74 lines
3.0 KiB
Python
74 lines
3.0 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.util.element
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def disconnect_port(file: ifcopenshell.file, port: ifcopenshell.entity_instance) -> None:
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"""Disconnects a port from any other port
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A port may only be connected to one other port, so the other port is not
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needed to be specified.
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:param port: The IfcDistributionPort to disconnect.
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:return: None
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Example:
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.. code:: python
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# A completely empty distribution system
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system = ifcopenshell.api.system.add_system(model)
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# Create a duct and a 90 degree bend fitting
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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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fitting = ifcopenshell.api.root.create_entity(model,
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ifc_class="IfcDuctFitting", predefined_type="BEND")
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# The duct and fitting is part of the system
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ifcopenshell.api.system.assign_system(model, products=[duct], system=system)
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ifcopenshell.api.system.assign_system(model, products=[fitting], system=system)
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# Create 2 ports, one for either end of both the duct and fitting.
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duct_port1 = ifcopenshell.api.system.add_port(model, element=duct)
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duct_port2 = ifcopenshell.api.system.add_port(model, element=duct)
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fitting_port1 = ifcopenshell.api.system.add_port(model, element=fitting)
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fitting_port2 = ifcopenshell.api.system.add_port(model, element=fitting)
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# Connect the duct and fitting together. At this point, we have not
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# yet determined the direction of the flow, so we leave direction as
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# NOTDEFINED.
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ifcopenshell.api.system.connect_port(model, port1=duct_port2, port2=fitting_port1)
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# Disconnect the port. note we could've equally disconnected
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# fitting_port1 instead of duct_port2
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ifcopenshell.api.system.disconnect_port(model, port=duct_port2)
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"""
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rels = port.ConnectedTo or ()
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rels += port.ConnectedFrom or ()
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for rel in rels:
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rel.RelatingPort.FlowDirection = None
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rel.RelatedPort.FlowDirection = None
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history = rel.OwnerHistory
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file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(file, history)
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