Add runner mechanics and travel asset library

Assets/Scripts/SlideObstaclePattern.cs

@@ -0,0 +1,81 @@
+using UnityEngine;
+
+// 슬라이딩 장애물 패턴이 켜질 때마다 매달린 장애물 위치를 섞는다.
+public class SlideObstaclePattern : MonoBehaviour
+{
+    public Transform[] obstacles; // 위치를 바꿀 고공 장애물들
+    public float[] xPositions = { -1.65f, -0.55f, 0.55f, 1.65f }; // 선택 가능한 로컬 x 위치
+    public float minSpacing = 1.5f; // 두 장애물 사이의 최소 간격
+
+    private void OnEnable()
+    {
+        if(obstacles == null || obstacles.Length == 0 || xPositions == null || xPositions.Length == 0)
+        {
+            return;
+        }
+
+        int firstIndex = Random.Range(0, xPositions.Length);
+
+        if(obstacles.Length == 1 || xPositions.Length == 1)
+        {
+            PlaceObstacle(obstacles[0], xPositions[firstIndex]);
+            return;
+        }
+
+        int secondIndex = PickSecondIndex(firstIndex);
+
+        float leftX = xPositions[firstIndex];
+        float rightX = xPositions[secondIndex];
+
+        if(leftX > rightX)
+        {
+            float temp = leftX;
+            leftX = rightX;
+            rightX = temp;
+        }
+
+        PlaceObstacle(obstacles[0], leftX);
+        PlaceObstacle(obstacles[1], rightX);
+    }
+
+    private int PickSecondIndex(int firstIndex)
+    {
+        for(int i = 0; i < 12; i++)
+        {
+            int candidateIndex = Random.Range(0, xPositions.Length);
+
+            if(candidateIndex != firstIndex && Mathf.Abs(xPositions[candidateIndex] - xPositions[firstIndex]) >= minSpacing)
+            {
+                return candidateIndex;
+            }
+        }
+
+        int bestIndex = firstIndex;
+        float bestDistance = 0f;
+
+        for(int i = 0; i < xPositions.Length; i++)
+        {
+            float distance = Mathf.Abs(xPositions[i] - xPositions[firstIndex]);
+
+            if(distance > bestDistance)
+            {
+                bestDistance = distance;
+                bestIndex = i;
+            }
+        }
+
+        return bestIndex;
+    }
+
+    private void PlaceObstacle(Transform obstacle, float xPosition)
+    {
+        if(obstacle == null)
+        {
+            return;
+        }
+
+        Vector3 localPosition = obstacle.localPosition;
+        localPosition.x = xPosition;
+        obstacle.localPosition = localPosition;
+    }
+}