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52 lines
1.9 KiB
Python
52 lines
1.9 KiB
Python
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# 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 collections.abc import Sequence
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from ifcopenshell import entity_instance
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import ifcopenshell.api.alignment
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from ifcopenshell.api.alignment.get_mapped_segments import _get_curve_segment_count
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def get_curve_segment(layout: entity_instance, segment: entity_instance) -> entity_instance:
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"""
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Returns the IfcCurveSegment associated with the given alignment segment. If the curve segment does not exist, None is returned.
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Example:
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.. code:: python
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horizontal = model.by_type("IfcAlignmentHorizontal")[0]
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curve_segment = ifcopenshell.api.alignment.get_curve_segment(horizontal, alignment_segment)
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"""
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index = 0
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segment_nest = ifcopenshell.api.alignment.get_alignment_segment_nest(layout)
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for related_object in segment_nest.RelatedObjects:
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if related_object == segment:
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break
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n = _get_curve_segment_count(related_object)
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index += n
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curve = ifcopenshell.api.alignment.get_layout_curve(layout)
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if curve and index < len(curve.Segments):
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return curve.Segments[index]
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else:
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return None
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