mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 09:21:46 +00:00
Richard Brice
46 lines
1.9 KiB
Python
46 lines
1.9 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2025 Thomas Krijnen <thomas@aecgeeks.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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from ifcopenshell import entity_instance
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def get_stationing_nest(file: ifcopenshell.file, alignment: entity_instance) -> entity_instance:
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"""
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Searches for the IfcRelNests that defines the alignment's stationing scheme.
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The returned nest is nested to the IfcAlignment and its RelatedObjects contains only the
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IfcReferent(s) (PredefinedType="STATION") that establish the alignment's starting station and
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any station equations along it, as created by add_stationing_referent. It does not contain any
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other kind of referent (e.g. key-point referents from update_key_point_referents live in their
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own, separate IfcRelNests).
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:param file:
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:param alignment: The IfcAlignment which hosts the stationing IfcReferent(s)
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:return: Returns the IfcRelNests or None
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"""
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if not alignment.is_a("IfcAlignment"):
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raise TypeError(f"Expected IfcAlignment, instead received {alignment.is_a()}")
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for nest in alignment.IsNestedBy:
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for related_object in nest.RelatedObjects:
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if related_object.is_a("IfcReferent"):
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return nest
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return None
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