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spotLights.js
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spotLights.js
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import {
WebGLRenderer,
ACESFilmicToneMapping,
PCFSoftShadowMap,
Scene,
EquirectangularReflectionMapping,
Box3,
Mesh,
CylinderGeometry,
MeshStandardMaterial,
BoxGeometry,
PerspectiveCamera,
} from 'three';
import { IESLoader } from 'three/examples/jsm/loaders/IESLoader.js';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js';
import { PhysicalSpotLight, WebGLPathTracer } from '../src/index.js';
import { RGBELoader } from 'three/examples/jsm/loaders/RGBELoader.js';
import { GUI } from 'three/examples/jsm/libs/lil-gui.module.min.js';
import { getScaledSettings } from './utils/getScaledSettings.js';
import { LoaderElement } from './utils/LoaderElement.js';
import { ParallelMeshBVHWorker } from 'three-mesh-bvh/src/workers/ParallelMeshBVHWorker.js';
const MODEL_URL = 'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/models/steampunk-robot/scene.gltf';
const ENV_URL = 'https://raw.githubusercontent.com/mrdoob/three.js/dev/examples/textures/equirectangular/royal_esplanade_1k.hdr';
const CREDITS = 'Model by Benedict Chew on Sketchfab';
const IES_PROFILE_URLS = [
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/0646706b3d2d9658994fc4ad80681dec.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/06b4cfdc8805709e767b5e2e904be8ad.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/007cfb11e343e2f42e3b476be4ab684e.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/01dac7d6c646814dcda6780e7b7b4566.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/108b32f07d6d38a7a6528a6d307440df.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/1aec5958092c236d005093ca27ebe378.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/02a7562c650498ebb301153dbbf59207.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/1a936937a49c63374e6d4fbed9252b29.ies',
'https://raw.githubusercontent.com/gkjohnson/3d-demo-data/main/ies/00c6ce79e1d2cdf3a1fb491aaaa47ae0.ies',
];
let pathTracer, renderer, controls;
let scene, camera, spotLight, iesTextures;
let loader;
// gui parameters
const params = {
multipleImportanceSampling: true,
bounces: 3,
renderScale: 1 / window.devicePixelRatio,
tiles: 2,
iesProfile: - 1,
...getScaledSettings(),
};
init();
async function init() {
loader = new LoaderElement();
loader.attach( document.body );
// renderer
renderer = new WebGLRenderer();
renderer.shadowMap.enabled = true;
renderer.physicallyCorrectLights = true;
renderer.shadowMap.type = PCFSoftShadowMap;
renderer.toneMapping = ACESFilmicToneMapping;
document.body.appendChild( renderer.domElement );
// path tracer
pathTracer = new WebGLPathTracer( renderer );
pathTracer.setBVHWorker( new ParallelMeshBVHWorker() );
pathTracer.tiles.set( params.tiles, params.tiles );
pathTracer.textureSize.set( 2048, 2048 );
pathTracer.filterGlossyFactor = 0.5;
// camera
const aspect = window.innerWidth / window.innerHeight;
camera = new PerspectiveCamera( 75, aspect, 0.025, 500 );
camera.position.set( - 2, 4, 8 ).multiplyScalar( 0.8 );
// controls
controls = new OrbitControls( camera, renderer.domElement );
controls.target.y = 1.5;
controls.update();
controls.addEventListener( 'change', () => pathTracer.updateCamera() );
// scene
scene = new Scene();
scene.backgroundBlurriness = 0.1;
scene.environmentIntensity = 0.1;
scene.backgroundIntensity = 0.1;
// load assets
const iesLoader = new IESLoader();
const [ envTexture, gltf, textures ] = await Promise.all( [
new RGBELoader().loadAsync( ENV_URL ),
new GLTFLoader().loadAsync( MODEL_URL ),
Promise.all( IES_PROFILE_URLS.map( url => iesLoader.loadAsync( url ) ) )
] );
// ies textures
