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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Shared World Builder</title>
    <style>
        body { margin: 0; overflow: hidden; }
        canvas { display: block; }
        #info { position: absolute; top: 10px; left: 10px; color: white; background: rgba(0,0,0,0.7); padding: 10px; }
    </style>
</head>
<body>
    <div id="info">Click to place selected object or move player, right-click to delete.</div>
    <script type="importmap">
        {
            "imports": {
                "three": "https://unpkg.com/[email protected]/build/three.module.js",
                "three/addons/": "https://unpkg.com/[email protected]/examples/jsm/"
            }
        }
    </script>

    <script type="module">
        import * as THREE from 'three';

        let scene, camera, renderer;
        let raycaster, mouse;
        let worldObjects = new Map();
        let groundMeshes = {};

        // Access State from Streamlit
        const myUsername = window.USERNAME || `User_${Math.random().toString(36).substring(2, 6)}`;
        let selectedObjectType = window.SELECTED_OBJECT_TYPE || "None";
        const plotWidth = window.PLOT_WIDTH || 50.0;
        const plotDepth = window.PLOT_DEPTH || 50.0;
        const worldState = window.WORLD_STATE || { objects: {}, players: {}, action_history: [] };

        // Materials
        const groundMaterial = new THREE.MeshStandardMaterial({ color: 0x55aa55, roughness: 0.9, metalness: 0.1, side: THREE.DoubleSide });
        const placeholderGroundMaterial = new THREE.MeshStandardMaterial({ color: 0x448844, roughness: 0.95, metalness: 0.1, side: THREE.DoubleSide });
        const objectMaterials = {
            'wood': new THREE.MeshStandardMaterial({ color: 0x8B4513, roughness: 0.9 }),
            'leaf': new THREE.MeshStandardMaterial({ color: 0x228B22, roughness: 0.8 }),
            'stone': new THREE.MeshStandardMaterial({ color: 0xaaaaaa, roughness: 0.8, metalness: 0.1 }),
            'house_wall': new THREE.MeshStandardMaterial({ color: 0xffccaa, roughness: 0.8 }),
            'house_roof': new THREE.MeshStandardMaterial({ color: 0xaa5533, roughness: 0.7 }),
            'brick': new THREE.MeshStandardMaterial({ color: 0x9B4C43, roughness: 0.85 }),
            'metal': new THREE.MeshStandardMaterial({ color: 0xcccccc, roughness: 0.4, metalness: 0.8 }),
            'gem': new THREE.MeshStandardMaterial({ color: 0x4FFFFF, roughness: 0.1, metalness: 0.2, transparent: true, opacity: 0.8 }),
            'light': new THREE.MeshBasicMaterial({ color: 0xFFFF88 })
        };

        const VALID_OBJECT_TYPES = [
            "Tree", "Rock", "Simple House", "Pine Tree", "Brick Wall", "Sphere", "Cube",
            "Cylinder", "Cone", "Torus", "Mushroom", "Cactus", "Campfire", "Star", "Gem",
            "Tower", "Barrier", "Fountain", "Lantern", "Sign Post"
        ];

        function init() {
            scene = new THREE.Scene();
            scene.background = new THREE.Color(0xabcdef);

            const aspect = window.innerWidth / window.innerHeight;
            camera = new THREE.PerspectiveCamera(60, aspect, 0.1, 5000);
            camera.position.set(plotWidth / 2, 15, plotDepth / 2 + 20);
            camera.lookAt(plotWidth/2, 0, plotDepth/2);
            scene.add(camera);

            setupLighting();
            createGroundPlane(0, 0, false);

            raycaster = new THREE.Raycaster();
            mouse = new THREE.Vector2();

            renderer = new THREE.WebGLRenderer({ antialias: true });
            renderer.setSize(window.innerWidth, window.innerHeight);
            renderer.shadowMap.enabled = true;
            renderer.shadowMap.type = THREE.PCFSoftShadowMap;
            document.body.appendChild(renderer.domElement);

            document.addEventListener('mousemove', onMouseMove, false);
            document.addEventListener('click', onDocumentClick, false);
            document.addEventListener('contextmenu', onRightClick, false);
            window.addEventListener('resize', onWindowResize, false);

            window.updateSelectedObjectType = updateSelectedObjectType;

