Robert Osfield wrote:
HI Tugkan,The most likely cause is state or drawables being updated while the draw thread is still reading from them, the mechanism to prevent the them overlapping this is based on the use of DataVariance being set to DYNAMIC. See my previous posts on this topic.
Hi Robert,I've worked more on the subject and repeated the crash in a simple application derived from osgviewer. You can find it attached. Unlike our application it also happens in SingleTreaded mode here. As far as I understand the new threading system it should be safe to access the scene graph outside the frame() method. And anyway it is single threaded mode here.
As I was working on this problem I ran into another problem also. If I call viewer.getCamera()->getOrCreateStateSet()->setDataVariance( osg::Object::DYNAMIC ) before the main loop and switch to DrawThreadPerContext mode using 'm' application freezes.
See if blocks at the end of the main(). First block is for freezing and the second block is for crash.
Tugkan
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osgviewer.cpp.tar.gz
Description: GNU Zip compressed data
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