[vtkusers] Rotating image data

[Jothy]

Some sort of padding befor rotation should help.

Jothy

On Fri, Jul 9, 2010 at 12:32 PM, Srinivasa Rao
<srinivas at rsageventures.com>wrote:

> Hi All,
>
>    I am trying to rotate vtkImageData using vtkTransform and
> vtkImageReslice, i used following code to do the job.
>
>
> vtkImageData * rotateImage(vtkImageData *data, QPointF center, int angle)
> {
>         vtkTransform *imageTransform = vtkTransform::New();
>         imageTransform->PostMultiply();
>
>         imageTransform->Translate(center.x(), center.y(), 0.0);
>         imageTransform->RotateZ(angle);
>        imageTransform->Translate(-center.x(), -center.y(), 0.0);
>
>         // Now create filter and set previously created transformation
>         vtkImageReslice *algo = vtkImageReslice::New();
>         algo->SetInput(data);
>         algo->SetInformationInput(data);
>         algo->SetResliceTransform(imageTransform);
>         algo->SetInterpolationModeToLinear();
>         algo->Update();
>
>         return algo->GetOutput();
> }
>
>
> When i try to rotate image data, after rotation the data which is outside
> the image is getting lost.
> Is there a way around to rotate image data without data loss..
>
> thanks in advance.
>
> regards,
> srinivas.
>
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