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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - lights - hemisphere light</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">
- <style>
- body {
- color: #444;
- }
- a {
- color: #08f;
- }
- </style>
- </head>
- <body>
- <div id="container"></div>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - webgl hemisphere light example<br/>
- flamingo by <a href="https://mirada.com/" target="_blank" rel="noopener">mirada</a> from <a href="http://www.ro.me" target="_blank" rel="noopener">ro.me</a>
- </div>
- <script type="x-shader/x-vertex" id="vertexShader">
- varying vec3 vWorldPosition;
- void main() {
- vec4 worldPosition = modelMatrix * vec4( position, 1.0 );
- vWorldPosition = worldPosition.xyz;
- gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
- }
- </script>
- <script type="x-shader/x-fragment" id="fragmentShader">
- uniform vec3 topColor;
- uniform vec3 bottomColor;
- uniform float offset;
- uniform float exponent;
- varying vec3 vWorldPosition;
- void main() {
- float h = normalize( vWorldPosition + offset ).y;
- gl_FragColor = vec4( mix( bottomColor, topColor, max( pow( max( h , 0.0), exponent ), 0.0 ) ), 1.0 );
- }
- </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 { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
- let camera, scene, renderer;
- const mixers = [];
- let stats;
- const clock = new THREE.Clock();
- init();
- function init() {
- const container = document.getElementById( 'container' );
- camera = new THREE.PerspectiveCamera( 30, window.innerWidth / window.innerHeight, 1, 5000 );
- camera.position.set( 0, 0, 250 );
- scene = new THREE.Scene();
- scene.background = new THREE.Color().setHSL( 0.6, 0, 1 );
- scene.fog = new THREE.Fog( scene.background, 1, 5000 );
- // LIGHTS
- const hemiLight = new THREE.HemisphereLight( 0xffffff, 0xffffff, 2 );
- hemiLight.color.setHSL( 0.6, 1, 0.6 );
- hemiLight.groundColor.setHSL( 0.095, 1, 0.75 );
- hemiLight.position.set( 0, 50, 0 );
- scene.add( hemiLight );
- const hemiLightHelper = new THREE.HemisphereLightHelper( hemiLight, 10 );
- scene.add( hemiLightHelper );
- //
- const dirLight = new THREE.DirectionalLight( 0xffffff, 3 );
- dirLight.color.setHSL( 0.1, 1, 0.95 );
- dirLight.position.set( - 1, 1.75, 1 );
- dirLight.position.multiplyScalar( 30 );
- scene.add( dirLight );
- dirLight.castShadow = true;
- dirLight.shadow.mapSize.width = 2048;
- dirLight.shadow.mapSize.height = 2048;
- const d = 50;
- dirLight.shadow.camera.left = - d;
- dirLight.shadow.camera.right = d;
- dirLight.shadow.camera.top = d;
- dirLight.shadow.camera.bottom = - d;
- dirLight.shadow.camera.far = 3500;
- dirLight.shadow.bias = - 0.0001;
- const dirLightHelper = new THREE.DirectionalLightHelper( dirLight, 10 );
- scene.add( dirLightHelper );
- // GROUND
- const groundGeo = new THREE.PlaneGeometry( 10000, 10000 );
- const groundMat = new THREE.MeshLambertMaterial( { color: 0xffffff } );
- groundMat.color.setHSL( 0.095, 1, 0.75 );
- const ground = new THREE.Mesh( groundGeo, groundMat );
- ground.position.y = - 33;
- ground.rotation.x = - Math.PI / 2;
- ground.receiveShadow = true;
- scene.add( ground );
- // SKYDOME
- const vertexShader = document.getElementById( 'vertexShader' ).textContent;
- const fragmentShader = document.getElementById( 'fragmentShader' ).textContent;
- const uniforms = {
- 'topColor': { value: new THREE.Color( 0x0077ff ) },
- 'bottomColor': { value: new THREE.Color( 0xffffff ) },
- 'offset': { value: 33 },
- 'exponent': { value: 0.6 }
- };
- uniforms[ 'topColor' ].value.copy( hemiLight.color );
- scene.fog.color.copy( uniforms[ 'bottomColor' ].value );
- const skyGeo = new THREE.SphereGeometry( 4000, 32, 15 );
- const skyMat = new THREE.ShaderMaterial( {
- uniforms: uniforms,
- vertexShader: vertexShader,
- fragmentShader: fragmentShader,
- side: THREE.BackSide
- } );
- const sky = new THREE.Mesh( skyGeo, skyMat );
- scene.add( sky );
- // MODEL
- const loader = new GLTFLoader();
- loader.load( 'models/gltf/Flamingo.glb', function ( gltf ) {
- const mesh = gltf.scene.children[ 0 ];
- const s = 0.35;
- mesh.scale.set( s, s, s );
- mesh.position.y = 15;
- mesh.rotation.y = - 1;
- mesh.castShadow = true;
- mesh.receiveShadow = true;
- scene.add( mesh );
- const mixer = new THREE.AnimationMixer( mesh );
- mixer.clipAction( gltf.animations[ 0 ] ).setDuration( 1 ).play();
- mixers.push( mixer );
- } );
- // RENDERER
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- container.appendChild( renderer.domElement );
- renderer.shadowMap.enabled = true;
- // STATS
- stats = new Stats();
- container.appendChild( stats.dom );
- //
- const params = {
- toggleHemisphereLight: function () {
- hemiLight.visible = ! hemiLight.visible;
- hemiLightHelper.visible = ! hemiLightHelper.visible;
- },
- toggleDirectionalLight: function () {
- dirLight.visible = ! dirLight.visible;
- dirLightHelper.visible = ! dirLightHelper.visible;
- },
- shadowIntensity: 1
- };
- const gui = new GUI();
- gui.add( params, 'toggleHemisphereLight' ).name( 'toggle hemisphere light' );
- gui.add( params, 'toggleDirectionalLight' ).name( 'toggle directional light' );
- gui.add( params, 'shadowIntensity', 0, 1 ).name( 'shadow intensity' ).onChange( ( value ) => {
- dirLight.shadow.intensity = value;
- } );
- gui.open();
- //
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- //
- function animate() {
- render();
- stats.update();
- }
- function render() {
- const delta = clock.getDelta();
- for ( let i = 0; i < mixers.length; i ++ ) {
- mixers[ i ].update( delta );
- }
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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