Trackball Controls

Video Lecture

Trackball Controls Trackball Controls Trackball Controls

Description

TrackballControls is similar to OrbitControls. However, it does not maintain a constant camera up vector. That means that the camera can orbits past it's polar extremes. It won't flip to stay the right side up.

Start 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/TrackballControls', express.static(path.join(__dirname, '../../node_modules/three/examples/jsm/controls/TrackballControls.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 { TrackballControls } from '/jsm/controls/TrackballControls'
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.HemisphereLight();
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 controls = new TrackballControls(camera, renderer.domElement)
// controls.addEventListener('change', () => console.log("Controls Change"))
// controls.addEventListener('start', () => console.log("Controls Start Event"))
// controls.addEventListener('end', () => console.log("Controls End Event"))
// controls.enabled = false
// controls.rotateSpeed = 1.0;
// controls.zoomSpeed = 1.2;
// controls.panSpeed = 0.8;
// controls.keys = [65, 83, 68]
// controls.noPan = true //default false
// controls.noRotate = true //default false
// controls.noZoom = true //default false
// controls.staticMoving = true //default false
// controls.maxDistance = 4;
// controls.minDistance = 2;

const geometry: THREE.BoxGeometry = new THREE.BoxGeometry()
const material: THREE.MeshBasicMaterial = new THREE.MeshBasicMaterial({ color: 0x00ff00, wireframe: true })

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

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)

    controls.update()

    render()

    stats.update()
};

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

Retro Arcade Trackball Control

Expert Mouse Trackball Control

KeyCodes