flow - Flow is an interactive program for displaying arcascii files,
       computing flow direction and accumulation on a grid          
 
run as: flow

Features: 
You can render terrain outline or filled and select between different color tables rainbow, grayscale, custom and flow accumulation (flow accumulation color scale changes the buckets sizes for a better view of flow accumulation). You can increase and decrease resolution.

Commandline options:
flow>flowdir <input_file> <output_file>
flow>flowaccu <input_file> <output_file>
flow>display <input_file> [input_color_file]
flow>info <input_file>


Menu options:
- availible on right mouse click
- you can render terrain outline or filled and select between different colors
- click fly through to toggle animation on and off
- if using custom coloring (default) you can select the different color of the buckets

Mouse options:
Drag the mouse to move terrain.

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 
d - move terrain down
l - move terrain left
r - move terrain right 
b - move back from the terrain
f - move towards terrain
up arrow - look up
down arrow - look down
right arrow - look right
left arrow - look left
t - pause glut window and start interactive prompt
q - quit
> - increase resolution
< - decrease resolution