Cactus Code Thorn WaveToy1DF77
Authors    : Gabrielle Allen
CVS info   : $Header$
--------------------------------------------------------------------------

Purpose of the thorn:

This thorn illustrates the solution of the scalar wave equation in 1D using
centered explicit finite differencing. Included are routines to

 * Set up and register the 1D spatial coordinate system
 * Calculate initial data
 * Evolve using a standard explicit method

The Cactus infrastructure used includes

 * Boundary conditions  (CactusBase/Boundary)
 * Timestep calculation (CactusBase/Time)
 * Parallel driver      (CactusPUGH/PUGH)
 * IO			(Standard IO thorns)