Hi there,
How could i get progress information when osgDB::readNodeFile is used to load a 
model from external file. i want to show a progress bar if the loading time is 
significant too long to end user. i have to load a shapefile which is about 
157M . It takes few of seconds in my PC, so that i want to use a progress bar.

Regards,
Abe.Zhu
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