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Three.js and TypeScript
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Design Patterns in TypeScript
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Stats Panel

Video Lecture

Stats Panel Stats Panel Stats Panel

Description

Adding the Stats panel to the document using TypeScript.

Start Script

Begin the lesson using this client.ts below.

./src/client/client.ts

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import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'

const scene = new THREE.Scene()

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 OrbitControls(camera, renderer.domElement)
controls.addEventListener('change', render)

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()
}

// function animate() {
//     requestAnimationFrame(animate)

//     cube.rotation.x += 0.01
//     cube.rotation.y += 0.01

//     render()
// }

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

//animate()
render()

Final Scripts

Below is the client.ts how it is left at the end of the lesson.

./src/client/client.ts

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import * as THREE from 'three'
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import Stats from 'three/examples/jsm/libs/stats.module'

const scene = new THREE.Scene()

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 OrbitControls(camera, renderer.domElement)
//controls.addEventListener('change', render)

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)

    cube.rotation.x += 0.01
    cube.rotation.y += 0.01

    render()

    stats.update()
}

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

animate()
//render()

Boilerplate stats Branch

The official course boilerplate contains a branch including the Stats panel if you need.

You can clone the boilerplate into a new folder somewhere and checkout the stats branch.

git clone https://github.com/Sean-Bradley/Three.js-TypeScript-Boilerplate.git
cd Three.js-TypeScript-Boilerplate
git checkout stats
npm install
npm run dev

Visit http://127.0.0.1:8080/

With the Stats panel