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StepPositionData_msg

 int16       moving_foot
 int16       LFootMove = 1 # Left foot constant
 int16       RFootMove = 2 # Right foot constant
 int16       NFootMove = 3 # No foot constant

 ### Unit [meter, rad]
 float32     foot_z_swap
 float32     body_z_swap
 float32     torso_yaw_angle_rad
 PoseXYZRPY  left_foot_pose
 PoseXYZRPY  right_foot_pose
 PoseZRPY    body_pose

foot_z_wap

body_z_wap