Extensions

VLE provides several vle::devs::Dynamics subclass to simplify the development of atomic models. These sub-classes provides behavior like: finite state automaton, ordinary differential equation solver, Petrinet, planning and decision making etc. Some extensions also provide graphical interfaces and C ++ code generators.

Extensions available

• vle.output provides output plug-ins. These plugins are in charge of recording the outputs of simulations in files (using a csv, a R data or gnuplot format). This package is a dependency of several extensions.
• vle.extension.fsa provides a vle::devs::dynamics subclass to develop easily finite state automaton with a specific C++ syntax or be using a graphical interface and C++ generator.
• vle.extension.differential-equation provides vle::devs::dynamics generic classes to develop DEVS models that wrap ordinary differential equation using QSS, Runge kutta or Euler solver.
• vle.extension.petrinet provides a vle::devs::dynamics subclass to develop easily high level Petrinet with a specific C++ syntax or be using a graphical interface and C++ generator.
• vle.extension.celldevs provides a vle::devs::dynamics subclass to develop cellular automaton. Using this extension with an executive (to dynamically change structure of the model) create a high level modeling system.
• vle.extension.decision a vle::devs::dynamics class to develop planning system.
• vle.extension.difference-equation provides C++ vle::devs::dynamics generic classes to develop models that compute the value of one or more real variables in t depends on itself at t-1, t-2, … and according to other real variables at t, t-1, t-2, … We called it the difference equations but this extension is more general because only the above property is respected.
• vle.forrester a graphical user interface to develop model using the Forrester formalism.

Installation

First, download the packages repository from zip file or Git repository and use the command line to build and install the packages. For example for VLE 1.1:

cd $HOME
mkdir vle-extension-sources
cd vle-extension-sources
wget http://www.vle-project.org/pub/vle/1.1/1.1.2/packages-1.1.2.zip
unzip packages-1.1.2.zip
cd packages-1.1.2
vle-1.1 -P vle.output configure build
vle-1.1 -P vle.extension.fsa configure build
vle-1.1 -P vle.extension.difference-equation fsa configure build
vle-1.1 -P vle.extension.differential-equation configure build
vle-1.1 -P vle.extension.petrinet configure build
vle-1.1 -P vle.extension.celldevs configure build
vle-1.1 -P vle.extension.decision configure build
vle-1.1 -P vle.forrester configure build