description {
@brief An array of actuators

The actuator array interface provides access to an array of actuators.
}

message { REQ, POWER, 1, player_actarray_power_config_t };
message { REQ, BRAKES, 2, player_actarray_brakes_config_t };
message { REQ, GET_GEOM, 3, player_actarray_geom_t };
message { REQ, SPEED, 4, player_actarray_speed_config_t };
message { REQ, ACCEL, 5, player_actarray_accel_config_t };

message { CMD, POS, 1, player_actarray_position_cmd_t };
message { CMD, MULTI_POS, 2, player_actarray_multi_position_cmd_t };
message { CMD, SPEED, 3, player_actarray_speed_cmd_t };
message { CMD, MULTI_SPEED, 4, player_actarray_multi_speed_cmd_t };
message { CMD, HOME, 5, player_actarray_home_cmd_t };
message { CMD, CURRENT, 6, player_actarray_current_cmd_t };
message { CMD, MULTI_CURRENT, 7, player_actarray_multi_current_cmd_t };

message { DATA, STATE, 1, player_actarray_data_t };


/** Idle state code */
#define PLAYER_ACTARRAY_ACTSTATE_IDLE     1
/** Moving state code */
#define PLAYER_ACTARRAY_ACTSTATE_MOVING   2
/** Braked state code */
#define PLAYER_ACTARRAY_ACTSTATE_BRAKED   4
/** Stalled state code */
#define PLAYER_ACTARRAY_ACTSTATE_STALLED  8

/** Linear type code */
#define PLAYER_ACTARRAY_TYPE_LINEAR       1
/** Rotary type code */
#define PLAYER_ACTARRAY_TYPE_ROTARY       2


/** @brief Structure containing a single actuator's information */
typedef struct player_actarray_actuator
{
  /** The position of the actuator in m or rad depending on the type. */
  float position;
  /** The speed of the actuator in m/s or rad/s depending on the type. */
  float speed;
  /** The acceleration of the actuator in m/s^2 or rad/s^2 depending on the type. */
  float acceleration;
  /** The current of the actuator in A. */
  float current;
  /** The current state of the actuator. */
  uint8_t state;
} player_actarray_actuator_t;

/** @brief Data: state (@ref PLAYER_ACTARRAY_DATA_STATE)

The actuator array data packet. */
typedef struct player_actarray_data
{
  /** The number of actuators in the array. */
  uint32_t actuators_count;
  /** The actuator data. */
  player_actarray_actuator_t *actuators;
  /** power state */
  uint8_t motor_state;
} player_actarray_data_t;

/** @brief Actuator geometry */
typedef struct player_actarray_actuatorgeom
{
  /** The type of the actuator - linear or rotary. */
  uint8_t type;
  /** The length of this actuator's link to the next actuator. For linear
  actuators, this should be its length when at 0 position. */
  float length;
  /** The orientation of this actuator when it is in its rest position. When
  combined with the length of the actuator's link, this will give the position
  in space of the next actuator in the array in the coordinate space of this
  actuator (i.e., it is the direction to the next actuator). */
  player_orientation_3d_t orientation;
  /** The axis of rotation for this actuator if it is rotary, or axis along
  which it moves if it is linear. In both cases, it is a vector. */
  player_point_3d_t axis;
  /** The range of motion of the actuator, in m or rad depending on the type. */
  float min;
  /** The range of motion of the actuator, in m or rad depending on the type. */
  float centre;
  /** The range of motion of the actuator, in m or rad depending on the type. */
  float max;
  /** The range of motion of the actuator, in m or rad depending on the type. */
  float home;
  /** The configured speed setting of the actuator - different from current speed. */
  float config_speed;
  /** If the actuator has brakes or not. */
  uint8_t hasbrakes;
} player_actarray_actuatorgeom_t;

/** @brief Request/reply: get geometry

Send a null @ref PLAYER_ACTARRAY_REQ_GET_GEOM request to receive the geometry in
this form. */
typedef struct player_actarray_geom
{
  /** The number of actuators in the array. */
  uint32_t actuators_count;
  /** The geometry information for each actuator in the array. */
  player_actarray_actuatorgeom_t *actuators;
  /** The position of the base of the actarray. This should always be the
  position of the first actuator in the array. */
  player_point_3d_t base_pos;
  /** The orientation of the base of the actarray. This is distinct from the
  orientation of the first actuator in the array. */
  player_orientation_3d_t base_orientation;
} player_actarray_geom_t;


