75 lines
3 KiB
Python
75 lines
3 KiB
Python
# Copyright 2014 Modelling, Simulation and Design Lab (MSDL) at
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# McGill University and the University of Antwerp (http://msdl.cs.mcgill.ca/)
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Import code for model simulation:
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from pypdevs.simulator import Simulator
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# Import the model to be simulated
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from model import TrafficSystem
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# ======================================================================
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# 1. Instantiate the (Coupled or Atomic) DEVS at the root of the
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# hierarchical model. This effectively instantiates the whole model
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# thanks to the recursion in the DEVS model constructors (__init__).
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#
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trafficSystem = TrafficSystem(name="trafficSystem")
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# ======================================================================
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# 2. Link the model to a DEVS Simulator:
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# i.e., create an instance of the 'Simulator' class,
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# using the model as a parameter.
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sim = Simulator(trafficSystem)
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# ======================================================================
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# 3. Perform all necessary configurations, the most commonly used are:
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# A. Termination time (or termination condition)
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# Using a termination condition will execute a provided function at
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# every simulation step, making it possible to check for certain states
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# being reached.
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# It should return True to stop simulation, or Falso to continue.
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def terminate_whenStateIsReached(clock, model):
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return model.trafficLight.state.get() == "manual"
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sim.setTerminationCondition(terminate_whenStateIsReached)
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# A termination time is prefered over a termination condition,
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# as it is much simpler to use.
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# e.g. to simulate until simulation time 400.0 is reached
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sim.setTerminationTime(400.0)
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# B. Set the use of a tracer to show what happened during the simulation run
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# Both writing to stdout or file is possible:
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# pass None for stdout, or a filename for writing to that file
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sim.setVerbose(None)
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# C. Use Classic DEVS instead of Parallel DEVS
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# If your model uses Classic DEVS, this configuration MUST be set as
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# otherwise errors are guaranteed to happen.
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# Without this option, events will be remapped and the select function
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# will never be called.
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sim.setClassicDEVS()
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# ======================================================================
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# 4. Simulate the model
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sim.simulate()
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# ======================================================================
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# 5. (optional) Extract data from the simulated model
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print("Simulation terminated with traffic light in state %s" % (trafficSystem.trafficLight.state.get()))
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