visualize3D - given a gird in arcascii format, this program will display
              the terrain in 3D using OpenGL                              
 
run as: visualize3D <grid name>

Features: 
You can render terrain outline of filled and select between different color tables (rainbo and black&white). You can increase and decrease resolution.

Menu options:
- availible on right mouse click
- you can render terrain outline or filled and select between different colors

Mouse options:
Drag the mouse to control your head position.

Keyboard options:
x & X - rotate around the x axis
y & Y - rotate around the y axis
z & Z - rotate around the z axis
u - move terrain up (look down)
d - move terrain down (look up)
l - move terrain left (look right)
r - move terrain right (look left)
b - move back from the terrain
f - move towards terrain
q - quit
> - increase resolution
< - decrease resolution