[vtkusers] Transparency in VTK

[David Feng]

You can do what you want with:

(your vtkActor)->GetProperty()->SetOpacity(.5) 

Be careful, though.  You need to depth-sort your polygons in order for 
transparency to work as expected.  Otherwise, blending will happen in 
the wrong order.  You can do the sorting one of two ways:

1) enable depth peeling:  http://www.itk.org/Wiki/VTK/Depth_Peeling
2) plug your vtkPolyData into a vtkDepthSorter

The former is generally faster, depending on graphics hardware.

David

Arsham Mesbah wrote:
> Is there any way in VTK that we can change or set the transparency 
> factor?! Let say we have an object that is is visualized (a surface) 
> and we want to change the transparency factor to 50% or change it so 
> it will become see through (Not wire frame or anything! ) just see 
> through!
>
> -- 
> Sincerely Yours,
> Arsham Mesbah
> University of Georgia
> Department of Computer Science
> 415 Graduate Studies Research Center
> Athens, GA 30602
> Web: cs.uga.edu/~ars <http://cs.uga.edu/%7Ears>
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