79 lines
2.9 KiB
Python
79 lines
2.9 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.util.element
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def unassign_pset(
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file: ifcopenshell.file,
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products: list[ifcopenshell.entity_instance],
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pset: ifcopenshell.entity_instance,
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) -> None:
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"""Unassign property set from the provided elements.
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:param products: Elements (or element types) to assign the pset from.
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:param pset: Property set.
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Example:
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.. code:: python
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element1 = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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element2 = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
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ifcopenshell.api.pset.assign_pset(self.file, [element1, element2], pset)
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# Pset is now shared by 2 elements.
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assert ifcopenshell.util.element.get_elements_by_pset(pset) == {element1, element2}
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ifcopenshell.api.pset.unassign_pset(self.file, [element2], pset)
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# Pset was unassigned from element2.
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assert ifcopenshell.util.element.get_elements_by_pset(pset) == {element1}
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"""
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is_ifc2x3 = file.schema == "IFC2X3"
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products_occurrences: set[ifcopenshell.entity_instance] = set()
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products_types: set[ifcopenshell.entity_instance] = set()
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for product in products:
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if product.is_a("IfcTypeProduct"):
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products_types.add(product)
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else:
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products_occurrences.add(product)
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# Check occurrences using pset.
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if products_occurrences:
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rels = pset.PropertyDefinitionOf if is_ifc2x3 else pset.DefinesOccurrence
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for rel in rels:
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objs = set(rel.RelatedObjects)
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if not any(p in objs for p in products_occurrences):
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continue
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objs.difference_update(products_occurrences)
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if objs:
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rel.RelatedObjects = list(objs)
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else:
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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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for product in products_types:
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psets = list(product.HasPropertySets)
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psets.remove(pset)
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product.HasPropertySets = psets or None
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