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c++ros

How to create a geometry_msgs::Point?

I'm using ROS melodic.

This is not a robot problem, it is a C++ problem.

I'm trying this C++ code:

#include "ros/ros.h"
#include "geometry_msgs/Point.h"
#include "geometry_msgs/Twist.h"
#include "geometry_msgs/Quaternion.h"
#include "tf/transform_datatypes.h"
#include "tf/LinearMath/Matrix3x3.h"
#include "nav_msgs/Odometry.h"

#include <sstream>
#include <cmath>
#include <cstdlib>
#include <queue>

// ... More code

geometry_msgs::Point p;

But I get the following error message:

no instance of constructor "geometry_msgs::Point_<containerallocator>::Point_ [with ContainerAllocator=std::allocator<void>]" matches the argument list -- argument types are: (double, double)

This is Point.h header.

What am I doing wrong?

Solution

  • Check if you have added the geometry_msgs in your package.xml and CMakeLists.txt. If not then just add it.

    In package.xml add:

    <depend>geometry_msgs</depend>

    In CMakeLists.txt add:

    find_package(catkin REQUIRED COMPONENTS
  geometry_msgs
)

catkin_package(
  CATKIN_DEPENDS geometry_msgs
)