feat: 적과 충돌 시 미끄러짐 방지 및 8방향 양자화

- OnControllerColliderHit으로 적 충돌 감지
- 충돌 방향으로의 이동만 차단하여 튕겨나가지 않음
- 충돌 normal을 45도 간격으로 양자화하여 8각형 충돌 느낌 구현
- Enemy 레이어 추가

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Assets/Prefabs/Player/Player.prefab

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@@ -134,7 +134,7 @@ MonoBehaviour:
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   ShowTopMostFoldoutHeaderGroup: 1
   moveSpeed: 5
-  rotationSpeed: 10
+  rotationSpeed: 20
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   jumpForce: 5
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Assets/Scenes/Test.unity

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Assets/Scripts/Player/PlayerMovement.cs

@@ -31,6 +31,10 @@ namespace Colosseum.Player
         private bool isJumping;
         private bool wasGrounded;
 
+        // 적 충돌 방향 (이동 차단용)
+        private Vector3 blockedDirection;
+        private int enemyLayerMask;
+
         /// <summary>
         /// 현재 이동 속도 (애니메이션용)
         /// </summary>
@@ -79,6 +83,9 @@ namespace Colosseum.Player
 
             // 카메라 설정
             SetupCamera();
+
+            // 적 레이어 마스크 초기화
+            enemyLayerMask = LayerMask.GetMask("Enemy");
         }
 
         /// <summary>
@@ -233,10 +240,24 @@ namespace Colosseum.Player
             moveDirection = TransformDirectionByCamera(moveDirection);
             moveDirection.Normalize();
 
+            // 충돌 방향으로의 이동 차단 (미끄러짐 방지)
+            if (blockedDirection != Vector3.zero)
+            {
+                float blockedAmount = Vector3.Dot(moveDirection, blockedDirection);
+                if (blockedAmount > 0f)
+                {
+                    moveDirection -= blockedDirection * blockedAmount;
+                    moveDirection.Normalize();
+                }
+            }
+
             // 이동 적용
             Vector3 moveVector = moveDirection * moveSpeed * Time.deltaTime;
             characterController.Move(moveVector + velocity * Time.deltaTime);
 
+            // 충돌 방향 리셋
+            blockedDirection = Vector3.zero;
+
             // 회전 (이동 중일 때만)
             if (moveDirection != Vector3.zero)
             {
@@ -330,5 +351,43 @@ namespace Colosseum.Player
 
             wasGrounded = characterController.isGrounded;
         }
+
+        /// <summary>
+        /// CharacterController 충돌 처리. 적과 충돌 시 해당 방향 이동을 차단합니다.
+        /// 충돌 normal을 8방향으로 양자화하여 각진 충돌 느낌을 줍니다.
+        /// </summary>
+        private void OnControllerColliderHit(ControllerColliderHit hit)
+        {
+            // 적과의 충돌인지 확인
+            if ((enemyLayerMask & (1 << hit.gameObject.layer)) != 0)
+            {
+                // 충돌 방향 저장 (이동 차단용)
+                blockedDirection = hit.normal;
+                blockedDirection.y = 0f;
+                blockedDirection.Normalize();
+
+                // 8방향으로 양자화 (45도 간격)
+                blockedDirection = QuantizeToOctagon(blockedDirection);
+            }
+        }
+
+        /// <summary>
+        /// 방향을 8각형(45도 간격) 방향으로 양자화합니다.
+        /// </summary>
+        private Vector3 QuantizeToOctagon(Vector3 direction)
+        {
+            if (direction == Vector3.zero)
+                return direction;
+
+            // 각도 계산
+            float angle = Mathf.Atan2(direction.x, direction.z) * Mathf.Rad2Deg;
+
+            // 45도 단위로 반올림
+            float snappedAngle = Mathf.Round(angle / 45f) * 45f;
+
+            // 다시 벡터로 변환
+            float radians = snappedAngle * Mathf.Deg2Rad;
+            return new Vector3(Mathf.Sin(radians), 0f, Mathf.Cos(radians));
+        }
     }
 }

ProjectSettings/TagManager.asset

@@ -2,7 +2,7 @@
 %TAG !u! tag:unity3d.com,2011:
 --- !u!78 &1
 TagManager:
-  serializedVersion: 2
+  serializedVersion: 3
   tags: []
   layers:
   - Default
@@ -11,7 +11,7 @@ TagManager:
   - 
   - Water
   - UI
-  - 
+  - Enemy
   - 
   - 
   - 
@@ -50,27 +50,3 @@ TagManager:
   - Light Layer 5
   - Light Layer 6
   - Light Layer 7
-  - 
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