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Assets/FPS/Scripts/UI/PlayerHealthBar.cs

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+using Unity.FPS.Game;
+using Unity.FPS.Gameplay;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Unity.FPS.UI
+{
+    public class PlayerHealthBar : MonoBehaviour
+    {
+        [Tooltip("Image component dispplaying current health")]
+        public Image HealthFillImage;
+
+        Health m_PlayerHealth;
+
+        void Start()
+        {
+            PlayerCharacterController playerCharacterController =
+                GameObject.FindFirstObjectByType<PlayerCharacterController>();
+            DebugUtility.HandleErrorIfNullFindObject<PlayerCharacterController, PlayerHealthBar>(
+                playerCharacterController, this);
+
+            m_PlayerHealth = playerCharacterController.GetComponent<Health>();
+            DebugUtility.HandleErrorIfNullGetComponent<Health, PlayerHealthBar>(m_PlayerHealth, this,
+                playerCharacterController.gameObject);
+        }
+
+        void Update()
+        {
+            // update health bar value
+            HealthFillImage.fillAmount = m_PlayerHealth.CurrentHealth / m_PlayerHealth.MaxHealth;
+        }
+    }
+}