// 全局变量
let scene, camera, renderer, controls;
let water, sun, sky;
let windTurbineModels = []; // 改为数组存储多个风电机组
let clock = new THREE.Clock();

// 在全局变量部分添加
let pointerLockControls;
let moveForward = false;
let moveBackward = false;
let moveLeft = false;
let moveRight = false;
let moveUp = false;
let moveDown = false;
let velocity = new THREE.Vector3();
let direction = new THREE.Vector3();
let prevTime = performance.now();

// 在全局变量部分添加
let autoTourActive = false;
let tourStartTime = 0;
let currentTurbineIndex = 0;
let tourPhase = 0; // 0: 全景展示, 1: 拉近观察, 2: 环绕观察, 3: 拉远离开
let phaseStartTime = 0;
let tourMode = 'cinematic'; // 电影级漫游模式

// 在全局变量部分添加
let shipModels = [];


// 修改初始化函数中的相机设置
function init() {
    console.log('开始初始化Three.js场景');

    // 创建场景
    scene = new THREE.Scene();
    console.log('场景创建完成');

    //天空盒
    scene.background = new THREE.CubeTextureLoader()
        .setPath('./assets/sky/')
        .load(['px.jpg', 'nx.jpg', 'py.jpg', 'ny.jpg', 'pz.jpg', 'nz.jpg']);
    
    //环境光
    const ambientLight = new THREE.AmbientLight(0x666666, 20); // 柔和的白光
    scene.add(ambientLight);

    // 创建相机 - 调整位置以更好地展示浮标
    camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 5000);

    // 调整相机位置，使其能够完整展示浮标并位于中心
    const cameraRadius = 800; // 距离浮标的距离
    const cameraHeight = 200; // 相机高度
    const cameraRotationAngle = THREE.MathUtils.degToRad(0); // 正面视角

    const cameraX = cameraRadius * Math.sin(cameraRotationAngle);
    const cameraZ = cameraRadius * Math.cos(cameraRotationAngle);

    camera.position.set(cameraX, cameraHeight, cameraZ);
    camera.lookAt(0, 0, 0);  // 确保相机朝向场景中心
    console.log('相机创建完成，位置:', camera.position.x, camera.position.y, camera.position.z);

    //创建渲染器
    renderer = new THREE.WebGLRenderer({
        logarithmicDepthBuffer: true,
        preserveDrawingBuffer: true,
        antialias: true,
        stencil: true,
        powerPreference: 'high-performance',
        physicalCorrectLights: true,
        localClippingEnabled: true,
        alpha: true,
    });

    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.shadowMap.enabled = true;
    renderer.shadowMap.type = THREE.PCFSoftShadowMap;
    renderer.setClearColor(0x87CEEB, 1);

    // 确保canvas添加到正确的容器
    const container = document.getElementById('container');
    if (container) {
        container.appendChild(renderer.domElement);
        console.log('渲染器canvas已添加到container');
    } else {
        document.body.appendChild(renderer.domElement);
        console.log('渲染器canvas已添加到body');
    }

    // 设置canvas样式确保可见
    renderer.domElement.style.display = 'block';
    renderer.domElement.style.position = 'absolute';
    renderer.domElement.style.top = '0';
    renderer.domElement.style.left = '0';
    renderer.domElement.style.zIndex = '1';

    console.log('渲染器创建完成，canvas尺寸:', renderer.domElement.width, 'x', renderer.domElement.height);

    // 初始化指针锁定控制器
    if (typeof THREE.PointerLockControls !== 'undefined') {
        pointerLockControls = new THREE.PointerLockControls(camera, document.body);

        // 添加点击进入指针锁定的事件
        document.addEventListener('click', function () {
            if (pointerLockControls) {
                pointerLockControls.lock();
            }
        });

        // 添加键盘控制事件
        document.addEventListener('keydown', onKeyDown, false);
        document.addEventListener('keyup', onKeyUp, false);

        console.log('指针锁定控制器创建完成');
    } else {
        console.warn('PointerLockControls未加载，使用OrbitControls');
        // 保留原有的OrbitControls作为备选
        initOrbitControls();
    }

