Injects

Injects isn’t a real noun in plural form but used here as a term encompassing injectables and injections. The general idea is that you inject something to alter some parameter or behavior in the simulation at runtime. It’s typically used for creating situations in the simulation which are dynamically triggered, and not 100% certain that they’re going to take place at all, or at a certain point in time or location in the world (because if it were 100% certain they could just as well be part of the scenario).

Example injects

• triggering a pedestrian crossing the road 100 meters ahead of the ego vehicle
• triggering a fault, e.g. failure of an aircraft engine
• showing a distraction (a gorilla!) in the map of an operator HMI

Injectable

An injectable is a specification of something that can be injected. It has a name, description and some parameters defining how they’ll play out in time. An application that can inject something into the scenario should publish an injectable describing it. This is handled by the RTIInjectable component in Unity and RTIInjectableComponent in Unreal.

Injection

An injection is a specification of something that has been injected. It has a state, such as disabled, enabled and running. An application implements the desired behavior, instantiates it and communicates the state of the injection. This can be achieved by deriving from the RTIInjectionBehaviour component in Unity and RTIInjectionBehaviourComponent in Unreal.