TO SQUASH: menu key movement.

Assets/Scripts/MainMenu/MenuKey.cs

@@ -10,26 +10,100 @@ public class MenuKey : MonoBehaviour
 
     private Animator animator;
 
+    private int currentRow = 0;
+
+    private int targetRow = 0;
+
+    private bool isTranslating = false;
+
+    private float translationElapsed = 0f;
+
+    private float translationStartY = 0f;
+
+    private float translationTargetY = 0f;
+
+    private MenuCallbackHolder callbackHolder;
+
+    private static float animationDuration = 0.45f;
+
+    private static float[] rowPositions = { 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
+ 
     // Start is called once before the first execution of Update after the MonoBehaviour is created
     void Start()
     {
         audioSource = GetComponent<AudioSource>();
         animator = GetComponent<Animator>();
+        callbackHolder = new MenuCallbackHolder();
+
+        // Precompute the row positions based on the number of rows and the desired spacing.
+        for (int i = 0; i < rowPositions.Length; i++)
+        {
+            rowPositions[i] = 1.462f - (i * 0.69f);
+        }
     }
 
     // Update is called once per frame
     void Update()
     {
-        
+        if (!isTranslating && currentRow != targetRow)
+        {
+            animator.SetTrigger("buttonChanged");
+
+            translationElapsed = 0f;
+            translationStartY = rowPositions[currentRow];
+            translationTargetY = rowPositions[targetRow];
+            isTranslating = true;
+        }
+
+        if (isTranslating)
+        {
+            translationElapsed += Time.deltaTime;
+
+            float t = Mathf.Clamp01(translationElapsed / animationDuration);
+            float easedT = EaseOutQuad(t);
+            float y = Mathf.Lerp(translationStartY, translationTargetY, easedT);
+
+            Vector3 position = transform.position;
+            position.y = y;
+            transform.position = position;
+
+            if (t >= 1f)
+            {
+                currentRow = targetRow;
+                isTranslating = false;
+
+                position.y = translationTargetY;
+                transform.position = position;
+
+                animator.ResetTrigger("buttonChanged");
+                animator.SetTrigger("inserted");
+            }
+        }
     }
 
-    public void playKeyTurnOpen(int _)
+    public void PlayKeyTurnOpen(int _)
     {
         audioSource.PlayOneShot(keyTurnOpen);
     }
 
-    public void playKeyTurnClose(int _)
+    public void PlayKeyTurnClose(int _)
     {
         audioSource.PlayOneShot(keyTurnClose);
     }
+
+    public void TranslateTo(int row)
+    {
+        targetRow = row;
+    }
+
+    public void InvokeCallback(int _)
+    {
+        callbackHolder.InvokeCallback(currentRow);
+    }
+
+    private float EaseOutQuad(float t)
+    {
+        // Quadratic easing out - deceleration until the end
+        return  1 - (1 - t) * (1 - t);
+    }
 }