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

[ohsuga at nucl.phys.titech.ac.jp]

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