added transition images system

Assets/Scripts/DialogBoxes.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.InputSystem;
 using TMPro;
+using UnityEngine.UI;
 
 public class DialogBoxes : MonoBehaviour
 {
@@ -12,19 +13,46 @@ public class DialogBoxes : MonoBehaviour
     private TMP_Text textField;
     private int messageCount = 0;
 
+    [Header("Images:")]
+    [SerializeField] Image backgroundImageObject;
+    [SerializeField] Sprite[] images;
+
+
     // Start is called before the first frame update
     void Start()
     {
         textField = this.gameObject.GetComponent<TMP_Text>();
+        ReconfigureSpriteArray();
         textField.text = dialogMessages[0];
+        backgroundImageObject.sprite = images[0];
     }
     
     void OnAdvanceDialog() {
         messageCount += 1;
         if (messageCount < dialogMessages.Length) {
             textField.text = dialogMessages[messageCount];
+            backgroundImageObject.sprite = images[messageCount];
         } else { // no more dialog messages, advance the scene
             GameObject.Find("SceneManager").GetComponent<SceneController>().NextScene();
         }
     }
+
+    void ReconfigureSpriteArray() {
+        // resize if need to
+        if (images.Length != dialogMessages.Length) {
+            Sprite[] newImagesArray = new Sprite[dialogMessages.Length];
+            for (int i = 0; i < newImagesArray.Length; i++) {
+                newImagesArray[i] = images[i];
+            }
+            images = newImagesArray;
+        }
+
+        // update empty slots
+        for (int i = 1; i < images.Length; i++) {
+            if (images[i] == null ) {
+                images[i] = images[i-1];
+            }
+        }
+
+    }
 }