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