Kielan · December 17, 2025 00:09 · Dec 17, 2025
diff --git a/main.rs b/main.rs
@@ -0,0 +1,115 @@
+use bevy::prelude::*;
+
+#[derive(Resource)]
+pub struct Stamina {
+    pub current: f32,
+    pub max: f32,
+
+    pub regen_rate: f32,     // stamina per second
+    pub regen_delay: f32,    // seconds after last drain before regen
+    pub time_since_drain: f32,
+}
+
+impl Stamina {
+    pub fn new(max: f32) -> Self {
+        Self {
+            current: max,
+            max,
+            regen_rate: 80.0,
+            regen_delay: 0.6,
+            time_since_drain: 0.0,
+        }
+    }
+
+    pub fn drain(&mut self, amount: f32) {
+        self.current = (self.current - amount).max(0.0);
+        self.time_since_drain = 0.0;
+    }
+
+    pub fn regen(&mut self, dt: f32) {
+        if self.time_since_drain >= self.regen_delay {
+            self.current = (self.current + self.regen_rate * dt)
+                .min(self.max);
+        } else {
+            self.time_since_drain += dt;
+        }
+    }
+
+    pub fn ratio(&self) -> f32 {
+        self.current / self.max
+    }
+}
+
+use bevy_egui::{EguiContexts, EguiPlugin};
+
+pub struct StaminaPlugin;
+
+impl Plugin for StaminaPlugin {
+    fn build(&self, app: &mut App) {
+        app
+            .insert_resource(Stamina::new(360.0))
+            .add_systems(Update, (
+                stamina_input_system,
+                stamina_regen_system,
+                stamina_ui_system,
+            ));
+    }
+}
+
+fn stamina_input_system(
+    mouse: Res<Input<MouseButton>>,
+    mut stamina: ResMut<Stamina>,
+) {
+    if mouse.just_pressed(MouseButton::Left) {
+        if stamina.current >= 40.0 {
+            stamina.drain(40.0);
+            // Trigger slash animation here
+        }
+    }
+}
+
+use bevy_egui::egui;
+use std::f32::consts::TAU;
+
+fn stamina_ui_system(
+    mut contexts: EguiContexts,
+    stamina: Res<Stamina>,
+) {
+    egui::Area::new("stamina_ui")
+        .fixed_pos(egui::pos2(40.0, 40.0))
+        .show(contexts.ctx_mut(), |ui| {
+            let size = egui::vec2(90.0, 90.0);
+            let (rect, _) = ui.allocate_exact_size(size, egui::Sense::hover());
+
+            let painter = ui.painter();
+            let center = rect.center();
+            let radius = rect.width() * 0.45;
+
+            let start_angle = -TAU / 4.0;
+            let end_angle = start_angle + TAU * stamina.ratio();
+
+            // Background ring
+            painter.circle_stroke(
+                center,
+                radius,
+                egui::Stroke::new(6.0, egui::Color32::DARK_GRAY),
+            );
+
+            // Stamina arc
+            painter.arc(
+                center,
+                radius,
+                start_angle,
+                end_angle,
+                egui::Stroke::new(6.0, egui::Color32::from_rgb(70, 220, 120)),
+            );
+        });
+}
+
+fn main() {
+    App::new()
+        .add_plugins(DefaultPlugins)
+        .add_plugins(EguiPlugin)
+        .add_plugins(StaminaPlugin)
+        .run();
+}
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