[IGSTK-Users] Augmented Reality Z-Buffer Question

[Cheng, Patrick]

Hi Jochen,

Why do you set the opacity of the real object to be 0 (totally
transparent)?

If you set your real object to be opaque. In VTK, you won't see the
polyline when it's behind the real object.

I might not understand your question. You might be better off direct
this question to the VTK's mailing list.

Patrick



-----Original Message-----
From: igstk-users-bounces at public.kitware.com
[mailto:igstk-users-bounces at public.kitware.com] On Behalf Of
s_goertl at ira.uka.de
Sent: Thursday, January 19, 2012 8:15 AM
To: igstk-users at public.kitware.com
Subject: [IGSTK-Users] Augmented Reality Z-Buffer Question

Hello,

I'm trying to achieve an augemented reality effect with VTK, but the
hidden line/surface removal gives me some headache.

I have a virtual representation of a real object and a polyline which is
supposed to be displayed as part of the augemented reality. How would I
setup VTK to not render the polyline when it would be invisible
(occluded) by the real object?

Is there a way to add the representation of the real object to the depth
buffer, even though its opacity is actually set to 0? Are there other
solutions to this problem?

Thank you very much!

Jochen
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