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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - materials - lightmap</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>
<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>
<!-- 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 { OrbitControls } from 'three/addons/controls/OrbitControls.js';
const SCREEN_WIDTH = window.innerWidth;
const SCREEN_HEIGHT = window.innerHeight;
let container, stats;
let camera, scene, renderer;
await init();
animate();
async function init() {
container = document.createElement( 'div' );
document.body.appendChild( container );
// CAMERA
camera = new THREE.PerspectiveCamera( 40, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 10000 );
camera.position.set( 700, 200, - 500 );
// SCENE
scene = new THREE.Scene();
// LIGHTS
const light = new THREE.DirectionalLight( 0xaabbff, 0.3 );
light.position.x = 300;
light.position.y = 250;
light.position.z = - 500;
scene.add( light );
// 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: 400 },
exponent: { value: 0.6 }
};
uniforms.topColor.value.copy( light.color );
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 );
// RENDERER
renderer = new THREE.WebGLRenderer( { antialias: true } );
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
container.appendChild( renderer.domElement );
renderer.outputEncoding = THREE.sRGBEncoding;
// CONTROLS
const controls = new OrbitControls( camera, renderer.domElement );
controls.maxPolarAngle = 0.9 * Math.PI / 2;
controls.enableZoom = false;
// STATS
stats = new Stats();
container.appendChild( stats.dom );
// MODEL
const loader = new THREE.ObjectLoader();
const object = await loader.loadAsync( 'models/json/lightmap/lightmap.json' );
scene.add( object );
//
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
}
//
function animate() {
requestAnimationFrame( animate );
renderer.render( scene, camera );
stats.update();
}
</script>
</body>
</html>