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|
use ecs::pair::Pair;
use ecs::phase::START as START_PHASE;
use ecs::{Component, Query, World};
#[derive(Component)]
struct Person
{
name: String,
}
fn print_dog_likers(query: Query<(&Person, Pair<Likes, &Dogs>)>)
{
for (person, liked_dogs) in &query {
println!(
"{} likes {} dogs!",
person.name,
if liked_dogs.large { "large" } else { "small" },
);
}
}
#[derive(Component)]
struct Likes;
#[derive(Component)]
struct Cats;
#[derive(Component)]
struct Dogs
{
large: bool,
}
fn main()
{
let mut world = World::new();
world.register_system(*START_PHASE, print_dog_likers);
world.create_entity((
Person { name: "Irving".to_string() },
Pair::new_with_comp_target::<Likes>(Dogs { large: true }),
));
world.create_entity((
Person { name: "Mark".to_string() },
Pair::new_with_comp_target::<Likes>(Cats),
));
world.create_entity((
Person { name: "Helena".to_string() },
Pair::new_with_comp_target::<Likes>(Dogs { large: false }),
));
world.step();
}
|
