AndEngine rotate all connected bodies

Question

I have created below hexagon structure in Andengine with Box2D physics engine. I want to rotate whole structure with respect to center when other ball collides with the structure using physics.

find reference image here : reference question

I tried weld joint and revolute joint with the bodies but it is not performing proper motion as required. All bodies are attached with weld joint and vertices have revolute joint with center body which is static like,

RevoluteJointDef revoluteJointDef1 = new RevoluteJointDef();
revoluteJointDef1.initialize(centerB, movingBody[i], centerB.getWorldCenter());
revoluteJointDef1.enableMotor = true;
revoluteJointDef1.motorSpeed = 0;
revoluteJointDef1.maxMotorTorque = 1f;
this.mPhysicsWorld.createJoint(revoluteJointDef1);

Is there any other way to perform smooth rotation of whole structure? Thanks.

Is there any way if i can add a big circle disc body and attach balls on top of it which will rotate all bodies? — Harry's Lab
Does your structure need to be made from multiple bodies, or could it be multiple fixtures on a single body? — iforce2d
I was constructing it with multiple bodies but if it is possible to detect individual fixtures on single body than it is fine. — Harry's Lab
The BeginContact callback gives you a b2Contact, from which you can get the two fixtures that began contacting. iforce2d.net/b2dtut/collision-callbacks — iforce2d

Harry's Lab Harry's Lab · Accepted Answer · 2015-01-27T08:45:58

Oh! i got solution by myself... I did the same thing as i mentioned in first comment my question where I attached balls on a big circle body like,

Body circleBody ... ;// having large radius
//for all balls arranged in hexagon structure
foreach BallBody b
{
WeldJointDef def = new WeldJointDef();
def.initialize(b, circleBody, b.getWorldCenter());
mPhysicsWorld.createJoint(def);
}

and got the rotation by having revolute joint of circleBody with center. Thanks who put their efforts.

AndEngine rotate all connected bodies

1 Answers