Alignment API updates to support new patch recipes

src/ifcopenshell-python/test/api/alignment/test_add_segment_to_layout.py

@@ -75,3 +75,5 @@ def test_add_segment_to_layout():
     assert (
         alignment_segment.IsNestedBy[0].RelatedObjects[0].is_a("IfcReferent")
     )  # a referent is automatically added at the start of the segment
+
+test_add_segment_to_layout()

src/ifcopenshell-python/test/api/alignment/test_add_vertical_alignment.py

@@ -28,13 +28,6 @@ def test_add_vertical_alignment():
     length = ifcopenshell.api.unit.add_si_unit(file, unit_type="LENGTHUNIT")
     ifcopenshell.api.unit.assign_unit(file, units=[length])
     geometric_representation_context = ifcopenshell.api.context.add_context(file, context_type="Model")
-    axis_model_representation_subcontext = ifcopenshell.api.context.add_context(
-        file,
-        context_type="Model",
-        context_identifier="Axis",
-        target_view="MODEL_VIEW",
-        parent=geometric_representation_context,
-    )
 
     alignment = ifcopenshell.api.alignment.create(file, "A1", include_vertical=False)
 

src/ifcopenshell-python/test/api/alignment/test_create.py

@@ -61,11 +61,25 @@ def test_create():
             assert cant != None
 
         # verify each layout has a zero length segment (which also tests if the geometry curve has a zero length segment)
-        alignments = [horiz, vert, cant]
-        for a in alignments:
-            if a != None:
-                segments = ifcopenshell.api.alignment.get_layout_segments(a)
+        layouts = [horiz, vert, cant]
+        for layout in layouts:
+            if layout != None:
+                segments = ifcopenshell.api.alignment.get_layout_segments(layout)
                 assert len(segments) == 1
-                assert ifcopenshell.api.alignment.has_zero_length_segment(
-                    a
-                )  # there is a check in this function for the geometry curve
+                assert ifcopenshell.api.alignment.has_zero_length_segment(layout)
+                curve = ifcopenshell.api.alignment.get_layout_curve(layout)
+                assert ifcopenshell.api.alignment.has_zero_length_segment(curve)
+
+        curves = file.by_type("IfcCompositeCurve")
+        for curve in curves:
+            assert ifcopenshell.api.alignment.has_zero_length_segment(curve)
+
+        curves = file.by_type("IfcGradientCurve")
+        for curve in curves:
+            assert ifcopenshell.api.alignment.has_zero_length_segment(curve)
+
+        curves = file.by_type("IfcSegmentedReferenceCurve")
+        for curve in curves:
+            assert ifcopenshell.api.alignment.has_zero_length_segment(curve)
+
+test_create()

src/ifcopenshell-python/test/api/alignment/test_update_fallback_position.py

@@ -0,0 +1,68 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2025 Thomas Krijnen <thomas@aecgeeks.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+import pytest
+import ifcopenshell.api.alignment
+
+
+def test_update_fallback_position():
+    file = ifcopenshell.file(schema="IFC4X3")
+    project = file.createIfcProject(GlobalId=ifcopenshell.guid.new(), Name="Test")
+    length = ifcopenshell.api.unit.add_conversion_based_unit(file, name="foot")
+    ifcopenshell.api.unit.assign_unit(file, units=[length])
+    geometric_representation_context = ifcopenshell.api.context.add_context(file, context_type="Model")
+    axis_model_representation_subcontext = ifcopenshell.api.context.add_context(
+        file,
+        context_type="Model",
+        context_identifier="Axis",
+        target_view="MODEL_VIEW",
+        parent=geometric_representation_context,
+    )
+
+    coordinates = [(500.0, 2500.0), (3340.0, 660.0), (4340.0, 5000.0), (7600.0, 4560.0), (8480.0, 2010.0)]
+    radii = [(1000.0), (1250.0), (950.0)]
+    vpoints = [(0.0, 100.0), (2000.0, 135.0), (5000.0, 105.0), (7400.0, 153.0), (9800.0, 105.0), (12800.0, 90.0)]
+    lengths = [(1600.0), (1200.0), (2000.0), (800.0)]
+
+    alignment = ifcopenshell.api.alignment.create_by_pi_method(
+        file, "TestAlignment", coordinates, radii, vpoints, lengths
+    )
+
+    basis_curve = ifcopenshell.api.alignment.get_basis_curve(alignment)
+    pde = file.createIfcPointByDistanceExpression(
+        DistanceAlong = file.createIfcLengthMeasure(4500.),
+        OffsetLateral = 20.0,
+        BasisCurve = basis_curve
+    )
+
+    placement = file.createIfcAxis2PlacementLinear(
+        Location = pde,
+    )
+
+    lp = file.createIfcLinearPlacement(RelativePlacement = placement)
+
+    assert lp.CartesianPosition == None
+
+    ifcopenshell.api.alignment.update_fallback_position(file,lp)
+
+    assert lp.CartesianPosition != None
+    assert lp.CartesianPosition.Location.Coordinates == pytest.approx((3781.0625905626425,2663.2859940077856,0.0))
+    assert lp.CartesianPosition.RefDirection.DirectionRatios == pytest.approx((0.22453152656315067, 0.9744668252840736, 0.0))
+    assert lp.CartesianPosition.Axis.DirectionRatios == pytest.approx((0.0, 0.0, 1.0))
+
+test_update_fallback_position()

src/ifcopenshell-python/test/util/test_alignment.py

@@ -18,7 +18,7 @@
 
 import ifcopenshell
 import ifcopenshell.api.unit
-import ifcopenshell.util.stationing as sta
+import ifcopenshell.util.alignment as sta
 
 
 def _test_si_stations():