Add the Initial Scripts

Tip

This course was updated in 2024. For the newer content, please visit Install Three.js and @three/types

Video Lecture

Description

Inside the folder ./src/client add a new file called client.ts and add this script below.

./src/client/client.ts

import * as THREE from 'three'

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 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()

./src/client/tsconfig.json

Also, inside the folder ./src/client add a new file called tsconfig.json and add this script below.

{
  "compilerOptions": {
    "target": "ES6",
    "moduleResolution": "node",
    "strict": true
  },
  "include": ["**/*.ts"]
}

Now when we look at ./src/client/client.ts again, the error messages are a little more clearer. Since three r126, typescript declarations are no longer included by default when you install Threejs using NPM.

To install the Threejs type declarations,

npm install @types/three --save-dev

Note that the folders ./src/server and ./dist/server are not used at this time in the course. But we have added them in preparation when we will later.

Your folder structure and files should now resemble,

|-- Three.js-TypeScript-Tutorial
    |-- dist
        |-- client
            |-- index.html
        |-- server
    |-- node_modules
        |-- @types
            |-- three
                |-- (Several extra files and folders containing the Three.js declarations)
        |-- three
            |-- (Several extra files and folders containing the Three.js source code)
    |-- src
        |-- client
            |-- client.ts
            |-- tsconfig.json
        |-- server
    |-- package.json
    |-- package-lock.json

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