示例#1
0
  /**
   * 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);
  }
示例#2
0
  @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);
    }
  }