OpenGL is a small application, interested developers can download to see. Ha ha.

Packet : 43680556oglu_shadow_volume_zfail.zip filelist
oglu_shadow_volume_zfail/codesampler.ico
oglu_shadow_volume_zfail/geometry.h
oglu_shadow_volume_zfail/oglu_shadow_volume_zfail.cpp
oglu_shadow_volume_zfail/oglu_shadow_volume_zfail.dsp
oglu_shadow_volume_zfail/oglu_shadow_volume_zfail.exe
oglu_shadow_volume_zfail/oglu_shadow_volume_zfail.rc
oglu_shadow_volume_zfail/oglu_shadow_volume_zfail.vcproj
oglu_shadow_volume_zfail/resource.h

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