在libgdx Box2d中创建一个绳索

Question

您好我正在使用box2d phisyics引擎在libgdx中开发游戏。 我只是试图创建一根绳子，绳子在某些情况下工作正常，但在某些情况下我的所有关节都搞乱了，我只是无法解决这个问题，我尝试了一切。

这是我创建绳索的方式：

  private Body[] createRope(int lengh, int index) {

    if(bdRopesPoints == null)
    createPointsRope();

    Body[] segments = new Body[lengh];
    RevoluteJoint[] joints = new RevoluteJoint[lengh - 1];
    RopeJoint[] ropeJoints = new RopeJoint[lengh + 1];
    RopeJoint[] ropeJoints2 = new RopeJoint[3];
    Texture tex;
    int random = (int )(Math.random() * 2 + 1);
    if(level != 5){
        if(random == 1){
             tex = game.manager.get("images/rope.png");
        } else {
            tex = game.manager.get("images/rope2.png");
        }
    } else {
        tex = game.manager.get("images/firerope.png");
    }

    BodyDef bd = new BodyDef();

    bd.type = BodyType.DynamicBody;
    bd.position.set(bdRopesPoints.get(index + 1).getBody().getPosition());

    float width = 0.15f, height = 0.55f;
    PolygonShape ps = new PolygonShape();

    FixtureDef fdeff = new FixtureDef();
    fdeff.shape = ps;
    fdeff.density = 20;
    fdeff.friction = 1;
     fdeff.restitution = 0;
    fdeff.filter.categoryBits = B2DVars.BIT_ROPE;
    fdeff.filter.maskBits =  B2DVars.BIT_PLAYER | B2DVars.BIT_BALLS | B2DVars.BIT_ENEMY;

    ps.setAsBox(width / 2, height / 2);

    for (int i = 0; i < segments.length; i++) {
        segments[i] = world.createBody(bd);
        if(level != 5)
            segments[i].createFixture(fdeff).setUserData("rope");
        else {
            if(i % 2 == 1){
                segments[i].createFixture(fdeff).setUserData("ropefire");
            } else {
                segments[i].createFixture(fdeff).setUserData("rope");
            }
        }

        Rock c = new Rock(segments[i]);
        if(random == 1)
        c.spr.setScale(0.3f, 0.55f);
        else
            c.spr.setScale(0.2f, 0.55f);
        c.spr.setRotation(190);
        c.spr.setTexture(tex);

        bdRopesPoints.add(c);

    }

    RevoluteJointDef jointdef = new RevoluteJointDef();
    jointdef.localAnchorA.y = -height / 3;
    jointdef.localAnchorB.y = height / 3;
    for (int i = 0; i < joints.length; i++) {


        if (i == 0) {
            jointdef.bodyA = bdRopesPoints.get(index + 1).getBody();
            jointdef.bodyB = segments[0];
        } else if (i < joints.length - 1) {
            jointdef.bodyA = segments[i - 1];
            jointdef.bodyB = segments[i];
        } else if (i == joints.length - 1) {
            //System.out.println(i);
            jointdef.bodyA = segments[i];
            jointdef.bodyB = bdRopesPoints.get(index).getBody();
        }

        // jointdef.bodyA = segments[i + 1];
        // jointdef.bodyB = segments[i];

        joints[i] = (RevoluteJoint) world.createJoint(jointdef);
    }




    RopeJointDef ropeDef = new RopeJointDef();
    ropeDef.localAnchorA.set(0, -height / 3);
    ropeDef.localAnchorB.set(0, height / 3);
    ropeDef.maxLength = height - 0.2f;

    for (int i = 0; i < ropeJoints.length; i++) {


        if (i == 0) {
            ropeDef.bodyA = bdRopesPoints.get(index + 1).getBody();
            ropeDef.bodyB = segments[0];
        } else if (i < joints.length - 1) {
            ropeDef.bodyA = segments[i];
            ropeDef.bodyB = segments[i + 1];
        } else if (i == joints.length - 1) {
            ropeDef.bodyA = segments[i];
            ropeDef.bodyB = bdRopesPoints.get(index).getBody();
        }

  //            ropeDef.bodyA = segments[i];
  //            ropeDef.bodyB = segments[i + 1];

        ropeJoints[i] = (RopeJoint) world.createJoint(ropeDef);
    }




    return segments;
}

是否有一些更好的关节来制作我没有使用过的绳索？请帮助我迷路。