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303 lines
9.1 KiB
HTML
303 lines
9.1 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgpu - volumetric lighting</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</a> webgpu - volumetric lighting
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<br>Improve the quality/performance adjusting the parameters in the Controls
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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 { vec3, Fn, time, texture3D, screenUV, uniform, screenCoordinate, pass } from 'three/tsl';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { ImprovedNoise } from 'three/addons/math/ImprovedNoise.js';
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import { TeapotGeometry } from 'three/addons/geometries/TeapotGeometry.js';
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import { bayer16 } from 'three/addons/tsl/math/Bayer.js';
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import { gaussianBlur } from 'three/addons/tsl/display/GaussianBlurNode.js';
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import Stats from 'three/addons/libs/stats.module.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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let renderer, scene, camera;
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let volumetricMesh, teapot, pointLight, spotLight;
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let postProcessing;
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let stats;
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init();
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function createTexture3D() {
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let i = 0;
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const size = 128;
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const data = new Uint8Array( size * size * size );
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const scale = 10;
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const perlin = new ImprovedNoise();
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const repeatFactor = 5.0;
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for ( let z = 0; z < size; z ++ ) {
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for ( let y = 0; y < size; y ++ ) {
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for ( let x = 0; x < size; x ++ ) {
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const nx = ( x / size ) * repeatFactor;
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const ny = ( y / size ) * repeatFactor;
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const nz = ( z / size ) * repeatFactor;
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const noiseValue = perlin.noise( nx * scale, ny * scale, nz * scale );
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data[ i ] = ( 128 + 128 * noiseValue );
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i ++;
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}
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}
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}
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const texture = new THREE.Data3DTexture( data, size, size, size );
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texture.format = THREE.RedFormat;
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texture.minFilter = THREE.LinearFilter;
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texture.magFilter = THREE.LinearFilter;
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texture.wrapS = THREE.RepeatWrapping;
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texture.wrapT = THREE.RepeatWrapping;
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texture.unpackAlignment = 1;
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texture.needsUpdate = true;
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return texture;
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}
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function init() {
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const LAYER_VOLUMETRIC_LIGHTING = 10;
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stats = new Stats();
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document.body.appendChild( stats.dom );
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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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renderer.toneMapping = THREE.NeutralToneMapping;
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renderer.toneMappingExposure = 2;
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renderer.shadowMap.enabled = true;
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document.body.appendChild( renderer.domElement );
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scene = new THREE.Scene();
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camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.set( - 8, 1, - 6 );
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.maxDistance = 40;
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controls.minDistance = 2;
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// Volumetric Fog Area
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const noiseTexture3D = createTexture3D();
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const smokeAmount = uniform( 2 );
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const volumetricMaterial = new THREE.VolumeNodeMaterial();
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volumetricMaterial.steps = 12;
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volumetricMaterial.offsetNode = bayer16( screenCoordinate ); // Add dithering to reduce banding
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volumetricMaterial.scatteringNode = Fn( ( { positionRay } ) => {
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// Return the amount of fog based on the noise texture
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const timeScaled = vec3( time, 0, time.mul( .3 ) );
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const sampleGrain = ( scale, timeScale = 1 ) => texture3D( noiseTexture3D, positionRay.add( timeScaled.mul( timeScale ) ).mul( scale ).mod( 1 ), 0 ).r.add( .5 );
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let density = sampleGrain( .1 );
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density = density.mul( sampleGrain( .05, 1 ) );
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density = density.mul( sampleGrain( .02, 2 ) );
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return smokeAmount.mix( 1, density );
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} );
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volumetricMesh = new THREE.Mesh( new THREE.BoxGeometry( 20, 10, 20 ), volumetricMaterial );
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volumetricMesh.receiveShadow = true;
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volumetricMesh.position.y = 2;
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volumetricMesh.layers.disableAll();
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volumetricMesh.layers.enable( LAYER_VOLUMETRIC_LIGHTING );
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scene.add( volumetricMesh );
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// Objects
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teapot = new THREE.Mesh( new TeapotGeometry( .8, 18 ), new THREE.MeshStandardMaterial( { color: 0xffffff, side: THREE.DoubleSide } ) );
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teapot.castShadow = true;
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scene.add( teapot );
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const floor = new THREE.Mesh( new THREE.PlaneGeometry( 100, 100 ), new THREE.MeshStandardMaterial( { color: 0xffffff } ) );
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floor.rotation.x = - Math.PI / 2;
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floor.position.y = - 3;
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floor.receiveShadow = true;
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scene.add( floor );
