[vtkusers] problem deriving from vtkVolumeRayCastCompositeFunction

[Abhishek]

I derive a class from vtkVolumeRayCastCompositeFunction as:

 

Class VTK_RENDERING_EXPORT aktVolumeRayCastDRRCompositeFunction :

      public vtkVolumeRayCastCompositeFunction

 

The only function I override is the RayCast function. I create an instance
of the new derived class as follows:

 

aktVolumeRayCastDRRCompositeFunction *compositeFunction =
(aktVolumeRayCastDRRCompositeFunction *)
aktVolumeRayCastDRRCompositeFunction::New();

 

And pass this composite function to the volume mapper. But the RayCast
function that I override does not seem to get called. Instead the one in
vtkVolumeRayCastCompositeFunction is being called. I am obviously missing
something here. Can anyone tell me what should be the steps to successfully
override from vtkVolumeRayCastCompositeFunction. Thanks,

 

-Cheers,

Abhishek 

 

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