    // 添加相机控制 (OrbitControls 作为备选)
    function initOrbitControls() {
        if (typeof THREE.OrbitControls !== 'undefined') {
            controls = new THREE.OrbitControls(camera, renderer.domElement);
            controls.enableDamping = true;
            controls.dampingFactor = 0.05;
            controls.screenSpacePanning = false;
            controls.minDistance = 300;   // 增加最小距离，确保能看到整个浮标
            controls.maxDistance = 2000; // 最大距离
            controls.maxPolarAngle = Math.PI / 2 - 0.1; // 限制垂直旋转角度，防止看到水面以下
            controls.target.set(0, 0, 0);
            controls.addEventListener('change', function () {
                // 限制相机高度，防止进入水面以下
                if (camera.position.y < 10) {
                    camera.position.y = 10;
                }
            });
            console.log('相机控制器创建完成');
        } else {
            console.warn('OrbitControls未加载，跳过相机控制器');
        }
    }

    addLights();

    createOcean();  // 创建海洋
    loadBuoys(); // 加载浮标模型

    // 监听窗口大小变化
    window.addEventListener('resize', onWindowResize, false);

    console.log('Three.js场景初始化完成');
}
// 加载HDR环境纹理
function loadHDRTexture() {
    // 检查RGBELoader是否可用
    if (typeof THREE.RGBELoader === 'undefined') {
        console.warn('RGBELoader未加载，跳过HDR纹理加载');
        return;
    }

    const hdrLoader = new THREE.RGBELoader();
    hdrLoader.load("./textures/023.hdr", (texture) => {
        // 设置背景和环境纹理
        texture.mapping = THREE.EquirectangularReflectionMapping;
        scene.background = texture;
        scene.environment = texture;
        console.log('HDR纹理加载完成');
    }, undefined, (error) => {
        console.error('HDR纹理加载失败:', error);
    });
}

// 修改后的 createSkybox 函数：// 创建天空盒
function createSkybox() {
    const skyGeometry = new THREE.SphereGeometry(1800, 24, 18); // 增大天空盒半径
    const textureLoader = new THREE.TextureLoader().load('./textures/sky.jpg');
    textureLoader.colorSpace = THREE.SRGBColorSpace;
    // 创建天空材质（通常使用全景纹理）
    const skyMaterial = new THREE.MeshBasicMaterial({
        map: textureLoader,
        side: THREE.BackSide  // 重要：让材质渲染在球体内侧
    });

    // 创建天空网格
    const skySphere = new THREE.Mesh(skyGeometry, skyMaterial);
    scene.add(skySphere);
}
// 创建天空效果
function createSky() {
    // 注释掉Sky.js的高级天空效果

    sky = new THREE.Sky();
    sky.scale.setScalar(450000);
    scene.add(sky);

    // 创建太阳
    sun = new THREE.Vector3();

    // 配置天空参数（正午阳光设置）
    const skyUniforms = sky.material.uniforms;
    skyUniforms['turbidity'].value = 2; // 降低湍流度，营造清澈的正午天空
    skyUniforms['rayleigh'].value = 3; // 增强瑞利散射，让天空更蓝
    skyUniforms['mieCoefficient'].value = 0.005;
    skyUniforms['mieDirectionalG'].value = 0.8;

    // 设置太阳位置（正午阳光效果）
    const phi = THREE.MathUtils.degToRad(90 - 85); // 仰角 - 太阳接近天顶
    const theta = THREE.MathUtils.degToRad(0); // 方位角 - 正南方向

    sun.setFromSphericalCoords(1, phi, theta);
    skyUniforms['sunPosition'].value.copy(sun);


    // 使用sky.jpg作为天空盒纹理
    const textureLoader = new THREE.TextureLoader();
    textureLoader.load('./textures/sky.jpg', function (texture) {
        // 创建天空盒几何体
        const skyBoxGeometry = new THREE.SphereGeometry(2000, 32, 32);
        const skyBoxMaterial = new THREE.MeshBasicMaterial({
            map: texture,
            side: THREE.BackSide
        });
        const skyBox = new THREE.Mesh(skyBoxGeometry, skyBoxMaterial);
        scene.add(skyBox);
        console.log('Sky texture loaded as skybox');
    }, undefined, function (error) {
        console.error('Sky texture loading failed:', error);
        // 创建备用天空颜色
        const skyGeometry = new THREE.SphereGeometry(500, 32, 32);
        const skyMaterial = new THREE.MeshBasicMaterial({
            color: 0x87CEEB,
            side: THREE.BackSide
        });
        const sky = new THREE.Mesh(skyGeometry, skyMaterial);
        scene.add(sky);
        console.log('Fallback sky color created');
    });

