aruco_map: possibility to publish static transforms for map's markers

aruco_pose/src/aruco_map.cpp

@@ -27,6 +27,7 @@
 #include <tf2_ros/buffer.h>
 #include <tf2_ros/transform_listener.h>
 #include <tf2_ros/transform_broadcaster.h>
+#include <tf2_ros/static_transform_broadcaster.h>
 #include <tf2_geometry_msgs/tf2_geometry_msgs.h>
 #include <message_filters/subscriber.h>
 #include <message_filters/synchronizer.h>
@@ -68,11 +69,13 @@ private:
 	Mat camera_matrix_, dist_coeffs_;
 	geometry_msgs::TransformStamped transform_;
 	geometry_msgs::PoseWithCovarianceStamped pose_;
+	vector<geometry_msgs::TransformStamped> markers_transforms_;
 	tf2_ros::TransformBroadcaster br_;
+	tf2_ros::StaticTransformBroadcaster static_br_;
 	tf2_ros::Buffer tf_buffer_;
 	tf2_ros::TransformListener tf_listener_{tf_buffer_};
 	visualization_msgs::MarkerArray vis_array_;
-	std::string known_tilt_;
+	std::string known_tilt_, map_, markers_frame_, markers_parent_frame_;
 	int image_width_, image_height_, image_margin_;
 	bool auto_flip_;
 
@@ -125,6 +128,7 @@ public:
 		sync_.reset(new message_filters::Synchronizer<SyncPolicy>(SyncPolicy(10), image_sub_, info_sub_, markers_sub_));
 		sync_->registerCallback(boost::bind(&ArucoMap::callback, this, _1, _2, _3));
 
+		publishMarkersFrames();
 		publishMapImage();
 		vis_markers_pub_.publish(vis_array_);
 
@@ -422,6 +426,15 @@ publish_debug:
 		board_->ids.push_back(id);
 		board_->objPoints.push_back(obj_points);
 
+		// Add marker's static transform
+		if (!markers_frame_.empty()) {
+			geometry_msgs::TransformStamped marker_transform;
+			marker_transform.header.frame_id = markers_parent_frame_;
+			marker_transform.child_frame_id = markers_frame_ + std::to_string(id);
+			tf::transformTFToMsg(transform, marker_transform.transform);
+			markers_transforms_.push_back(marker_transform);
+		}
+
 		// Add visualization marker
 		visualization_msgs::Marker marker;
 		marker.header.frame_id = transform_.child_frame_id;
@@ -452,6 +465,13 @@ publish_debug:
 		// vis_array_.markers.at(0).points.push_back(p);
 	}
 
+	void publishMarkersFrames()
+	{
+		if (!markers_transforms_.empty()) {
+			static_br_.sendTransform(markers_transforms_);
+		}
+	}
+
 	void publishMapImage()
 	{
 		cv::Size size(image_width_, image_height_);

aruco_pose/test/basic.py

@@ -78,6 +78,25 @@ def test_markers_frames(node, tf_buffer):
     assert marker_2.transform.rotation.z == approx(-0.107390951553)
     assert marker_2.transform.rotation.w == approx(0.0201999263402)
 
+def test_map_markers_frames(node, tf_buffer):
+    stamp = rospy.get_rostime()
+    timeout = rospy.Duration(5)
+
+    marker_1 = tf_buffer.lookup_transform('aruco_map', 'aruco_map_1', stamp, timeout)
+    assert marker_1.transform.translation.x == approx(0)
+    assert marker_1.transform.translation.y == approx(0)
+    assert marker_1.transform.translation.z == approx(0)
+
+    marker_4 = tf_buffer.lookup_transform('aruco_map', 'aruco_map_4', stamp, timeout)
+    assert marker_4.transform.translation.x == approx(1)
+    assert marker_4.transform.translation.y == approx(1)
+    assert marker_4.transform.translation.z == approx(0)
+
+    marker_12 = tf_buffer.lookup_transform('aruco_map', 'aruco_map_12', stamp, timeout)
+    assert marker_12.transform.translation.x == approx(0.2)
+    assert marker_12.transform.translation.y == approx(0.5)
+    assert marker_12.transform.translation.z == approx(0)
+
 def test_visualization(node):
     vis = rospy.wait_for_message('aruco_detect/visualization', VisMarkerArray, timeout=5)
     assert len(vis.markers) == 9

aruco_pose/test/basic.test

@@ -22,6 +22,8 @@
         <remap from="markers" to="aruco_detect/markers"/>
         <param name="type" value="map"/>
         <param name="map" value="$(find aruco_pose)/test/basic.txt"/>
+        <param name="markers/frame_id" value="aruco_map"/>
+        <param name="markers/child_frame_id_prefix" value="aruco_map_"/>
     </node>
 
     <param name="test_module" value="$(find aruco_pose)/test/basic.py"/>

clever/launch/aruco.launch

@@ -24,6 +24,8 @@
         <param name="known_tilt" value="map"/>
         <param name="frame_id" value="aruco_map_detected" if="$(arg aruco_vpe)"/>
         <param name="frame_id" value="aruco_map" unless="$(arg aruco_vpe)"/>
+        <param name="markers/frame_id" value="aruco_map"/>
+        <param name="markers/child_frame_id_prefix" value="aruco_map_"/>
     </node>
 
     <!-- vpe publisher from aruco markers -->