            // Initialize scene with world state
            loadWorldState();

            console.log(`Three.js Initialized for user: ${myUsername}`);
            animate();
        }

        function setupLighting() {
            const ambientLight = new THREE.AmbientLight(0xffffff, 0.6);
            scene.add(ambientLight);
            const directionalLight = new THREE.DirectionalLight(0xffffff, 1.2);
            directionalLight.position.set(75, 150, 100);
            directionalLight.castShadow = true;
            directionalLight.shadow.mapSize.width = 2048;
            directionalLight.shadow.mapSize.height = 2048;
            directionalLight.shadow.camera.near = 10;
            directionalLight.shadow.camera.far = 400;
            directionalLight.shadow.camera.left = -150;
            directionalLight.shadow.camera.right = 150;
            directionalLight.shadow.camera.top = 150;
            directionalLight.shadow.camera.bottom = -150;
            directionalLight.shadow.bias = -0.002;
            scene.add(directionalLight);
            const hemiLight = new THREE.HemisphereLight(0xabcdef, 0x55aa55, 0.5);
            scene.add(hemiLight);
        }

        function createGroundPlane(gridX, gridZ, isPlaceholder) {
            const gridKey = `${gridX}_${gridZ}`;
            if (groundMeshes[gridKey]) return groundMeshes[gridKey];
            const groundGeometry = new THREE.PlaneGeometry(plotWidth, plotDepth);
            const material = isPlaceholder ? placeholderGroundMaterial : groundMaterial;
            const groundMesh = new THREE.Mesh(groundGeometry, material);
            groundMesh.rotation.x = -Math.PI / 2;
            groundMesh.position.y = -0.05;
            groundMesh.position.x = gridX * plotWidth + plotWidth / 2.0;
            groundMesh.position.z = gridZ * plotDepth + plotDepth / 2.0;
            groundMesh.receiveShadow = true;
            groundMesh.userData.gridKey = gridKey;
            groundMesh.userData.isPlaceholder = isPlaceholder;
            groundMesh.name = 'ground';
            scene.add(groundMesh);
            groundMeshes[gridKey] = groundMesh;
            return groundMesh;
        }

        function loadWorldState() {
            clearWorldObjects();
            const objects = worldState.objects || {};
            console.log(`Loading ${Object.keys(objects).length} objects from WORLD_STATE`);
            for (const obj_id in objects) {
                const objData = objects[obj_id];
                if (!objData || !objData.obj_id || !objData.type || !VALID_OBJECT_TYPES.includes(objData.type) || !objData.position) {
                    console.warn(`Skipping invalid object: ${obj_id}`, objData);
                    continue;
                }
                const mesh = createAndPlaceObject(objData, false);
                if (!mesh) {
                    console.warn(`Failed to create mesh for object: ${obj_id}`, objData);
                }
            }
            const players = worldState.players || {};
            console.log(`Loading ${Object.keys(players).length} players from WORLD_STATE`);
            for (const username in players) {
                const pos = players[username].position;
                if (pos && typeof pos.x === 'number' && typeof pos.y === 'number' && typeof pos.z === 'number') {
                    createPlayerMarker(username, pos);
                } else {
                    console.warn(`Invalid player position for ${username}:`, pos);
                }
            }
            const actionHistory = worldState.action_history || [];
            console.log(`Loaded ${actionHistory.length} action history entries`);
        }

        function clearWorldObjects() {
            console.log("Clearing existing world objects...");
            for (const [obj_id, mesh] of worldObjects.entries()) {
                scene.remove(mesh);
            }
            worldObjects.clear();
            scene.children.forEach(child => {
                if (child.userData.isPlayerMarker) {
                    scene.remove(child);
                }
            });
        }

