CURA-4772 Create a CuraSceneNode instead of a SceneNode when reading a

GCode. Avoid creating an empty CuraSceneNode if the node is already an
instance of it.

cura/CuraApplication.py

@@ -1432,7 +1432,9 @@ class CuraApplication(QtApplication):
         target_build_plate = self.getBuildPlateModel().activeBuildPlate if arrange_objects_on_load else -1
 
         for original_node in nodes:
-            node = CuraSceneNode()  # We want our own CuraSceneNode
+
+            # Create a CuraSceneNode just if the original node is not that type
+            node = original_node if isinstance(original_node, CuraSceneNode) else CuraSceneNode()
             node.setMeshData(original_node.getMeshData())
 
             node.setSelectable(True)

plugins/GCodeReader/FlavorParser.py

@@ -8,14 +8,14 @@ from UM.Logger import Logger
 from UM.Math.AxisAlignedBox import AxisAlignedBox
 from UM.Math.Vector import Vector
 from UM.Message import Message
-from UM.Scene.SceneNode import SceneNode
+from cura.Scene.CuraSceneNode import CuraSceneNode
 from UM.i18n import i18nCatalog
 from UM.Preferences import Preferences
 
 catalog = i18nCatalog("cura")
 
 from cura import LayerDataBuilder
-from cura import LayerDataDecorator
+from cura.LayerDataDecorator import LayerDataDecorator
 from cura.LayerPolygon import LayerPolygon
 from cura.Scene.GCodeListDecorator import GCodeListDecorator
 from cura.Settings.ExtruderManager import ExtruderManager
@@ -292,7 +292,7 @@ class FlavorParser:
         # We obtain the filament diameter from the selected printer to calculate line widths
         self._filament_diameter = Application.getInstance().getGlobalContainerStack().getProperty("material_diameter", "value")
 
-        scene_node = SceneNode()
+        scene_node = CuraSceneNode()
         # Override getBoundingBox function of the sceneNode, as this node should return a bounding box, but there is no
         # real data to calculate it from.
         scene_node.getBoundingBox = self._getNullBoundingBox
@@ -422,7 +422,7 @@ class FlavorParser:
         material_color_map[0, :] = [0.0, 0.7, 0.9, 1.0]
         material_color_map[1, :] = [0.7, 0.9, 0.0, 1.0]
         layer_mesh = self._layer_data_builder.build(material_color_map)
-        decorator = LayerDataDecorator.LayerDataDecorator()
+        decorator = LayerDataDecorator()
         decorator.setLayerData(layer_mesh)
         scene_node.addDecorator(decorator)
 

plugins/SimulationView/SimulationPass.py

@@ -106,7 +106,7 @@ class SimulationPass(RenderPass):
                 nozzle_node = node
                 nozzle_node.setVisible(False)
 
-            elif issubclass(type(node), SceneNode) and (node.getMeshData() or node.callDecoration("isBlockSlicing")) and node.isVisible() and node.callDecoration("getBuildPlateNumber") == active_build_plate:
+            elif issubclass(type(node), SceneNode) and (node.getMeshData() or node.callDecoration("isBlockSlicing")) and node.isVisible():
                 layer_data = node.callDecoration("getLayerData")
                 if not layer_data:
                     continue