- u -
- UNKNOWN_PIXEL_FORMAT : ignition::msgs
- UserCmd_Type_MOVING : ignition::msgs
- UserCmd_Type_SCALING : ignition::msgs
- UserCmd_Type_UserCmd_Type_INT_MAX_SENTINEL_DO_NOT_USE_ : ignition::msgs
- UserCmd_Type_UserCmd_Type_INT_MIN_SENTINEL_DO_NOT_USE_ : ignition::msgs
- UserCmd_Type_WORLD_CONTROL : ignition::msgs
- UserCmd_Type_WRENCH : ignition::msgs