HamsterAPICPP

From cogniteam
Revision as of 10:21, 28 February 2017 by Cogniteam (talk | contribs)
Jump to: navigation, search


HamsterAPI Class Documentation

Hamster class File Description All methods below belong to the namespace HamsterAPI:: and are a part of the Hamster class HamsterAPIClientCPP/Hamster.h The hamster class is the main interface to the Hamster robot.



Method Name Constructor: Hamster(const AgentID & agent_id, HamsterClientParameters params = HamsterClientParameters())
Method Description

The client parameters contain the following:

  • base_address:
  • The network base address to work with
- if the address is 127.0.0 then the connection will always go to loopback
- Otherwise it will go to base_adress.agent_id
- For example : base_address = 10.0.2 agent_id = 1 so it will connect to 10.0.2.1:port
  • port - The port to connect on
Return values Possible Errors (HamsterError)


Method Name Image getCameraImage() const
Method Description
  • Retrieves the camera image from the hamster
  • Buffer Size - 1
Return values Image
Possible Errors (HamsterError)
  • Empty Buffer
  • Connection Issue
Method Name Pose getPose()const
Method Description
  • Retrieves the global pose of the hamster.
  • The global pose is associated with the SLAM part of the hamster.
  • Buffer Size - 1.
Return values
  • Global Pose
Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


Method Name IMU getIMU()const
Method Description
  • Retrieves the IMU information from the hamster if an IMU exists.
  • Buffer Size - 1.
Return values IMU
Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.
Method Name GPS getGPS()const
Method Description
  • Retrieves the GPS information from the hamster is a GPS exists.
  • Buffer Size - 1.
Return values GPS
Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.
Method Name LidarScan getLidarScan()const
Method Description

Retrieves the 360 degree lidar scan from the hamster. Buffer Size - 1.

Return values

LidarScan

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


Method Name

ColoredScan getColoredScan()const

Method Description

Retrieves a ColoredScan. ColoredScan is a combination of the hamster lidar and camera synchronized. It contains the raw lidar scan and the associated pixels RGB color of the image. Buffer Size - 1

Return values

ColoredScan

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


 


Method Name Speed getSpeed()const
Method Description

Retrieves the current speed of the hamster. The is usually the speed given by the latest speed command or from the wandering / navigation. Buffer Size - 1.

Return values

Speed

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


Method Name

HamsterMode getHamsterMode()const

Method Description

Retrieves the current mode of the hamster. The available modes are:

  • Localization.
  • Mapping.

Buffer Size - 1.

Return values

HamsterMode

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


 


Method Name

OccupancyGrid getSLAMMap()const

Method Description

Retrieves the current SLAM map that was loaded or created by the hamster as an occupancy grid. Buffer Size - 1.

Return values

OccupancyGrid

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


Method Name

HamsterConnections getConnectedHamsters()const

Method Description

Retrieves the currently living hamsters on the network. Meaning that for example there are 3 hamsters on the same network {agent1, agent2, agent3}. If the current hamster got an heartbeat from all the others, there will be 3 connections on the list. Buffer Size - 1.

Return values

HamsterConnections

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.

 


Method Name

BatteryState getBatteryState()const

Method Description

Retrieves the current battery state of the hamster. Buffer Size - 1.

Return values

BatteryState

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.



Method Name

NetworkState getNetworkState()const

Method Description

Retrieves the current network state of the hamster with the network. Buffer Size - 1.

Return values

NetworkState

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


 


Method Name

NavigationState getNavigationState()const

Method Description

Retrieves the navigation state of the hamster. The navigation state depends whether there was a goal request or not. There are four types of states:

  • Offline.
  • In Progress.
  • Reached Goal.
  • Failure.

Buffer Size - 1.

Return values

NavigationState

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


Method Name

void sendSpeed(float velocity, float wheels_angle)

Method Description
  • Sends a speed request to the hamster.
  • If there is an active goal, the speed request will be ignored and an HamsterError will be thrown.
* This method is based on ackermann speed.
Return values
Possible Errors (HamsterError)
  • Connection Issue.
  • Running Goal.

 


Method Name

void sendOccupancyGrid(const OccupancyGrid & grid)

Method Description

Sends an Occupancy Grid to the server to be published. Can be viewed via RViz.

Return values
Possible Errors (HamsterError)
  • Connection issue



Method Name

void switchMode(const HamsterMode & mode)

Method Description

Switches hamster mode to one of the following:

  • Mapping.
  • Localization.
Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name void navigateTo(const Goal & goal)
Method Description
  • Navigates to a given goal.
  • The goal can be either local goal or global goal.
Return values
Possible Errors (HamsterError)
  • Connection Issue.


 


Method Name void navigateTo(float distance, float angle)
Method Description

Navigates to a given distance and angle. This is simillar to giving a local goal with distance and angle calculated to X and Y.

Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name

void setInitialPose(const Pose & pose)

Method Description
  • Sets the initial position of the agent on the global map.
  • This is useful for a starting 0,0 position for mapping or if an agent needs to reposition to a starting position.
Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name void stopNavigation()
Method Description Stops the navigation if there is an active goal.
Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name AgentID getAgentID()const
Method Description Getter for the current Agent ID.
Return values AgentID
Possible Errors (HamsterError)
Method Name

float getLidarResolution()const

Method Description

Getter for the lidar resolution

Return values float
Possible Errors (HamsterError)


Method Name bool isConnected()const
Method Description
  • Checks whether the client is still connected to the server.
  • A connection problem can arise from heartbeat failure or from FIN from the server side.
Return values

bool

Possible Errors (HamsterError)

 


Method Name void cleanBuffers()
Method Description
  • Cleans all the buffers for all the messages (this includes the text messages).
Return values
Possible Errors (HamsterError)
Method Name
  • void sendDataMessage(const AgentID & target_agent_id, const std::string & message)
  • void sendDataMessage(const DataMessage & message)
Method Description

Sends a data message to another hamster. This will be published on the network with the current agent id and the target agent id. If the target is in the network, it will receive it. The following API can be used for messages:

  • hasDataMessages().
  • getLatestDataMessage().
  • getLatestDataMessages(Amount)
  • getDataMessagesAmount().
  • clearDataMessagesBuffer().
  • setDataMessageBufferSize(Amount).
  • getDataMessageBufferSize().
  • sendDataMessage(Agent, DataMessage). -sendBroadcastDataMessage(DataMessage).
Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name
  • void sendBroadcastDataMessage(const DataMessage & message)
  • void sendBroadcastDataMessage(const std::string & message)
Method Description

Sends a data message to all the hamsters on the network. Every hamster that see's the message will pick it up. The following API can be used for messages:

  • hasDataMessages().
  • getLatestDataMessage().
  • getLatestDataMessages(Amount).
  • getDataMessagesAmount().
  • clearDataMessagesBuffer().
  • setDataMessageBufferSize(Amount).
  • getDataMessageBufferSize().
  • sendDataMessage(Agent, DataMessage).
  • sendBroadcastDataMessage(DataMessage)
Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name
  • DataMessage getLatestDataMessage()const std::vector<DataMessage> getLatestDataMessages(uint32_t amount)const
  • DataMessage popLatestDataMessage() std::vector<DataMessage> popLatestDataMessages(uint32_t amount)
Method Description

Gets/Pops the data messages that were received from the other agents. Will try to get the max possible messages untill the given amount. The following API can be used for messages:

  • hasDataMessages().
  • getLatestDataMessage().
  • getLatestDataMessages(Amount).
  • getDataMessagesAmount().
  • clearDataMessagesBuffer().
  • setDataMessageBufferSize(Amount).
  • getDataMessageBufferSize().
  • sendDataMessage(Agent, DataMessage).
  • sendBroadcastDataMessage(DataMessage).

Buffer Size - Determined by setDataMessageBufferSize, Defaults to 1000.

Return values

DataMessage, std::vector<DataMessage>

Possible Errors (HamsterError)
  • Empty Buffer.
  • Connection Issue.


Method Name

bool hasDataMessages()const

Method Description

Checks whether there are any messages. The following API can be used for messages: - hasDataMessages(). - getLatestDataMessage(). - getLatestDataMessages(Amount). - getDataMessagesAmount(). - clearDataMessagesBuffer(). - setDataMessageBufferSize(Amount). - getDataMessageBufferSize(). - sendDataMessage(Agent, DataMessage). -sendBroadcastDataMessage(DataMessage).

Return values

bool

Possible Errors
Method Name

uint32_t getDataMessagesAmount()const

Method Description

Getter for the amount of data messages. The following API can be used for messages: - hasDataMessages(). - getLatestDataMessage(). - getLatestDataMessages(Amount). - getDataMessagesAmount(). - clearDataMessagesBuffer(). - setDataMessageBufferSize(Amount). - getDataMessageBufferSize(). - sendDataMessage(Agent, DataMessage). - sendBroadcastDataMessage(DataMessage)

Return values

uint32_t

Possible Errors (HamsterError)
Method Name

void clearDataMessagesBuffer()

Method Description

Cleans the data message buffer completely. The following API can be used for messages:

  • hasDataMessages().
  • getLatestDataMessage().
  • getLatestDataMessages(Amount).
  • getDataMessagesAmount().
  • clearDataMessagesBuffer().
  • setDataMessageBufferSize(Amount).
  • getDataMessageBufferSize().
  • sendDataMessage(Agent, DataMessage). - sendBroadcastDataMessage(DataMessage)
Return values

Possible Errors (HamsterError) ||

 


Method Name

void setDataMessageBufferSize(uint32_t amount)

Method Description

Setter for the size of the data message buffer. The following API can be used for messages:

  • hasDataMessages().
  • getLatestDataMessage().
  • getLatestDataMessages(Amount).
  • getDataMessagesAmount().
  • clearDataMessagesBuffer().
  • setDataMessageBufferSize(Amount).
  • getDataMessageBufferSize().
  • sendDataMessage(Agent, DataMessage). - sendBroadcastDataMessage(DataMessage)
Return values
Possible Errors (HamsterError)


Method Name

uint32_t getDataMessageBufferSize()const

Method Description

Getter for the size of the data message buffer.The following API can be used for messages:

  • hasDataMessages().
  • getLatestDataMessage().
  • getLatestDataMessages(Amount).
  • getDataMessagesAmount().
  • clearDataMessagesBuffer().
  • setDataMessageBufferSize(Amount).
  • getDataMessageBufferSize().
  • sendDataMessage(Agent, DataMessage). - sendBroadcastDataMessage(DataMessage)
Return values

uint32_t

Possible Errors (HamsterError)


 


Method Name

void reconnect()

Method Description

Tries to reconnect to the server.

Return values
Possible Errors (HamsterError)
  • Connection Issue.


Method Name void disconnect()
Method Description Disconnects from the server.
Return values
Possible Errors (HamsterError)

 


 

Retrieved from "http://wiki.cognimbus.com/index.php?title=HamsterAPICPP&oldid=250"