Transform Controls

Video Lecture

Transform Controls Transform Controls Transform Controls Transform Controls

Description

Allow you to change the transforms of an object within the scene.

You attach the controls to the object, and then add the controls to the scene, so that the interaction handles are visible.

And then you can rescale, rotate and re position the object within the scene.

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/TransformControls', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/controls/TransformControls.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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// If using Relative Import References
import * as THREE from '/build/three.module.js'
import { TransformControls } from '/jsm/controls/TransformControls'
import Stats from '/jsm/libs/stats.module'

// If using Module Specifiers
//import * as THREE from 'three'
//import { TransformControls } from 'three/examples/jsm/controls/TransformControls'
//import Stats from 'three/examples/jsm/libs/stats.module'

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

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)

renderer.domElement.ondragstart = function (event) { event.preventDefault(); return false; }

const geometry: THREE.BoxGeometry = new THREE.BoxGeometry()
const material: THREE.MeshNormalMaterial = new THREE.MeshNormalMaterial()

const cube: THREE.Mesh = new THREE.Mesh(geometry, material)
scene.add(cube)

const controls = new TransformControls(camera, renderer.domElement)
controls.attach(cube);
scene.add(controls);

window.addEventListener('keydown', function (event) {
    switch (event.key) {
        case "g":
            controls.setMode("translate")
            break
        case "r":
            controls.setMode("rotate")
            break
        case "s":
            controls.setMode("scale")
            break
    }
})

camera.position.z = 2

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)

    render()

    stats.update()
};

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

animate();