[ros-users] robot_state_publisher with joint_states in different messages does not compute tf for all joints
Florian.Weisshardt at ipa.fraunhofer.de
Mon Nov 22 12:44:29 UTC 2010
Dear ros users,
probably we figured out a bug in the robot_state_publisher (or are not using it correctly):
We are running a robot_state_publisher subscribed to the /joint_states topic and using a urdf robot_description. The transformation from joint_states with urdf to tf transformations works only if
a) the joint information for the whole kinematic chain is published in one joint_states message or
b) at least there are no joints connected to a serial chain and published in different joint_states messages.
In our case e.g. there is a gripper attached to an arm. Both have rotary joints defined and are publishing joint_states in two different joint_states messages, but tf can only be computed for the arm, not for the gripper.
Is this a known behaviour (bug?) or are we missing something?
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