[vtkusers] Problem rotating vtkImageSlice

[David Gobbi]

Hi Ang,

The PokeMatrix() method is an internal method that VTK uses for picking.
If you use it for rendering, it might corrupt the state of the VTK pipeline.

Use SetUserMatrix() instead.

 - David


On Tue, Apr 18, 2017 at 1:50 AM, Ang <ysa0829 at gmail.com> wrote:

> Hi David,
>
> I would like to flip around X axis for vtkImageSlice (not original pixel
> data ,just flip actor),below is my code.
>
> //***********************************************//
> double *tranlate = imageSlice->GetCenter();
>
> vtkTransform *trans = vtkTransform::New();
> trans->PostMultiply();
>
> trans->Translate(-tranlate[0], -tranlate[1], -tranlate[2]);
> trans->RotateY(180);
> trans->Translate(tranlate[0], tranlate[1], tranlate[2]);
>
> imageSlice->PokeMatrix(trans->GetMatrix());
> //***********************************************//
>
> As your mentioned in the thread, I cant rotate the vtkImageSlice by using
> vtkMatrix so I got wrong result.
>
> Would you have some suggestion to  flip around X axis for vtkImageSlice?
>
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