Bevy Book: ECS

hello-world/src/main.rs

@@ -1,3 +1,36 @@
+use bevy::prelude::*;
+
 fn main() {
+    App::new()
+        .add_systems(Startup, add_people)
+        .add_systems(Update, (hello_world, greet_people))
+        .run();
+}
+
+#[derive(Component)]
+struct Person;
+
+#[derive(Component)]
+struct Name(String);
+
+impl Name {
+    fn new<S: Into<String>>(name: S) -> Self {
+        Self(name.into())
+    }
+}
+
+fn add_people(mut cmds: Commands) {
+    cmds.spawn((Person, Name::new("Elaina Proctor")));
+    cmds.spawn((Person, Name::new("Renzo Hume")));
+    cmds.spawn((Person, Name::new("Zayna Nieves")));
+}
+
+fn hello_world() {
     println!("Hello, world!");
 }
+
+fn greet_people(q: Query<&Name, With<Person>>) {
+    for name in &q {
+        println!("Hello, {}!", name.0);
+    }
+}