GlReadPixels behave weird on QGLWidget

  • Hi there,

    I'm a beginner of Qt. I'm using Qt 5.2.1.
    To make a pickup function of vertices on OpenGL, I used glReadPixels, which is a function of OpenGL.
    However, it returns a wrong value, so I cannot obtain correct depth from glReadPixels.
    I guess x,y coordinate of openGl does not correspond to those of QGLWidget correctly.

    Could anyone help me? My priority is to make a pickup function, so if you have an alternative, it should be fine as well.


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