mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-09 17:31:45 +00:00
Andrej730
83 lines
3.5 KiB
Python
83 lines
3.5 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.util.element
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class Usecase:
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def __init__(self, file, **settings):
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"""Remove a representation.
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Also purges representation items and their related elements
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like IfcStyledItem, tessellated facesets colours and UV map.
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:param representation: IfcRepresentation to remove.
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Note that it's expected that IfcRepresentation won't be in use
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before calling this method (in such elements as IfcProductRepresentation, IfcShapeAspect)
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otherwise representation won't be removed.
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:type representation: ifcopenshell.entity_instance
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:return: None
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:rtype: None
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"""
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self.file = file
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self.settings = {"representation": None}
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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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styled_items = set()
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presentation_layer_assignments = set()
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textures = set()
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colours = set()
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for subelement in self.file.traverse(self.settings["representation"]):
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if subelement.is_a("IfcRepresentationItem"):
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[styled_items.add(s) for s in subelement.StyledByItem or []]
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# IFC2X3 is using LayerAssignments
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for s in (
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subelement.LayerAssignment
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if hasattr(subelement, "LayerAssignment")
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else subelement.LayerAssignments
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):
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presentation_layer_assignments.add(s)
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# IfcTessellatedFaceSet inverses
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[textures.add(t) for t in getattr(subelement, "HasTextures", []) or []]
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[colours.add(t) for t in getattr(subelement, "HasColours", []) or []]
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elif subelement.is_a("IfcRepresentation"):
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for layer in subelement.LayerAssignments:
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presentation_layer_assignments.add(layer)
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ifcopenshell.util.element.remove_deep2(
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self.file,
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self.settings["representation"],
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also_consider=list(styled_items | presentation_layer_assignments | colours),
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do_not_delete=self.file.by_type("IfcGeometricRepresentationContext"),
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)
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for texture in textures:
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ifcopenshell.util.element.remove_deep2(self.file, texture)
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for colour in colours:
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ifcopenshell.util.element.remove_deep2(self.file, colour)
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to_delete = getattr(self.file, "to_delete", ())
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for element in styled_items:
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if not element.Item or element.Item in to_delete:
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self.file.remove(element)
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for element in presentation_layer_assignments:
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if all(item in to_delete for item in element.AssignedItems):
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self.file.remove(element)
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