4Dview questions

[munzner]

>  2. Can I use the slicing button to slice a 3D object?

If you just want to slice a 3D object, use the module "Ginsu". 

>  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?

1. 4Dview allows you to examine four dimensional objects. Just as you
can determine a position in 3D space with 3 coordinates, you can
specify a position in 4D space with 4 coordinates: the 4D data file
contains x,y,z and w coordinates for each point.  4Dview allows you to
change the projection from 4D to 3D, and to slice the object in 4D.

>  I am trying to use Geomview to draw phase diagram. 

I'm not sure what this means: can you be more specific? Do you really
want to visualize four dimensions? If not, you don't need to use
4Dview.

Tamara Munzner          ((555) 555-5555
munzner at geom.umn.edu    The Geometry Center