73 lines
2.8 KiB
Python
73 lines
2.8 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
|
|
# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
|
|
#
|
|
# This file is part of IfcOpenShell.
|
|
#
|
|
# IfcOpenShell is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# IfcOpenShell is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public License
|
|
# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import ifcopenshell
|
|
import ifcopenshell.api.owner
|
|
import ifcopenshell.util.element
|
|
|
|
|
|
def unassign_resource(
|
|
file: ifcopenshell.file,
|
|
relating_resource: ifcopenshell.entity_instance,
|
|
related_object: ifcopenshell.entity_instance,
|
|
) -> None:
|
|
"""Removes the relationship between a resource and object
|
|
|
|
:param relating_resource: The IfcResource to assign the object to.
|
|
:param related_object: The IfcProduct or IfcActor to assign to the
|
|
object.
|
|
:return: None
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
# Add our own crew
|
|
crew = ifcopenshell.api.resource.add_resource(model, ifc_class="IfcCrewResource")
|
|
|
|
# Add some a tower crane to our crew.
|
|
crane = ifcopenshell.api.resource.add_resource(model,
|
|
parent_resource=crew, ifc_class="IfcConstructionEquipmentResource", name="Tower Crane 01")
|
|
|
|
# Our tower crane will be placed via this physical product.
|
|
product = ifcopenshell.api.root.create_entity(model,
|
|
ifc_class="IfcBuildingElementProxy", predefined_type="CRANE")
|
|
|
|
# Let's assign our crane to the resource. The crane now represents
|
|
# the resource.
|
|
ifcopenshell.api.resource.assign_resource(model,
|
|
relating_resource=crane, related_object=product)
|
|
|
|
# Undo it.
|
|
ifcopenshell.api.resource.unassign_resource(model,
|
|
relating_resource=crane, related_object=product)
|
|
"""
|
|
for rel in related_object.HasAssignments or []:
|
|
if not rel.is_a("IfcRelAssignsToResource") or rel.RelatingResource != relating_resource:
|
|
continue
|
|
if len(rel.RelatedObjects) == 1:
|
|
history = rel.OwnerHistory
|
|
file.remove(rel)
|
|
if history:
|
|
ifcopenshell.util.element.remove_deep2(file, history)
|
|
return
|
|
related_objects = list(rel.RelatedObjects)
|
|
related_objects.remove(related_object)
|
|
rel.RelatedObjects = related_objects
|
|
ifcopenshell.api.owner.update_owner_history(file, element=rel)
|