mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-19 03:33:48 +00:00
Dion Moult
810e8df6fe
There was already some half written code with this intent it seems, so I just finished it up.
75 lines
3.0 KiB
Python
75 lines
3.0 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_product(
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file: ifcopenshell.file,
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relating_product: ifcopenshell.entity_instance,
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related_object: ifcopenshell.entity_instance,
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) -> None:
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"""Unassigns a product and an object (typically an annotation)
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Smart annotation objects can be associated with products so that they
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can annotate attributes and properties. This function lets you remove
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the association, so that you may change the assocation with another
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object later or leave the annotation as a "dumb" annotation.
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:param relating_product: The IfcProduct the object is related to
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:param related_object: The object (typically IfcAnnotation) that the
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product is related to
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:return: None
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Example:
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.. code:: python
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furniture = ifcopenshell.api.root.create_entity(model, ifc_class="IfcFurniture")
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annotation = ifcopenshell.api.root.create_entity(model, ifc_class="IfcAnnotation")
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ifcopenshell.api.drawing.assign_product(model,
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relating_product=furniture, related_object=annotation)
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# Let's change our mind and remove the relationship
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ifcopenshell.api.drawing.unassign_product(model,
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relating_product=furniture, related_object=annotation)
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"""
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if relating_product.is_a("IfcGridAxis"):
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grid = None
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for attribute in ("PartOfW", "PartOfV", "PartOfU"):
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if getattr(relating_product, attribute, None):
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grid = getattr(relating_product, attribute)[0]
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break
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relating_product = grid
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for rel in related_object.HasAssignments or []:
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if not rel.is_a("IfcRelAssignsToProduct") or rel.RelatingProduct != relating_product:
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continue
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if len(rel.RelatedObjects) == 1:
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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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return
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related_objects = list(rel.RelatedObjects)
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related_objects.remove(related_object)
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rel.RelatedObjects = related_objects
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ifcopenshell.api.owner.update_owner_history(file, element=rel)
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