Simulation Player
Version 1.6
by Patrick McNeill

To Do List
----------

(1) Get "Agent View" to work.  This is fairly complicated procedure because
it involves determining the agent's velocity vector (to get the direction to
point the camera) and to position the camera to provide a realistic view.  I
have implemented the beginnings of this (Agent View can be activated and it
tries to move the camera (but fails)).  The 'u' key will switch between 
Agent and regular viewing modes.

(2) Modify the sightlines handling to allow either XYZ coordinate pairs or the
object pair format.

(3) Complete the optimization of the terrain.  It doesn't get the entire
terrain yet, and doesn't draw at all.  I hope to fix this soon, but I have
no idea how much longer it will take.  Note: This does not effect normal
drawing of the terrain.  Optimization must be explicitly turned on using the
'-o' option.
