Health bars code

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Assets/Prefabs/Dimension2/Dimension2.prefab

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Assets/Prefabs/Dimension3/Dimension3.prefab

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Assets/Scripts/DimensionController.cs

@@ -2,18 +2,23 @@ using UnityEngine;
 
 public class DimensionController : MonoBehaviour
 {
+    static private int STARTING_HP = 25;
+
     [SerializeField] private int dimensionId;
-    [SerializeField] private int maxHp;
     
     private float _hp;
+    private float _maxHp;
 
     private void Start()
     {
-        _hp = maxHp;
+        _maxHp = STARTING_HP;
+        _hp = _maxHp;
     }
 
     private void OnTriggerEnter(Collider other)
     {
+        if (_hp <= 0) { return; }
+
         var enemy = other.GetComponent<Enemy>();
         if (ReferenceEquals(enemy, null)) return;
         
@@ -23,7 +28,6 @@ public class DimensionController : MonoBehaviour
         // Destroy projectile
         Destroy(other.gameObject);
 
-        // Check loss condition
+        GameManager.Instance.DealDamage(dimensionId, _hp, _maxHp);
-        if (_hp <= 0) GameManager.Instance.TriggerGameOver(dimensionId);
     }
 }

Assets/Scripts/GameManager.cs

@@ -3,6 +3,8 @@ using UnityEngine.InputSystem;
 
 public class GameManager : MonoBehaviour
 {
+    private const int STARTING_DIMENSION_ID = 2;
+
     [SerializeField] private PlayerInput controls;
     [SerializeField] private CannonScript[] cannonList;
     [SerializeField] private UIController uiController;
@@ -10,6 +12,7 @@ public class GameManager : MonoBehaviour
     [Header("Game Variables")]
     [SerializeField, ReadOnly] private GameState state;
     [SerializeField, ReadOnly] private float points;
+    [SerializeField, ReadOnly] private int currentDimensionID = STARTING_DIMENSION_ID;
 
     public static GameManager Instance { get; private set; }
 
@@ -22,13 +25,23 @@ public class GameManager : MonoBehaviour
         else
         {
             Instance = this;
+            currentDimensionID = STARTING_DIMENSION_ID;
             state = GameState.InGame;
             points = 0f;
             uiController.UpdatePointsText(points);
         }
     }
 
-    public void TriggerGameOver(int dimensionID)
+    public void DealDamage(int dimensionID, float hp, float maxHP) 
+    {
+        uiController.SetDimensionHP(currentDimensionID, dimensionID, hp, maxHP);
+
+        // Check loss condition
+        if (hp <= 0) 
+            TriggerGameOver(dimensionID);
+    }
+
+    private void TriggerGameOver(int dimensionID)
     {
         if (state == GameState.Loss) return;
         

Assets/Scripts/UI.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 6465f8911e4b1cc48b234ad098abd56c
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/UI/HealthBar.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: cd45a64a48c65414d8dea5ccb9ba90a4
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/UI/HealthBar/HealthBar.cs

@@ -0,0 +1,23 @@
+using System.Collections;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class HealthBar : MonoBehaviour
+{
+    [SerializeField] private Image img_fill;
+    [SerializeField] private Image img_fillWhite;
+    [SerializeField] private float imgWhiteFillSpeed = 1f;
+
+    private float targetFillAmount;
+
+    private void Update()
+    {
+        img_fillWhite.fillAmount = Mathf.Lerp(img_fillWhite.fillAmount, targetFillAmount, Time.deltaTime * imgWhiteFillSpeed);
+    }
+
+    public void SetFillingAmount(float fillingAmount) 
+    {
+        targetFillAmount = fillingAmount;
+        img_fill.fillAmount = targetFillAmount;
+    }
+}

Assets/Scripts/UI/HealthBar/HealthBar.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: fc7ea5b1fff48b444b980ce43abc135c
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/UIController.cs

@@ -1,14 +1,30 @@
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
+using UnityEngine.UI;
 using TMPro;
 
 public class UIController : MonoBehaviour
 {
-    [SerializeField]private TMP_Text pointsTxt;
+    [SerializeField] private TMP_Text pointsTxt;
+
+    [SerializeField] private HealthBar mainHealtBars;
+    [SerializeField] private HealthBar[] verticalHealthBars;
 
     public void UpdatePointsText(float points)
     {
         pointsTxt.text = points.ToString("0");
     }
+
+    public void SetDimensionHP(int currentDimensionID, int dimensionID, float hp, float maxHP) 
+    {
+        float hpFillingAmount = hp / maxHP;
+        verticalHealthBars[dimensionID - 1].SetFillingAmount(hpFillingAmount);
+
+        // Also change main HP bar if this is the current dimension.
+        if (currentDimensionID == dimensionID)
+        {
+            mainHealtBars.SetFillingAmount(hpFillingAmount);
+        }
+    }
 }