rviz画长方体框

#include <ros/ros.h>
#include <visualization_msgs/Marker.h>

int main(int argc, char** argv) {
   
   
  ros::init(argc, argv, "showline");
  ros::NodeHandle n;
  ros::Publisher marker_pub =
      n.advertise<visualization_msgs::Marker>("visualization_marker", 10);
  visualization_msgs::Marker line_list;

  line_list.header.frame_id = "box";
  line_list.lifetime = ros::Duration(0.5);
  line_list.ns = "lines";
  line_list.action = visualization_msgs::Marker::ADD;
  line_list.pose.orientation.w = 1.0;
  line_list.id = 2;
  line_li