JavaScript加载导出STL文件的示例详解

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// 引入three.js库和STLLoader
import * as THREE from 'three';
import { STLLoader } from 'three/examples/jsm/loaders/STLLoader.js';

// 创建场景、相机和渲染器
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);

// 设置相机位置
camera.position.z = 5;

// 加载STL文件
const loader = new STLLoader();
loader.load('models/your-model.stl', function (geometry) {
    const material = new THREE.MeshStandardMaterial({ color: 0x00ff00 });
    const mesh = new THREE.Mesh(geometry, material);
    
    // 可选：调整模型大小
    mesh.scale.set(0.01, 0.01, 0.01);
    
    // 添加到场景
    scene.add(mesh);
    
    // 动画循环
    function animate() {
        requestAnimationFrame(animate);
        
        // 可选：添加一些基本动画
        mesh.rotation.x += 0.01;
        mesh.rotation.y += 0.01;
        
        renderer.render(scene, camera);
    }
    animate();
}, undefined, function (error) {
    console.error('An error happened during loading:', error);
});

// 处理窗口大小变化
window.addEventListener('resize', () => {
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize(window.innerWidth, window.innerHeight);
});

// 引入three.js库和STLExporter
import * as THREE from 'three';
import { STLExporter } from 'three/examples/jsm/exporters/STLExporter.js';

// 假设你有一个已经存在的网格对象 `mesh`
const exporter = new STLExporter();

// 导出为ASCII格式
function exportMeshToSTL(mesh) {
    const stlContent = exporter.parse(mesh, { binary: false });

    // 创建一个Blob对象
    const blob = new Blob([stlContent], { type: 'text/plain' });

    // 创建下载链接
    const link = document.createElement('a');
    link.href = URL.createObjectURL(blob);
    link.download = 'exported_model.stl';
    link.click();
}

// 调用函数导出网格
exportMeshToSTL(mesh);

// 如果你想导出为二进制格式，只需将 `binary` 参数设置为 `true`
function exportMeshToBinarySTL(mesh) {
    const stlContent = exporter.parse(mesh, { binary: true });

    // 创建一个Blob对象
    const blob = new Blob([stlContent], { type: 'application/octet-stream' });

    // 创建下载链接
    const link = document.createElement('a');
    link.href = URL.createObjectURL(blob);
    link.download = 'exported_model_binary.stl';
    link.click();
}

// 调用函数导出二进制格式的网格
exportMeshToBinarySTL(mesh);