public void setPhysicsRotation(Quaternion rotation) {
        gObject.getWorldTransform(tempTrans);
        Converter.convert(rotation, tempTrans.basis);
        gObject.setWorldTransform(tempTrans);
    }
Sets the physics object rotation
@param rotation the rotation of the actual physics object
jme3-jbullet/src/main/java/com/jme3/bullet/objects/PhysicsGhostObject.java