STL Model Loader

Description

The STL model format is widely used for rapid prototyping, 3D printing and computer-aided manufacturing.

STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common 3d modelling attributes.

Code

./src/server/server.ts

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import express from "express"
import path from "path"
import http from "http"

const port: number = 3000

class App {
    private server: http.Server
    private port: number

    constructor(port: number) {
        this.port = port
        const app = express()
        app.use(express.static(path.join(__dirname, '../client')))
        app.use('/build/three.module.js', express.static(path.join(__dirname, '../../node_modules/three/build/three.module.js')))
        app.use('/jsm/controls/OrbitControls', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/controls/OrbitControls.js')))
        app.use('/jsm/loaders/STLLoader', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/loaders/STLLoader.js')))
        app.use('/jsm/libs/stats.module', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/libs/stats.module.js')))

        this.server = new http.Server(app);
    }

    public Start() {
        this.server.listen(this.port, () => {
            console.log(`Server listening on port ${this.port}.`)
        })
    }
}

new App(port).Start()

./src/client/client.ts

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import * as THREE from '/build/three.module.js'
import { OrbitControls } from '/jsm/controls/OrbitControls'
import { STLLoader } from '/jsm/loaders/STLLoader'
import Stats from '/jsm/libs/stats.module'

const scene: THREE.Scene = new THREE.Scene()

const axesHelper = new THREE.AxesHelper(5)
scene.add(axesHelper)

var light = new THREE.DirectionalLight();
light.position.set(2.5, 7.5, 15)
scene.add(light);

const camera: THREE.PerspectiveCamera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000)
camera.position.z = 3

const renderer: THREE.WebGLRenderer = new THREE.WebGLRenderer()
renderer.outputEncoding = THREE.sRGBEncoding
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

const controls = new OrbitControls(camera, renderer.domElement)
controls.enableDamping = true

const envTexture = new THREE.CubeTextureLoader().load(["img/px_25.jpg", "img/nx_25.jpg", "img/py_25.jpg", "img/ny_25.jpg", "img/pz_25.jpg", "img/nz_25.jpg"])
envTexture.mapping = THREE.CubeReflectionMapping

const material = new THREE.MeshPhysicalMaterial({
    color: 0xb2ffc8,
    envMap: envTexture,
    metalness: 1,
    roughness: 0,
    transparent: true,
    transmission: .99,
    side: THREE.DoubleSide
});

const loader = new STLLoader()
loader.load(
    'models/example.stl',
    function (geometry) {
        const mesh = new THREE.Mesh(geometry, material)
        scene.add(mesh)
    },
    (xhr) => {
        console.log((xhr.loaded / xhr.total * 100) + '% loaded')
    },
    (error) => {
        console.log(error);
    }
);

window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight
    camera.updateProjectionMatrix()
    renderer.setSize(window.innerWidth, window.innerHeight)
    render()
}

const stats = Stats()
document.body.appendChild(stats.dom)

var animate = function () {
    requestAnimationFrame(animate)

    controls.update()

    render()

    stats.update()
};

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