public void init(EntityManager m, GameObject o, UserData d) {
                /**
                 * Create body
                 */
                this.b = m.getWorld().createBody(getBodyDef(null));

                /**
                 * Set fixture
                 */
                EdgeShape shape = new EdgeShape();
                shape.set(v1, new Vector2(dim.w, dim.h));

                Fixture f = b.createFixture(shape, 70);
                f.setRestitution(0);
                b.setUserData(d);
                b.setSleepingAllowed(true);

                shape.dispose();
        }