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
+import ifcopenshell.api.owner
+import ifcopenshell.util.element
+
+
+def unassign_control(
+    file: ifcopenshell.file,
+    relating_control: ifcopenshell.entity_instance,
+    related_objects: list[ifcopenshell.entity_instance],
+) -> None:
+    """Unassigns a planning control or constraint to an object
+
+    :param relating_control: The IfcControl entity that is creating the
+        control or constraint
+    :param related_objects: The list IfcObjectDefinitions that is being controlled
+    :return: None
+
+    Example:
+
+    .. code:: python
+
+        # Let's relate a cost item and a product
+        wall = ifcopenshell.api.root.create_entity(model, ifc_class="IfcWall")
+        schedule = ifcopenshell.api.cost.add_cost_schedule(model)
+        cost_item = ifcopenshell.api.cost.add_cost_item(model,
+            cost_schedule=schedule)
+        ifcopenshell.api.control.assign_control(model,
+            relating_control=cost_item, related_objects=[wall])
+
+        # And now let's change our mind
+        ifcopenshell.api.control.unassign_control(model,
+            relating_control=cost_item, related_objects=[wall])
+    """
+    related_objects_set = set(related_objects)
+    control_assignments = set(relating_control.Controls)
+    rels = set(rel for obj in related_objects_set for rel in obj.HasAssignments if rel in control_assignments)
+
+    for rel in rels:
+        related_objects_new = set(rel.RelatedObjects) - related_objects_set
+        if related_objects_new:
+            rel.RelatedObjects = list(related_objects_new)
+            ifcopenshell.api.owner.update_owner_history(file, element=rel)
+        else:
+            history = rel.OwnerHistory
+            file.remove(rel)
+            if history:
+                ifcopenshell.util.element.remove_deep2(file, history)