First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
4547 changed files with 1170384 additions and 0 deletions
@@ -0,0 +1,78 @@
+# 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.util.element
+
+
+def unassign_pset(
+    file: ifcopenshell.file,
+    products: list[ifcopenshell.entity_instance],
+    pset: ifcopenshell.entity_instance,
+) -> None:
+    """Unassign property set from the provided elements.
+
+    :param products: Elements (or element types) to assign the pset from.
+    :param pset: Property set.
+
+    Example:
+
+    .. code:: python
+
+        element1 = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
+        element2 = ifcopenshell.api.root.create_entity(self.file, ifc_class="IfcWall")
+        ifcopenshell.api.pset.assign_pset(self.file, [element1, element2], pset)
+
+        # Pset is now shared by 2 elements.
+        assert ifcopenshell.util.element.get_elements_by_pset(pset) == {element1, element2}
+
+        ifcopenshell.api.pset.unassign_pset(self.file, [element2], pset)
+        # Pset was unassigned from element2.
+        assert ifcopenshell.util.element.get_elements_by_pset(pset) == {element1}
+
+    """
+    is_ifc2x3 = file.schema == "IFC2X3"
+
+    products_occurrences: set[ifcopenshell.entity_instance] = set()
+    products_types: set[ifcopenshell.entity_instance] = set()
+    for product in products:
+        if product.is_a("IfcTypeProduct"):
+            products_types.add(product)
+        else:
+            products_occurrences.add(product)
+
+    # Check occurrences using pset.
+    if products_occurrences:
+        rels = pset.PropertyDefinitionOf if is_ifc2x3 else pset.DefinesOccurrence
+        for rel in rels:
+            objs = set(rel.RelatedObjects)
+            if not any(p in objs for p in products_occurrences):
+                continue
+            objs.difference_update(products_occurrences)
+            if objs:
+                rel.RelatedObjects = list(objs)
+            else:
+                history = rel.OwnerHistory
+                file.remove(rel)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(file, history)
+
+    for product in products_types:
+        psets = list(product.HasPropertySets)
+        psets.remove(pset)
+        product.HasPropertySets = psets or None