[vtkusers] Create "ovoid" with VTK

[Shawn Waldon]

You probably want something more like:

vtkSphereSource *sSource= vtkSphereSource::New();
   sSource->SetThetaResolution( 12);
   sSource->SetPhiResolution (  12);
   sSource->SetCenter( 0, 0, 0 );
   sSource->SetRadius( 10.0 );

vtkTransform* transform = vtkTransform::New();
     transform->Identity();
   transform->Scale(3,1,1);
   transform->Update();
vtkTransformPolyDataFilter* tFilter = vtkTransformPolyDataFilter::New();
tFilter->SetInputConnection(sSource.GetOutputPort());
tFilter->SetTransform(transform);
tFilter->Update()

vtkPolyDataMapper *map = vtkPolyDataMapper::New();
map->SetInputConnection(tFilter->GetOutputPort());

.................

I didn't change your example much due to laziness and wanting to
copy/paste, but you really should use vtkSmartPointers.



On Tue, Jul 9, 2013 at 5:06 PM, mar x <myint101 at gmail.com> wrote:

> Dear VTK list,
>
> I want to create a 3D object that looks like an egg/ovoid. I tried to to
> this with vtkSphere and by setting the vtkTransform->Scale to something
> like 3,1,1 but it's not working. I would be very glad if you could help me
> on this. Please find below the code and thank you for any help!
>
>
> vtkSphereSource *sSource= vtkSphereSource::New();
>    sSource->SetThetaResolution( 12);
>    sSource->SetPhiResolution (  12);
>    sSource->SetCenter( 0, 0, 0 );
>    sSource->SetRadius( 10.0 );
>
> vtkTransform* transform = vtkTransform::New();
>      transform->Identity();
>    transform->Scale(3,1,1);
>    transform->Update();
>    vtkSphere* sphere = vtkSphere::New();
>    sphere->SetCenter(0,0,0);
>   sphere->SetTransform(transform);
>
>      vtkSmartPointer<vtkClipPolyData> clipper =
> vtkSmartPointer<vtkClipPolyData>::New();
>     clipper->SetInputConnection(sSource->GetOutputPort());
>     clipper->SetClipFunction(sphere);
>     clipper->SetValue(0);
>     clipper->Update();
>
>   vtkPolyDataMapper *map = vtkPolyDataMapper::New();
>   map->SetInput(clipper->GetOutput());
>
>   vtkActor *aSphere = vtkActor::New();
>   aSphere->SetMapper(map);
>   aSphere->GetProperty()->SetColor(0,0,1);
> ......
> .....
> .....
>
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-- 
Shawn Waldon
Graduate Student
Department of Computer Science
University of North Carolina at Chapel Hill
swaldon at cs.unc.edu
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