[vtkusers] Re: transparancy using vtkImageBlend

[Luca Pamparana]

Never mind! Saw the SetOpacity method. I should not drink anymore.....

On 4/12/07, Luca Pamparana <luca.pamparana at gmail.com> wrote:
>
> Hi everyone,
>
> I am playing around with the vtkImageBlend filter and I am having trouble
> with getting the underlying image to show through.
>
> So, the setup is as follows:
>
> I have two seperate image reslicers for the two input image volumes. Their
> output port both connect to an input port of the vtkImageBlend filter
>
> When I load the volumes, I center them in a viewing display. This is
> achieved as follows:
>
> // Set the output extent to our viewer size
> slicer1->SetOutputExtent(0, (int)m_sizeX - 1, 0, (int)m_sizeY -1, 0, 0);
> slicer2->SetOutputExtent(0, (int)m_sizeX - 1, 0, (int)m_sizeY -1, 0, 0);
>
> // After this set the output origin to be the center of the view.
>
> Now, as you can see the images occupy the whole view. Now, when I display
> the final result, the underlying image cannot be seen at all. Is there a way
> to set the transparancy so that the underlying image can be seen. Right now,
> the overlaid image is totally opaque...
>
> Thanks for your help.
>
> Luca
>
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