DragControls

Video Lecture

Drag Controls Drag Controls

Description

Used to provide drag and drop interaction for your scene objects.

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/DragControls', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/controls/DragControls.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 { DragControls } from '/jsm/controls/DragControls'
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.PointLight(); 
light.position.set(10, 10, 10)
scene.add(light); 

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

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

const geometry: THREE.BoxGeometry = new THREE.BoxGeometry()
//const material: THREE.MeshPhongMaterial = new THREE.MeshPhongMaterial({ color: 0xff0000, transparent: true })
//const cube: THREE.Mesh = new THREE.Mesh(geometry, material)
//scene.add(cube)

const material: THREE.MeshPhongMaterial[] = [
    new THREE.MeshPhongMaterial({ color: 0xff0000, transparent: true }),
    new THREE.MeshPhongMaterial({ color: 0x00ff00, transparent: true }),
    new THREE.MeshPhongMaterial({ color: 0x0000ff, transparent: true })
]

const cubes: THREE.Mesh[] = [
    new THREE.Mesh(geometry, material[0]),
    new THREE.Mesh(geometry, material[1]),
    new THREE.Mesh(geometry, material[2])
]
cubes[0].position.x = -2
cubes[1].position.x = 0
cubes[2].position.x = 2
cubes.forEach(c => scene.add(c))

const controls = new DragControls(cubes, camera, renderer.domElement)
// controls.addEventListener('dragstart', function (event) {
//     event.object.material.opacity = 0.33
// })
// controls.addEventListener('dragend', function (event) {
//     event.object.material.opacity = 1
// })

camera.position.z = 3

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)

    cubes[0].rotation.x += 0.010;
    cubes[0].rotation.y += 0.011;
    cubes[1].rotation.x += 0.012;
    cubes[1].rotation.y += 0.013;
    cubes[2].rotation.x += 0.014;
    cubes[2].rotation.y += 0.015;
    //controls.update()

    render()

    stats.update()
}; 

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

animate();