    @Test
    public void testChangeAcceleration() {

        gps.setAcceleration(D3Vector.fromString("(x:-3.4427316345680223, y:-9.363483685842366, z:-0.6875842910570499)"));
        gps.setPosition(D3Vector.fromString("(x:366.30329775852334, y:183.53828228906738, z:53.59830231645528)"));
        gps.setVelocity(D3Vector.fromString("(x:-10.047801568808978, y:-17.60877350319855, z:0.9541791137955318)"));

//        D3Vector in = D3Vector.fromString("(x:-23.613400167909106, y:172.40476530548727, z:95.8106379471248)");
//        engine.changeAcceleration(in);
        engine.changeAcceleration(new D3Vector());
    }