        function createPlayerMarker(username, position) {
            const geometry = new THREE.SphereGeometry(0.3, 8, 8);
            const material = new THREE.MeshBasicMaterial({ color: username === myUsername ? 0x0000ff : 0xff0000 });
            const marker = new THREE.Mesh(geometry, material);
            marker.position.set(position.x, position.y + 0.5, position.z);
            marker.userData.isPlayerMarker = true;
            marker.userData.username = username;
            scene.add(marker);
            console.log(`Created player marker for ${username} at`, position);
        }

        function createAndPlaceObject(objData, isNewlyPlacedLocally) {
            if (!objData || !objData.obj_id || !objData.type || !objData.position) {
                console.warn("Invalid object data:", objData);
                return null;
            }

            let mesh = worldObjects.get(objData.obj_id);
            let isNew = false;

            if (mesh) {
                if (mesh.position.distanceToSquared(new THREE.Vector3(objData.position.x, objData.position.y, objData.position.z)) > 0.001) {
                    mesh.position.set(objData.position.x, objData.position.y, objData.position.z);
                }
                if (objData.rotation && (
                    Math.abs(mesh.rotation.x - (objData.rotation._x || 0)) > 0.01 ||
                    Math.abs(mesh.rotation.y - (objData.rotation._y || 0)) > 0.01 ||
                    Math.abs(mesh.rotation.z - (objData.rotation._z || 0)) > 0.01 )) {
                    mesh.rotation.set(
                        objData.rotation._x || 0,
                        objData.rotation._y || 0,
                        objData.rotation._z || 0,
                        objData.rotation._order || 'XYZ'
                    );
                }
            } else {
                mesh = createPrimitiveMesh(objData.type);
                if (!mesh) return null;
                isNew = true;
                mesh.userData.obj_id = objData.obj_id;
                mesh.userData.type = objData.type;
                mesh.position.set(objData.position.x, objData.position.y, objData.position.z);
                if (objData.rotation) {
                    mesh.rotation.set(
                        objData.rotation._x || 0,
                        objData.rotation._y || 0,
                        objData.rotation._z || 0,
                        objData.rotation._order || 'XYZ'
                    );
                }
                scene.add(mesh);
                worldObjects.set(objData.obj_id, mesh);
                console.log(`Created new object ${objData.obj_id} (${objData.type}) at`, objData.position);
            }
            return mesh;
        }

        function createPrimitiveMesh(type) {
            if (!VALID_OBJECT_TYPES.includes(type)) {
                console.warn(`Invalid object type for mesh creation: ${type}`);
                return null;
            }

            let mesh = null;
            let geometry, material, material2;

            const wood = objectMaterials.wood;
            const leaf = objectMaterials.leaf;
            const stone = objectMaterials.stone;
            const house_wall = objectMaterials.house_wall;
            const house_roof = objectMaterials.house_roof;
            const brick = objectMaterials.brick;
            const metal = objectMaterials.metal;
            const gem = objectMaterials.gem;
            const lightMat = objectMaterials.light;

