invalid use of incomplete type ‘std::ifstream in readNodeFile

[kyungsoo hong]

Hi,

Thanks you 
I will tried several time to install for that, 
By the way, "CMake to my OpenSceneGraph
directory using the OSG_DIR directory"
how to do that, 

can you elaborate more ?
1. what is OpenSceneGraph? installed directory or source directory?
2. where do i declare OSG_DIR? in path?


... 

Thank you!

Cheers,
kyungsoo

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