draw with vtkImageCanvasSource2D in every slice

[Charles Law]

<x-flowed>Adrian,

In VTK2.4 vtkImageCanvasSource could only draw in the first slice.  This 
has been fixed.
If you want, you can use vtkImageTranslateExtent to move the slice to 0, 
and then draw on it.

Charles.


At 04:30 PM 12/6/99 +0100, you wrote:
>hello
>
>I read some ct-slices in a vtkImageData. Now I want to draw in each slice
>with vtkImageCanvasSource2D.
>
>I tried the following:
>
>vtkImageThreshold  * threshold = vtkImageThreshold::New();
>   ..
>   threshold->Update();
>
>vtkExtractVOI  *extract = vtkExtractVOI::New();
>vtkImageCanvasSource2D *canvas = vtkImageCanvasSource2D::New();
>
>for (int slice = 0; slice < 20; slice++) {
>       extract->SetInput( threshold->GetOutput() );
>       extract->SetVOI( 0, x-1, 0, y-1, slice, slice );
>       extract->Update();
>
>       canvas->SetImageData( extractorT->GetOutput() );
>       canvas->SetDrawColor( 200 );
>       canvas->FillPixel( 0, 0 );
>       canvas->Update();
>}
>
>now I display the slices but I just get the slices without the drawing.
>If I set canvas->SetImageData( threshold->GetOutput() );
>I get the drawing just in the first slice. What do I have to change or is
>there an other way to do this ?
>
>Thanks,
>
>Adrian
>
>
>
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</x-flowed>