Constructor; initializes the transmitter with the specified ip and port;
Also tells the physics engine how fast the ball is pitched and how much
backspin is put on it.
class JFileFilter
A simple FileFilter class that works by filename extension, like
one in JDK demo called ExtentionFilter to be released in future
Swing.
runs the physics for the pitch and outputs the position, velocity, and orientation updates
to DIS espdus which are broadcast on the multicast port specified in the constructor.
Sets the appropriate values for the espdu and transmits it out the behaviorStreamBuffer
These values are oriented according to DIS-coordinates; thus, if you wish to transmit to
a VRML world, put 'up' into Y and 'right' into -Z (reverse sign).