Проектная работа - WIP

bevy tutorial

snake-game/examples/bevy_tutorial.rs

@@ -2,44 +2,33 @@ use bevy::prelude::*;
 
 fn main() {
     App::new()
-        .add_systems(Startup, add_people)
-        .add_systems(Update, (hello_world, (update_people, greet_people).chain()))
+        .add_plugins(DefaultPlugins)
+        .add_plugins(HelloPlugin)
         .run();
 }
 
-#[derive(Component)]
-struct Position {
-    x: f32,
-    y: f32,
-}
-
-fn print_position_system(query: Query<&Position>) {
-    for position in &query {
-        println!("position: {} {}", position.x, position.y);
-    }
-}
-
-struct Entity(u64);
-
-fn hello_world() {
-    println!("hello world!");
-}
-
 #[derive(Component)]
 struct Person;
 
 #[derive(Component)]
 struct Name(String);
 
+#[derive(Resource)]
+struct GreetTimer(Timer);
+
 fn add_people(mut commands: Commands) {
     commands.spawn((Person, Name("Elaina Proctor".to_string())));
     commands.spawn((Person, Name("Renzo Hume".to_string())));
     commands.spawn((Person, Name("Zaina Nieves".to_string())));
 }
 
-fn greet_people(query: Query<&Name, With<Person>>) {
-    for name in &query {
-        println!("hello {}!", name.0);
+fn greet_people(time: Res<Time>, mut timer: ResMut<GreetTimer>, query: Query<&Name, With<Person>>) {
+    // update uor timer with the time elapsed since the last update
+    // if that causes the timer to finish, we say hello to everyone
+    if timer.0.tick(time.delta()).just_finished() {
+        for name in &query {
+            info!("hello {}!", name.0);
+        }
     }
 }
 
@@ -51,3 +40,13 @@ fn update_people(mut query: Query<&mut Name, With<Person>>) {
         }
     }
 }
+
+pub struct HelloPlugin;
+
+impl Plugin for HelloPlugin {
+    fn build(&self, app: &mut App) {
+        app.insert_resource(GreetTimer(Timer::from_seconds(2.0, TimerMode::Repeating)));
+        app.add_systems(Startup, add_people);
+        app.add_systems(Update, (update_people, greet_people).chain());
+    }
+}