Use Prismatic Joint in libgdx

0
votes

I trying to create a elevator. I use PrismaticJointDef but body A has same position of body B. How can define distance between two body? I also used DistanceJointDef but get same result. I want get such result like this video. https://www.youtube.com/watch?v=rzNjNBKYuGI

private void defineBodyA(){
    bodyDef.type = BodyDef.BodyType.DynamicBody;
    bodyDef.position.set(getX() + getWidth() / 2, getY() + getHeight() / 2);
    bodyA = world.createBody(bodyDef);
    PolygonShape shape = new PolygonShape();
    shape.setAsBox(getWidth() / 2, getHeight() / 2);
    fixtureDef.shape = shape;
    bodyA.createFixture(fixtureDef);
    bodyA.setLinearDamping(30f);
    shape.dispose();
}


private void defineBodyB{
    bodyDef.position.set(getX() + getWidth() / 2, (getY() + 80 / PPM);
    bodyDef.type = BodyDef.BodyType.StaticBody;
    bodyB = world.createBody(bodyDef);
    PolygonShape upOfElevator = new PolygonShape();
    upOfElevator.setAsBox(16f / PPM, 0.5f / PPM);
    fixtureDef.shape = upOfElevator;
    bodyB.createFixture(fixtureDef);
    upOfElevator.dispose();
}

PrismaticJointDef prismaticJointDef = new PrismaticJointDef();
    prismaticJointDef.bodyA = bodyA;
    prismaticJointDef.bodyB = bodyB;
    world.createJoint(prismaticJointDef);

DistanceJointDef distanceJointDef = new DistanceJointDef();
    distanceJointDef.bodyA = bodyA;
    distanceJointDef.bodyB = bodyB;
    distanceJointDef.length = 100 / PPM;
    world.createJoint(distanceJointDef);
1
libgdxbox2d

1 Answers