REGRID3 - REwrite a [ni3][ni2][ni1] GRID to a [no3][no2][no1] 3-D grid

regrid3 < oldgrid > newgrid [parameters]

Optional parameters:
ni1=1 fastest (3rd) dimension in input grid
ni2=1 second fastest (2nd) dimension in input grid
ni3=1 slowest (1st) dimension in input grid
no1=1 fastest (3rd) dimension in output grid
no2=1 second fastest (2nd) dimension in output grid ",
no3=1 slowest (1st) dimension in output grid
Optional Parameters:
verbose=0 =1 print some useful information

Notes:
REGRID3 can be used to span a 1-D grid to a 2-D grid, or a 2-D grid
to a 3-D grid; or to change grid parameters within the dimensions.
Together with unisam, unif2 and tmb, most 3-D velocity model can be


Credits:
CWP: Zhaobo Meng, 1996, Colorado School of Mines