> Standard display() scenario:
>
> if(!sceneInitialized) {
>   GL2 gl = drawable.getGL().getGL2();
>   gl.glEnableClientState(GL2.GL_VERTEX_ARRAY);
>   long length = buffLen * GLBuffers.SIZEOF_FLOAT;
>
>   gl.glGenBuffers(1, VBOidV, 0);
>   gl.glBindBuffer(GL2.GL_ARRAY_BUFFER, VBOidV[0]);
>   gl.glBufferData(GL2.GL_ARRAY_BUFFER, length, vBuff, GL2.GL_STATIC_DRAW);
>
> ...repeat for normals...
>
>   gl.glDisableClientState(GL2.GL_VERTEX_ARRAY);
>
>   gl.glFinish();
>   System.out.println("clContext = " + clContext);
>   clBuffer = clContext.createFromGLBuffer(VBOidV[0], length, CLGLBuffer.Mem.READ_ONLY);
>
>   sceneInitialized = true;
> }
>
>
> The graphics for this display /beautifully/.
> However, the *createFromGLBuffer* crashes randomly.
>
> Actually, not completely randomly.
> I load a new "model" and call *canvas.display()* (i.e. repaint-on-demand)
> *clContext* does not change.
> *createFromGLBuffer* throws an exception about 2/3 the time.
>
> com.jogamp.opencl.CLException$CLInvalidGLObjectException: can not create CLGLObject from #1 [error: CL_INVALID_GL_OBJECT]
>
>
> This seems like some kind of timing/threading problem.
> (*canvas.display()* appears to be threaded)
>
> The jogamp use guide isn't much help here - the section under "AWT
> Multithreading Issues" starts with "Below statements incorrect!"
>
> Any clue as to how to approach this?