First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.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
+
+
+def add_metric_reference(
+    file: ifcopenshell.file, metric: ifcopenshell.entity_instance, reference_path: str
+) -> list[ifcopenshell.entity_instance]:
+    """
+    Adds a chain of references to a metric. The reference path is a string of the form "attribute.attribute.attribute"
+    Used to reference a value of an attribute of an instance through a metric objective entity.
+    """
+    references_created = []
+    if reference_path:
+        attributes = reference_path.split(".")
+        for i in range(len(attributes)):
+            if i == 0:
+                reference = file.create_entity("IfcReference")
+                reference.AttributeIdentifier = attributes[i]
+                metric.ReferencePath = reference
+                references_created.append(reference)
+            else:
+                reference = file.create_entity("IfcReference")
+                reference.AttributeIdentifier = attributes[i]
+                references_created[i - 1].InnerReference = reference
+                references_created.append(reference)
+    return references_created