Egor Puzanov

I've found why coin3d doesn't work correctly on the Wayland environment. The QGLWidget has a problem with a Wayland. I've re-implemented the QuarterWidget with QOpenGLWidget ( https://github.com/epuzanov/pivy/tree/QOpenGLWidget ).

The GLES is not an EGL. The Coin3d library used an OpenGL API, some part of it must be rewritten to be compatible with OpenGL ES API. The EGL support...