[vtkusers] Re: vtkusers digest, Vol 1 #1884 - 11 msgs

[Nico Vermaas]

Hi Dennis,

I have exactly the same problem with 4.x on Linux (Suse 7.3), if you find a solution let me know. Will do the same.

Nico
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Message: 4
From: <dsjen at cs.unc.edu>
To: vtkusers at public.kitware.com 
Date: Fri, 13 Jun 2003 13:20:01 -0400
Subject: [vtkusers] Volume Opacity

Hello VTK Users,

I'm having trouble changing the opacity of a vtkVolume.  I'm creating 
a vtkPiecewiseFunction and adding the following points to the function 
with the following lines of code, where opacity is a the piecewise 
function:

	opacity.AddPoint(0, 0.0);
	opacity.AddPoint(255,0.0);

This should make the volume completely transparent after I set the 
opacity of the volume:

	...
	...
	property.SetScalarOpacity(opacity);
	...
	...
	actor.SetProperty(property);
	...
	...

If anyone has any suggestions, needs clarification, or can point me to 
any references, I'd be very grateful.  Also, just for reference, I'm 
using vtk4.0 on WindowsXP.

Thanks,
Dennis



====================================================
Nico Vermaas
ASTRON - Westerbork Synthesis Radio Telescope
Schattenberg 1 - 9433 TA Zwiggelte - The Netherlands

tel: +31 593 598710                 
vermaas at astron.nl 
====================================================