/** @brief Command: Joint position control (@ref PLAYER_ACTARRAY_CMD_POS)

Tells a joint/actuator to attempt to move to a requested position. */
typedef struct player_actarray_position_cmd
{
  /** The joint/actuator to command. */
  int32_t joint;
  /** The position to move to. */
  float position;
} player_actarray_position_cmd_t;

/** @brief Command: Multiple Joint position control (@ref PLAYER_ACTARRAY_CMD_MULTI_POS)

Tells all joints/actuators to attempt to move to the given positions. */
typedef struct player_actarray_multi_position_cmd
{
  /** The number of actuators in the array. */
  uint32_t positions_count;
  /** The positions for each joint/actuator. */
  float *positions;
} player_actarray_multi_position_cmd_t;

/** @brief Command: Joint speed control (@ref PLAYER_ACTARRAY_CMD_SPEED)

Tells a joint/actuator to attempt to move with the given speed. */
typedef struct player_actarray_speed_cmd
{
  /** The joint/actuator to command. */
  int32_t joint;
  /** The speed to move with. */
  float speed;
} player_actarray_speed_cmd_t;

/** @brief Command: Multiple Joint speed control (@ref PLAYER_ACTARRAY_CMD_MULTI_SPEED)

Tells all joints/actuators to attempt to move with the given velocities. */
typedef struct player_actarray_multi_speed_cmd
{
  /** The number of actuators in the array. */
  uint32_t speeds_count;
  /** The speed to move with. */
  float *speeds;
} player_actarray_multi_speed_cmd_t;

/** @brief Command: Joint home (@ref PLAYER_CMD_ACTARRAY_HOME)

Tells a joint/actuator (or the whole array) to go to home position. */
typedef struct player_actarray_home_cmd
{
  /** The joint/actuator to command - set to -1 to command all. */
  int32_t joint;
} player_actarray_home_cmd_t;

/** @brief Command: Joint current control (@ref PLAYER_ACTARRAY_CMD_CURRENT)

Tells a joint/actuator to attempt to move with the given current. */
typedef struct player_actarray_current_cmd
{
  /** The joint/actuator to command - set to -1 to command all. */
  int32_t joint;
  /** The current to move with. */
  float current;
} player_actarray_current_cmd_t;

/** @brief Command: Multiple Joint current control (@ref PLAYER_ACTARRAY_CMD_MULTI_CURRENT)

Tells all joints/actuators to attempt to move with the given current. */
typedef struct player_actarray_multi_current_cmd
{
  /** The number of actuators in the array. */
  uint32_t currents_count;
  /** The current for the motors of the whole array */
  float *currents;
} player_actarray_multi_current_cmd_t;




/** @brief Request/reply: Power.

Send a @ref PLAYER_ACTARRAY_REQ_POWER request to turn the power to all actuators
in the array on or off. Be careful when turning power on that the array is
not obstructed from its home position in case it moves to it (common
behaviour). Null response. */
typedef struct player_actarray_power_config
{
  /** Power setting; 0 for off, 1 for on. */
  uint8_t value;
} player_actarray_power_config_t;

/** @brief Request/reply: Brakes.

Send a @ref PLAYER_ACTARRAY_REQ_BRAKES request to turn the brakes of all
actuators in the array (that have them) on or off. Null response.*/
typedef struct player_actarray_brakes_config
{
  /** Brake setting; 0 for off, 1 for on. */
  uint8_t value;
} player_actarray_brakes_config_t;

/** @brief Request/reply: Speed.

Send a @ref PLAYER_ACTARRAY_REQ_SPEED request to set the speed of a joint for
all subsequent movements. Null response. */
typedef struct player_actarray_speed_config
{
  /** Joint to set speed for. */
  int32_t joint;
  /** Speed setting in m/s or rad/s. */
  float speed;
} player_actarray_speed_config_t;


/** @brief Request/reply: Acceleration.

Send a @ref PLAYER_ACTARRAY_REQ_ACCEL request to set the acceleration of a joint for
all subsequent movements. Null response. */
typedef struct player_actarray_accel_config
{
  /** Joint to set acceleration for. */
  int32_t joint;
  /** Acceleration setting in m/s^2 or rad/s^2. */
  float accel;
} player_actarray_accel_config_t;