Trackball Controls
Video Lecture
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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28 | 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()
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./src/client/client.ts
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72 | // If using Relative Import References
import * as THREE from '/build/three.module.js'
import { TrackballControls } from '/jsm/controls/TrackballControls'
import Stats from '/jsm/libs/stats.module'
// If using Module Specifiers
//import * as THREE from 'three'
//import { TrackballControls } from 'three/examples/jsm/controls/TrackballControls'
//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)
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();
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Useful Links
Retro Arcade Trackball Control
Expert Mouse Trackball Control
KeyCodes
