mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-10 17:58:20 +00:00
Andrej730
120 lines
4.9 KiB
Python
120 lines
4.9 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.api
|
|
import ifcopenshell.guid
|
|
|
|
|
|
def assign_process(file, relating_process=None, related_object=None) -> None:
|
|
"""Assigns an object to be related to a process, typically a construction task
|
|
|
|
Processes work using the ICOM (Input, Controls, Outputs, Mechanisms)
|
|
paradigm in IFC. This process model is commonly used in modeling
|
|
manufacturing functions.
|
|
|
|
For example, processes (such as tasks) consume Inputs and transform them
|
|
into Outputs. The process may only occur within the limits of Controls
|
|
(e.g. cost items) and may require Mechanisms (ISO9000 calls them
|
|
Mechanisms, whereas IFC calls them resources, such as raw materials,
|
|
labour, or equipment).
|
|
|
|
+----------+
|
|
| Controls |
|
|
+----------+
|
|
|
|
|
V
|
|
+--------+ +---------+ +---------+
|
|
| Inputs | --> | Process | --> | Outputs |
|
|
+--------+ +---------+ +---------+
|
|
^
|
|
|
|
|
+-----------+
|
|
| Resources |
|
|
+-----------+
|
|
|
|
There are three main scenarios where an object may be related to a
|
|
task: defining inputs, controls, and resources of a process.
|
|
|
|
For inputs, a product (i.e. wall) may be defined as an input to a task,
|
|
such as when the task is to demolish the wall (i.e. the wall is an
|
|
input, and there is no output).
|
|
|
|
For controls, a cost item may be defined as a control to a task.
|
|
|
|
For resources, any construction resource may be assigned to a task.
|
|
|
|
:param relating_process: The IfcProcess (typically IfcTask) that the
|
|
input, control, or resource is related to.
|
|
:type relating_process: ifcopenshell.entity_instance
|
|
:param related_object: The IfcProduct (for input), IfcCostItem (for
|
|
control) or IfcConstructionResource (for resource).
|
|
:type related_object: ifcopenshell.entity_instance
|
|
:return: The newly created IfcRelAssignsToProcess relationship
|
|
:rtype: ifcopenshell.entity_instance
|
|
|
|
Example:
|
|
|
|
.. code:: python
|
|
|
|
# Let's imagine we are creating a construction schedule. All tasks
|
|
# need to be part of a work schedule.
|
|
schedule = ifcopenshell.api.run("sequence.add_work_schedule", model, name="Construction Schedule A")
|
|
|
|
# Let's create a construction task. Note that the predefined type is
|
|
# important to distinguish types of tasks.
|
|
task = ifcopenshell.api.run("sequence.add_task", model,
|
|
work_schedule=schedule, name="Demolish existing", identification="A", predefined_type="DEMOLITION")
|
|
|
|
# Let's say we have a wall somewhere.
|
|
wall = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcWall")
|
|
|
|
# Let's demolish that wall!
|
|
ifcopenshell.api.run("sequence.assign_process", model, relating_process=task, related_object=wall)
|
|
"""
|
|
settings = {
|
|
"relating_process": relating_process,
|
|
"related_object": related_object,
|
|
}
|
|
|
|
if settings["related_object"].HasAssignments:
|
|
for assignment in settings["related_object"].HasAssignments:
|
|
if assignment.is_a("IfcRelAssignsToProcess") and assignment.RelatingProcess == settings["relating_process"]:
|
|
return
|
|
|
|
operates_on = None
|
|
if settings["relating_process"].OperatesOn:
|
|
operates_on = settings["relating_process"].OperatesOn[0]
|
|
|
|
if operates_on:
|
|
related_objects = list(operates_on.RelatedObjects)
|
|
related_objects.append(settings["related_object"])
|
|
operates_on.RelatedObjects = related_objects
|
|
ifcopenshell.api.run("owner.update_owner_history", file, **{"element": operates_on})
|
|
else:
|
|
operates_on = file.create_entity(
|
|
"IfcRelAssignsToProcess",
|
|
**{
|
|
"GlobalId": ifcopenshell.guid.new(),
|
|
"OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", file),
|
|
"RelatedObjects": [settings["related_object"]],
|
|
"RelatingProcess": settings["relating_process"],
|
|
}
|
|
)
|
|
return operates_on
|