Add egui as a UI system

src/main.rs

@@ -1,4 +1,5 @@
 use bevy::prelude::*;
+use bevy_egui::{egui, EguiContexts, EguiPlugin};
 
 pub mod util;
 pub mod components;
@@ -10,16 +11,18 @@ use util::roll;
 fn main() {
     App::new()
         .add_plugins(DefaultPlugins)
+        .add_plugins(EguiPlugin)
         .add_systems(Startup, setup)
+        .add_systems(Update, gui)
         .run();
 }
 
-
 fn setup(
     mut commands: Commands,
     mut meshes: ResMut<Assets<Mesh>>,
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
+    let names = ["Dane", "Cole"];
     for i in 0..2 {
         let (hp, _) = roll("1d6 + 3");
         commands.spawn(Creature {
@@ -35,7 +38,9 @@ fn setup(
                 ..default()
             },
         })
-            .insert(PlayerCharacter)
+            .insert(PlayerCharacter {
+                name: names[i].to_string(),
+            })
             .with_children(|parent| {
                 parent.spawn(PbrBundle {
                     mesh: meshes.add(shape::Capsule::default().into()),
@@ -47,10 +52,27 @@ fn setup(
 
     commands.spawn(DirectionalLightBundle {
         transform: Transform::default().looking_at(Vec3::new(3.0, -50.0, 1.0), Vec3::Y),
-        ..default()
+        ..default::<_>()
     });
-    commands.spawn(Camera3dBundle{
+    commands.spawn(Camera3dBundle {
         transform: Transform::from_xyz(1.0, 15.0, 2.0).looking_at(Vec3::ZERO, Vec3::Y),
         ..default()
     });
 }
+
+fn gui(
+    query: Query<(&Health, &PlayerCharacter)>,
+    mut contexts: EguiContexts
+) {
+    let ctx = contexts.ctx_mut();
+    egui::Window::new("Battle Menu")
+        .title_bar(false)
+        .collapsible(false)
+        .resizable(false)
+        .movable(false)
+        .show(ctx, |ui| {
+            for (health, pc) in query.iter() {
+                ui.label(format!("{} HP: {}", pc.name, health.hp));
+            }
+        });
+}