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Dion Moult
77 lines
3.2 KiB
Python
77 lines
3.2 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.util.element
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class Usecase:
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def __init__(self, file, material=None):
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"""Removes a material
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If the material is used in a material set, the corresponding layer,
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profile, or constituent is also removed. Note that this may result in a
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material set with zero items in it, which is invalid, so the user must
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take care of this situation themselves.
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:param material: The IfcMaterial entity you want to remove
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:type material: ifcopenshell.entity_instance.entity_instance
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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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# Create a material
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aluminium = ifcopenshell.api.run("material.add_material", model, name="AL01", category="aluminium")
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# ... and remove it
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ifcopenshell.api.run("material.remove_material", model, material=aluminium)
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"""
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self.file = file
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self.settings = {"material": material}
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def execute(self):
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inverse_elements = self.file.get_inverse(self.settings["material"])
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self.file.remove(self.settings["material"])
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# TODO: Right now, we we choose only to delete set items (e.g. a layer) but not the material set
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# This can lead to invalid material sets, but we assume the user will deal with it
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for inverse in inverse_elements:
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if inverse.is_a("IfcMaterialConstituent"):
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self.file.remove(inverse)
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elif inverse.is_a("IfcMaterialLayer"):
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self.file.remove(inverse)
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elif inverse.is_a("IfcMaterialProfile"):
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self.file.remove(inverse)
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elif inverse.is_a("IfcRelAssociatesMaterial"):
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history = inverse.OwnerHistory
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self.file.remove(inverse)
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if history:
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ifcopenshell.util.element.remove_deep2(self.file, history)
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elif inverse.is_a("IfcMaterialProperties"):
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for prop in inverse.Properties or []:
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self.file.remove(prop)
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self.file.remove(inverse)
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elif inverse.is_a("IfcMaterialDefinitionRepresentation"):
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for representation in inverse.Representations:
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for item in representation.Items:
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self.file.remove(item)
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self.file.remove(representation)
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self.file.remove(inverse)
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