[vtkusers] Create "ovoid" with VTK

[Bill Lorensen]

Or try:
// .NAME vtkParametricEllipsoid - Generate an ellipsoid.
// .SECTION Description
// vtkParametricEllipsoid generates an ellipsoid.
// If all the radii are the same, we have a sphere.
// An oblate spheroid occurs if RadiusX = RadiusY > RadiusZ.
// Here the Z-axis forms the symmetry axis. To a first
// approximation, this is the shape of the earth.
// A prolate spheroid occurs if RadiusX = RadiusY < RadiusZ.



On Tue, Jul 9, 2013 at 5:11 PM, Shawn Waldon <swaldon at cs.unc.edu> wrote:

> 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
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
>


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