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Dion Moult
123 lines
4.8 KiB
Python
123 lines
4.8 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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import ifcopenshell
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import ifcopenshell.api
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class Usecase:
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def __init__(self, file, **settings):
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self.file = file
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self.settings = {
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"port1": None,
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"port2": None,
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"direction": "NOTDEFINED",
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"element": None,
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}
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for key, value in settings.items():
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self.settings[key] = value
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def execute(self):
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# Note: there are a number of ambiguities with port connectivity. We
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# assume system topology is represented by a directed graph. In other
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# words, SOURCEANDSINK and NOTDEFINED implies a two way connection, with
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# two IfcRelConnectsPorts. SOURCE or SINK by itself implies a one way
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# connection. NOTDEFINED semantically implies that although you may
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# traverse the graph either direction, the direction has not been
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# determined yet by the engineer. None is not allowed as a direction as
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# we assume None means that no connection is made.
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if self.settings["port1"] == self.settings["port2"]:
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return
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self.purge_existing_connections_to_other_ports()
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if self.settings["direction"] == "SOURCE":
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self.settings["port1"].FlowDirection = "SOURCE"
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self.settings["port2"].FlowDirection = "SINK"
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elif self.settings["direction"] == "SINK":
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self.settings["port1"].FlowDirection = "SINK"
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self.settings["port2"].FlowDirection = "SOURCE"
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else:
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self.settings["port1"].FlowDirection = self.settings["direction"]
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self.settings["port2"].FlowDirection = self.settings["direction"]
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if self.settings["direction"] in ["SOURCE", "SOURCEANDSINK", "NOTDEFINED"]:
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self.set_connected_to()
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else:
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self.purge_connected_to()
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if self.settings["direction"] in ["SINK", "SOURCEANDSINK", "NOTDEFINED"]:
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self.set_connected_from()
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else:
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self.purge_connected_from()
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self.set_realising_element()
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def purge_existing_connections_to_other_ports(self):
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for rel in self.settings["port1"].ConnectedTo or []:
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if rel.RelatedPort != self.settings["port2"]:
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self.file.remove(rel)
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for rel in self.settings["port1"].ConnectedFrom or []:
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if rel.RelatingPort != self.settings["port2"]:
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self.file.remove(rel)
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for rel in self.settings["port2"].ConnectedTo or []:
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if rel.RelatedPort != self.settings["port1"]:
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self.file.remove(rel)
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for rel in self.settings["port2"].ConnectedFrom or []:
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if rel.RelatingPort != self.settings["port1"]:
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self.file.remove(rel)
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def set_connected_to(self):
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if self.settings["port1"].ConnectedTo:
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return
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self.file.create_entity(
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"IfcRelConnectsPorts",
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GlobalId=ifcopenshell.guid.new(),
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OwnerHistory=ifcopenshell.api.run("owner.create_owner_history", self.file),
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RelatingPort=self.settings["port1"],
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RelatedPort=self.settings["port2"],
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)
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def set_connected_from(self):
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if self.settings["port1"].ConnectedFrom:
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return
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self.file.create_entity(
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"IfcRelConnectsPorts",
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GlobalId=ifcopenshell.guid.new(),
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OwnerHistory=ifcopenshell.api.run("owner.create_owner_history", self.file),
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RelatingPort=self.settings["port2"],
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RelatedPort=self.settings["port1"],
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)
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def purge_connected_to(self):
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for rel in self.settings["port1"].ConnectedTo or []:
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self.file.remove(rel)
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def purge_connected_from(self):
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for rel in self.settings["port1"].ConnectedFrom or []:
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self.file.remove(rel)
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def set_realising_element(self):
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for rel in self.settings["port1"].ConnectedTo or []:
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rel.RealizingElement = self.settings["element"]
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for rel in self.settings["port1"].ConnectedFrom or []:
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rel.RealizingElement = self.settings["element"]
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