Updates alignment api. Fixes bugs authoring semantic-only alignment

src/ifcopenshell-python/ifcopenshell/api/alignment/_map_alignment_segment.py

@@ -0,0 +1,49 @@
+# 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/>.
+
+from collections.abc import Sequence
+
+import ifcopenshell
+from ifcopenshell import entity_instance
+
+from ifcopenshell.api.alignment._map_alignment_cant_segment import (
+    _map_alignment_cant_segment,
+)
+from ifcopenshell.api.alignment._map_alignment_horizontal_segment import (
+    _map_alignment_horizontal_segment,
+)
+from ifcopenshell.api.alignment._map_alignment_vertical_segment import (
+    _map_alignment_vertical_segment,
+)
+
+
+def _map_alignment_segment(
+    file: ifcopenshell.file, layout: entity_instance, segment: entity_instance
+) -> Sequence[entity_instance]:
+    """
+    Maps an IfcAlignmentSegment to its corresponding IfcCurveSegment(s) in the geometric representation.
+    The mapping is done based on the layout type and segment type.
+    """
+    if layout.is_a("IfcAlignmentHorizontal"):
+        mapped_segments = _map_alignment_horizontal_segment(file, segment)
+    elif layout.is_a("IfcAlignmentVertical"):
+        mapped_segments = _map_alignment_vertical_segment(file, segment)
+    else:
+        mapped_segments = _map_alignment_cant_segment(file, segment, layout.RailHeadDistance)
+
+    return mapped_segments