[vtkusers] how to pick cells?

[liuy]

Hi,
 I don't konw that if vtkcellpick can only pick one cell or more, and the cell's scalar value can pick?
the 
      virtual float vtkCellPicker::IntersectWithLine  (  float    p1[3],  
      float    p2[3],  
      float    tol,  
      vtkAssemblyPath *    path,  
      vtkProp3D *    p,  
      vtkAbstractMapper3D *    m 
     )  [protected, virtual] 

I don't konw how it's   function and how to use it.

Specially, I want to draw a line or curve on a 3D object and display the 2D section.Could you tell me how to do that.
Thanks.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20050724/40c89843/attachment.htm>