[vtkusers] vtkBlend Output

[David Gobbi]

Hi Alexis,

Have you tried it without the stencil, for comparison?  The
vtkImplicitFunctionToImageStencil filter is very slow.

  David


On Mon, Nov 1, 2010 at 5:57 PM, Alexis Cheng <acheng_1221 at hotmail.com> wrote:
> Hi all,
>
> Is vtkBlend extremely resource intensive? I have a following piece of code
> running: FinalImage is a vtkImageData object, MTImage is a vtkImageData
> object, and blend1 is a vtkImageBlend object.
>
>         blend1->SetStencil(dataToStencil->GetOutput());
>         blend1->AddInput(MTImage);
>         blend1->AddInput(BlackImage);
>         blend1->SetOpacity(0,0.5);
>         blend1->SetOpacity(1,0.5);
>
>         if(OutOfView)
>         {
>             FinalImage = MTImage;
>         }
>         else
>         {
>             FinalImage = blend1->GetOutput();
>         }
>         FinalImage->Update();
>
> The fps of my display decreases dramatically whenever the output from blend
> is requested. Is this behaviour expected? Thanks in advance.
>
> Cheers,
> Alexis Cheng
> Electrical Engineering
> University of British Columbia
>
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