[vtkusers] Writing a rotated vtkcubesource in a .vtp file

[Cory Quammen]

You'll need to translate your cube by the negated center of the cube, then
rotate. You can do this all in the same vtkTransform object.

- Cory

On Wed, Jul 22, 2015 at 1:58 PM, ishantembhekar <ishan.tembhekar at caltech.edu
> wrote:

> <
> http://vtk.1045678.n5.nabble.com/file/n5733047/Screen_Shot_2015-07-22_at_10.png
> >
>
> Hi Cory,
>
> Thank you so much for your immediate response! The
> vtkTransformPolyDataFilter worked and it now gives me a rotated cube. I
> replaced the mapper and the actor with the following lines:
>
> //create a rotation object
>     vtkSmartPointer<vtkTransform> rotation =
>       vtkSmartPointer<vtkTransform>::New();
>     //the angle is measured in degrees for some reason
>     rotation->RotateZ(45.);
>  //use this rotation object in a transformFilter
>     vtkSmartPointer<vtkTransformPolyDataFilter> transformFilter =
>       vtkSmartPointer<vtkTransformPolyDataFilter>::New();
>     transformFilter->SetInputConnection(cubeSource->GetOutputPort());
>     transformFilter->SetTransform(rotation);
>     transformFilter->Update();
>
> However, it is rotating about the z-axis and the origin (as shown in the
> image I attached). What can I do for it to rotate about the center of the
> cube? I tried using SetCenter for both the vtkTransform and the
> PolyDataFilter but they do not have that method. Any ideas?
>
> Thanks once again!
>
> -Ishan
>
>
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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