[vtkusers] vtkImageMapToColors + vtkTexture

[Matthew Bowman]

Well (like many others I'm replying to myself). So I've managed to do 
this as follows:

    vtkVolume16Reader v16 = vtkVolume16Reader::New();
    [ ... same as Medical3.cxx ... ]

    vtkImageReslice *transform = vtkImageReslice::New();
    transform->SetInputConnection(v16->GetOutputPort());
    transform->SetOutputExtent(0, 63, 32, 32, 0, 92);

    vtkTexture *texture = vtkTexture::New();
    texture->SetInputConnection(transform->GetOutputPort());
    texture->SetLookupTable(satLut);

    vtkActor *plane = vtkActor::New();
    plane->SetTexture(texture);
    [ ... same as Medical3.cxx ... ]

The texture is now being displayed properly (the correct slice is being 
pulled out of the volume), however if I try and change the slice (using 
SetOutputExtent(int[]) on vtkImageReslice) nothing happens. The original 
OutputExtent is still getting used by the vtkTexture.

Is there something I'm doing wrong with trying to have the vtkTexture 
use a "dynamic" source?

Thanks in advance for any replies!
--Matthew Bowman

Matthew Bowman wrote:
> Greetings all. I'm new to VTK so take it easy on me :-)
>
> I'm trying to expand on the Medical3.cxx example by taking the 
> vtkImageMapToColors + vtkImageActor and visualize the result on a 
> vtkPlaneSource (vtkPlaneSource -> vtkPolyDataMapper -> vtkActor). I'm 
> trying to accomplish this to be able to slide the slice through the 
> model and visualize the plane dynamically (as opposed to statically). 
> I've tried to do this with vtkTexture but it gives me an error saying 
> 3D textures are not supported.
>
> What I'm doing (mostly copied form Medical3.cxx):
>
>    vtkPlaneSource xPlaneSource = vtkPlaneSource::New();
>
>    vtkPolyDataMapper xPlaneMapper = vtkPlaneMapper::New();
>    xPlaneMapper->SetInputConnection(xPlaneSource->GetOutputPort());
>
>    vtkActor xPlane = vtkActor::New();
>    xPlane->SetMapper(xPlaneMapper);
>
>    vtkLookupTable *bwLut = vtkLookupTable::New();
>    ... [same as example] ...
>
>    vtkImageMapToColors *xImageMap = vtkImageMapToColors::New();
>    xImageMap->SetInputConnection(v16->GetOutputPort());
>    xImageMap->SetLookupTable(bwLut);
>
>    vtkTexture *texture = vtkTexture::New();
>    texture->SetInputConnection(xImageMap->GetOutputPort());
>
>    xPlane->SetTexture(texture);
>
> Anyone out there know what I'm doing wrong (or if I'm even shooting in 
> the right direction?)
>
> Thanks in advance for any responses!
> --Matthew
>
>
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