Проектная работа - MVP

Создание нового проекта

snake-game/examples/schedules_test.rs

@@ -0,0 +1,69 @@
+use bevy::prelude::*;
+
+fn main() {
+    App::new() //
+        .add_plugins(DefaultPlugins)
+        .add_systems(PreStartup, pre_startup)
+        .add_systems(Startup, (startup, setup))
+        .add_systems(PostStartup, post_startup)
+        .add_systems(First, first)
+        .add_systems(PreUpdate, pre_update)
+        .add_systems(Update, (update, check_space_pressed))
+        .add_systems(PostUpdate, post_update)
+        .run();
+}
+
+fn pre_startup() {
+    info!("PreStartup");
+}
+
+fn startup() {
+    info!("Startup");
+}
+
+fn post_startup() {
+    info!("PostStartup");
+}
+
+fn first() {
+    info!("First");
+}
+
+fn pre_update() {
+    info!("PreUpdate");
+}
+
+fn update() {
+    info!("Update");
+}
+
+fn post_update() {
+    info!("PostUpdate");
+}
+
+fn check_space_pressed(input: Res<ButtonInput<KeyCode>>, mut commands: Commands) {
+    if input.just_pressed(KeyCode::Space) {
+        commands.trigger(TestEvent0);
+    }
+}
+
+fn setup(mut commands: Commands) {
+    commands.spawn((Observer::new(test_event_0_handler),));
+    commands.spawn((Observer::new(test_event_1_handler),));
+}
+
+#[derive(Event, Debug)]
+struct TestEvent0;
+
+#[derive(Event, Debug)]
+struct TestEvent1;
+
+fn test_event_0_handler(event: On<TestEvent0>, mut commands: Commands) {
+    info!("handle {:?}", event.event());
+    commands.trigger(TestEvent1);
+}
+
+fn test_event_1_handler(event: On<TestEvent1>, mut commands: Commands) {
+    info!("handle {:?}", event.event());
+    commands.trigger(TestEvent0);
+}