[osg-users] How to get Current ContextID?

[GeeKer Wang]

Hi, all

In GLUT, there is a function glutGetWindow to get the current context ID.

As far as I know, OSG get contextID for osg::RenderInfo in application. 

Are there other ways to get cureent GraphicContext ID in a thread?

--
Martin

[Robert Osfield]

Hi Martin,

All rendering code in the OSG gets passed either a RenderInfo object
which has the osg::State object for the current context or gets passed
the osg::State object directly, the osg::State has a getContextID()
method.

For none rendering code there isn't a current context so there isn't a
single ContextID that is appropriate, rather you have to decide which
active GraphicsContext in the viewer is appropriate, so just get the
windows from the viewer and then examine then for their osg::State
object and ContextID.

However, one must ask what your want the ContextID for, it's also
nothing to do with any context ID that GLUT might want to manage, the
osg::State::ContextID only has meaning with the OSG.

Robert.
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