Hi,
I implemented a 'PausableViewer', to enable dynamically 'hiding' and 'showing'
the window. I did it in the following way:
On pause, I set done to true, create a new GraphicsContext with the same traits
of the previous GraphicsContext, stop the viewer threading and switch them -
Code:
pause()
{
auto traits = new
GraphicsContext::Traits(*getCamera()->getGraphicsContext()->getTraits());
auto gc = GraphicsContext::create(traits);
stopThreading();
getCamera()->setGraphicsContext(gc);
setDone(true);
}
On resume, I resume the threading and set done to false -
Code:
resume()
{
setDone(false);
startThreading();
}
This works well, but when using with osgEarth's SkyNode as the scene data of
the viewer, after the second context switch and onward, I get these errors in a
loop:
glValidateProgram FAILED "" id=4 contextID=0
glValidateProgram FAILED "SimpleSky Atmosphere" id=7 contextID=0
Warning: detected OpenGL error 'invalid operation' at RenderBin::draw(..)
I can also recreate the error using a regular Viewer, by closing a Viewer but
saving the scene data and giving it to a new Viewer:
Code:
ref_ptr<Group> root = new Group;
auto mapNode = new MapNode;
auto skyNode = SkyNode::create(mapNode);
skyNode->addChild(mapNode);
root->addChild(skyNode);
while (true)
{
Viewer viewer;
viewer.setCameraManipulator(new EarthManipulator);
viewer.setSceneData(root);
viewer.run();
}
I know that this problem might stem from the osgEarth side of things, and I've
asked there, but I'm wondering if anyone might have a clue to why this happens.
Cheers,
Eran
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=73696#73696
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