This is a how OpenGL double buffer environment, the use of OpenGL to achieve rubber band functionality. Containing the source code and routines. Realize the function of the erase and redraw, thus improving the efficiency of OpenGL. This is what I found on the site from abroad, and share with you.

Log.cpp
Log.h
logs\log.txt
smof.dsp
smof.dsw
smof.opt
smof.plg
smotri.cpp
smotri.h
smotri.txt

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