All of the basic simulation infrastructure is provided for you. Specifically, we provide the discrete-time simulation tools, the constructs needed to communicate with other objects in the simulation, environmental actuators that will respond to your commands and standardized message definitions.
The codebase can be downloaded here
If you unpack the codebase, you will find the following files and
The simulator is composed of 5 main packages.
Detailed descriptions of each package can be found in the javadoc
api documentation, which can be built by running 'make' in the root of
the simulator release (not the code/ directory). The object simulator.framework.Elevator is the
top-level object that provides command line interface and instantiates
all other simulation objects.
All source code is provided (except for the control modules you
will be creating later in the semester).
You should not need to modify the simulation framework code in the
normal course of completing your assignments. It is primarily to
you understand how the simulated elevator works (and to help with
debugging). If you wish to modify the framework to make your life
easier, you can do so, but be careful not to break anything! Keep
mind that you will only submit your controller code, so any
modifications you make to your local copy of the framework will not be
present when we run tests on your project submissions.
If you come up with useful a useful modification to the framework
(for example, a modification that makes testing easier), you may submit
the code to TAs for eventual inclusion in the official codebase.
Decisions on whether to include your modification (or when to release
the new version) will be at the sole discretion of the course staff,
and you will still be responsible for making sure the code and test
files submitted for each project work with the current official release.
Please see the Example section of this document for more details and an example on how everything fits together.
order to run the simulation, first make sure that you are running an
appropriate version of Java on an appropriate machine. We recommend
using the ece cluster (ece000.ece.cmu.edu) or the color machines. Accounts should be created for
enrolled student by the end of the third week of class.
Please note that, per department
policy, you may not run simulations on the head machines of each
cluster: asl (games/linux cluster),
vonneumann(deadmathematicians), ece000 (ece cluster) and black (color cluster)
To connect to the ece cluster, ssh
of the other machines in the cluster when you log in.
Note that some of these
machines have an IP on the local cmu network (e.g. ece009.campus.ece.cmu.local), so they are not reachable
from off-campus. If you
are off-campus, you must first ssh to a publicly accessibly machine
of the color
cluster machines or ece000.ece.cmu.edu through ece008.ece.cmu.edu).
To ssh from a
windows machine, you should use
or another terminal program. You should also run a Windows X
client, as described in the Project FAQ.
For more information on accessing the clusters from on and off campus please see the ece wiki located here
your benefit and the benefit of others, please spread the load around
on various machines. You can use the 'top' command to see what other
programs are running on each machine. A complete list of the machines
in the cluster is shown when you first log in.
The required version of java is whatever is being run on the
cluster. You can check what version of Java is installed by
java -versionOnce you have downloaded the code to your home directory, you can extract it using this command (change the filenames as appropriate):
tar -xzvf .tar.gzOr
tar xvf .tar.gzDepending on your version of tar.
The makefile provided will compile all java files. You can execute
it by running
from the 'code' directory.
To execute the java compiler directly, use:
You will need to recompile each file after you modify it. Running "make" does this automatically.
You can run the simulator from the code directory by executing:
If you wish to run the simulator from another directory, then add
the "-cp /path/to/code" flag to the java command line, or set the
CLASSPATH variable using:
(note the backticks used around pwd). If you wish to have your
CLASSPATH set every time, you can add the line above to your .bashrc
file (assuming you are using the BASH shell).
Running tests will produce files with the extension .stats that
contain statistics regarding the
performance of your elevator, including assertions passed and failed
for unit and integration tests and detailed information on
passenger delivery, monitoring, and network usage for acceptance tests.
If you run the simulator with the
-gui option, you
must make sure that you have are running an X window manager and that
you have X11 forwarding enabled in your ssh client. Also note that
running the simulator on an on-campus host while trying to view the GUI
from an off-campus host over SSH or X-Win 32 will be very slow. You
will get more satisfactory results from the GUI if you run the
simulator on a local machine.