Hi Robert,

Firstly, I am grateful for your quick reply.

I intend to have a 3D view that is overlay by the Orthographic view as a HUD. 
That is right. So i am trying to derive hud example. Because of this, i have 
added the hud camera as a slave.
You say that slave cameras only clear the depth buffer and I think problem is 
that. 
The only thing i did not understand you say that i did not set up the main 
camera. I am asking to you "How to set up the main camera?" In osgviewerQt 
example, Nothing is done to viewer's default camera except setting graphic 
context to default camera. I have already set the graphical context to the 
default camera in addition to setting it to the slave camera. But nothing 
changed.
On the other hand the same code works well if i dont integrate it to QT. There 
is no problem related to the depth buffer or any other thing.

Finally, The problem is still unresolved. Any other idea??

Best regards,


robertosfield wrote:
> Hi Ali,
> 
> I'm not a Qt expert, but I have just had a look through your code
> example and don't see anywhere you have set up a the View's main
> Camera.  I looks like you just add a Slave camara, and that slave
> Camera only clears the depth buffer.
> 
> I don't understand why you have gone for the set up you have, if you
> just need a single orthographic view then you should just set up the
> View's master Camera's projection and view matrix accordingly and not
> both with the addSlave.
> 
> If you intend to have a 3D view that is overlay by the Orthographic
> view as a HUD, and the two are directly related then a slave Camera
> might be appropriate.  Ask yourself, conceptually is the HUD a
> different View, or is it contributing to the same View.
> 
> Robert.
> _______________________________________________
> osg-users mailing list
> 
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> 
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