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https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
103 lines
3.8 KiB
Python
103 lines
3.8 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 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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ASSIGNABLE_DICT = {
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"IfcZone": ("IfcZone", "IfcSpace", "IfcSpatialZone"),
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"IfcBuiltSystem": (
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"IfcBuiltElement",
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"IfcFurnishingElement",
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"IfcElementAssembly",
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"IfcTransportElement",
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),
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"IfcBuildingSystem": (
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"IfcBuildingElement",
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"IfcFurnishingElement",
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"IfcElementAssembly",
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"IfcTransportElement",
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),
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"IfcDistributionSystem": ("IfcDistributionElement",),
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"IfcStructuralAnalysisModel": ("IfcStructuralMember", "IfcStructuralConnection"),
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"IfcSystem": ("IfcProduct",),
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"IfcGroup": ("IfcObjectDefinition",),
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}
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def is_assignable(product, system) -> bool:
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for assignable in ASSIGNABLE_DICT.get(system.is_a(), ()):
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if product.is_a(assignable):
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return True
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return False
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class Usecase:
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def __init__(self, file, product=None, system=None):
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"""Assigns a distribution element to a system
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Note that it is not necessary to assign distribution ports to a system.
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:param product: The IfcDistributionElement to assign to the system.
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:type product: ifcopenshell.entity_instance.entity_instance
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:param system: The IfcSystem you want to assign the element to.
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:type system: ifcopenshell.entity_instance.entity_instance
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:return: The IfcRelAssignsToGroup relationship
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:rtype: ifcopenshell.entity_instance.entity_instance
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Example::
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# A completely empty distribution system
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system = ifcopenshell.api.run("system.add_system", model)
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# Create a duct
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duct = ifcopenshell.api.run("root.create_entity", model,
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ifc_class="IfcDuctSegment", predefined_type="RIGIDSEGMENT")
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# This duct is part of the system
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ifcopenshell.api.run("system.assign_system", model, product=duct, system=system)
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"""
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self.file = file
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self.settings = {
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"product": product,
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"system": system,
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}
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def execute(self):
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system = self.settings["system"]
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product = self.settings["product"]
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if not is_assignable(product, system):
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raise TypeError(f"You cannot assign an {product.is_a()} to an {system.is_a()}")
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if not self.settings["system"].IsGroupedBy:
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return self.file.create_entity(
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"IfcRelAssignsToGroup",
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**{
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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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"RelatedObjects": [self.settings["product"]],
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"RelatingGroup": self.settings["system"],
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},
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)
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rel = self.settings["system"].IsGroupedBy[0]
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related_objects = set(rel.RelatedObjects) or set()
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related_objects.add(self.settings["product"])
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rel.RelatedObjects = list(related_objects)
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ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": rel})
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