color = "#808080" # Fallback color
if printing_extruder is not None and printing_extruder.material:
material_color = printing_extruder.material.getMetaDataEntry("color_code", default = material_color)
# Colors are passed as rgb hex strings (eg "#ffffff"), and the shader needs
# an rgba list of floats (eg [1.0, 1.0, 1.0, 1.0])
return [
int(material_color[1:3], 16) / 255,
int(material_color[3:5], 16) / 255,
int(material_color[5:7], 16) / 255,
1.0
]
def collidesWithAreas(self, areas: List[Polygon]) -> bool:
"""Return if any area collides with the convex hull of this scene node"""
convex_hull = self.callDecoration("getPrintingArea")
if convex_hull:
if not convex_hull.isValid():
return False
# Check for collisions between provided areas and the object
for area in areas:
overlap = convex_hull.intersectsPolygon(area)
if overlap is None:
continue
return True
return False
def _calculateAABB(self) -> None:
"""Override of SceneNode._calculateAABB to exclude non-printing-meshes from bounding box"""
self._aabb = None
if self._mesh_data:
self._aabb = self._mesh_data.getExtents(self.getWorldTransformation(copy = False))
else: # If there is no mesh_data, use a bounding box that encompasses the local (0,0,0)
position = self.getWorldPosition()
self._aabb = AxisAlignedBox(minimum = position, maximum = position)
for child in self.getAllChildren():
if child.callDecoration("isNonPrintingMesh"):
# Non-printing-meshes inside a group should not affect push apart or drop to build plate
continue
if not child.getMeshData():
# Nodes without mesh data should not affect bounding boxes of their parents.
continue
if self._aabb is None:
self._aabb = child.getBoundingBox()
else:
self._aabb = self._aabb + child.getBoundingBox()
def __deepcopy__(self, memo: Dict[int, object]) -> "CuraSceneNode":
"""Taken from SceneNode, but replaced SceneNode with CuraSceneNode"""
copy = CuraSceneNode(no_setting_override = True) # Setting override will be added later
copy.setTransformation(self.getLocalTransformation(copy= False))
copy.setMeshData(self._mesh_data)
copy.setVisible(cast(bool, deepcopy(self._visible, memo)))
copy._selectable = cast(bool, deepcopy(self._selectable, memo))
copy._name = cast(str, deepcopy(self._name, memo))
for decorator in self._decorators:
copy.addDecorator(cast(SceneNodeDecorator, deepcopy(decorator, memo)))
for child in self._children:
copy.addChild(cast(SceneNode, deepcopy(child, memo)))
self.calculateBoundingBoxMesh()
return copy
def transformChanged(self) -> None:
self._transformChanged()
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