Materials

Video Lecture

Description

An introduction to the Three.js Material base class.

THREE.Material

All these classes below inherit methods and properties from the Material base class.

Start Scripts

This is the code at the beginning of the lesson.

Note

Since Three r138, if you modify the materials transparent property, then you also need to set its needsUpdate to true so that it re compiles.

./dist/client/index.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <title>
            Three.js TypeScript Tutorials by Sean Bradley :
            https://sbcode.net/threejs
        </title>
        <style>
            body {
                overflow: hidden;
                margin: 0px;
            }
        </style>
    </head>

    <body>
        <script type="module" src="bundle.js"></script>
    </body>
</html>

./src/client/client.ts

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

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 = 3

const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

new OrbitControls(camera, renderer.domElement)

const boxGeometry = new THREE.BoxGeometry()
const sphereGeometry = new THREE.SphereGeometry()
const icosahedronGeometry = new THREE.IcosahedronGeometry(1, 0)
const planeGeometry = new THREE.PlaneGeometry()
const torusKnotGeometry = new THREE.TorusKnotGeometry()

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

const cube = new THREE.Mesh(boxGeometry, material)
cube.position.x = 5
scene.add(cube)

const sphere = new THREE.Mesh(sphereGeometry, material)
sphere.position.x = 3
scene.add(sphere)

const icosahedron = new THREE.Mesh(icosahedronGeometry, material)
icosahedron.position.x = 0
scene.add(icosahedron)

const plane = new THREE.Mesh(planeGeometry, material)
plane.position.x = -2
scene.add(plane)

const torusKnot = new THREE.Mesh(torusKnotGeometry, material)
torusKnot.position.x = -5
scene.add(torusKnot)

window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight
    camera.updateProjectionMatrix()
    renderer.setSize(window.innerWidth, window.innerHeight)
    render()
}

const stats = new Stats()
document.body.appendChild(stats.dom)

// const options = {
//     side: {
//         "FrontSide": THREE.FrontSide,
//         "BackSide": THREE.BackSide,
//         "DoubleSide": THREE.DoubleSide,
//     }
// }

const gui = new GUI()
const materialFolder = gui.addFolder('THREE.Material')
// materialFolder.add(material, 'transparent').onChange(() => material.needsUpdate = true)
// materialFolder.add(material, 'opacity', 0, 1, 0.01)
// materialFolder.add(material, 'depthTest')
// materialFolder.add(material, 'depthWrite')
// materialFolder.add(material, 'alphaTest', 0, 1, 0.01).onChange(() => updateMaterial())
// materialFolder.add(material, 'visible')
// materialFolder.add(material, 'side', options.side).onChange(() => updateMaterial())
materialFolder.open()

// function updateMaterial() {
//     material.side = Number(material.side) as THREE.Side
//     material.needsUpdate = true
// }

function animate() {
    requestAnimationFrame(animate)

    render()

    stats.update()
}

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

animate()

Final Scripts

./src/client/client.ts

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

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 = 3

const renderer = new THREE.WebGLRenderer()
renderer.setSize(window.innerWidth, window.innerHeight)
document.body.appendChild(renderer.domElement)

new OrbitControls(camera, renderer.domElement)

const boxGeometry = new THREE.BoxGeometry()
const sphereGeometry = new THREE.SphereGeometry()
const icosahedronGeometry = new THREE.IcosahedronGeometry(1, 0)
const planeGeometry = new THREE.PlaneGeometry()
const torusKnotGeometry = new THREE.TorusKnotGeometry()

const material = new THREE.MeshBasicMaterial()
//const material= new THREE.MeshNormalMaterial()

const cube = new THREE.Mesh(boxGeometry, material)
cube.position.x = 5
scene.add(cube)

const sphere = new THREE.Mesh(sphereGeometry, material)
sphere.position.x = 3
scene.add(sphere)

const icosahedron = new THREE.Mesh(icosahedronGeometry, material)
icosahedron.position.x = 0
scene.add(icosahedron)

const plane = new THREE.Mesh(planeGeometry, material)
plane.position.x = -2
scene.add(plane)

const torusKnot = new THREE.Mesh(torusKnotGeometry, material)
torusKnot.position.x = -5
scene.add(torusKnot)

window.addEventListener('resize', onWindowResize, false)
function onWindowResize() {
    camera.aspect = window.innerWidth / window.innerHeight
    camera.updateProjectionMatrix()
    renderer.setSize(window.innerWidth, window.innerHeight)
    render()
}

const stats = new Stats()
document.body.appendChild(stats.dom)

const options = {
    side: {
        FrontSide: THREE.FrontSide,
        BackSide: THREE.BackSide,
        DoubleSide: THREE.DoubleSide,
    },
}

const gui = new GUI()
const materialFolder = gui.addFolder('THREE.Material')
materialFolder
    .add(material, 'transparent')
    .onChange(() => (material.needsUpdate = true))
materialFolder.add(material, 'opacity', 0, 1, 0.01)
materialFolder.add(material, 'depthTest')
materialFolder.add(material, 'depthWrite')
materialFolder
    .add(material, 'alphaTest', 0, 1, 0.01)
    .onChange(() => updateMaterial())
materialFolder.add(material, 'visible')
materialFolder
    .add(material, 'side', options.side)
    .onChange(() => updateMaterial())
materialFolder.open()

function updateMaterial() {
    material.side = Number(material.side) as THREE.Side
    material.needsUpdate = true
}

function animate() {
    requestAnimationFrame(animate)

    render()

    stats.update()
}

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

animate()

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