[vtkusers] RE: changing transfer functions interactively

[Andreas Loesch]

Dear Steffen,

I wouldn't use Sliders because you might need more fixpoints for the
function. I am planning something similar by giving the user a 2D-graph
widget where the transfer function can be manipulated. So let the user
draw the function scalar->opacity.

Andreas

> 
> 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
>