    console.log('Sky created using sky.jpg texture');
}


// 创建海洋效果
function createOcean() {
    // 加载水面法线纹理
    const textureLoader = new THREE.TextureLoader();
    const waterNormals = textureLoader.load('./textures/waternormals.jpg', function (texture) {
        // 设置法线纹理的重复模式，增强水面效果
        texture.wrapS = texture.wrapT = THREE.RepeatWrapping;
        texture.repeat.set(2, 2); // 调整重复次数以控制波浪密度
        console.log('水面法线纹理加载成功');
    }, undefined, function (error) {
        console.error('水面法线纹理加载失败:', error);
    });

    // 设置法线纹理的包装模式（即使纹理加载失败也要设置默认值）
    waterNormals.wrapS = waterNormals.wrapT = THREE.RepeatWrapping;
    waterNormals.repeat.set(2, 2); // 增加重复次数以获得更细腻的波浪效果

    // 创建水面几何体，增大尺寸以匹配天空盒尺寸
    const waterGeometry = new THREE.PlaneGeometry(10600, 10600); // 比天空盒稍大以确保完全覆盖

    // 使用Water.js创建高级水面效果 
    // 其他碧绿色选项：
    // waterColor: 0x0077be, // 经典碧绿色
    // waterColor: 0x00a86b, // 绿松石色
    // waterColor: 0x2a52be, // 地中海蓝
    // waterColor: 0x008080, // 水鸭色
    // waterColor: 0x40e0d0, // 青绿色
    water = new THREE.Water(waterGeometry, {
        textureWidth: 512,
        textureHeight: 512,
        waterNormals: waterNormals,
        sunDirection: new THREE.Vector3(0.70707, 0.70707, 0.0),
        sunColor: 0xffffff,
        waterColor: 0x0077be,//0x001e0f 0x40e0d0
        distortionScale: 3.7, // 控制波浪的扭曲程度
        fog: scene.fog !== undefined,
        alpha: 0.8, // 水面透明度
        foam: 0.1 // 泡沫效果
    });

    water.rotation.x = -Math.PI / 2;
    water.position.y = 0; // 确保水面在y=0位置
    scene.add(water);

    // 将water赋值给全局ocean变量以保持兼容性
    ocean = water;

    console.log('高级水面效果创建完成，使用法线纹理增强波浪凹凸效果');
}
// 修改 addLights 函数，增强光照效果// 修改 addLights 函数，进一步增强光照效果
function addLights() {
    // 大幅增强环境光强度
    const ambientLight = new THREE.AmbientLight(0xffffff, 1.2); // 使用白色光，强度更高
    scene.add(ambientLight);

    // 主方向光（太阳光）- 进一步调整位置和强度
    const directionalLight = new THREE.DirectionalLight(0xffffff, 1.5); // 增加强度到1.5
    directionalLight.position.set(100, 150, 100); // 调整到更合理的位置
    directionalLight.castShadow = true;
    directionalLight.shadow.mapSize.width = 2048;
    directionalLight.shadow.mapSize.height = 2048;
    directionalLight.shadow.camera.near = 0.5;
    directionalLight.shadow.camera.far = 2000; // 增加远裁剪面
    directionalLight.shadow.camera.left = -800;
    directionalLight.shadow.camera.right = 800;
    directionalLight.shadow.camera.top = 800;
    directionalLight.shadow.camera.bottom = -800;
    scene.add(directionalLight);

    // 添加更强的补光 - 减少阴影
    const fillLight = new THREE.DirectionalLight(0xffffff, 0.8); // 增加补光强度到0.8
    fillLight.position.set(-100, 100, -100);
    scene.add(fillLight);

    // 添加天光 - 模拟天空反射
    const hemiLight = new THREE.HemisphereLight(0x80deea, 0x4caf50, 0.5); // 增加强度到0.5
    hemiLight.position.set(0, 200, 0);
    scene.add(hemiLight);

