[vtkusers] Importing headsq data into a 3D matrix

[Ankur Deshmukh]

Hey Guys,

1.  I am trying to import the headsq/quarter data into a 3D matrix. I 
was wondering how to go about it.
2. Also I am asking the user to pick some points in the aftedr rendering 
the headsq/quarter data. I was wondering how to match the picked point 
to a point in the 3D grid I create.

Thanks in advance

-Ankur