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
+import ifcopenshell.util.element
+
+
+def disconnect_port(file: ifcopenshell.file, port: ifcopenshell.entity_instance) -> None:
+    """Disconnects a port from any other port
+
+    A port may only be connected to one other port, so the other port is not
+    needed to be specified.
+
+    :param port: The IfcDistributionPort to disconnect.
+    :return: None
+
+    Example:
+
+    .. code:: python
+
+        # A completely empty distribution system
+        system = ifcopenshell.api.system.add_system(model)
+
+        # Create a duct and a 90 degree bend fitting
+        duct = ifcopenshell.api.root.create_entity(model,
+            ifc_class="IfcDuctSegment", predefined_type="RIGIDSEGMENT")
+        fitting = ifcopenshell.api.root.create_entity(model,
+            ifc_class="IfcDuctFitting", predefined_type="BEND")
+
+        # The duct and fitting is part of the system
+        ifcopenshell.api.system.assign_system(model, products=[duct], system=system)
+        ifcopenshell.api.system.assign_system(model, products=[fitting], system=system)
+
+        # Create 2 ports, one for either end of both the duct and fitting.
+        duct_port1 = ifcopenshell.api.system.add_port(model, element=duct)
+        duct_port2 = ifcopenshell.api.system.add_port(model, element=duct)
+        fitting_port1 = ifcopenshell.api.system.add_port(model, element=fitting)
+        fitting_port2 = ifcopenshell.api.system.add_port(model, element=fitting)
+
+        # Connect the duct and fitting together. At this point, we have not
+        # yet determined the direction of the flow, so we leave direction as
+        # NOTDEFINED.
+        ifcopenshell.api.system.connect_port(model, port1=duct_port2, port2=fitting_port1)
+
+        # Disconnect the port. note we could've equally disconnected
+        # fitting_port1 instead of duct_port2
+        ifcopenshell.api.system.disconnect_port(model, port=duct_port2)
+    """
+    rels = port.ConnectedTo or ()
+    rels += port.ConnectedFrom or ()
+
+    for rel in rels:
+        rel.RelatingPort.FlowDirection = None
+        rel.RelatedPort.FlowDirection = None
+        history = rel.OwnerHistory
+        file.remove(rel)
+        if history:
+            ifcopenshell.util.element.remove_deep2(file, history)