volume_dat2.c reading sphere_div.dat 
status=0, zmax=1, points=18, polys=32 

xmin=-1.000000, xmax=1.000000, ymin=-1.000000, ymax=1.000000 
zmin=-1.000000, zmax=1.000000 
enclosing area= 24, enclosing volume= 8 

final total area = 10.4178, total volume = 2.94281