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https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
90 lines
3.3 KiB
Python
90 lines
3.3 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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import ifcopenshell
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import ifcopenshell.api.owner
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import ifcopenshell.util.element
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def unassign_port(
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file: ifcopenshell.file, element: ifcopenshell.entity_instance, port: ifcopenshell.entity_instance
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) -> None:
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"""Unassigns a port to an element
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Ports are typically always assigned to a distribution element, but in
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some edge cases you may want to unassign the port to create an orphaned
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port for cleaning or patchin purposes.
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:param element: The IfcDistributionElement to unassign the port from.
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:type element: ifcopenshell.entity_instance
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:param port: The IfcDistributionPort you want to unassign.
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:type port: ifcopenshell.entity_instance
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:return: None
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:rtype: None
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Example:
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.. code:: python
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# Create a duct
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duct = ifcopenshell.api.root.create_entity(model,
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ifc_class="IfcDuctSegment", predefined_type="RIGIDSEGMENT")
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# Create 2 ports, one for either end.
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port1 = ifcopenshell.api.system.add_port(model, element=duct)
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port2 = ifcopenshell.api.system.add_port(model, element=duct)
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# Unassign one port for some weird reason.
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ifcopenshell.api.system.unassign_port(model, element=duct, port=port1)
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"""
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usecase = Usecase()
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usecase.file = file
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usecase.settings = {
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"element": element,
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"port": port,
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}
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return usecase.execute()
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class Usecase:
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def execute(self):
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if self.file.schema == "IFC2X3":
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return self.execute_ifc2x3()
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for rel in self.settings["element"].IsNestedBy or []:
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if self.settings["port"] in rel.RelatedObjects:
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if len(rel.RelatedObjects) == 1:
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history = rel.OwnerHistory
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self.file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(self.file, history)
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return
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related_objects = set(rel.RelatedObjects) or set()
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related_objects.remove(self.settings["port"])
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rel.RelatedObjects = list(related_objects)
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ifcopenshell.api.owner.update_owner_history(self.file, **{"element": rel})
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def execute_ifc2x3(self):
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for rel in self.settings["element"].HasPorts or []:
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if rel.RelatingPort == self.settings["port"]:
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history = rel.OwnerHistory
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self.file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(self.file, history)
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return
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