ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
1 | initial version |
Any single tf message is only a part of the state of the system. To know the state of the system you need to aggregate tf messages over time. You can do this on a bag file without playing back the messages by using the rosbag code API. But it is likely that you will still want to use the tf libraries which are designed to accumulate the messages and be queryable.