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|
use ecs::event::{Event, Id as EventId};
use ecs::{Component, Query, World};
#[derive(Component)]
struct SomeData
{
num: u64,
}
#[derive(Component)]
struct Greeting
{
greeting: String,
}
fn say_hello(query: Query<(SomeData, Greeting)>)
{
for (data, greeting) in &query {
println!("{}: {}", greeting.greeting, data.num);
}
}
#[derive(Debug)]
struct Start;
impl Event for Start
{
fn id(&self) -> EventId
{
EventId::of::<Self>()
}
}
fn main()
{
let mut world = World::new();
world.register_system(&Start, say_hello);
world.create_entity((
SomeData { num: 987_654 },
Greeting {
greeting: "Good afternoon".to_string(),
},
));
world.create_entity((
SomeData { num: 345 },
Greeting { greeting: "Good evening".to_string() },
));
world.emit(&Start);
}
|
