[vtkusers] changing transfer functions interactively ?

[Steffen Oeltze]

Dear VTK-users,

I've written a program that renders a volume using ray-casting. I'd like 
to enable the user
to change the transfer functions for opacity and color interactively by 
using sliders. Has
anybody an idea or a source code sample ? Or is there maybe a better way 
than using
sliders ?

Regards,
Steffen