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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - shaders - sky sun shader</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="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - sky + sun shader
</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 { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
import { Sky } from 'three/addons/objects/Sky.js';
let camera, scene, renderer;
let sky, sun;
init();
render();
function initSky() {
// Add Sky
sky = new Sky();
sky.scale.setScalar( 450000 );
scene.add( sky );
sun = new THREE.Vector3();
/// GUI
const effectController = {
turbidity: 10,
rayleigh: 3,
mieCoefficient: 0.005,
mieDirectionalG: 0.7,
elevation: 2,
azimuth: 180,
exposure: renderer.toneMappingExposure
};
function guiChanged() {
const uniforms = sky.material.uniforms;
uniforms[ 'turbidity' ].value = effectController.turbidity;
uniforms[ 'rayleigh' ].value = effectController.rayleigh;
uniforms[ 'mieCoefficient' ].value = effectController.mieCoefficient;
uniforms[ 'mieDirectionalG' ].value = effectController.mieDirectionalG;
const phi = THREE.MathUtils.degToRad( 90 - effectController.elevation );
const theta = THREE.MathUtils.degToRad( effectController.azimuth );
sun.setFromSphericalCoords( 1, phi, theta );
uniforms[ 'sunPosition' ].value.copy( sun );
renderer.toneMappingExposure = effectController.exposure;
renderer.render( scene, camera );
}
const gui = new GUI();
gui.add( effectController, 'turbidity', 0.0, 20.0, 0.1 ).onChange( guiChanged );
gui.add( effectController, 'rayleigh', 0.0, 4, 0.001 ).onChange( guiChanged );
gui.add( effectController, 'mieCoefficient', 0.0, 0.1, 0.001 ).onChange( guiChanged );
gui.add( effectController, 'mieDirectionalG', 0.0, 1, 0.001 ).onChange( guiChanged );
gui.add( effectController, 'elevation', 0, 90, 0.1 ).onChange( guiChanged );
gui.add( effectController, 'azimuth', - 180, 180, 0.1 ).onChange( guiChanged );
gui.add( effectController, 'exposure', 0, 1, 0.0001 ).onChange( guiChanged );
guiChanged();
}
function init() {
camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 100, 2000000 );
camera.position.set( 0, 100, 2000 );
scene = new THREE.Scene();
const helper = new THREE.GridHelper( 10000, 2, 0xffffff, 0xffffff );
scene.add( helper );
renderer = new THREE.WebGLRenderer();
renderer.setPixelRatio( window.devicePixelRatio );
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.outputEncoding = THREE.sRGBEncoding;
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.toneMappingExposure = 0.5;
document.body.appendChild( renderer.domElement );
const controls = new OrbitControls( camera, renderer.domElement );
controls.addEventListener( 'change', render );
//controls.maxPolarAngle = Math.PI / 2;
controls.enableZoom = false;
controls.enablePan = false;
initSky();
window.addEventListener( 'resize', onWindowResize );
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
render();
}
function render() {
renderer.render( scene, camera );
}
</script>
</body>
</html>