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SpecularMap

Video Lecture

SpecularMap

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Description

The SpecularMap is a texture image that affects the specular surface highlight on MeshLambertMaterial and MeshPhongMaterial materials.

To adjust the intensity of the specular surface highlight, on MeshPhongMaterial, use the specular and shininess properties.

Also on on the MeshPhongMaterial, to adjust the environment map intensity, use the materials reflectivity property.

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Resources

The image files used in this lesson can be downloaded from the file named material-textures-2.zip. Extract the material-textures-2.zip contents into the ./dist/client/img/ folder.

material-textures-2.zip

Start 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 = 3

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

const controls = new OrbitControls(camera, renderer.domElement)
//controls.screenSpacePanning = true // default is now true since three r118. Used so that panning up and down doesn't zoom in/out
//controls.addEventListener('change', render)

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

const material = new THREE.MeshPhongMaterial()

const texture = new THREE.TextureLoader().load('img/grid.png')
//const texture = new THREE.TextureLoader().load("img/worldColour.5400x2700.jpg")
material.map = texture
// const envTexture = new THREE.CubeTextureLoader().load(["img/px_50.png", "img/nx_50.png", "img/py_50.png", "img/ny_50.png", "img/pz_50.png", "img/nz_50.png"])
//const envTexture = new THREE.CubeTextureLoader().load(["img/px_eso0932a.jpg", "img/nx_eso0932a.jpg", "img/py_eso0932a.jpg", "img/ny_eso0932a.jpg", "img/pz_eso0932a.jpg", "img/nz_eso0932a.jpg"])
// envTexture.mapping = THREE.CubeReflectionMapping
// material.envMap = envTexture

//const specularTexture = new THREE.TextureLoader().load("img/grayscale-test.png")
//const specularTexture = new THREE.TextureLoader().load("img/earthSpecular.jpg")
//material.specularMap = specularTexture

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 options = {
  side: {
    FrontSide: THREE.FrontSide,
    BackSide: THREE.BackSide,
    DoubleSide: THREE.DoubleSide,
  },
  combine: {
    MultiplyOperation: THREE.MultiplyOperation,
    MixOperation: THREE.MixOperation,
    AddOperation: THREE.AddOperation,
  },
}
const gui = new GUI()

const materialFolder = gui.addFolder('THREE.Material')
materialFolder.add(material, 'transparent')
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()

const data = {
  color: material.color.getHex(),
  emissive: material.emissive.getHex(),
  specular: material.specular.getHex(),
}

const meshPhongMaterialFolder = gui.addFolder('THREE.MeshPhongMaterial')

meshPhongMaterialFolder.addColor(data, 'color').onChange(() => {
  material.color.setHex(Number(data.color.toString().replace('#', '0x')))
})
meshPhongMaterialFolder.addColor(data, 'emissive').onChange(() => {
  material.emissive.setHex(Number(data.emissive.toString().replace('#', '0x')))
})
meshPhongMaterialFolder.addColor(data, 'specular').onChange(() => {
  material.specular.setHex(Number(data.specular.toString().replace('#', '0x')))
})
meshPhongMaterialFolder.add(material, 'shininess', 0, 1024)
meshPhongMaterialFolder.add(material, 'wireframe')
meshPhongMaterialFolder.add(material, 'flatShading').onChange(() => updateMaterial())
meshPhongMaterialFolder.add(material, 'combine', options.combine).onChange(() => updateMaterial())
meshPhongMaterialFolder.add(material, 'reflectivity', 0, 1)
meshPhongMaterialFolder.open()

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

function animate() {
  requestAnimationFrame(animate)

  render()

  stats.update()
}

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

animate()

Final 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 = 3

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

const controls = new OrbitControls(camera, renderer.domElement)
controls.screenSpacePanning = true // default is now true since three r118. Used so that panning up and down doesn't zoom in/out
//controls.addEventListener('change', render)

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

const material = new THREE.MeshPhongMaterial()

//const texture = new THREE.TextureLoader().load("img/grid.png")
const texture = new THREE.TextureLoader().load('img/worldColour.5400x2700.jpg')
material.map = texture
// const envTexture = new THREE.CubeTextureLoader().load(["img/px_50.png", "img/nx_50.png", "img/py_50.png", "img/ny_50.png", "img/pz_50.png", "img/nz_50.png"])
const envTexture = new THREE.CubeTextureLoader().load(['img/px_eso0932a.jpg', 'img/nx_eso0932a.jpg', 'img/py_eso0932a.jpg', 'img/ny_eso0932a.jpg', 'img/pz_eso0932a.jpg', 'img/nz_eso0932a.jpg'])
envTexture.mapping = THREE.CubeReflectionMapping
material.envMap = envTexture

//const specularTexture = new THREE.TextureLoader().load("img/grayscale-test.png")
const specularTexture = new THREE.TextureLoader().load('img/earthSpecular.jpg')
material.specularMap = specularTexture

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 options = {
  side: {
    FrontSide: THREE.FrontSide,
    BackSide: THREE.BackSide,
    DoubleSide: THREE.DoubleSide,
  },
  combine: {
    MultiplyOperation: THREE.MultiplyOperation,
    MixOperation: THREE.MixOperation,
    AddOperation: THREE.AddOperation,
  },
}
const gui = new GUI()

const materialFolder = gui.addFolder('THREE.Material')
materialFolder.add(material, 'transparent')
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()

const data = {
  color: material.color.getHex(),
  emissive: material.emissive.getHex(),
  specular: material.specular.getHex(),
}

const meshPhongMaterialFolder = gui.addFolder('THREE.MeshPhongMaterial')

meshPhongMaterialFolder.addColor(data, 'color').onChange(() => {
  material.color.setHex(Number(data.color.toString().replace('#', '0x')))
})
meshPhongMaterialFolder.addColor(data, 'emissive').onChange(() => {
  material.emissive.setHex(Number(data.emissive.toString().replace('#', '0x')))
})
meshPhongMaterialFolder.addColor(data, 'specular').onChange(() => {
  material.specular.setHex(Number(data.specular.toString().replace('#', '0x')))
})
meshPhongMaterialFolder.add(material, 'shininess', 0, 1024)
meshPhongMaterialFolder.add(material, 'wireframe')
meshPhongMaterialFolder.add(material, 'flatShading').onChange(() => updateMaterial())
meshPhongMaterialFolder.add(material, 'combine', options.combine).onChange(() => updateMaterial())
meshPhongMaterialFolder.add(material, 'reflectivity', 0, 1)
meshPhongMaterialFolder.open()

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

function animate() {
  requestAnimationFrame(animate)

  render()

  stats.update()
}

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

animate()