Program sfunif2 | Generate 2-D layered velocity model from specified interfaces. 
[SYNOPSIS]
sfunif2 < surface.rsf > model.rsf x0= z0= v00= dvdx= dvdz= n1= d1= o1=0. label1= unit1=
[COMMENTS]

In each layer, velocity is a linear function of position.

Inspired by SU's unif2.

October 2013 program of the month:
http://ahay.org/blog/2013/10/03/program-of-the-month-sfunif2/

[PARAMETERS]
float   | d1 | = |   | 	Sampling of the depth axis 
floats  | dvdx | = |   | 	 [ninf]
floats  | dvdz | = |   | 	 [ninf]
string  | label1 | = |   | 	depth axis label 
int     | n1 | = |   | 	Number of samples on the depth axis 
float   | o1 | =0. |   | 	Origin of the depth axis 
string  | unit1 | = |   | 	
floats  | v00 | = |   | 	 [ninf]
floats  | x0 | = |   | 	 [ninf]
floats  | z0 | = |   | 	 [ninf]
[DIRECTORY]
system/generic
