Help

  I am trying to use Geomview to draw phase diagram. 
I have two questions to ask.
  1. What is the 4Dview? Why the geomview use 4 float numbers 
     to represent a point in 4D data file? What is the fourth 
     component?
  2. Can I use the slicing button to slice a 3D object?
  
  Please tell my by E-mail if you know the answer. 
Thanks for your attention.


                          Ye Jiang