Synopsis
		sfint3d < Fw.rsf > Ft.rsf verb=n pick=2 fill=1 nz=100 oz=0. dz=1. nx=100 ox=0. dx=1. ny=1 oy=0. dy=1.

* 3-D traveltime interpolation (from rays to Cartesian cube)
* pcs 2005

Parameters
		float dx=1.   float dy=1.   float dz=1.   int fill=1 wavefronts file (a,g,h,t)   int nx=100   int ny=1   int nz=100   float ox=0.   float oy=0.   float oz=0.   int pick=2   bool verb=n [y/n]