//TODO @Before
public Gml createGml() {
gml = new Gml(new Vec3D(480, 240, 60));
GmlStroke stroke = new GmlStroke();
stroke.addPoint(new GmlPoint(new Vec3D(0.1f, 0.35f, 0.25f), 0.01f, 1, new Vec3D(), new Vec3D()));
stroke.addPoint(new GmlPoint(new Vec3D(0.85f, 0.35f, 0.25f), 0.02f, 1, new Vec3D(), new Vec3D()));
stroke.addPoint(new GmlPoint(new Vec3D(0.85f, 0.95f, 0.70f), 0.03f, 1, new Vec3D(), new Vec3D()));
stroke.addPoint(new GmlPoint(new Vec3D(0.10f, 0.95f, 0.70f), 0.04f, 1, new Vec3D(), new Vec3D()));
stroke.setLayer(0);
gml.addStroke(stroke);