Posted by gouessej on Jan 16, 2018; 3:02pm
URL: https://forum.jogamp.org/JOGL-Swing-Multiple-viewports-tp4038537p4038547.html

Yes GL_BACK is the default when you enable the face culling. Your source code seems to be correct, the problem is elsewhere.

Edit.: Maybe the winding of your vertices isn't the one you expect.