Hello everyone,

I'm trying to create a camera controller for RViz, which will allow me to track a flying target while standing stationary in the /map frame.

I found this topic and decided to use the ViewController API.

I wrote the following code:

#include <ros/ros.h>
#include <rviz/display.h>
#include "rviz/common.h"
#include "rviz/properties/forwards.h"

#include <last_letter_msgs/SimStates.h>

#define UPDATE_RATE 30

rviz::ViewController * cameraControls;
ros::Subscriber sub;

/////////////////////////////////////
// Callback to point camera to UAV //
/////////////////////////////////////
void pointCamera(const last_letter_msgs::SimStates& state){
    float x = state.pose.position.x;
    float y = state.pose.position.y;
    float z = state.pose.position.z;
    cameraControls.lookat(x,y,z);
}

//////////////////
//Main function //
//////////////////
int main(int argc, char **argv)
{

    ros::init(argc, argv, "sceneControls");
    ros::NodeHandle n;

    sub = n.subscribe("states",1, pointCamera);

    ros::Duration(10).sleep(); //wait for other nodes to get raised
    ros::Rate spinner(UPDATE_RATE);

    spinner.sleep();
    cameraControls = VisualizationManager::getCurrentViewController;
    ROS_INFO("sceneControls up");

    while (ros::ok())
    {
        ros::spinOnce();
        spinner.sleep();

        if (isnan(uav.states.velocity.linear.x))
        {
            ROS_FATAL("State NAN detected on sceneControls!");
        }
    }

    return 0;

}

However, I get this error message on catkin_make:

In file included from /opt/ros/indigo/include/rviz/properties/status_property.h:32:0,
                 from /opt/ros/indigo/include/rviz/display.h:38,
                 from /home/george/catkin_ws/src/last_letter/last_letter/include/cameraController.hpp:2,
                 from /home/george/catkin_ws/src/last_letter/last_letter/src/cameraController.cpp:1:
/opt/ros/indigo/include/rviz/properties/property.h:34:19: fatal error: QObject: No such file or directory
 #include <QObject>
                   ^
compilation terminated.
make[2]: *** [last_letter/last_letter/CMakeFiles/cameraController.dir/src/cameraController.cpp.o] Error 1
make[1]: *** [last_letter/last_letter/CMakeFiles/cameraController.dir/all] Error 2
make: *** [all] Error 2

I'm running ROS Indigo on Ubuntu 14.04.2.

Thanks in advance!