showIso <filename> <contour #> 
   Reads in a vtk formatted file and displays isosurface
   datafiles 
	tesla.vtk 
	hydro.vtk

vtkHydro hydro.vtk
   Displays volume rendering of datafile 
   datafiles
   	hydro.vtk

volProt1 tesla.vtk
   Displays volume rendering of datafile. Different piecewise continuous 
     transfer function than vtkHydro
   datafiles
        tesla.vtk



Datafiles:

   hydro.vtk contains ascii byte-normalized values (ie 0-255), but
       is otherwise the same data as found in hydro/slices

   tesla.vtk contains ascii byte-normalized values (ie 0-255), but
       is otherwise the same data as found in  
       
