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BumpMap

Video Lecture

Bumpmap

Description

An image texture to create a bump map. Values alter the perceived depth in relation to the lights.

The Bump map doesn't actually affect the geometry of the object, only the lighting.

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Resources

The image files used in this lesson can be downloaded from the file named material-textures-3.zip. Extract the material-textures-3.zip contents into the ./dist/client/img/ folder.

material-textures-3.zip

Lesson Script

./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'
import { GUI } from 'dat.gui'

const scene = new THREE.Scene()
scene.add(new THREE.AxesHelper(5))

const light = new THREE.PointLight(0xffffff, 1000)
light.position.set(0, 5, 10)
scene.add(light)

const camera = new THREE.PerspectiveCamera(
    75,
    window.innerWidth / window.innerHeight,
    0.1,
    1000
)
camera.position.z = 1

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

const controls = new OrbitControls(camera, renderer.domElement)
controls.enableDamping = true

const planeGeometry = new THREE.PlaneGeometry(3.6, 1.8)

const material = new THREE.MeshPhongMaterial()

const texture = new THREE.TextureLoader().load('img/worldColour.5400x2700.jpg')
material.map = texture

const bumpTexture = new THREE.TextureLoader().load('img/earth_bumpmap.jpg')
material.bumpMap = bumpTexture
material.bumpScale = 0.015

const plane = new THREE.Mesh(planeGeometry, material)
scene.add(plane)

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 gui = new GUI()
gui.add(material, 'bumpScale', 0, 1, 0.01)

function animate() {
    requestAnimationFrame(animate)

    controls.update()

    render()

    stats.update()
}

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

animate()

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