67 lines
2.6 KiB
Python
67 lines
2.6 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.api.sequence
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import ifcopenshell.util.element
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def unassign_sequence(
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file: ifcopenshell.file,
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relating_process: ifcopenshell.entity_instance,
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related_process: ifcopenshell.entity_instance,
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) -> None:
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"""Removes a sequence relationship between tasks
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:param relating_process: The previous / predecessor task.
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:param related_process: The next / successor task.
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:return: None
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Example:
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.. code:: python
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# Let's imagine we are creating a construction schedule. All tasks
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# need to be part of a work schedule.
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schedule = ifcopenshell.api.sequence.add_work_schedule(model, name="Construction Schedule A")
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# Let's imagine a root construction task
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construction = ifcopenshell.api.sequence.add_task(model,
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work_schedule=schedule, name="Construction", identification="C")
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# Let's imagine we're building 2 zones, one after another.
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zone1 = ifcopenshell.api.sequence.add_task(model,
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parent_task=construction, name="Zone 1", identification="C.1")
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zone2 = ifcopenshell.api.sequence.add_task(model,
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parent_task=construction, name="Zone 2", identification="C.2")
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# Zone 1 finishes, then zone 2 starts.
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ifcopenshell.api.sequence.assign_sequence(model, relating_process=zone1, related_process=zone2)
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# Let's make them unrelated
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ifcopenshell.api.sequence.unassign_sequence(model,
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relating_process=zone1, related_process=zone2)
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"""
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for rel in related_process.IsSuccessorFrom or []:
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if rel.RelatingProcess == relating_process:
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history = rel.OwnerHistory
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file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(file, history)
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ifcopenshell.api.sequence.cascade_schedule(file, task=related_process)
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