Posted by sailsman63 on Dec 26, 2020; 6:35pm
URL: https://forum.jogamp.org/SOLVED-Purple-and-Green-Lines-Stripes-on-All-JOGL-Windows-tp4040923p4040926.html

I notice that both examples here are using the (ancient) immediate mode.

Is this also true of you main project? If so, perhaps Nvidia's driver for your card has a bug with that type of rendering...

Maybe try a simple triangle using more modern OpenGL calls. (third party tutorial here for very basic vertex buffer + shader, should translate into Java-JOGL very easily)

This would at least narrow down if the issue is in the JOGL library in general, or specific to the drawing mode.