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Canvas troubleshooting: Difference between revisions
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→Dumping Canvas scene graphs to disk
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osgviewer my-little-sg.osg | osgviewer my-little-sg.osg | ||
</pre> | </pre> | ||
As can be seen in the osgviewer screen shot, our osgText nodes are not properly transformed - i.e. the appearance doesn't quite match the original canvas in FlightGear. This is because we are directly dumping the corresponding osg::Nodes at the element level, without taking into account the top-level camera allocated by ODGaugage (our RTT/FBO helper) - to address this, we need to dump the top-level camera group instead, which also contains the transformation matrix that is used by the lower level nodes: | |||
<syntaxhighlight lang="diff"> | |||
</syntaxhighlight> | |||
Using this helper function, we'll get a correctly transformed scene graph, matching the one originally created and shown inside FlightGear. | |||
Once we inspect the scene graph, we'll see that it contains quite a bit of redundant state. | Once we inspect the scene graph, we'll see that it contains quite a bit of redundant state. | ||