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|
use ecs::actions::Actions;
use ecs::pair::{ChildOf, Pair};
use ecs::phase::{Phase, UPDATE as UPDATE_PHASE};
use ecs::{static_entity, Component, Query, World};
#[derive(Component)]
struct Wool
{
remaining: u32,
}
#[derive(Component)]
struct Health
{
health: u32,
}
#[derive(Component)]
struct Name
{
name: &'static str,
}
fn sheer(query: Query<(&mut Wool, &Name)>)
{
for (mut wool, name) in &query {
if wool.remaining == 0 {
println!("{} Has no wool left", name.name);
continue;
}
// Sheer the whool
wool.remaining -= 5;
println!("Sheered 5 wool from {}", name.name);
}
}
fn feed(query: Query<(&mut Health, &Name)>)
{
for (mut health, name) in &query {
health.health += 1;
println!("Feeded {} which gained 1 health", name.name);
}
}
fn age(query: Query<(&mut Health, &Name)>, mut actions: Actions)
{
for (mut health, name) in &query {
if health.health <= 2 {
health.health = 0;
println!("{} passed away", name.name);
actions.stop();
continue;
}
health.health -= 2;
println!("{} aged and lost 2 health", name.name);
}
}
static_entity!(SHEER_PHASE, (Phase, Pair::new::<ChildOf>(*UPDATE_PHASE)));
static_entity!(FEED_PHASE, (Phase, Pair::new::<ChildOf>(*SHEER_PHASE)));
static_entity!(AGE_PHASE, (Phase, Pair::new::<ChildOf>(*FEED_PHASE)));
fn main()
{
let mut world = World::new();
world.register_system(*SHEER_PHASE, sheer);
world.register_system(*FEED_PHASE, feed);
world.register_system(*AGE_PHASE, age);
world.create_entity((
Wool { remaining: 30 },
Health { health: 3 },
Name { name: "Bessy" },
));
world.start_loop();
}
|
