Re: [openvrml-develop] openvrml::gl::browser in an OpenGL context

[Marwan B. <La...@fr...>]

Braden McDaniel wrote:
> On Tue, 2005-12-20 at 13:33 +0100, Marwan Badawi wrote:
> 
>>Hello all,
>>
>>I have an application that uses OpenGL to do some pretty low level stuff 
>>for manipulating geometries (I will pass the details). I would like to 
>>use an openvrml::gl::browser (or another alternative) to draw vrml 
>>objects into the already established OpenGL context, using it's 
>>lighting, viewport, projection and modelview matrices.
>>
>>What would be the best way to do so?
> 
> 
> Presumably you mean openvrml::gl::viewer.
> 
> As far as an OpenGL renderer is concerned, openvrml::gl::viewer is all
> that OpenVRML gives you. I suspect you could get the functionality you
> need by inheriting it and selectively overriding its methods.
> 
> In the worst case (i.e., if you find openvrml::gl::viewer working
> against you too much), you can create your own renderer from scratch by
> inheriting openvrml::viewer just like openvrml::gl::viewer does.
> 

Yes, you are right. It is actually a openvrml::gl::viewer that I would 
have to use to draw the contents of a openvrml::gl::browser. With that 
said, I can't seem to find a way to pass the current OpenGL context to 
the viewer. Is that even possible? Or does the viewer create it's own 
context?
My problem is, since that I draw other types of objects in my scene (not 
only VRML), all camera viewpoints, zoom, frustum and lighting settings 
are already taken care of. All I want to do is draw a vrml object into 
the alreday existing scene using the already existing context. If the 
viewer/browser combination allows me to do so, it would be a lot of help.

On a small note, I need to render completely static scenes, so no 
animations. Also support for script nodes is completely unnecessary. I 
only need to draw the geometry, and nothing else. Don't know if this 
makes the problem easier to solve.

Thank you again,

Marwan