69 lines
2.7 KiB
Python
69 lines
2.7 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.api.aggregate
|
|
import ifcopenshell.api.root
|
|
import ifcopenshell.util.element
|
|
|
|
|
|
def remove_feature(file: ifcopenshell.file, feature: ifcopenshell.entity_instance) -> None:
|
|
"""Permanently delete a feature element and its void or projection relationship.
|
|
|
|
The feature entity (e.g. IfcOpeningElement) is removed from the model
|
|
along with its IfcRelVoidsElement or IfcRelProjectsElement relationship.
|
|
The host element (wall, slab, etc.) is unaffected. Any fillings (windows,
|
|
doors) that occupied the opening become orphaned and must be separately
|
|
deleted via root.remove_product.
|
|
|
|
:param feature: The IfcFeatureElement to remove.
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
# Create an orphaned opening. Note that an orphaned opening is
|
|
# invalid, as an opening can only exist when voiding another
|
|
# element.
|
|
feature = ifcopenshell.api.root.create_entity(model, ifc_class="IfcOpeningElement")
|
|
|
|
# Remove it. This brings us back to a valid model.
|
|
ifcopenshell.api.feature.remove_feature(model, feature=feature)
|
|
"""
|
|
if feature.is_a("IfcFeatureElementSubtraction"):
|
|
rels = feature.VoidsElements
|
|
elif feature.is_a("IfcFeatureElementAddition"):
|
|
rels = feature.ProjectsElements
|
|
elif feature.is_a("IfcSurfaceFeature"):
|
|
if file.schema == "IFC4":
|
|
ifcopenshell.api.aggregate.unassign_object(file, products=[feature])
|
|
rels = []
|
|
else:
|
|
rels = feature.ProjectsElements
|
|
for rel in rels:
|
|
history = rel.OwnerHistory
|
|
file.remove(rel)
|
|
if history:
|
|
ifcopenshell.util.element.remove_deep2(file, history)
|
|
if feature.is_a("IfcOpeningElement"):
|
|
for rel in feature.HasFillings:
|
|
history = rel.OwnerHistory
|
|
file.remove(rel)
|
|
if history:
|
|
ifcopenshell.util.element.remove_deep2(file, history)
|
|
ifcopenshell.api.root.remove_product(file, product=feature)
|