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js实现360全景

2026-04-04 05:42:37JavaScript

使用Three.js实现360全景

安装Three.js库

npm install three

创建基础的HTML结构

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>360全景</title>
    <style>
        body { margin: 0; }
        canvas { display: block; }
    </style>
</head>
<body>
    <script src="path/to/three.js"></script>
    <script src="main.js"></script>
</body>
</html>

初始化场景和相机

在main.js中设置基础Three.js场景

js实现360全景

const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

加载全景图片

创建球体几何体并应用全景纹理

const geometry = new THREE.SphereGeometry(500, 60, 40);
geometry.scale(-1, 1, 1);

const texture = new THREE.TextureLoader().load('panorama.jpg');
const material = new THREE.MeshBasicMaterial({ map: texture });
const sphere = new THREE.Mesh(geometry, material);
scene.add(sphere);

添加交互控制

使用OrbitControls实现鼠标控制

js实现360全景

const controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.enableZoom = false;
controls.enablePan = false;
camera.position.set(0, 0, 0.1);

渲染循环

设置动画循环保持场景更新

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

响应式调整

添加窗口大小变化监听

window.addEventListener('resize', () => {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
});

性能优化建议

使用压缩的等距矩形全景图(JPEG格式) 考虑使用立方体贴图替代球体贴图以获得更好性能为移动设备添加陀螺仪支持

完整代码示例

// 初始化
const scene = new THREE.Scene();
const camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);
const renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

// 创建全景球体
const geometry = new THREE.SphereGeometry(500, 60, 40);
geometry.scale(-1, 1, 1);
const texture = new THREE.TextureLoader().load('panorama.jpg');
const material = new THREE.MeshBasicMaterial({ map: texture });
const sphere = new THREE.Mesh(geometry, material);
scene.add(sphere);

// 控制设置
const controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.enableZoom = false;
controls.enablePan = false;
camera.position.set(0, 0, 0.1);

// 动画循环
function animate() {
    requestAnimationFrame(animate);
    renderer.render(scene, camera);
    controls.update();
}
animate();

// 响应式调整
window.addEventListener('resize', () => {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
});