mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-10 01:41:57 +00:00
Andrej730
85 lines
4.2 KiB
Python
85 lines
4.2 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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import ifcopenshell.util.element
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class Usecase:
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def __init__(self, file, product=None, relating_structure=None):
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"""Dereferences the a product and space
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:param product: The physical IfcElement that exists in the space.
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:type product: ifcopenshell.entity_instance.entity_instance
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:param relating_structure: The IfcSpatialStructureElement element, such
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as IfcBuilding, IfcBuildingStorey, or IfcSpace that the element
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exists in.
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:return: None
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:rtype: None
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Example:
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.. code:: python
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project = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcProject")
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site = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcSite")
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building = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuilding")
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storey1 = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuildingStorey")
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storey2 = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuildingStorey")
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storey3 = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcBuildingStorey")
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# The project contains a site (note that project aggregation is a special case in IFC)
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ifcopenshell.api.run("aggregate.assign_object", model, products=[site], relating_object=project)
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# The site has a building, the building has a storey, and the storey has a space
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ifcopenshell.api.run("aggregate.assign_object", model, products=[building], relating_object=site)
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ifcopenshell.api.run("aggregate.assign_object", model, products=[storey], relating_object=building)
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ifcopenshell.api.run("aggregate.assign_object", model, products=[space], relating_object=storey)
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# Create a column, this column spans 3 storeys
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column = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcWall")
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# The column is contained in the lowermost storey
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ifcopenshell.api.run("spatial.assign_container", model, products=[column], relating_structure=storey1)
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# And referenced in the others
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ifcopenshell.api.run("spatial.reference_structure", model, product=column, relating_structure=storey2)
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ifcopenshell.api.run("spatial.reference_structure", model, product=column, relating_structure=storey3)
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# Actually, it only goes up to storey 2.
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ifcopenshell.api.run("spatial.dereference_structure", model, product=column, relating_structure=storey3)
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"""
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self.file = file
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self.settings = {"product": product, "relating_structure": relating_structure}
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def execute(self):
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for rel in self.settings["product"].ReferencedInStructures:
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if rel.RelatingStructure != self.settings["relating_structure"]:
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continue
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related_elements = list(rel.RelatedElements)
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related_elements.remove(self.settings["product"])
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if related_elements:
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rel.RelatedElements = related_elements
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ifcopenshell.api.run("owner.update_owner_history", self.file, **{"element": rel})
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else:
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history = rel.OwnerHistory
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self.file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(self.file, history)
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