mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
86 lines
2.8 KiB
Python
86 lines
2.8 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.owner
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import ifcopenshell.util.element
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def unassign_constraint(
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file: ifcopenshell.file,
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products: list[ifcopenshell.entity_instance],
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constraint: ifcopenshell.entity_instance,
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) -> None:
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"""Unassigns a constraint from a list of products
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The constraint will not be deleted and is available to be assigned to
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other products.
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:param products: The list of products the constraint applies to.
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:type products: list[ifcopenshell.entity_instance]
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:param constraint: The IfcObjective constraint
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:type constraint: ifcopenshell.entity_instance
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:return: None
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:rtype: None
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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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"products": products,
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"constraint": constraint,
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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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products = set(self.settings["products"])
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if not products:
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return
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self.constraint = self.settings["constraint"]
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rels = self.get_constraint_rels()
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related_objects = set()
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for rel in rels:
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related_objects.update(rel.RelatedObjects)
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if not related_objects.intersection(products):
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return
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for rel in rels:
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related_objects = set(rel.RelatedObjects)
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if not related_objects.intersection(products):
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continue
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related_objects -= products
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if related_objects:
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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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continue
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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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def get_constraint_rels(self) -> list[ifcopenshell.entity_instance]:
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rels = []
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for rel in self.file.get_inverse(self.constraint):
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if rel.is_a("IfcRelAssociatesConstraint"):
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rels.append(rel)
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return rels
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