function restartCurrentScene(){
        var N = bodies.length;
        for(var i=0; i<N; i++){
            var b = bodies[i];
            b.position.copy(b.initPosition);
            b.velocity.copy(b.initVelocity);
            if(b.initAngularVelocity){
                b.angularVelocity.copy(b.initAngularVelocity);
                b.quaternion.copy(b.initQuaternion);
            }
        }
    }
Restarts the current scene
@method restartCurrentScene