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69 lines
3.5 KiB
Python
69 lines
3.5 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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import ifcopenshell
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import ifcopenshell.api.aggregate
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import ifcopenshell.api.alignment
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import ifcopenshell.api.nest
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import ifcopenshell.api.unit
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from ifcopenshell.api.alignment._create_geometric_representation import (
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_create_geometric_representation,
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)
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def test_child_alignment_with_vertical_and_cant_gets_a_segmented_reference_curve():
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# IFC CT 4.1.4.4.1.2 "Reusing Horizontal Layout": a child IfcAlignment nests its own
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# IfcAlignmentVertical and IfcAlignmentCant while reusing the parent's horizontal layout. There
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# is no public API to build this today (add_vertical_layout() only ever creates children that
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# nest a single IfcAlignmentVertical), so the len(child_layouts) == 2 branch inside
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# _create_geometric_representation() -- which builds the child's IfcSegmentedReferenceCurve --
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# was unreachable and its `file.creatIfcShapeRepresentation` typo (missing "e") went unnoticed.
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# This constructs that scenario directly against the private helper to exercise the fix.
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file = ifcopenshell.file(schema="IFC4X3")
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project = file.createIfcProject(GlobalId=ifcopenshell.guid.new(), Name="Test")
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length = ifcopenshell.api.unit.add_si_unit(file, unit_type="LENGTHUNIT")
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ifcopenshell.api.unit.assign_unit(file, units=[length])
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# parent: horizontal + vertical, geometry deferred so _create_geometric_representation is
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# invoked exactly once, explicitly, below.
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parent_alignment = ifcopenshell.api.alignment.create(file, "Parent", include_vertical=True, include_geometry=False)
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# child: vertical + cant, both nested directly to a new child alignment, reusing the parent's
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# horizontal -- the CT 4.1.4.4.1.2 shape that has no builder function yet.
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child_alignment = file.createIfcAlignment(GlobalId=ifcopenshell.guid.new(), Name="Child of Parent")
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child_vertical_layout = file.createIfcAlignmentVertical(GlobalId=ifcopenshell.guid.new())
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child_cant_layout = file.createIfcAlignmentCant(GlobalId=ifcopenshell.guid.new(), RailHeadDistance=1.0)
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ifcopenshell.api.nest.assign_object(
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file, related_objects=[child_vertical_layout, child_cant_layout], relating_object=child_alignment
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)
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ifcopenshell.api.aggregate.assign_object(file, products=[child_alignment], relating_object=parent_alignment)
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# before the fix this raised AttributeError: 'file' object has no attribute
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# 'creatIfcShapeRepresentation'
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_create_geometric_representation(file, parent_alignment)
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curve = ifcopenshell.api.alignment.get_curve(child_alignment)
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assert curve is not None
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assert curve.is_a("IfcSegmentedReferenceCurve")
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assert curve.BaseCurve.is_a("IfcGradientCurve")
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assert child_alignment.ObjectPlacement == parent_alignment.ObjectPlacement
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test_child_alignment_with_vertical_and_cant_gets_a_segmented_reference_curve()
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