Hi,
I integrated an overlays system into my code that essentially supports multiple
overlays, each having multiple hud items. Each overlay uses an osg::Camera at
its root. All this works very well, with the exception of the following issue:
when I remove the overlay (i.e the root camera) from the scene, I get a draw
crash (this does not happen all the time, but very often)
I made sure that the root of the scene (i.e Group node) has the data variance
set to DYNAMIC.
Here is the overlay camera constructor code:
Code:
setDataVariance( osg::Camera::DYNAMIC);
setReferenceFrame( osg::Transform::ABSOLUTE_RF );
setProjectionMatrix( osg::Matrix::ortho2D( -1, 1, -1, 1 ) );
setViewMatrix( osg::Matrix::identity () );
setClearMask( 0 );
setRenderOrder( osg::Camera::POST_RENDER );
// we don't want the camera to grab event focus from the viewers main
camera(s).
setAllowEventFocus(false);
osg::StateSet* pStateSet = getOrCreateStateSet( );
pStateSet->setMode( GL_DEPTH_TEST, osg::StateAttribute::OFF );
pStateSet->setMode( GL_LIGHTING, osg::StateAttribute::OFF );
pStateSet->setMode( GL_FOG, osg::StateAttribute::OFF );
pStateSet->setMode( GL_CULL_FACE, osg::StateAttribute::OFF );
pStateSet->setMode( GL_BLEND, osg::StateAttribute::OFF );
Cheers,
Guy
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=13067#13067
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