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// Lights
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pointLight = new THREE.PointLight( 0xf9bb50, 3, 100 );
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pointLight.castShadow = true;
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pointLight.position.set( 0, 1.4, 0 );
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pointLight.layers.enable( LAYER_VOLUMETRIC_LIGHTING );
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//lightBase.add( new THREE.Mesh( new THREE.SphereGeometry( 0.1, 16, 16 ), new THREE.MeshBasicMaterial( { color: 0xf9bb50 } ) ) );
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scene.add( pointLight );
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spotLight = new THREE.SpotLight( 0xffffff, 100 );
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spotLight.position.set( 2.5, 5, 2.5 );
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spotLight.angle = Math.PI / 6;
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spotLight.penumbra = 1;
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spotLight.decay = 2;
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spotLight.distance = 0;
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spotLight.map = new THREE.TextureLoader().setPath( 'textures/' ).load( 'colors.png' );
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spotLight.castShadow = true;
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spotLight.shadow.intensity = .98;
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spotLight.shadow.mapSize.width = 1024;
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spotLight.shadow.mapSize.height = 1024;
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spotLight.shadow.camera.near = 1;
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spotLight.shadow.camera.far = 15;
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spotLight.shadow.focus = 1;
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spotLight.shadow.bias = - .003;
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spotLight.layers.enable( LAYER_VOLUMETRIC_LIGHTING );
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//sunLight.add( new THREE.Mesh( new THREE.SphereGeometry( 0.1, 16, 16 ), new THREE.MeshBasicMaterial( { color: 0xffffff } ) ) );
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scene.add( spotLight );
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// Post-Processing
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postProcessing = new THREE.PostProcessing( renderer );
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// Layers
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const volumetricLightingIntensity = uniform( 1 );
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const volumetricLayer = new THREE.Layers();
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volumetricLayer.disableAll();
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volumetricLayer.enable( LAYER_VOLUMETRIC_LIGHTING );
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// Scene Pass
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const scenePass = pass( scene, camera );
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const sceneDepth = scenePass.getTextureNode( 'depth' );
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// Material - Apply occlusion depth of volumetric lighting based on the scene depth
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volumetricMaterial.depthNode = sceneDepth.sample( screenUV );
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// Volumetric Lighting Pass
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const volumetricPass = pass( scene, camera, { depthBuffer: false } );
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volumetricPass.setLayers( volumetricLayer );
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volumetricPass.setResolution( .25 );
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// Compose and Denoise
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const denoiseStrength = uniform( .6 );
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const blurredVolumetricPass = gaussianBlur( volumetricPass, denoiseStrength );
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const scenePassColor = scenePass.add( blurredVolumetricPass.mul( volumetricLightingIntensity ) );
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postProcessing.outputNode = scenePassColor;
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// GUI
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const params = {
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resolution: volumetricPass.getResolution(),
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denoise: true
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};
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const gui = new GUI();
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const rayMarching = gui.addFolder( 'Ray Marching' ).close();
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rayMarching.add( params, 'resolution', .1, .5 ).onChange( ( resolution ) => {
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volumetricPass.setResolution( resolution );
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} );
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rayMarching.add( volumetricMaterial, 'steps', 2, 12 ).name( 'step count' );
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rayMarching.add( denoiseStrength, 'value', 0, 1 ).name( 'denoise strength' );
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rayMarching.add( params, 'denoise' ).onChange( ( denoise ) => {
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const volumetric = denoise ? blurredVolumetricPass : volumetricPass;
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const scenePassColor = scenePass.add( volumetric.mul( volumetricLightingIntensity ) );
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postProcessing.outputNode = scenePassColor;
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postProcessing.needsUpdate = true;
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} );
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const lighting = gui.addFolder( 'Lighting / Scene' ).close();
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lighting.add( pointLight, 'intensity', 0, 6 ).name( 'light intensity' );
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lighting.add( spotLight, 'intensity', 0, 200 ).name( 'spot intensity' );
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lighting.add( volumetricLightingIntensity, 'value', 0, 2 ).name( 'fog intensity' );
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lighting.add( smokeAmount, 'value', 0, 3 ).name( 'smoke amount' );
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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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function animate() {
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stats.update();
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const time = performance.now() * 0.001;
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const scale = 2.4;
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pointLight.position.x = Math.sin( time * 0.7 ) * scale;
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pointLight.position.y = Math.cos( time * 0.5 ) * scale;
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pointLight.position.z = Math.cos( time * 0.3 ) * scale;
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spotLight.position.x = Math.cos( time * 0.3 ) * scale;
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spotLight.lookAt( 0, 0, 0 );
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teapot.rotation.y = time * 0.2;
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postProcessing.render();
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}
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</script>
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</body>
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</html>
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