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205 lines
6.2 KiB
HTML
205 lines
6.2 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgpu - earth</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js webgpu</a> - earth
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<br>
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Based on <a href="https://threejs-journey.com/lessons/earth-shaders" target="_blank" rel="noopener">Three.js Journey</a> lesson
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<br>
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Earth textures from <a href="https://www.solarsystemscope.com/textures/" target="_blank" rel="noopener">Solar System Scope</a> (resized and merged)
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</div>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.webgpu.js",
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"three/webgpu": "../build/three.webgpu.js",
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"three/tsl": "../build/three.tsl.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { step, normalWorldGeometry, output, texture, vec3, vec4, normalize, positionWorld, bumpMap, cameraPosition, color, uniform, mix, uv, max } from 'three/tsl';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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let camera, scene, renderer, controls, globe, clock;
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init();
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function init() {
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clock = new THREE.Clock();
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camera = new THREE.PerspectiveCamera( 25, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.set( 4.5, 2, 3 );
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scene = new THREE.Scene();
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// sun
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const sun = new THREE.DirectionalLight( '#ffffff', 2 );
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sun.position.set( 0, 0, 3 );
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scene.add( sun );
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// uniforms
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const atmosphereDayColor = uniform( color( '#4db2ff' ) );
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const atmosphereTwilightColor = uniform( color( '#bc490b' ) );
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const roughnessLow = uniform( 0.25 );
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const roughnessHigh = uniform( 0.35 );
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// textures
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const textureLoader = new THREE.TextureLoader();
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const dayTexture = textureLoader.load( './textures/planets/earth_day_4096.jpg' );
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dayTexture.colorSpace = THREE.SRGBColorSpace;
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dayTexture.anisotropy = 8;
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const nightTexture = textureLoader.load( './textures/planets/earth_night_4096.jpg' );
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nightTexture.colorSpace = THREE.SRGBColorSpace;
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nightTexture.anisotropy = 8;
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const bumpRoughnessCloudsTexture = textureLoader.load( './textures/planets/earth_bump_roughness_clouds_4096.jpg' );
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bumpRoughnessCloudsTexture.anisotropy = 8;
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// fresnel
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const viewDirection = positionWorld.sub( cameraPosition ).normalize();
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const fresnel = viewDirection.dot( normalWorldGeometry ).abs().oneMinus().toVar();
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// sun orientation
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const sunOrientation = normalWorldGeometry.dot( normalize( sun.position ) ).toVar();
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// atmosphere color
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const atmosphereColor = mix( atmosphereTwilightColor, atmosphereDayColor, sunOrientation.smoothstep( - 0.25, 0.75 ) );
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// globe
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const globeMaterial = new THREE.MeshStandardNodeMaterial();
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const cloudsStrength = texture( bumpRoughnessCloudsTexture, uv() ).b.smoothstep( 0.2, 1 );
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globeMaterial.colorNode = mix( texture( dayTexture ), vec3( 1 ), cloudsStrength.mul( 2 ) );
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const roughness = max(
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texture( bumpRoughnessCloudsTexture ).g,
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step( 0.01, cloudsStrength )
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);
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globeMaterial.roughnessNode = roughness.remap( 0, 1, roughnessLow, roughnessHigh );
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const night = texture( nightTexture );
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const dayStrength = sunOrientation.smoothstep( - 0.25, 0.5 );
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const atmosphereDayStrength = sunOrientation.smoothstep( - 0.5, 1 );
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const atmosphereMix = atmosphereDayStrength.mul( fresnel.pow( 2 ) ).clamp( 0, 1 );
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let finalOutput = mix( night.rgb, output.rgb, dayStrength );
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finalOutput = mix( finalOutput, atmosphereColor, atmosphereMix );
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globeMaterial.outputNode = vec4( finalOutput, output.a );
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const bumpElevation = max(
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texture( bumpRoughnessCloudsTexture ).r,
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cloudsStrength
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);
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globeMaterial.normalNode = bumpMap( bumpElevation );
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const sphereGeometry = new THREE.SphereGeometry( 1, 64, 64 );
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globe = new THREE.Mesh( sphereGeometry, globeMaterial );
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scene.add( globe );
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// atmosphere
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const atmosphereMaterial = new THREE.MeshBasicNodeMaterial( { side: THREE.BackSide, transparent: true } );
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let alpha = fresnel.remap( 0.73, 1, 1, 0 ).pow( 3 );
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alpha = alpha.mul( sunOrientation.smoothstep( - 0.5, 1 ) );
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atmosphereMaterial.outputNode = vec4( atmosphereColor, alpha );
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const atmosphere = new THREE.Mesh( sphereGeometry, atmosphereMaterial );
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atmosphere.scale.setScalar( 1.04 );
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scene.add( atmosphere );
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// debug
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const gui = new GUI();
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gui
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.addColor( { color: atmosphereDayColor.value.getHex( THREE.SRGBColorSpace ) }, 'color' )
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.onChange( ( value ) => {
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atmosphereDayColor.value.set( value );
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} )
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.name( 'atmosphereDayColor' );
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gui
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.addColor( { color: atmosphereTwilightColor.value.getHex( THREE.SRGBColorSpace ) }, 'color' )
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.onChange( ( value ) => {
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atmosphereTwilightColor.value.set( value );
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} )
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.name( 'atmosphereTwilightColor' );
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gui.add( roughnessLow, 'value', 0, 1, 0.001 ).name( 'roughnessLow' );
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gui.add( roughnessHigh, 'value', 0, 1, 0.001 ).name( 'roughnessHigh' );
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// renderer
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renderer = new THREE.WebGPURenderer();
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.setAnimationLoop( animate );
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document.body.appendChild( renderer.domElement );
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// controls
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controls = new OrbitControls( camera, renderer.domElement );
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controls.enableDamping = true;
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controls.minDistance = 0.1;
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controls.maxDistance = 50;
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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async function animate() {
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const delta = clock.getDelta();
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globe.rotation.y += delta * 0.025;
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controls.update();
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renderer.render( scene, camera );
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}
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</script>
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</body>
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</html>
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