    // 添加背面光，确保模型背面也有光照
    const backLight = new THREE.DirectionalLight(0xffffff, 0.6);
    backLight.position.set(0, 50, -200);
    scene.add(backLight);
}

// 修改浮标加载函数，确保浮标更深地嵌入水下并增加调试信息
function loadBuoys() {
    console.log('开始加载科考浮标模型');

    // 确保已引入 GLTFLoader
    if (typeof THREE.GLTFLoader === 'undefined') {
        console.warn('GLTFLoader未定义，请确认已正确引入GLTFLoader');
        return;
    }

    const loader = new THREE.GLTFLoader();

    // 只加载一个浮标，放置在场景中心
    const position = { x: 250, z: 100 };

    let loadedCount = 0;

    loader.load(
        './models/科考船3.glb',
        function (gltf) {
            console.log('科考浮标模型加载成功');
            
            const object = gltf.scene;

            // 调整模型缩放和位置 - 根据GLB模型特点调整
            object.scale.set(10, 10, 10); // 保持合适的缩放比例
            
            // 将浮标位置设置在水下（y为负值表示在水面下方）
            object.position.set(position.x,-120, position.z);

          
             // 调整模型材质
            object.traverse(function (child) {
                if (child.isMesh) {
                    child.castShadow = true;
                    child.receiveShadow = true;
                    child.frustumCulled = false;

                    // 如果材质存在，调整其属性
                    if (child.material) {
                        // 增强材质亮度和自发光效果
                        child.material.emissive = new THREE.Color(0x555555); // 显著增加自发光强度
                        child.material.emissiveIntensity = 0.5; // 增加自发光强度

                        // 调整材质颜色，使其更亮
                        if (child.material.color) {
                            // 提亮原始颜色
                            child.material.color.multiplyScalar(1.5);
                        }

                        // 确保材质响应光照
                        if (child.material.type === 'MeshBasicMaterial') {
                            // 如果是基础材质，替换为标准材质
                            child.material = new THREE.MeshStandardMaterial({
                                color: child.material.color || 0xffffff,
                                map: child.material.map,
                                metalness: 0.2,
                                roughness: 0.5,
                                emissive: new THREE.Color(0x444444), // 添加自发光
                                emissiveIntensity: 0.4
                            });
                        } else if (child.material.type === 'MeshStandardMaterial') {
                            // 调整标准材质参数使其更亮
                            child.material.metalness = Math.max(0.1, child.material.metalness || 0.2);
                            child.material.roughness = Math.min(0.7, child.material.roughness || 0.5);
                            child.material.emissive = new THREE.Color(0x444444);
                            child.material.emissiveIntensity = 0.4; // 增加自发光强度
                        } else if (child.material.type === 'MeshLambertMaterial') {
                            // 对于Lambert材质也添加自发光
                            child.material.emissive = new THREE.Color(0x444444);
                            child.material.emissiveIntensity = 0.4;
                        }

                        // 确保材质更新
                        child.material.needsUpdate = true;
                    }
                }
            });


            // 添加到场景和数组
            scene.add(object);
            shipModels.push(object);

            loadedCount++;
            console.log('科考浮标模型加载完成！');
        },
        function (progress) {
            if (progress.total > 0) {
                const percent = (progress.loaded / progress.total * 100).toFixed(1);
                console.log(`科考浮标模型加载进度: ${percent}%`);
            }
        },
        function (error) {
            console.error('科考浮标模型加载失败:', error);
            loadedCount++;
        }
    );
}

// 修改船只动画函数，调整船只在水面上的位置
function animate() {
    requestAnimationFrame(animate);

    const time = clock.getElapsedTime();

    // 更新自动漫游（如果激活）
    updateAutoTour();

    // 原有的键盘控制逻辑（当自动漫游未激活时）
    if (!autoTourActive) {
        const delta = Math.min(0.1, (time - prevTime));

        // 如果使用指针锁定控制器且已锁定
        if (pointerLockControls && pointerLockControls.isLocked) {
            // 计算移动方向
            direction.z = Number(moveForward) - Number(moveBackward);
            direction.x = Number(moveRight) - Number(moveLeft);
            direction.y = Number(moveUp) - Number(moveDown);
            direction.normalize();

            // 设置移动速度
            const speed = 100.0;

