Steering concept

To use a transportation capability (modal type) an agent requires to implement the ISteeringCapable interface (e.g. ICarSteeringCapable, see figure below), which defines methods and properties that this agent must offer to be able to steer that Vehicle. Besides steering the vehicle the agent may also use some vehicles as a passenger (e.g. using the Ferry). The IPassengerCapable is implemented by the MultimodalAgent and informs the agent with a PassengerMessage about the current status of the drive. It may for instance notify the agent at every stop (e.g. FerryStation) so that the agent may decide to leave or stay on the ferry.

The ISteeringHandle is the interface for an agent to drive the vehicle. Every Vehicle has a specific steering handle and provides that to the agent on successful enter.

uml_car_steering

Adding new transportation modalities is supported by the MultimodalAgent if it complies with the steering concept (see below).

uml_multimodal_agent

IPassengerCapableNotify(passengerMessage:PassengerMessage) : voidIPositionablePassengerMessageGoalReached,NoDriver,TerminalStation,ISteeringCapableIWalkingCapablePreferredSpeed : double «get»WalkingSteeringHandleEnvironment : ISpatialGraphEnvironment «get»Route : Route «get» «set»GoalReached : bool «get»Velocity : double «get»Position : Position «get» «set»WalkingSteeringHandle(multimodalAgent:MultimodalAgent, accelerator:WalkingAccelerator, environment:ISpatialGraphEnvironment, position:Position)«virtual» Move() : voidLeaveVehicle(passengerCapable:IPassengerCapable) : boolISteeringHandle