76 lines
3.0 KiB
Python
76 lines
3.0 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
|
|
# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
|
|
#
|
|
# This file is part of IfcOpenShell.
|
|
#
|
|
# IfcOpenShell is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# IfcOpenShell is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public License
|
|
# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import ifcopenshell
|
|
import ifcopenshell.util.element
|
|
|
|
|
|
def remove_material(file: ifcopenshell.file, material: ifcopenshell.entity_instance) -> None:
|
|
"""Removes a material
|
|
|
|
If the material is used in a material set, the corresponding layer,
|
|
profile, or constituent is also removed. Note that this may result in a
|
|
material set with zero items in it, which is invalid, so the user must
|
|
take care of this situation themselves.
|
|
|
|
:param material: The IfcMaterial entity you want to remove
|
|
:return: None
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
# Create a material
|
|
aluminium = ifcopenshell.api.material.add_material(model, name="AL01", category="aluminium")
|
|
|
|
# ... and remove it
|
|
ifcopenshell.api.material.remove_material(model, material=aluminium)
|
|
"""
|
|
inverse_elements = file.get_inverse(material)
|
|
file.remove(material)
|
|
# TODO: Right now, we we choose only to delete set items (e.g. a layer) but not the material set
|
|
# This can lead to invalid material sets, but we assume the user will deal with it
|
|
for inverse in inverse_elements:
|
|
if inverse.is_a("IfcMaterialConstituent"):
|
|
file.remove(inverse)
|
|
elif inverse.is_a("IfcMaterialLayer"):
|
|
file.remove(inverse)
|
|
elif inverse.is_a("IfcMaterialProfile"):
|
|
file.remove(inverse)
|
|
elif inverse.is_a("IfcRelAssociatesMaterial"):
|
|
history = inverse.OwnerHistory
|
|
file.remove(inverse)
|
|
if history:
|
|
ifcopenshell.util.element.remove_deep2(file, history)
|
|
elif inverse.is_a("IfcMaterialProperties"):
|
|
if file.schema != "IFC2X3":
|
|
props = inverse.Properties
|
|
else:
|
|
# only IfcExtendedMaterialProperties have properties in IFC2X3
|
|
props = getattr(inverse, "ExtendedProperties", None)
|
|
props = props or []
|
|
for prop in props:
|
|
file.remove(prop)
|
|
file.remove(inverse)
|
|
elif inverse.is_a("IfcMaterialDefinitionRepresentation"):
|
|
for representation in inverse.Representations:
|
|
for item in representation.Items:
|
|
file.remove(item)
|
|
file.remove(representation)
|
|
file.remove(inverse)
|