render2d
  Render a grid in 2 dimensions.
  
render3d
  Render a grid in 3 dimensions, optionally with separate coloration.
  
grid_info
  Read a grid and print basic info about it.
  
grid_diff
  Compute and write the difference between two grids.
  
grid_simp
  Compute and write a downsample simplification of a given grid.

/*------------------------------------------------------------------*/

  Bob PoFang Wei (c) 2009
  boabawhales@gmail.com

  Grid.h & Grid.c WERE MODIFIED SO THAT THEY CAN HANDLE float VALUES

/*--------------------------------------------------------------------*/