Problems with Open-Source Downloads read https://www.qt.io/blog/problem-with-open-source-downloads and https://forum.qt.io/post/638946
GlReadPixels behave weird on QGLWidget
psyth16 last edited by
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.