1 files changed, 32 insertions, 0 deletions
diff --git a/src/entities/hp_bar.js b/src/entities/hp_bar.js
new file mode 100644
index 0000000..d6e68bb
--- /dev/null
+++ b/src/entities/hp_bar.js
@@ -0,0 +1,32 @@
+import { WHITE } from "../assets.js"
+import { Vector } from "../engine/vector.js"
+import { Engine } from "../engine.js"
+import { Entity } from "./entity.js"
+import { enemy } from "../main.js"
+
+export class HPBar extends Entity {
+    constructor() {
+        let size = new Vector(Engine.screen.viewport.x, 20)
+        super({
+            size: new Vector(Engine.screen.viewport.x, 20),
+            position: new Vector(size.x / 2, size.y / 2),
+            sprite: WHITE,
+            pixelated: true,
+        })
+
+        this.lasthp = enemy.hp
+    }
+
+    update() {
+        if (enemy.hp != this.lasthp) {
+            this.lasthp = enemy.hp
+
+            let hpScale = enemy.hp / enemy.max_hp
+            let viewport = Engine.screen.viewport
+
+            this.size.x = hpScale * viewport.x
+            this.position.x = (viewport.x / 2) - (1 - hpScale) / 2 * viewport.x
+        }
+    }
+}
+