Program sfreg2tri | Decimate a regular grid to triplets for triangulation. 
[SYNOPSIS]
sfreg2tri < in.rsf > out.rsf edgeout=edge.rsf nt= zero=0.
[PARAMETERS]
string  | edgeout | = |   | 	auxiliary output file name
int     | nt | = |   | 	number of triplets 
float   | zero | =0. |   | 	level surface 
[DIRECTORY]
system/generic
