[vtkusers] FW: call glColorMask from vtk

[Luca Ramundo]

From: luca.ramundo at hotmail.it
To: utkarsh.ayachit at kitware.com
Subject: RE: [vtkusers] call glColorMask from vtk
Date: Thu, 28 May 2009 10:07:48 +0200








Hi..
I listen to your suggestion, but I think thath glColorMask can be used only after this instruction: myVtkRenderWindow->Render(); ...is it right?
So glColorMash is applyed at all scene while I'd like to use glColorMask only for a particular actor (a kind of box which serves as a mask).
Whath do you think about this?
Thanks a lot...

Luca

Date: Tue, 26 May 2009 12:45:54 -0400
Subject: Re: [vtkusers] call glColorMask from vtk
From: utkarsh.ayachit at kitware.com
To: luca.ramundo at hotmail.it
CC: vtkusers at vtk.org

Try implementing your own mapper or actor. You can make openGL calls in Render methods in these classes.

Utkarsh

On Tue, May 26, 2009 at 10:48 AM, Luca Ramundo <luca.ramundo at hotmail.it> wrote:






hi all,
I need your help for my great problem. I'd like to visualize a 3D object in my scene with the follow properties:
It must to be invisible but not trasparence because it has to hide some object inside it.

I know that there is a openGL method to do it: glColorMask(). It is used to write or not in frame buffer some color component.
I'd like if there is something to resolve my problem in VTK or the way to call this openGL method from my vtk object.

Thanks a lot,
Luca
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