            try {
                switch(type) {
                    case "Tree":
                        mesh = new THREE.Group();
                        geometry = new THREE.CylinderGeometry(0.3, 0.4, 2, 8);
                        material = wood;
                        const trunk = new THREE.Mesh(geometry, material);
                        trunk.position.y = 1;
                        trunk.castShadow = true;
                        trunk.receiveShadow = true;
                        mesh.add(trunk);
                        geometry = new THREE.IcosahedronGeometry(1.2, 0);
                        material = leaf;
                        const canopy = new THREE.Mesh(geometry, material);
                        canopy.position.y = 2.8;
                        canopy.castShadow = true;
                        canopy.receiveShadow = false;
                        mesh.add(canopy);
                        break;
                    case "Rock":
                        geometry = new THREE.IcosahedronGeometry(0.7, 1);
                        material = stone;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        mesh.scale.set(1, Math.random()*0.4 + 0.8, 1);
                        break;
                    case "Simple House":
                        mesh = new THREE.Group();
                        geometry = new THREE.BoxGeometry(2, 1.5, 2.5);
                        material = house_wall;
                        const body = new THREE.Mesh(geometry, material);
                        body.position.y = 0.75;
                        body.castShadow = true;
                        body.receiveShadow = true;
                        mesh.add(body);
                        geometry = new THREE.ConeGeometry(1.8, 1, 4);
                        material = house_roof;
                        const roof = new THREE.Mesh(geometry, material);
                        roof.position.y = 1.5 + 0.5;
                        roof.rotation.y = Math.PI / 4;
                        roof.castShadow = true;
                        roof.receiveShadow = false;
                        mesh.add(roof);
                        break;
                    case "Pine Tree":
                        mesh = new THREE.Group();
                        geometry = new THREE.CylinderGeometry(0.2, 0.3, 2.5, 8);
                        material = wood;
                        const pineTrunk = new THREE.Mesh(geometry, material);
                        pineTrunk.position.y = 1.25;
                        pineTrunk.castShadow = true;
                        pineTrunk.receiveShadow = true;
                        mesh.add(pineTrunk);
                        geometry = new THREE.ConeGeometry(1, 2.5, 8);
                        material = leaf;
                        const pineCanopy = new THREE.Mesh(geometry, material);
                        pineCanopy.position.y = 2.5 + (2.5/2) - 0.5;
                        pineCanopy.castShadow = true;
                        pineCanopy.receiveShadow = false;
                        mesh.add(pineCanopy);
                        break;
                    case "Brick Wall":
                        geometry = new THREE.BoxGeometry(3, 2, 0.3);
                        material = brick;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 1;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Sphere":
                        geometry = new THREE.SphereGeometry(0.8, 16, 12);
                        material = metal;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.8;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Cube":
                        geometry = new THREE.BoxGeometry(1, 1, 1);
                        material = stone;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.5;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Cylinder":
                        geometry = new THREE.CylinderGeometry(0.5, 0.5, 1.5, 16);
                        material = metal;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.75;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Cone":
                        geometry = new THREE.ConeGeometry(0.6, 1.2, 16);
                        material = house_roof;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.6;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Torus":
                        geometry = new THREE.TorusGeometry(0.6, 0.2, 8, 24);
                        material = gem;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.7;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        mesh.rotation.x = Math.PI / 2;
                        break;
                    case "Mushroom":
                        mesh = new THREE.Group();
                        geometry = new THREE.CylinderGeometry(0.15, 0.1, 0.6, 8);
                        material = house_wall;
                        const stem = new THREE.Mesh(geometry, material);
                        stem.position.y = 0.3;
                        stem.castShadow = true;
                        stem.receiveShadow = true;
                        mesh.add(stem);
                        geometry = new THREE.SphereGeometry(0.4, 16, 8, 0, Math.PI * 2, 0, Math.PI / 2);
                        material = house_roof;
                        const cap = new THREE.Mesh(geometry, material);
                        cap.position.y = 0.6;
                        cap.castShadow = true;
                        cap.receiveShadow = false;
                        mesh.add(cap);
                        break;
                    case "Cactus":
                        mesh = new THREE.Group();
                        material = leaf;
                        geometry = new THREE.CylinderGeometry(0.3, 0.3, 1.5, 8);
                        const main = new THREE.Mesh(geometry, material);
                        main.position.y = 0.75;
