Passing many arguments to the callback

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Hi,

I am using Ubuntu 16.04 and ROS lunar. I would like to pass several arguments to a callback using the subscriber. My code is :

float testeur=ps.getSignGlob();

ros::Subscriber sub_odometry = node.subscribe<nav_msgs::Odometry>(topic_root + "/odom", 0, boost::bind(ps.odo_callback, _1, pc,testeur, &pub_pc), ros::VoidConstPtr(),
  ros::TransportHints().tcpNoDelay());

The callback prototype is : void odo_callback(nav_msgs::OdometryConstPtr odo, ratslam::PosecellNetwork *pc, ros::Publisher * pub_pc, float testeur); I was getting this error :

error: invalid use of non-static member function
ros::Subscriber sub_odometry = node.subscribe<nav_msgs::Odometry>(topic_root + "/odom", 0, boost::bind(ps.odo_callback, _1, pc,&testeur, &pub_pc), ros::VoidConstPtr(),