63 lines
2.5 KiB
Python
63 lines
2.5 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.api.sequence
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def unassign_lag_time(file: ifcopenshell.file, rel_sequence: ifcopenshell.entity_instance) -> None:
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"""Removes any lag time in a sequence
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The schedule is cascaded afterwards.
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:param rel_sequence: The sequence to remove the lag time from.
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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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sequence = ifcopenshell.api.sequence.assign_sequence(model,
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relating_process=zone1, related_process=zone2)
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# What if you had to wait 1 week before you could start zone 2?
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ifcopenshell.api.sequence.assign_lag_time(model, rel_sequence=sequence, lag_value="P1W")
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# What if you didn't?
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ifcopenshell.api.sequence.unassign_lag_time(model, rel_sequence=sequence)
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"""
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if file.get_total_inverses(current_lag_time := rel_sequence.TimeLag) == 1:
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file.remove(current_lag_time)
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else:
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rel_sequence.TimeLag = None
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ifcopenshell.api.sequence.cascade_schedule(file, task=rel_sequence.RelatedProcess)
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