41 lines
1.5 KiB
Python
41 lines
1.5 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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from ifcopenshell import entity_instance
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def get_parent_alignment(alignment: entity_instance) -> entity_instance:
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"""
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Returns the parent alignment. When multiple vertical alignments share a horizontal alignment
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the horizontal alignment is nested to the parent alignment, a child alignment is aggregated
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to the parent alignment for each vertical alignment, and the vertical alignment is nested with
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its child alignment.
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Example:
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.. code:: python
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alignment = model.by_type("IfcAlignment")[0]
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parent = ifcopenshell.api.alignment.get_parent_alignment(alignment)
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"""
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for rel in alignment.Decomposes:
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if rel.RelatingObject.is_a("IfcAlignment"):
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return rel.RelatingObject
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return None
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