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https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 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
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class Usecase:
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def __init__(self, file, product=None, system=None):
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"""Unassigns a product from a system
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:param product: The IfcDistributionElement to unassign from the system.
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:type product: ifcopenshell.entity_instance.entity_instance
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:param system: The IfcSystem you want to unassign the element from.
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:type system: ifcopenshell.entity_instance.entity_instance
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:return: None
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:rtype: None
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Example::
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# A completely empty distribution system
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system = ifcopenshell.api.run("system.add_system", model)
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# Create a duct
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duct = ifcopenshell.api.run("root.create_entity", model,
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ifc_class="IfcDuctSegment", predefined_type="RIGIDSEGMENT")
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# This duct is part of the system
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ifcopenshell.api.run("system.assign_system", model, product=duct, system=system)
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# Not anymore!
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ifcopenshell.api.run("system.unassign_system", model, product=duct, system=system)
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"""
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self.file = file
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self.settings = {
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"product": product,
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"system": system,
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}
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def execute(self):
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if not self.settings["system"].IsGroupedBy:
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return
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rel = self.settings["system"].IsGroupedBy[0]
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related_objects = set(rel.RelatedObjects) or set()
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related_objects.remove(self.settings["product"])
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if len(related_objects):
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rel.RelatedObjects = list(related_objects)
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ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": rel})
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else:
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self.file.remove(rel)
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