            // 根据方向和速度更新速度向量
            if (moveForward || moveBackward) velocity.z -= direction.z * speed * delta;
            if (moveLeft || moveRight) velocity.x -= direction.x * speed * delta;
            if (moveUp || moveDown) velocity.y -= direction.y * speed * delta;

            // 应用阻尼（摩擦力）
            velocity.x -= velocity.x * 10.0 * delta;
            velocity.y -= velocity.y * 10.0 * delta;
            velocity.z -= velocity.z * 10.0 * delta;

            // 移动相机
            pointerLockControls.moveRight(-velocity.x * delta);
            pointerLockControls.moveForward(-velocity.z * delta);
            // 垂直移动
            camera.position.y -= velocity.y * delta;

            // 简单的高度限制
            if (camera.position.y < 5) {
                camera.position.y = 5;
                velocity.y = 0;
            }
            if (camera.position.y > 500) {
                camera.position.y = 500;
                velocity.y = 0;
            }
        }
        // 如果使用OrbitControls
        else if (controls) {
            controls.update();
        }

        prevTime = time;
    }

    // 在前几秒强制更新材质（解决材质加载延迟问题）
    if (time < 3 && shipModels.length > 0) {
        shipModels.forEach(model => {
            model.traverse(function (child) {
                if (child.isMesh && child.material) {
                    if (child.material.needsUpdate !== undefined) {
                        child.material.needsUpdate = true;
                    }
                    // 持续调整材质亮度
                    if (child.material.emissive) {
                        child.material.emissiveIntensity = 0.5;
                    }
                }
            });
        });
    }
    
    // 更新水面动画 - 增强水面波动效果
    if (water && water.material.uniforms) {
        // 通过改变time值来控制水面波动动画
        water.material.uniforms['time'].value += 1.0 / 60.0;
    }

    // 船只动画（如果有需要的话）
    if (shipModels.length > 0) {
        // shipModels.forEach((model) => {
        //     // 可以为船只添加浮动动画效果
        //     const time = clock.getElapsedTime();

        //     // 轻微的上下浮动效果
        //     model.position.y = Math.sin(time * 0.5) * 0.5;

        //     // 轻微的摇摆效果
        //     model.rotation.z = Math.sin(time * 0.3) * 0.02;
        //     model.rotation.x = Math.cos(time * 0.4) * 0.015;
        // });
    }
    
    // 渲染场景
    if (scene && camera && renderer) {
        renderer.render(scene, camera);

        // 每隔一段时间输出渲染信息
        if (Math.floor(time) % 5 === 0 && time % 1 < 0.1) {
            console.log('正在渲染场景，时间:', Math.floor(time), '场景对象数量:', scene.children.length);
        }
    } else {
        console.warn('场景、相机或渲染器未初始化');
    }
}
// 窗口大小变化处理
function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
}

// 页面加载完成后初始化
window.addEventListener('DOMContentLoaded', function () {
    console.log('DOM加载完成，开始初始化Three.js场景');

    // 检查Three.js是否加载
    if (typeof THREE === 'undefined') {
        console.error('Three.js未加载！');
        document.getElementById('loading').innerHTML = '错误：Three.js库未加载';
        return;
    }

    console.log('Three.js版本:', THREE.REVISION);

    // 隐藏加载提示
    const loadingElement = document.getElementById('loading');
    if (loadingElement) {
        loadingElement.style.display = 'none';
    }

    init();
    animate();
});

// 添加切换自动漫游的函数
function toggleAutoTour() {
    autoTourActive = !autoTourActive;

    if (autoTourActive) {
        tourStartTime = clock.getElapsedTime();
        phaseStartTime = tourStartTime;
        currentTurbineIndex = 0;
        tourPhase = 0;
        console.log('自动漫游已启动');
    } else {
        console.log('自动漫游已停止');
    }

