[vtkusers] How do you turn on/off a pipeline?

[Prabhu Ramachandran]

hi,

	Thanks for all the tips.  But how does one do all this with
python?  Using SetInput(0) results in an exception (SystemError).  Or
should I just do something like

c = vtkContourFilter()
# do something with c
...
# turn c off
s = vtkPolyDataReader()
c.SetInput(s.GetOutput())
# do whatever
...
# turn it back on
c.SetInput(correct_object.GetOutput())

Is there no other way to do this?  Or am I missing something?

prabhu

>>>>> "Law" == Charles Law <charles.law at kitware.com> writes:

    Law> Setting the output of a source/filter to NULL will have the
    Law> same effect.  Turn the pipeline back on by setting the output
    Law> back to the old value.

    Law> Charles.

    Law> At 10:57 AM 7/5/00 +0100, John Biddiscombe wrote:
    >> >A simple question: > How does one turn on or off a particular
    >> VTK pipeline?  Or how >does one disconnect a pipeline??
    >> 
    >> Write a simple filter which takes an input, and generates an
    >> output, all it does is copystructure from input to output and
    >> pass point and cell data, override the update mechanism so that
    >> when flag=false, output doesn't get updated, when flag=true it
    >> acts as usual.
    >>