/** * Create a new paddle. * * @param world The world the paddle will be added to. * @param y The height of the paddle (starts centered on the x) * @param mode The keys that will move this paddle */ public Paddle(World world, int y, MovementMode mode) { Mode = mode; // Respond to the keyboard KeyboardFocusManager manager = KeyboardFocusManager.getCurrentKeyboardFocusManager(); manager.addKeyEventDispatcher(this); // Add the physics body BodyDef bd = new BodyDef(); bd.type = BodyType.DYNAMIC; bd.position.set(world.Bounds.width / 2, y); bd.linearDamping = 0.0f; bd.angularDamping = 0.01f; FixtureDef fd = new FixtureDef(); fd.shape = new PolygonShape(); ((PolygonShape) fd.shape).setAsBox(SIZE.width / 2, SIZE.height / 2); fd.density = 0.1f; fd.friction = 0.0f; fd.restitution = 1.0f; j2dBody = world.j2dWorld.createBody(bd); j2dBody.createFixture(fd); j2dBody.setUserData(this); // Limit it to only x movement BodyDef gbd = new BodyDef(); gbd.type = BodyType.STATIC; bd.position.set(world.Bounds.width / 2, y); PrismaticJointDef pjd = new PrismaticJointDef(); pjd.collideConnected = true; pjd.initialize( j2dBody, world.j2dWorld.createBody(gbd), j2dBody.getWorldCenter(), new Vec2(1.0f, 0.0f)); world.j2dWorld.createJoint(pjd); }
@Override public void initTest(boolean argDeserialized) { Body ground = null; { BodyDef bd = new BodyDef(); ground = getWorld().createBody(bd); EdgeShape shape = new EdgeShape(); shape.set(new Vec2(50.0f, 0.0f), new Vec2(-50.0f, 0.0f)); ground.createFixture(shape, 0.0f); } { CircleShape circle1 = new CircleShape(); circle1.m_radius = 1.0f; PolygonShape box = new PolygonShape(); box.setAsBox(0.5f, 5.0f); CircleShape circle2 = new CircleShape(); circle2.m_radius = 2.0f; BodyDef bd1 = new BodyDef(); bd1.type = BodyType.STATIC; bd1.position.set(10.0f, 9.0f); Body body1 = m_world.createBody(bd1); body1.createFixture(circle1, 5.0f); BodyDef bd2 = new BodyDef(); bd2.type = BodyType.DYNAMIC; bd2.position.set(10.0f, 8.0f); Body body2 = m_world.createBody(bd2); body2.createFixture(box, 5.0f); BodyDef bd3 = new BodyDef(); bd3.type = BodyType.DYNAMIC; bd3.position.set(10.0f, 6.0f); Body body3 = m_world.createBody(bd3); body3.createFixture(circle2, 5.0f); RevoluteJointDef jd1 = new RevoluteJointDef(); jd1.initialize(body2, body1, bd1.position); Joint joint1 = m_world.createJoint(jd1); RevoluteJointDef jd2 = new RevoluteJointDef(); jd2.initialize(body2, body3, bd3.position); Joint joint2 = m_world.createJoint(jd2); GearJointDef jd4 = new GearJointDef(); jd4.bodyA = body1; jd4.bodyB = body3; jd4.joint1 = joint1; jd4.joint2 = joint2; jd4.ratio = circle2.m_radius / circle1.m_radius; m_world.createJoint(jd4); } { CircleShape circle1 = new CircleShape(); circle1.m_radius = 1.0f; CircleShape circle2 = new CircleShape(); circle2.m_radius = 2.0f; PolygonShape box = new PolygonShape(); box.setAsBox(0.5f, 5.0f); BodyDef bd1 = new BodyDef(); bd1.type = BodyType.DYNAMIC; bd1.position.set(-3.0f, 12.0f); Body body1 = m_world.createBody(bd1); body1.createFixture(circle1, 5.0f); RevoluteJointDef jd1 = new RevoluteJointDef(); jd1.bodyA = ground; jd1.bodyB = body1; ground.getLocalPointToOut(bd1.position, jd1.localAnchorA); body1.getLocalPointToOut(bd1.position, jd1.localAnchorB); jd1.referenceAngle = body1.getAngle() - ground.getAngle(); m_joint1 = (RevoluteJoint) m_world.createJoint(jd1); BodyDef bd2 = new BodyDef(); bd2.type = BodyType.DYNAMIC; bd2.position.set(0.0f, 12.0f); Body body2 = m_world.createBody(bd2); body2.createFixture(circle2, 5.0f); RevoluteJointDef jd2 = new RevoluteJointDef(); jd2.initialize(ground, body2, bd2.position); m_joint2 = (RevoluteJoint) m_world.createJoint(jd2); BodyDef bd3 = new BodyDef(); bd3.type = BodyType.DYNAMIC; bd3.position.set(2.5f, 12.0f); Body body3 = m_world.createBody(bd3); body3.createFixture(box, 5.0f); PrismaticJointDef jd3 = new PrismaticJointDef(); jd3.initialize(ground, body3, bd3.position, new Vec2(0.0f, 1.0f)); jd3.lowerTranslation = -5.0f; jd3.upperTranslation = 5.0f; jd3.enableLimit = true; m_joint3 = (PrismaticJoint) m_world.createJoint(jd3); GearJointDef jd4 = new GearJointDef(); jd4.bodyA = body1; jd4.bodyB = body2; jd4.joint1 = m_joint1; jd4.joint2 = m_joint2; jd4.ratio = circle2.m_radius / circle1.m_radius; m_joint4 = (GearJoint) m_world.createJoint(jd4); GearJointDef jd5 = new GearJointDef(); jd5.bodyA = body2; jd5.bodyB = body3; jd5.joint1 = m_joint2; jd5.joint2 = m_joint3; jd5.ratio = 1f / circle2.m_radius; m_joint5 = (GearJoint) m_world.createJoint(jd5); } }