New option to enable streaming IFC data into BBIM.

To test, go into add-on preferences and enable "Should Stream". Then load an IFC-SPF in advanced mode, and disable "Load Geometry" before loading (the geometry iterator doesn't work with streaming).

src/blenderbim/blenderbim/bim/ifc.py

@@ -132,6 +132,8 @@ class IfcStore:
                     return
         elif extension.lower() == "ifcxml":
             IfcStore.file = ifcopenshell.file(ifcopenshell.ifcopenshell_wrapper.parse_ifcxml(path))
+        elif bpy.context.scene.BIMProjectProperties.should_stream:
+            IfcStore.file = ifcopenshell.open(path, should_stream=True)
         else:
             IfcStore.file = ifcopenshell.open(path)
 

src/blenderbim/blenderbim/bim/module/project/prop.py

@@ -148,6 +148,7 @@ class BIMProjectProperties(PropertyGroup):
         default="NONE",
     )
     should_merge_materials_by_colour: BoolProperty(name="Merge Materials by Colour", default=False)
+    should_stream: BoolProperty(name="Stream Data From IFC-SPF (Only for advanced users)", default=True)
     should_load_geometry: BoolProperty(name="Load Geometry", default=True)
     should_use_native_meshes: BoolProperty(name="Native Meshes", default=False)
     should_clean_mesh: BoolProperty(name="Clean Meshes", default=True)

src/blenderbim/blenderbim/bim/ui.py

@@ -214,6 +214,8 @@ class BIM_ADDON_preferences(bpy.types.AddonPreferences):
 
         row = layout.row()
         row.prop(context.scene.BIMProjectProperties, "should_disable_undo_on_save")
+        row = layout.row()
+        row.prop(context.scene.BIMProjectProperties, "should_stream")
 
         row = layout.row()
         row.prop(context.scene.BIMModelProperties, "occurrence_name_style")