# Bounded frontier_exploration using code rather than rviz point tool

The code below should define a polyStamped name "boundary" that includes points p1, p2, p3, and p4. Here is my code:

```
int main(int argc, char** argv)
{
ros::init(argc, argv, "send_exploration_goal");
Cient client("explore_server", true);
client.waitForServer();
frontier_exploration::ExploreTaskGoal goal;
geometry_msgs::PolygonStamped boundary;
geometry_msgs::Point32 p1, p2, p3, p4;
p1.x = 2.0; p1.y = 2.0; p1.z = 0.0;
p2.x = 2.0; p2.y = -2.0; p2.z = 0.0;
p3.x = -2.0; p3.y = -2.0; p3.z = 0.0;
p4.x = -2.0; p4.y = 2.0; p4.z = 0.0;
// defining the boundary polygon here
boundary.header.seq = 1;
boundary.header.stamp = ros::Time::now();
boundary.header.frame_id = "map";
boundary.polygon.points.reserve(4);
boundary.polygon.points[0] = p1;
boundary.polygon.points[1] = p2;
boundary.polygon.points[2] = p3;
boundary.polygon.points[3] = p4;
// defining the explore center here
geometry_msgs::PointStamped start_point;
start_point.point.x = 0.0; start_point.point.y = 0.0; start_point.point.z = 0.0;
goal.explore_center = start_point;
goal.explore_boundary = boundary;
client.sendGoal(goal);
}
```

When I "cout << boundary", the polygon.points[] shows up empty. How do you correctly define the points of a polygon Stamped?