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<!DOCTYPE html>
<html lang="en">
<head>
<title>threejs webgl - materials - physical - reflectivity</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<link type="text/css" rel="stylesheet" href="main.css">
</head>
<body>
<div id="container"></div>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">threejs</a> - Physical Material Reflectivity (reflectance at F0)<br/>
example by <a href="http://clara.io/" target="_blank" rel="noopener">Ben Houston</a>.
</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"three": "../build/three.module.js",
"three/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as THREE from 'three';
import Stats from 'three/addons/libs/stats.module.js';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { OBJLoader } from 'three/addons/loaders/OBJLoader.js';
import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
let container, stats;
const params = {
projection: 'normal',
autoRotate: true,
reflectivity: 1,
background: false,
exposure: 1,
gemColor: 'Green'
};
let camera, scene, renderer;
let gemBackMaterial, gemFrontMaterial;
const objects = [];
init();
animate();
function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
camera.position.set( 0.0, - 10, 20 * 3.5 );
scene = new THREE.Scene();
scene.background = new THREE.Color( 0x000000 );
renderer = new THREE.WebGLRenderer( { antialias: true } );
gemBackMaterial = new THREE.MeshPhysicalMaterial( {
map: null,
color: 0x0000ff,
metalness: 1,
roughness: 0,
opacity: 0.5,
side: THREE.BackSide,
transparent: true,
envMapIntensity: 5,
premultipliedAlpha: true
// TODO: Add custom blend mode that modulates background color by this materials color.
} );
gemFrontMaterial = new THREE.MeshPhysicalMaterial( {
map: null,
color: 0x0000ff,
metalness: 0,
roughness: 0,
opacity: 0.25,
side: THREE.FrontSide,
transparent: true,
envMapIntensity: 10,
premultipliedAlpha: true
} );
const loader = new OBJLoader();
loader.load( 'models/obj/emerald.obj', function ( object ) {
object.traverse( function ( child ) {
if ( child instanceof THREE.Mesh ) {
child.material = gemBackMaterial;
const second = child.clone();
second.material = gemFrontMaterial;
const parent = new THREE.Group();
parent.add( second );
parent.add( child );
scene.add( parent );
objects.push( parent );
}
} );
} );
new RGBELoader()
.setPath( 'textures/equirectangular/' )
.load( 'royal_esplanade_1k.hdr', function ( texture ) {
texture.mapping = THREE.EquirectangularReflectionMapping;
gemFrontMaterial.envMap = gemBackMaterial.envMap = texture;
gemFrontMaterial.needsUpdate = gemBackMaterial.needsUpdate = true;
} );
// Lights
scene.add( new THREE.AmbientLight( 0x222222 ) );
const pointLight1 = new THREE.PointLight( 0xffffff );
pointLight1.position.set( 150, 10, 0 );
pointLight1.castShadow = false;
scene.add( pointLight1 );
const pointLight2 = new THREE.PointLight( 0xffffff );
pointLight2.position.set( - 150, 0, 0 );
scene.add( pointLight2 );
const pointLight3 = new THREE.PointLight( 0xffffff );
pointLight3.position.set( 0, - 10, - 150 );
scene.add( pointLight3 );
const pointLight4 = new THREE.PointLight( 0xffffff );
pointLight4.position.set( 0, 0, 150 );
scene.add( pointLight4 );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.shadowMap.enabled = true;
renderer.toneMapping = THREE.ACESFilmicToneMapping;
container.appendChild( renderer.domElement );
renderer.outputEncoding = THREE.sRGBEncoding;
stats = new Stats();
container.appendChild( stats.dom );
const controls = new OrbitControls( camera, renderer.domElement );
controls.minDistance = 20;
controls.maxDistance = 200;
window.addEventListener( 'resize', onWindowResize );
const gui = new GUI();
gui.add( params, 'reflectivity', 0, 1 );
gui.add( params, 'exposure', 0, 2 );
gui.add( params, 'autoRotate' );
gui.add( params, 'gemColor', [ 'Blue', 'Green', 'Red', 'White', 'Black' ] );
gui.open();
}
function onWindowResize() {
const width = window.innerWidth;
const height = window.innerHeight;
camera.aspect = width / height;
camera.updateProjectionMatrix();
renderer.setSize( width, height );
}
//
function animate() {
requestAnimationFrame( animate );
stats.begin();
render();
stats.end();
}
function render() {
if ( gemBackMaterial !== undefined && gemFrontMaterial !== undefined ) {
gemFrontMaterial.reflectivity = gemBackMaterial.reflectivity = params.reflectivity;
let newColor = gemBackMaterial.color;
switch ( params.gemColor ) {
case 'Blue': newColor = new THREE.Color( 0x000088 ); break;
case 'Red': newColor = new THREE.Color( 0x880000 ); break;
case 'Green': newColor = new THREE.Color( 0x008800 ); break;
case 'White': newColor = new THREE.Color( 0x888888 ); break;
case 'Black': newColor = new THREE.Color( 0x0f0f0f ); break;
}
gemBackMaterial.color = gemFrontMaterial.color = newColor;
}
renderer.toneMappingExposure = params.exposure;
camera.lookAt( scene.position );
if ( params.autoRotate ) {
for ( let i = 0, l = objects.length; i < l; i ++ ) {
const object = objects[ i ];
object.rotation.y += 0.005;
}
}
renderer.render( scene, camera );
}
</script>
</body>
</html>