||This class extends the functionality of the Node class to provide some more
functions that make working with the attractor easier.
||This class collects static methods that are used in several sketches of the
||Basic class for calculating and drawing a mesh.
||The node class supplies a basic object for physical simulations.
||Elasic connection between two nodes.
||This class extends the PenListener class of the JPen library by adding getter methods
to retrieve the pen values (position, pressure, tilt, pressed buttons, etc.).