First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# 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 ifcopenshell
+import ifcopenshell.api.alignment
+from ifcopenshell import entity_instance
+from ifcopenshell.api.alignment._add_segment_to_curve import _add_segment_to_curve
+from ifcopenshell.api.alignment._create_geometric_representation import (
+    _create_geometric_representation,
+)
+
+
+def create_representation(
+    file: ifcopenshell.file,
+    alignment: entity_instance,
+) -> None:
+    """
+    Creates the geometric representation of an alignment if it does not already exist.
+    This function is intended to be used when a model has only the semantic definition of an alignment
+    and you want to add the geometric representation.
+
+    If the alignments are complete, it is recommended that add_zero_length_segment is called after this method to ensure
+    the proper structure of the semantic and geometric definitions of the alignment
+
+    :param alignment: The alignment to create the representation.
+    """
+    expected_type = "IfcAlignment"
+    if not alignment.is_a(expected_type):
+        raise TypeError(f"Expected to see type '{expected_type}', instead received '{alignment.is_a()}'.")
+
+    if alignment.Representation:
+        return
+
+    _create_geometric_representation(file, alignment)
+
+    layouts = ifcopenshell.api.alignment.get_alignment_layouts(alignment)
+    for layout in layouts:
+        curve = ifcopenshell.api.alignment.get_layout_curve(layout)
+        layout_nest = ifcopenshell.api.alignment.get_alignment_segment_nest(layout)
+        for segment in layout_nest.RelatedObjects:
+            _add_segment_to_curve(file, segment, curve)