    // 更新按钮文本
    const button = document.getElementById('tourButton');
    if (button) {
        button.textContent = autoTourActive ? '停止漫游' : '开始漫游';
    }

    return autoTourActive;
}


// 获取当前风机位置
function getCurrentTurbinePosition() {
    if (windTurbineModels.length > 0) {
        // 如果有多个风机，可以循环访问
        const turbine = windTurbineModels[currentTurbineIndex % windTurbineModels.length];
        return turbine.position.clone();
    }
    // 默认位置
    return new THREE.Vector3(0, 0, 0);
}
// 计算风机群的中心位置和边界
function getWindFarmBounds() {
    if (windTurbineModels.length === 0) {
        return { center: new THREE.Vector3(0, 0, 0), radius: 100 };
    }

    const positions = windTurbineModels.map(model => model.position);
    let minX = Infinity, maxX = -Infinity;
    let minZ = Infinity, maxZ = -Infinity;

    positions.forEach(pos => {
        minX = Math.min(minX, pos.x);
        maxX = Math.max(maxX, pos.x);
        minZ = Math.min(minZ, pos.z);
        maxZ = Math.max(maxZ, pos.z);
    });

    const center = new THREE.Vector3(
        (minX + maxX) / 2,
        0,
        (minZ + maxZ) / 2
    );

    const radius = Math.max(
        Math.abs(maxX - minX) / 2,
        Math.abs(maxZ - minZ) / 2
    ) * 1.5;

    return { center, radius };
}

// 电影级自动漫游逻辑
function updateCinematicTour() {
    if (!autoTourActive || windTurbineModels.length === 0) return;

    const elapsedTime = clock.getElapsedTime() - tourStartTime;
    const phaseElapsed = clock.getElapsedTime() - phaseStartTime;

    // 每个阶段持续时间（秒）
    const phaseDuration = 10; // 增加到10秒，给更多时间展示

    // 检查是否需要切换到下一个阶段
    if (phaseElapsed > phaseDuration) {
        tourPhase = (tourPhase + 1) % 4;
        phaseStartTime = clock.getElapsedTime();
        console.log(`切换到阶段 ${tourPhase}`);

        // 如果完成一轮，切换到下一个风机
        if (tourPhase === 0 && windTurbineModels.length > 1) {
            currentTurbineIndex = (currentTurbineIndex + 1) % windTurbineModels.length;
            console.log(`切换到风机 ${currentTurbineIndex + 1}`);
        }
    }

    const currentPhaseElapsed = clock.getElapsedTime() - phaseStartTime;
    const phaseProgress = Math.min(currentPhaseElapsed / phaseDuration, 1);

    // 获取当前风机位置
    const turbinePosition = getCurrentTurbinePosition();

    // 根据阶段设置相机位置和目标
    let cameraPosition, targetPosition;

    switch (tourPhase) {
        case 0: // 全景展示阶段 - 从高空俯视整个风机群，然后慢慢下降推进
            const bounds = getWindFarmBounds();
            // 初始位置在高空俯视整个风机群
            const initialHeight = bounds.radius;
            const finalHeight = bounds.radius * 0.3;
            const overviewDistance = bounds.radius * 0.8;

            // 相机从高空慢慢下降
            const currentHeight = initialHeight + (finalHeight - initialHeight) * phaseProgress;

            // 相机围绕风机群中心旋转并下降
            const overviewAngle = elapsedTime * 0.2;
            cameraPosition = new THREE.Vector3(
                bounds.center.x + Math.cos(overviewAngle) * overviewDistance,
                currentHeight,
                bounds.center.z + Math.sin(overviewAngle) * overviewDistance
            );
            targetPosition = bounds.center.clone();
            targetPosition.y = 30;
            break;

        case 1: // 拉近阶段 - 从远景慢慢拉近到当前风机叶片
            // 初始距离和高度
            const startDistance = 150;
            const endDistance = 40; // 更近的距离
            const startHeight = 40;
            const endHeight = 35; // 更低的高度，更接近叶片

            // 插值计算当前距离和高度
            const currentDistance = startDistance + (endDistance - startDistance) * phaseProgress;
            const currentHeightVal = startHeight + (endHeight - startHeight) * phaseProgress;

            // 相机从侧面接近风机，逐渐移动到正面
            const approachAngle = Math.PI / 2; // 从侧面到正面
            cameraPosition = new THREE.Vector3(
                turbinePosition.x + Math.cos(approachAngle) * currentDistance,
                turbinePosition.y + currentHeightVal,
                turbinePosition.z + Math.sin(approachAngle) * currentDistance
            );

