Hi Robert,
I just tried the uniform setting for the camera and it worked quite nice.
But I'm not able to use a callback to do the updating stuff :-(.
I tried to install this callback:
Code:
struct ViewportCallback : public osg::Uniform::Callback
{
ViewportCallback( osg::Camera* camera )
: _camera( camera )
{
std::cout << "ViewportCallback::ViewportCallback()" << std::endl;
}
virtual void operator()( osg::Uniform* uniform, osg::NodeVisitor* /*nv*/)
{
std::cout << "ViewportCallback::operator()" << std::endl;
osg::Viewport * vp( _camera->getViewport() );
uniform->set( osg::Vec4( vp->x(), vp->y(), vp->width(), vp->height() )
);
}
osg::Camera* _camera;
};
and set it via
Code:
osg::Viewport * vp( viewer.getCamera()->getViewport() );
osg::Uniform * viewportUniform = new osg::Uniform( "viewport", osg::Vec4(
vp->x(), vp->y(), vp->width(), vp->height() ) );
viewportUniform->setUpdateCallback( new ViewportCallback(
viewer.getCamera() ) );
viewer.getCamera()->getOrCreateStateSet()->addUniform( viewportUniform );
But I don't get any output from operator() nor do I get an updated viewport
value in my shader.
What's wrong with this?
Thank you!
Cheers,
Christoph
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=73632#73632
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