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 orbit past it's polar extremes. It won't flip to stay the right side up.
Lesson Script
./src/client/client.ts
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72 | import * as THREE from 'three'
import { TrackballControls } from 'three/examples/jsm/controls/TrackballControls'
import Stats from 'three/examples/jsm/libs/stats.module'
const scene = new THREE.Scene()
scene.add(new THREE.AxesHelper(5))
const camera = new THREE.PerspectiveCamera(
75,
window.innerWidth / window.innerHeight,
0.1,
1000
)
camera.position.z = 2
const renderer = 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 = ['KeyA', 'KeyS', 'KeyD']
// controls.noPan = true //default false
// controls.noRotate = true //default false
// controls.noZoom = true //default false
// controls.staticMoving = true //default false
// controls.dynamicDampingFactor = 0.1
// controls.maxDistance = 4
// controls.minDistance = 2
const geometry = new THREE.BoxGeometry()
const material = new THREE.MeshBasicMaterial({
color: 0x00ff00,
wireframe: true,
})
const cube = new THREE.Mesh(geometry, material)
scene.add(cube)
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)
function animate() {
requestAnimationFrame(animate)
// trackball controls needs to be updated in the animation loop before it will work
controls.update()
render()
stats.update()
}
function render() {
renderer.render(scene, camera)
}
animate()
|
Useful Links
TrackballControls (Official Documentation)
KeyboardEvent.code
Retro Arcade Trackball Control
Expert Mouse Trackball Control
