There is a convenient world.send_event API, but there is nothing quite so obvious for reading events given world access. How can that be done?
#How do you read events within an exclusive system? (i.e., directly from `world`)
sinful bridge
noble ruin
Huh, slightly more awkward than I thought
fn w(w: &mut World) {
for i in w
.resource::<Events<Bob>>()
.get_reader()
.read(w.resource::<Events<Bob>>())
{
//
}
}
pine idol
Huh, slightly more awkward than I thought
```rust
fn w(w: &mut World) {
for ...
That will either miss some events or see some twice.
Prefer a Local<ManualEventsReader<Bob>> system paramenter instead and call .read(...) on it.
noble ruin
Can you get system param out of world?
outer panther
Use SystemState
modern sundial
It can be a param along side the world, something like this should be possible
fn foo(world: &mut World, mut reader: Local<ManualEventReader<Bar>>) {
let events = world.resource_mut::<Events<Bar>>();
for event in reader.read(&events) { }
}```Though as mentioned, use SystemState like rs fn foo(world: &mut World, state: &mut SystemState<EventReader<Bar>>) { let mut reader = state.get_mut(world); for event in reader.read() { } }
Actually allows you to re-use custom SystemParams like EventReader instead of having to manually re-implement them