68 lines
2.5 KiB
Python
68 lines
2.5 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_flow_control(
|
|
file: ifcopenshell.file,
|
|
relating_flow_element: ifcopenshell.entity_instance,
|
|
related_flow_control: ifcopenshell.entity_instance,
|
|
) -> None:
|
|
"""Unassigns flow control element from the flow element.
|
|
|
|
:param related_flow_control: IfcDistributionControlElement controling the
|
|
flow element
|
|
:param relating_flow_element: The IfcDistributionFlowElement that is being controlled
|
|
:return: None
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
# assign control to the flow element
|
|
flow_element = file.createIfcFlowSegment()
|
|
flow_control = file.createIfcController()
|
|
relation = ifcopenshell.api.system.assign_flow_control(
|
|
file, relating_control=flow_control, related_object=flow_element
|
|
)
|
|
|
|
# und unassign it
|
|
ifcopenshell.api.system.unassign_flow_control(file,
|
|
relating_control=flow_control, related_object=flow_element
|
|
)
|
|
"""
|
|
|
|
if not related_flow_control.AssignedToFlowElement:
|
|
return
|
|
assignment = related_flow_control.AssignedToFlowElement[0]
|
|
if assignment.RelatingFlowElement != relating_flow_element:
|
|
return
|
|
if len(assignment.RelatedControlElements) == 1:
|
|
history = assignment.OwnerHistory
|
|
file.remove(assignment)
|
|
if history:
|
|
ifcopenshell.util.element.remove_deep2(file, history)
|
|
return
|
|
related_flow_controls = list(assignment.RelatedControlElements)
|
|
related_flow_controls.remove(related_flow_control)
|
|
assignment.RelatedControlElements = related_flow_controls
|
|
ifcopenshell.api.owner.update_owner_history(file, element=assignment)
|