pub trait Event: Component { }
Expand description
Something that “happens” and might be read / observed by app logic.
Events can be stored in an Events<E>
resource
You can conveniently access events using the EventReader
and EventWriter
system parameter.
Events can also be “triggered” on a World
, which will then cause any Observer
of that trigger to run.
This trait can be derived.
Events implement the Component
type (and they automatically do when they are derived). Events are (generally)
not directly inserted as components. More often, the ComponentId
is used to identify the event type within the
context of the ECS.
Events must be thread-safe.
Object Safety§
This trait is not object safe.