Switched to Direction enum

Assets/Scripts/PelletManager.cs

@@ -18,6 +18,11 @@ namespace Marro.PacManUdon
 
         byte[] syncedPelletsCollected;
 
+        int[] tilemap;
+
+        const int mazeWidth = 28;
+        const int mazeHeight = 31;
+
         public void Initialize()
         {
             gameObject.SetActive(true);
@@ -32,6 +37,7 @@ namespace Marro.PacManUdon
             SubscribeToEvent(NetworkEventType.SyncPellets);
         }
 
+        #region Power pellet blink
         public override void SyncedUpdate()
         {
             if (!powerPelletBlinkEnabled)
@@ -72,7 +78,39 @@ namespace Marro.PacManUdon
         {
             powerPelletBlinkEnabled = !frozen;
         }
+        #endregion
 
+        #region Collision
+        public bool IsWallUpcoming(Vector2 position, Vector2 directionVector)
+        {
+            var result = GetTileAt(position + directionVector) == (int)PacManTileType.Wall;
+            Debug.Log($"Is wall upcoming {result} at position {position}, direction {directionVector}");
+            return result;
+        }
+
+        public bool[] GetBlockedDirections(Vector2 position)
+        {
+            var results = new bool[4];
+
+            results[0] = IsWallUpcoming(position, Vector2.down);
+            results[1] = IsWallUpcoming(position, Vector2.up);
+            results[2] = IsWallUpcoming(position, Vector2.left);
+            results[3] = IsWallUpcoming(position, Vector2.right);
+
+            return results;
+        }
+
+        private int GetTileAt(Vector2 position) => tilemap[GetTilemapIndex(position)];
+
+        private int GetTilemapIndex(Vector2 position)
+        {
+            position = Clamp(position, 0, mazeWidth - 1, 1 - mazeHeight, 0);
+            var index = (int)(position.x + 0.5) - (int)(position.y - 0.5) * mazeWidth;
+            return index;
+        }
+        #endregion
+
+        #region Pellet collecting
         public int PelletCollected(Pellet pellet)
         {
             pellet.gameObject.SetActive(false);
@@ -95,6 +133,8 @@ namespace Marro.PacManUdon
             syncedPelletsCollected = new byte[pellets.Length/8 + 1];
             PelletCollectedCount = 0;
 
+            tilemap = PacManConstants.GetMazeDefinition();
+
             return PelletCount;
         }
 
@@ -131,5 +171,33 @@ namespace Marro.PacManUdon
             SetPelletsCollectedFromSync();
             return true;
         }
+        #endregion
+
+        #region Utils
+        private static Vector2 Clamp(Vector2 vector, float xMin, float xMax, float yMin, float yMax)
+        {
+            if (vector.x < xMin)
+            {
+                vector.x = xMin;
+            }
+
+            if (vector.x > xMax)
+            {
+                vector.x = xMax;
+            }
+
+            if (vector.y < yMin)
+            {
+                vector.y = yMin;
+            }
+
+            if (vector.y > yMax)
+            {
+                vector.y = yMax;
+            }
+
+            return vector;
+        }
+        #endregion
     }
 }