c++ - Print 3D coordinates of the selected point inside PCL visualizer -


i trying print 3d coordinates of selected point using pcl. below code:

#include <iostream> #include <pcl/io/io.h> #include <pcl/io/pcd_io.h> #include <pcl/visualization/pcl_visualizer.h>  using namespace std;  void pointpickingeventoccurred (const pcl::visualization::pointpickingevent& event, void* viewer_void) {   std::cout << "[inof] point picking event occurred." << std::endl;    float x, y, z;   if (event.getpointindex () == -1)   {      return;   }   event.getpoint(x, y, z);   std::cout << "[inof] point coordinate ( " << x << ", " << y << ", " << z << ")" << std::endl; }  int main (int argc, char** argv) {     pcl::visualization::pclvisualizer viewer("cloud viewer");     pcl::pointcloud<pcl::pointxyzrgba>::ptr body (new pcl::pointcloud<pcl::pointxyzrgba>);     pcl::io::loadpcdfile ("body.pcd", *body);     viewer.addpointcloud (body,"body");     viewer.registerpointpickingcallback (pointpickingeventoccurred, (void*)&viewer);     viewer.spin();     return 0; }

the code compiles without error doesn't print information in termainal. what's wrong here?

try holding down shift while left-clicking pick point.


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