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https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
99 lines
4.0 KiB
Python
99 lines
4.0 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
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import ifcopenshell.util.element
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import ifcopenshell.util.placement
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class Usecase:
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def __init__(self, file, product=None, relating_object=None):
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"""Assigns an object as an aggregate to a product
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:param product: The part of the aggregate
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:param relating_object: The whole of the aggregate
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:return: entity: The aggregate relationship
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Example::
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element = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcSite")
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subelement = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuilding")
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ifcopenshell.api.run("aggregate.assign_object", model, product=subelement, relating_object=element)
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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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"relating_object": relating_object,
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}
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def execute(self):
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decomposes = None
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if self.settings["product"].Decomposes:
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decomposes = self.settings["product"].Decomposes[0]
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is_decomposed_by = None
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for rel in self.settings["relating_object"].IsDecomposedBy:
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if rel.is_a("IfcRelAggregates"):
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is_decomposed_by = rel
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break
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if decomposes and decomposes == is_decomposed_by:
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return
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container = ifcopenshell.util.element.get_container(self.settings["product"], should_get_direct=True)
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if container:
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ifcopenshell.api.run("spatial.remove_container", self.file, product=self.settings["product"])
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if decomposes:
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related_objects = list(decomposes.RelatedObjects)
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related_objects.remove(self.settings["product"])
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if related_objects:
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decomposes.RelatedObjects = related_objects
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ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": decomposes})
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else:
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self.file.remove(decomposes)
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if is_decomposed_by:
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related_objects = set(is_decomposed_by.RelatedObjects)
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related_objects.add(self.settings["product"])
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is_decomposed_by.RelatedObjects = list(related_objects)
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ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": is_decomposed_by})
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else:
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is_decomposed_by = self.file.create_entity(
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"IfcRelAggregates",
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**{
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"GlobalId": ifcopenshell.guid.new(),
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"OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", self.file),
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"RelatedObjects": [self.settings["product"]],
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"RelatingObject": self.settings["relating_object"],
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}
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)
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placement = getattr(self.settings["product"], "ObjectPlacement", None)
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if placement and placement.is_a("IfcLocalPlacement"):
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ifcopenshell.api.run(
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"geometry.edit_object_placement",
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self.file,
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product=self.settings["product"],
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matrix=ifcopenshell.util.placement.get_local_placement(self.settings["product"].ObjectPlacement),
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is_si=False,
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)
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return is_decomposed_by
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