Posted by gouessej on Jan 14, 2014; 9:18pm
URL: https://forum.jogamp.org/Poor-Performance-with-glVertexAttribPointer-tp4031170p4031220.html

If you modify the data in the direct NIO buffer you created by yourself without passing them to OpenGL, the changes won't be reflected. Keep in mind that the direct NIO buffer on the CPU and the data store on the GPU are 2 different things.