mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-10 17:58:20 +00:00
Dion Moult
70 lines
3.1 KiB
Python
70 lines
3.1 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
|
|
import ifcopenshell.util.element
|
|
|
|
|
|
class Usecase:
|
|
def __init__(self, file, related_object=None):
|
|
"""Unassigns a related_object from its nest.
|
|
|
|
An object (the whole within a decomposition) is Nested by zero or one more smaller objects.
|
|
This function will remove this nesting relationship.
|
|
|
|
If the object is not part of a nesting relationship, nothing will happen.
|
|
|
|
:param related_object: The child of the nesting relationship, typically
|
|
an IfcElement.
|
|
:type related_object: ifcopenshell.entity_instance.entity_instance
|
|
:return: None if the nest has only one child, otherwise the IfcRelNests relationship instance
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
task = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcSite")
|
|
subtask1 = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuilding")
|
|
subtask2 = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuilding")
|
|
ifcopenshell.api.run("nest.assign_object", model, related_object=subtask1, relating_object=task)
|
|
ifcopenshell.api.run("nest.assign_object", model, related_object=subtask2, relating_object=task)
|
|
# The relationship is returned as task still has subtask2
|
|
rel = ifcopenshell.api.run("nest.unassign_object", model, related_object=subtask1)
|
|
# Nothing is returned, as the relationship has no related objects
|
|
ifcopenshell.api.run("nest.unassign_object", model, related_object=subtask2)
|
|
"""
|
|
self.file = file
|
|
self.settings = {"related_object": related_object}
|
|
|
|
def execute(self):
|
|
for rel in self.settings["related_object"].Nests or []:
|
|
if not rel.is_a("IfcRelNests"):
|
|
continue
|
|
if len(rel.RelatedObjects) == 1:
|
|
history = rel.OwnerHistory
|
|
self.file.remove(rel)
|
|
if history:
|
|
ifcopenshell.util.element.remove_deep2(self.file, history)
|
|
return
|
|
related_objects = list(rel.RelatedObjects)
|
|
related_objects.remove(self.settings["related_object"])
|
|
rel.RelatedObjects = related_objects
|
|
ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": rel})
|
|
return rel
|