dummy subscriber for rqt visualization added

catkin_ws/src/ball_tracking/src/dummy_sub.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+import rospy
+from geometry_msgs.msg import Point
+
+def callback(data):
+    """Callback function that is called when a message is received on the /trigger topic."""
+    rospy.loginfo(f"Received point: (x: {data.x}, y: {data.y}, z: {data.z})")
+
+def listener():
+    """Sets up the subscriber node."""
+    # Initialize the node with the name 'point_subscriber'
+    rospy.init_node('PONG_PADDLES', anonymous=False)
+
+    # Subscribe to the '/trigger' topic with the callback function
+    rospy.Subscriber("/trigger", Point, callback)
+
+    # Keep the program alive until it is stopped with Ctrl+C
+    rospy.spin()
+
+if __name__ == '__main__':
+    try:
+        listener()
+    except rospy.ROSInterruptException:
+        pass
+