private int toInt(float num){
        return (int)(num*65536);
    }
    public void onSurfaceCreated(GL10 gl, EGLConfig config) {
        prepareCube();
        int _I=toInt(0.1f);
        int _V=toInt(0.5f);
        int I=toInt(1.0f);
        int II=toInt(2.0f);