mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 17:31:45 +00:00
Richard Brice
40f92d15c3
* Some basic COGO survey points functions * Update alignment api Includes defining alignment segment by segment, automatic geometry definitions, and automatric stationing and referents * Fixes bonsai import alignment from csv * Adds DMS angle conversion functions to COGO api * Updated per @civilx64 review comments * Fixes problem with segment representations * Fixes problem with segment transition codes * Allows for compound vertical and horizontal curves * Implements callbacks for referent naming * Renames angle_from_bearing to bearing2dd for consistency with ifcopenshell.util.geolocation.dms2dd. Removes angle_from_dms because it duplicates dms2dd * Documents register_referent_name_callback * Fixes all sorts of problems with Cant/SegRefCurve implementation * refactor referent unit tests to use a fixture for test setup * lint with black --------- Co-authored-by: Scott Lecher <civilx64@gmail.com>
55 lines
2.2 KiB
Python
55 lines
2.2 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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import ifcopenshell.util
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from ifcopenshell import entity_instance
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import ifcopenshell.util.representation
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def get_basis_curve(alignment: entity_instance) -> entity_instance:
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"""
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Returns the basis curve for an alignment. This curve is the geometric representation that is used
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as the basis curve for vertical and cant alignments.
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:param alignment: The alignment
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:return: The geometric representation that is used as a basis curve, typically an IfcCompositeCurve, or None if the alignment does not have a representation
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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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composite_curve = ifcopenshell.api.alignment.get_basis_curve(alignment)
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"""
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axis = None
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representations = ifcopenshell.util.representation.get_representations_iter(alignment)
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for representation in representations:
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if (representation.RepresentationIdentifier == "Axis" and representation.RepresentationType == "Curve2D") or (
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representation.RepresentationIdentifier == "FootPrint" and representation.RepresentationType == "Curve2D"
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):
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axis = representation
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return None if axis.Items == None or len(axis.Items) == 0 else axis.Items[0]
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if axis == None and 0 < len(alignment.Decomposes):
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parent_alignment = alignment.Decomposes[0].RelatingObject
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return get_basis_curve(parent_alignment)
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return None
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