                        main.castShadow = true;
                        main.receiveShadow = true;
                        mesh.add(main);
                        geometry = new THREE.CylinderGeometry(0.2, 0.2, 0.8, 8);
                        const arm1 = new THREE.Mesh(geometry, material);
                        arm1.position.set(0.3, 1, 0);
                        arm1.rotation.z = Math.PI / 4;
                        arm1.castShadow = true;
                        arm1.receiveShadow = true;
                        mesh.add(arm1);
                        const arm2 = new THREE.Mesh(geometry, material);
                        arm2.position.set(-0.3, 0.8, 0);
                        arm2.rotation.z = -Math.PI / 4;
                        arm2.castShadow = true;
                        arm2.receiveShadow = true;
                        mesh.add(arm2);
                        break;
                    case "Campfire":
                        mesh = new THREE.Group();
                        material = wood;
                        geometry = new THREE.CylinderGeometry(0.1, 0.1, 0.8, 5);
                        const log1 = new THREE.Mesh(geometry, material);
                        log1.rotation.x = Math.PI/2;
                        log1.position.set(0, 0.1, 0.2);
                        mesh.add(log1);
                        const log2 = new THREE.Mesh(geometry, material);
                        log2.rotation.set(Math.PI/2, 0, Math.PI/3);
                        log2.position.set(0.2*Math.cos(Math.PI/6), 0.1, -0.2*Math.sin(Math.PI/6));
                        mesh.add(log2);
                        const log3 = new THREE.Mesh(geometry, material);
                        log3.rotation.set(Math.PI/2, 0, -Math.PI/3);
                        log3.position.set(-0.2*Math.cos(Math.PI/6), 0.1, -0.2*Math.sin(Math.PI/6));
                        mesh.add(log3);
                        material2 = lightMat;
                        geometry = new THREE.ConeGeometry(0.2, 0.5, 8);
                        const flame = new THREE.Mesh(geometry, material2);
                        flame.position.y = 0.35;
                        mesh.add(flame);
                        break;
                    case "Star":
                        geometry = new THREE.SphereGeometry(0.5, 4, 2);
                        material = lightMat;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 1;
                        break;
                    case "Gem":
                        geometry = new THREE.OctahedronGeometry(0.6, 0);
                        material = gem;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.6;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Tower":
                        geometry = new THREE.CylinderGeometry(1, 1.2, 5, 8);
                        material = stone;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 2.5;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Barrier":
                        geometry = new THREE.BoxGeometry(2, 0.5, 0.5);
                        material = metal;
                        mesh = new THREE.Mesh(geometry, material);
                        mesh.position.y = 0.25;
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Fountain":
                        mesh = new THREE.Group();
                        material = stone;
                        geometry = new THREE.CylinderGeometry(1.5, 1.5, 0.3, 16);
                        const baseF = new THREE.Mesh(geometry, material);
                        baseF.position.y = 0.15;
                        mesh.add(baseF);
                        geometry = new THREE.CylinderGeometry(0.8, 0.8, 0.5, 16);
                        const midF = new THREE.Mesh(geometry, material);
                        midF.position.y = 0.3 + 0.25;
                        mesh.add(midF);
                        geometry = new THREE.CylinderGeometry(0.4, 0.4, 0.7, 16);
                        const topF = new THREE.Mesh(geometry, material);
                        topF.position.y = 0.8 + 0.35;
                        mesh.add(topF);
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    case "Lantern":
                        mesh = new THREE.Group();
                        material = metal;
                        geometry = new THREE.BoxGeometry(0.4, 0.6, 0.4);
                        const bodyL = new THREE.Mesh(geometry, material);
                        bodyL.position.y = 0.3;
                        mesh.add(bodyL);
                        geometry = new THREE.SphereGeometry(0.15);
                        material2 = lightMat;
                        const lightL = new THREE.Mesh(geometry, material2);
                        lightL.position.y = 0.3;
                        mesh.add(lightL);
                        mesh.castShadow = true;
                        break;
                    case "Sign Post":
                        mesh = new THREE.Group();
                        material = wood;
                        geometry = new THREE.CylinderGeometry(0.05, 0.05, 1.8, 8);
                        const postS = new THREE.Mesh(geometry, material);
                        postS.position.y = 0.9;
                        mesh.add(postS);
                        geometry = new THREE.BoxGeometry(0.8, 0.4, 0.05);
                        const signS = new THREE.Mesh(geometry, material);
                        signS.position.y = 1.5;
                        mesh.add(signS);
                        mesh.castShadow = true;
                        mesh.receiveShadow = true;
                        break;
                    default:
                        console.warn("Unexpected object type:", type);
                        return null;
                }
            } catch (e) {
                console.error(`Error creating geometry/mesh for type ${type}:`, e);
                return null;
            }