            // 目标点逐渐从塔筒上部移动到叶片区域
            const targetHeight = 35 + Math.sin(phaseProgress * Math.PI) * 10;
            targetPosition = new THREE.Vector3(
                turbinePosition.x,
                turbinePosition.y + targetHeight,
                turbinePosition.z
            );
            break;

        case 2: // 叶片观察阶段 - 围绕风机叶片观察
            // 围绕风机叶片的路径，重点观察叶片
            const bladeOrbitRadius = 30; // 更小的半径，更接近叶片
            const bladeOrbitHeight = 30 + Math.sin(phaseProgress * Math.PI * 2) * 15; // 在叶片高度附近上下移动

            // 围绕风机做椭圆形运动，重点观察叶片
            const bladeAngle = elapsedTime * 0.6;
            cameraPosition = new THREE.Vector3(
                turbinePosition.x + Math.cos(bladeAngle) * bladeOrbitRadius * 1.5, // 椭圆轨道
                turbinePosition.y + bladeOrbitHeight,
                turbinePosition.z + Math.sin(bladeAngle) * bladeOrbitRadius
            );

            // 目标点跟踪叶片运动
            targetPosition = new THREE.Vector3(
                turbinePosition.x + Math.cos(bladeAngle * 2) * 10,
                turbinePosition.y + 35 + Math.sin(phaseProgress * Math.PI * 3) * 5,
                turbinePosition.z + Math.sin(bladeAngle * 2) * 10
            );
            break;

        case 3: // 拉远阶段 - 从风机拉远并准备切换到下一个
            // 从当前接近位置开始拉远
            const pullbackStartDistance = 40;
            const pullbackEndDistance = 150;
            const pullbackStartHeight = 35;
            const pullbackEndHeight = 70;

            // 插值计算当前距离和高度
            const pullbackDistance = pullbackStartDistance + (pullbackEndDistance - pullbackStartDistance) * phaseProgress;
            const pullbackHeight = pullbackStartHeight + (pullbackEndHeight - pullbackStartHeight) * phaseProgress;

            // 相机逐渐拉远并升高，同时移动到下一个风机的方向
            const pullbackAngle = Math.PI / 4 * phaseProgress; // 逐渐改变角度
            cameraPosition = new THREE.Vector3(
                turbinePosition.x + Math.cos(pullbackAngle) * pullbackDistance,
                turbinePosition.y + pullbackHeight,
                turbinePosition.z + Math.sin(pullbackAngle) * pullbackDistance
            );

            // 目标点逐渐移向下一个风机的方向
            targetPosition = new THREE.Vector3(
                turbinePosition.x,
                turbinePosition.y + 30,
                turbinePosition.z
            );
            break;
    }

    // 设置相机位置和朝向
    camera.position.copy(cameraPosition);
    camera.lookAt(targetPosition);
}


// 自动漫游逻辑（保持原有函数名以兼容调用）
function updateAutoTour() {
    updateCinematicTour();
}

// 添加键盘快捷键来切换自动漫游
function onKeyDown(event) {
    // 原有的键盘控制代码...
    switch (event.code) {
        case 'ArrowUp':
        case 'KeyW':
            moveForward = true;
            break;
        case 'ArrowLeft':
        case 'KeyA':
            moveLeft = true;
            break;
        case 'ArrowDown':
        case 'KeyS':
            moveBackward = true;
            break;
        case 'ArrowRight':
        case 'KeyD':
            moveRight = true;
            break;
        case 'KeyQ':
            moveUp = true;
            break;
        case 'KeyE':
            moveDown = true;
            break;
        case 'KeyT': // 按 T 键切换自动漫游
            const isActive = toggleAutoTour();
            console.log(`自动漫游 ${isActive ? '启动' : '停止'}`);
            break;
    }
}

function onKeyUp(event) {
    // 原有的键盘释放代码...
    switch (event.code) {
        case 'ArrowUp':
        case 'KeyW':
            moveForward = false;
            break;
        case 'ArrowLeft':
        case 'KeyA':
            moveLeft = false;
            break;
        case 'ArrowDown':
        case 'KeyS':
            moveBackward = false;
            break;
        case 'ArrowRight':
        case 'KeyD':
            moveRight = false;
            break;
        case 'KeyQ':
            moveUp = false;
            break;
        case 'KeyE':
            moveDown = false;
            break;
    }
}