Working on health bar

src/Character.h

@@ -160,6 +160,9 @@ public:
     // Called once when the death animation finishes and the character enters DEATH_IDLE.
     std::function<void()> onDeathAnimComplete;
 
+    // Called whenever hp changes (e.g. on damage). Arguments: current hp, max hp.
+    std::function<void(float hp, float maxHp)> onHpChanged;
+
 private:
 
     std::map<AnimationState, BoneAnimationDataNew> animations;