            if (mesh) {
                mesh.userData = { type: type };
                if (!mesh.position.y && mesh.geometry) {
                    mesh.geometry.computeBoundingBox();
                    mesh.position.y = (mesh.geometry.boundingBox.max.y - mesh.geometry.boundingBox.min.y) / 2;
                }
            }
            return mesh;
        }

        function onMouseMove(event) {
            mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
            mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;
        }

        function onDocumentClick(event) {
            const groundCandidates = Object.values(groundMeshes);
            if (groundCandidates.length === 0) return;

            raycaster.setFromCamera(mouse, camera);
            const intersects = raycaster.intersectObjects(groundCandidates);

            if (intersects.length > 0) {
                const intersectPoint = intersects[0].point;

                if (selectedObjectType !== "None" && selectedObjectType) {
                    // Place object
                    const newObjData = {
                        obj_id: THREE.MathUtils.generateUUID(),
                        type: selectedObjectType,
                        position: { x: intersectPoint.x, y: 0, z: intersectPoint.z },
                        rotation: { _x: 0, _y: Math.random() * Math.PI * 2, _z: 0, _order: 'XYZ' }
                    };

                    const tempMesh = createPrimitiveMesh(selectedObjectType);
                    if (tempMesh && tempMesh.geometry) {
                        tempMesh.geometry.computeBoundingBox();
                        const height = tempMesh.geometry.boundingBox.max.y - tempMesh.geometry.boundingBox.min.y;
                        newObjData.position.y = (height / 2) + intersectPoint.y + 0.01;
                    } else {
                        newObjData.position.y = 0.5 + intersectPoint.y;
                    }

                    console.log(`Placing ${selectedObjectType} (${newObjData.obj_id}) at`, newObjData.position);

                    const mesh = createAndPlaceObject(newObjData, true);
                    if (mesh) {
                        window.parent.postMessage({
                            type: 'place_object',
                            payload: { username: myUsername, object_data: newObjData }
                        }, '*');
                    }
                } else {
                    // Move player
                    const newPosition = {
                        x: intersectPoint.x,
                        y: 0.5,
                        z: intersectPoint.z
                    };
                    console.log(`Moving player ${myUsername} to`, newPosition);

                    window.parent.postMessage({
                        type: 'move_player',
                        payload: { username: myUsername, position: newPosition }
                    }, '*');
                }
            }
        }

        function onRightClick(event) {
            event.preventDefault();
            raycaster.setFromCamera(mouse, camera);
            const intersects = raycaster.intersectObjects(Array.from(worldObjects.values()));

            if (intersects.length > 0) {
                const obj_id = intersects[0].object.userData.obj_id;
                console.log(`Deleting object ${obj_id}`);
                removeObjectById(obj_id);
                window.parent.postMessage({
                    type: 'delete_object',
                    payload: { username: myUsername, obj_id: obj_id }
                }, '*');
            }
        }

        function removeObjectById(obj_id) {
            if (worldObjects.has(obj_id)) {
                const mesh = worldObjects.get(obj_id);
                scene.remove(mesh);
                worldObjects.delete(obj_id);
                console.log(`Removed object ${obj_id} from scene.`);
            } else {
                console.warn(`Attempted to remove non-existent object ID: ${obj_id}`);
            }
        }

        function onWindowResize() {
            camera.aspect = window.innerWidth / window.innerHeight;
            camera.updateProjectionMatrix();
            renderer.setSize(window.innerWidth, window.innerHeight);
        }

        function updateSelectedObjectType(newType) {
            console.log("JS updateSelectedObjectType received:", newType);
            selectedObjectType = newType;
        }

        function animate() {
            requestAnimationFrame(animate);
            renderer.render(scene, camera);
        }

        // Listen for messages from Streamlit
        window.addEventListener('message', (event) => {
            const data = event.data;
            if (data.type === 'place_object') {
                const mesh = createAndPlaceObject(data.payload.object_data, false);
                if (!mesh) {
                    console.warn(`Failed to place object from message:`, data.payload.object_data);
                }
            } else if (data.type === 'delete_object') {
                removeObjectById(data.payload.obj_id);
            } else if (data.type === 'move_player') {
                const username = data.payload.username;
                const position = data.payload.position;
                scene.children.forEach(child => {
                    if (child.userData.isPlayerMarker && child.userData.username === username) {
                        child.position.set(position.x, position.y + 0.5, position.z);
                        console.log(`Updated player marker for ${username} to`, position);
                    }
                });
            }
        });

        init();
    </script>
</body>
</html>