Update game.js

game.js

@@ -676,6 +676,36 @@ class Game {
               location.reload(); // 게임 자동 재시작
               return;
           }
+          createMapBoundary() {
+    const boundaryGeometry = new THREE.BoxGeometry(1, 20, MAP_SIZE);
+    const boundaryMaterial = new THREE.MeshPhongMaterial({
+        color: 0x808080,
+        transparent: true,
+        opacity: 0.5
+    });
+
+    // 동쪽 벽
+    const eastWall = new THREE.Mesh(boundaryGeometry, boundaryMaterial);
+    eastWall.position.set(MAP_SIZE/2, 10, 0);
+    this.scene.add(eastWall);
+
+    // 서쪽 벽
+    const westWall = new THREE.Mesh(boundaryGeometry, boundaryMaterial);
+    westWall.position.set(-MAP_SIZE/2, 10, 0);
+    this.scene.add(westWall);
+
+    // 북쪽 벽
+    const northWall = new THREE.Mesh(boundaryGeometry, boundaryMaterial);
+    northWall.rotation.y = Math.PI/2;
+    northWall.position.set(0, 10, MAP_SIZE/2);
+    this.scene.add(northWall);
+
+    // 남쪽 벽
+    const southWall = new THREE.Mesh(boundaryGeometry, boundaryMaterial);
+    southWall.rotation.y = Math.PI/2;
+    southWall.position.set(0, 10, -MAP_SIZE/2);
+    this.scene.add(southWall);
+}
       
           // 카메라 초기 위치 설정
           const tankPosition = this.tank.getPosition();