[vtkusers] Re: vtk Gurus

[dean.inglis at camris.ca]

Darryl,

if you have a surface you could cut it with a
cutting filter to get a 2D polyline or polydata
and feed that slice by slice into a pipeline 
similar to what is done in the image stencil 
of Examples/GUI/Tcl/ImageTracerWidget.tcl
or (recent cvs) Widgets/Testing/Cxx/TestImageTracerWidget.cxx
or (formerly) Hybrid/Testing/Cxx/TestImageTracerWidget.cxx
and then use vtkImageThreshold to null out what
is inside the individual slices.  Try building
a simpler pipeline with one image slice to see
how this may work first.

ITK would probably do the 3D implementation more 
transparently though.


Dean