First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2022 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.util.element
+
+
+def remove_boolean(file: ifcopenshell.file, item: ifcopenshell.entity_instance) -> None:
+    """Removes a boolean operation without deleting the operands
+
+    The first operand will replace the boolean result itself, and the second
+    operand will be reset as a top level representation item.
+
+    This may affect the Items of IfcShapeRepresentation, so it is recommended
+    to run :func:`ifcopenshell.api.geometry.validate_type` after all boolean
+    modifications are complete.
+
+    :param item: This may either be an IfcBooleanResult or an
+        IfcRepresentationItem that is participating in one or more boolean
+        results (in which case all are removed).
+    """
+    if not item.is_a("IfcBooleanResult"):
+        for inverse in file.get_inverse(item):
+            if inverse.is_a("IfcBooleanResult"):
+                remove_boolean(file, inverse)
+        return
+
+    representations = []
+    queue = list(file.get_inverse(item))
+    while queue:
+        inverse = queue.pop()
+        if inverse.is_a("IfcShapeRepresentation"):
+            representations.append(inverse)
+        elif inverse.is_a("IfcBooleanResult"):
+            queue.extend(file.get_inverse(inverse))
+        elif inverse.is_a("IfcCsgSolid"):
+            queue.extend(file.get_inverse(inverse))
+
+    first = item.FirstOperand
+    second = item.SecondOperand
+    for inverse in file.get_inverse(item):
+        ifcopenshell.util.element.replace_attribute(inverse, item, first)
+
+    for representation in set(representations):
+        representation.Items = list(representation.Items) + [second]
+
+    file.remove(item)