54 lines
2.1 KiB
Python
54 lines
2.1 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.api.alignment
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from ifcopenshell import entity_instance
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def get_layout_curve(layout: entity_instance) -> entity_instance:
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"""
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Returns the representation curve for the layout. This will be an IfcCompositeCurve, IfcGradientCurve, or IfcSegmentReferenceCurve
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for IfcAlignmentHorizontal, IfcAlignmentVertical, or IfcAlignmentCant, respectively.
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:param layout: An alignment layout
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:return: The geometric representation curve
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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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layout = ifcopenshell.api.get_horizontal_layout(alignment)
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composite_curve = ifcopenshell.api.alignment.get_layout_curve(layout)
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"""
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alignment = ifcopenshell.api.alignment.get_alignment(layout)
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curve = ifcopenshell.api.alignment.get_curve(alignment)
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if curve:
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if layout.is_a("IfcAlignmentHorizontal"):
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# Layout is horizontal so get the IfcCompositeCurve
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if curve.is_a("IfcGradientCurve"):
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curve = curve.BaseCurve
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elif curve.is_a("IfcSegmentedReferenceCurve"):
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curve = curve.BaseCurve.BaseCurve
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elif layout.is_a("IfcAlignmentVertical"):
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# Layout is vertical so get the IfcGradientCurve
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if curve.is_a("IfcSegmentedReferenceCurve"):
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curve = curve.BaseCurve
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return curve
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