Giorno: 6 Maggio 2014

    GLWindow window;
    FPSAnimator animator;
    GLRenderer renderer;

    public Main() {
        initComponents();

        window = GLWindow.create(new GLCapabilities(GLProfile.getDefault()));
        window.setTitle("OpenGL prova - GLWindow");
        window.setSize(800, 600);
        renderer = new GLRenderer();
        window.addGLEventListener(renderer);
        animator = new FPSAnimator(window, 60, true);
    }

---

    private void btnHideActionPerformed(java.awt.event.ActionEvent evt) {                                        
        window.setVisible(false);
    }                                       

    private void btnShowActionPerformed(java.awt.event.ActionEvent evt) {                                        
        window.setVisible(true);
    }                                       

    private void btnStartActionPerformed(java.awt.event.ActionEvent evt) {                                         
        animator.start();
    }                                        

    private void btnStopActionPerformed(java.awt.event.ActionEvent evt) {                                        
        animator.stop();
    }                                       

    private void btnFullscreenActionPerformed(java.awt.event.ActionEvent evt) {                                              
        window.setFullscreen(btnFullscreen.isSelected());
    }

---

    double a = 0.0;

    @Override
    public void display(GLAutoDrawable drawable) {
        GL2 gl = drawable.getGL().getGL2();

        gl.glClear(GL2.GL_COLOR_BUFFER_BIT);

        gl.glBegin(GL2.GL_QUADS);
        gl.glColor3f(1, 1, 1);
        for (int i = -4; i < 4; i++) {
            for (int j = -4; j < 4; j++) {
                if ((i + j) % 2 != 0) {
                    gl.glVertex2d(i / 4.0, j / 4.0);
                    gl.glVertex2d(i / 4.0 + 0.25, j / 4.0);
                    gl.glVertex2d(i / 4.0 + 0.25, j / 4.0 + 0.25);
                    gl.glVertex2d(i / 4.0, j / 4.0 + 0.25);
                }
            }
        }
        gl.glEnd();

        // inserire un rombo rosso che si sposta da sinistra a destra

        a += 0.01;
    }