[vtkusers] How to get a pointer to the instance of vtk***Source from vtkActor

[Amy Squillacote]

Hi Masa,

What version of VTK are you using?  If you are using VTK 5.0 or the 
current CVS version, GetSource is likely to return NULL since that 
was part of the old pipeline structure.  Instead try calling the following.

vktSphereSource* sphSource = 
(vtkSphereSource*)(Actor->GetMapper()->GetInput()->GetProducerPort()->GetProducer());
sphSource->SetPhiResolution(10);

- Amy

At 05:07 AM 4/4/2006, ohsuga at nucl.phys.titech.ac.jp wrote:
>Hi Kjeld,
>
>Thanks for your answer. But It seems I can not get a pointer to the
>instance of vtkSphereSource.
>
>When the following lines are added at the very end of the sample,
>---
>vktSphereSource* sphSource =
>(vtkSphereSource*)Actor->GetMapper()->GetInputAsDataSet()->GetSource();
>     sphSource->SetPhiResolution(10);
>---
>I encounterd a Null pointer exception.
>I did something wrong?
>
>Thanks,
>Masa
>
>
> > hi Masa
> >
> > Her you got it
> >
> > sphSource = (vtkSphereSource
>*)Actor->GetMapper()->GetInputAsDataSet()->GetSource();
> >
> > Best regards Kjeld
> >
> > > Dear all,
> > >
> > > In the following example,
> > > I'd like to get a pointer to the instance of vtkSphereSource class from a
> > > pointer to the instance of vtkActor class.
> > > How Can I do this?
> > > I mean I only know sphereActor and would like to reset the 
> PhiResolution of
> > > sphere.
> > > -----------------------------------------------------------
> > > vtkSphereSource* sphere = vtkSphereSource::New();
> > >     sphere->SetRadius(3);
> > >     sphere->SetPhiResolution(10);
> > >     sphere->SetThetaResolution(10);
> > > vtkPolyDataMapper* sphereMapper = vtkPolyDataMapper::New();
> > >     sphereMapper->SetInput(sphere->GetOutput());
> > > vtkActor* sphereActor = vtkActor::New();
> > >     sphereActor->SetMapper(sphereMapper);
> > > ------------------------------------------------------------
> > >
> > > Thank you very much in advance.
> > >
> > > Cheers,
> > > Masa
> > > --
> > > ohsuga at nucl.phys.titech.ac.jp
> > > _______________________________________________
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> >
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>--
>ohsuga at nucl.phys.titech.ac.jp
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