95 lines
3.8 KiB
Python
95 lines
3.8 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.material
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import ifcopenshell.util.element
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def remove_material_set(file: ifcopenshell.file, material: ifcopenshell.entity_instance) -> None:
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"""Removes a material set
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All set items, such as layers, profiles, or constituents will also be
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removed. All set usages are also removed.
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However, the materials and profile curves used by the layers,
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profiles and constituents will not be removed.
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:param material: The IfcMaterialLayerSet, IfcMaterialConstituentSet,
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IfcMaterialProfileSet entity you want to remove.
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:return: None
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Example:
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.. code:: python
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# Create a material set
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material_set = ifcopenshell.api.material.add_material_set(model,
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name="GYP-ST-GYP", set_type="IfcMaterialLayerSet")
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# Create some materials
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gypsum = ifcopenshell.api.material.add_material(model, name="PB01", category="gypsum")
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steel = ifcopenshell.api.material.add_material(model, name="ST01", category="steel")
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# Add some layers
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layer = ifcopenshell.api.material.add_layer(model, layer_set=material_set, material=gypsum)
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layer = ifcopenshell.api.material.add_layer(model, layer_set=material_set, material=steel)
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layer = ifcopenshell.api.material.add_layer(model, layer_set=material_set, material=gypsum)
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# Completely delete the set and all layers. The gypsum and steel
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# material still exist, though.
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ifcopenshell.api.material.remove_material_set(model, material=material_set)
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"""
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# Remove all usages for sets.
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has_usages = material.is_a("IfcMaterialLayerSet") or material.is_a("IfcMaterialProfileSet")
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if has_usages:
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# Usage is invalid if it is not associated with some element,
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# so we can remove usages through unassignment.
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elements = ifcopenshell.util.element.get_elements_by_material(file, material)
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if elements:
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ifcopenshell.api.material.unassign_material(file, products=list(elements))
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if material.is_a("IfcMaterialLayerSet"):
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set_items = material.MaterialLayers or []
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elif material.is_a("IfcMaterialProfileSet"):
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set_items = material.MaterialProfiles or []
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elif material.is_a("IfcMaterialConstituentSet"):
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set_items = material.MaterialConstituents or []
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elif material.is_a("IfcMaterialList"):
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set_items = []
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else:
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raise ValueError(f"Unknown material set type: {material.is_a()}")
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for set_item in set_items:
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file.remove(set_item)
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inverse_elements = file.get_inverse(material)
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file.remove(material)
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for inverse in inverse_elements:
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if inverse.is_a("IfcRelAssociatesMaterial"):
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# NOTE: for has_usages already handled by unassign_material.
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history = inverse.OwnerHistory
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file.remove(inverse)
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if history:
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ifcopenshell.util.element.remove_deep2(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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file.remove(prop)
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file.remove(inverse)
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