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originally i planned that the audience interacts indirectly with the game members by throwing some bengalos or other stuff into the field to block the player's vehicle. but now the options emotional, peaceful, off and aggro determine the sound environment. 
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I have a cylinder object with its rigidBody on a plane. I want to move this object without physics. But the object seems to locked by its rigidBody.One way is to use a Kinematic rigidbody: more here
//PSEUDO CODE:
float rigidbodyMass = 0;
//...some operations to create the rigidbody and assign the rigidbodyMass to it (I guess you know how to do that)
rigidbody.setCollisionFlags(carCollider.getCollisionFlags()|CollisionFlags.KINEMATIC_OBJECT);
rigidbody.setActivationState(CollisionObject.DISABLE_DEACTIVATION);
dynamicWorld.addRigidBody(rigidbody);
According to the requirement of my program, this object is upside down when it moves.(Fliped) But when I drop it, the object upside down again.(Not Fliped) It is not correct. And I can not find out any functions to set the initial rotation of the new rigidBody. Is this problem have any solutions?Honestly, I don't get the whole problem. But keep in mind that there is a difference according to the world axes of jPCT, jBullet and for example 3DS-Max. I've attached an image that should explain the difference.
, but after a time you get familiar with it.