refactor: move game map into world folder

src/world/GameMap.tsx

@@ -0,0 +1,79 @@
+import { useEffect, useState, useRef } from "react";
+import { useGLTF } from "@react-three/drei";
+import * as THREE from "three";
+import { useOctreeGraphNode } from "@/hooks/useOctreeGraphNode";
+import { loadMapSceneData } from "@/utils/loadMapSceneData";
+import type { OctreeReadyHandler } from "@/types/3d";
+import type { MapNode } from "@/types/editor";
+
+interface GameMapProps {
+  onOctreeReady: OctreeReadyHandler;
+}
+
+export function GameMap({ onOctreeReady }: GameMapProps): React.JSX.Element {
+  const [mapNodes, setMapNodes] = useState<MapNode[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const groupRef = useRef<THREE.Group>(null);
+
+  useOctreeGraphNode(groupRef, onOctreeReady);
+
+  useEffect(() => {
+    const loadMap = async () => {
+      try {
+        const sceneData = await loadMapSceneData();
+        if (!sceneData) {
+          console.warn("map.json not found");
+          setIsLoading(false);
+          return;
+        }
+
+        setMapNodes(
+          sceneData.mapNodes.filter((node) => sceneData.models.has(node.name)),
+        );
+      } catch (error) {
+        console.error("Error loading map:", error);
+      } finally {
+        setIsLoading(false);
+      }
+    };
+
+    loadMap();
+  }, []);
+
+  if (isLoading) {
+    return <></>;
+  }
+
+  return (
+    <group ref={groupRef}>
+      {mapNodes.map((node, index) => (
+        <ModelInstance key={index} node={node} />
+      ))}
+    </group>
+  );
+}
+
+function ModelInstance({ node }: { node: MapNode }): React.JSX.Element {
+  const modelPath = `/models/${node.name}/model.gltf`;
+  const groupRef = useRef<THREE.Group>(null);
+  const { scene } = useGLTF(modelPath);
+  const { position, rotation, scale } = node;
+
+  useEffect(() => {
+    if (groupRef.current) {
+      groupRef.current.position.set(...position);
+      groupRef.current.rotation.set(...rotation);
+      groupRef.current.scale.set(...scale);
+    }
+  }, [position, rotation, scale]);
+
+  return (
+    <primitive
+      ref={groupRef}
+      object={scene}
+      position={position}
+      rotation={rotation}
+      scale={scale}
+    />
+  );
+}