[vtkusers] problem with vtkThreshold and downstream filters

Shyam Prakash ramakrishna.prakash at quest-global.com
Wed Sep 24 06:00:31 EDT 2003


Hi,
            My vtk pipeline looks as follows
 
            vtkPolyData (with some cell scalar values) 
                        |
            vtkThreshold
                        |
            vtkGeometryFilter
                        |
            vtkPolyData (say output1)           
 
 
Case1: Create an actor with/without scalar value using output1  -- works
fine
Case2: Pass output1 through any other filter before creating the actor.
For example
 
            Output1 (vtkPolyData)
                        |
            vtkPolyDataConnectivityFilter (say output2)
The actor created from output2 does not show anything. However I get
correct number of points from output1 and output2 when I use the method
GetNumberOfPoints(). What could be the problem? I am using vtk 4.2.2
with java wrappers.
 
Thanks
Shyam
            
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