hello-gl
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dont switch image
hi, RealTech's free OpenGL Extensions Viewer says my laptop support opengl3.1 my Desktop PC support opengl2.1 i tried both computer in the laptop work fine.. but on my very old computer Desktop PC dont change the image.. stay still on the first image.. the tutorial (http://duriansoftware.com/joe/An-intro-to-modern-OpenGL.-Table-of-Contents.html) says opnegl 2.0 so should work