iesTextures = textures;
// environment
envTexture.mapping = EquirectangularReflectionMapping;
scene.environment = envTexture;
scene.background = envTexture;
// objects
gltf.scene.scale.setScalar( 1 );
gltf.scene.updateMatrixWorld();
gltf.scene.traverse( c => {
c.castShadow = true;
c.receiveShadow = true;
} );
scene.add( gltf.scene );
const box = new Box3();
box.setFromObject( gltf.scene );
// init environment
const floor = new Mesh(
new CylinderGeometry( 8, 8, 0.5, 200 ),
new MeshStandardMaterial( { color: 0x555555, roughness: 0.05, metalness: 0.4 } ),
);
floor.geometry = floor.geometry.toNonIndexed();
floor.geometry.clearGroups();
floor.position.y = box.min.y - 0.25;
floor.receiveShadow = true;
floor.material.color.convertSRGBToLinear();
scene.add( floor );
const wall = new Mesh(
new BoxGeometry( 14, 6, 0.5 ),
new MeshStandardMaterial( { color: 0xa06464, roughness: 0.4, metalness: 0.1 } ),
);
wall.castShadow = true;
wall.receiveShadow = true;
wall.geometry = wall.geometry.toNonIndexed();
wall.geometry.clearGroups();
wall.position.x = 0.0;
wall.position.y = box.min.y + 3;
wall.position.z = box.min.z - 0.5;
wall.material.color.convertSRGBToLinear();
scene.add( wall );
// spot light
spotLight = new PhysicalSpotLight( 0xffffff );
spotLight.position.set( 0, 7.0, 4 );
spotLight.angle = Math.PI / 4.5;
spotLight.decay = 0;
spotLight.penumbra = 1.0;
spotLight.distance = 0.0;
spotLight.intensity = 50.0;
spotLight.radius = 0.5;
// spot light shadow
spotLight.shadow.mapSize.width = 512;
spotLight.shadow.mapSize.height = 512;
spotLight.shadow.camera.near = 0.1;
spotLight.shadow.camera.far = 10.0;
spotLight.shadow.focus = 1.0;
spotLight.castShadow = true;
scene.add( spotLight );
// spot light target
const targetObject = spotLight.target;
targetObject.position.x = 0;
targetObject.position.y = floor.position.y + 2;
targetObject.position.z = 0.05;
scene.add( targetObject );
await pathTracer.setSceneAsync( scene, camera, {
onProgress: v => loader.setPercentage( v ),
} );
loader.setCredits( CREDITS );
onParamsChange();
onResize();
window.addEventListener( 'resize', onResize );
// gui
const gui = new GUI();
const ptFolder = gui.addFolder( 'Path Tracing' );
ptFolder.add( params, 'multipleImportanceSampling' ).onChange( onParamsChange );
ptFolder.add( params, 'tiles', 1, 4, 1 ).onChange( value => {
pathTracer.tiles.set( value, value );
} );
ptFolder.add( params, 'bounces', 1, 30, 1 ).onChange( onParamsChange );
ptFolder.add( params, 'renderScale', 0.1, 1 ).onChange( onResize );
const lightFolder = gui.addFolder( 'Spot Light' );
lightFolder.addColor( spotLight, 'color' ).onChange( onParamsChange );
lightFolder.add( spotLight, 'intensity', 0.0, 200.0, 0.01 ).onChange( onParamsChange );
lightFolder.add( spotLight, 'radius', 0.0, 10.0 ).onChange( onParamsChange );
lightFolder.add( spotLight, 'decay', 0.0, 2.0 ).onChange( onParamsChange );
lightFolder.add( spotLight, 'distance', 0.0, 20.0 ).onChange( onParamsChange );
lightFolder.add( spotLight, 'angle', 0.0, Math.PI / 2.0 ).onChange( onParamsChange );
lightFolder.add( spotLight, 'penumbra', 0.0, 1.0 ).onChange( onParamsChange );
lightFolder.add( params, 'iesProfile', - 1, IES_PROFILE_URLS.length - 1, 1 ).onChange( v => {
spotLight.iesMap = v === - 1 ? null : iesTextures[ v ];
onParamsChange();
} );
animate();
}
function onResize() {
// TODO: we need to handle the interpolation of the float texture more intelligently to avoid
// extra bright hot spots - then this can be moved to "onParamsChange"
renderer.setSize( window.innerWidth, window.innerHeight );
renderer.setPixelRatio( window.devicePixelRatio * params.renderScale );
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
pathTracer.updateCamera();
}
function onParamsChange() {
// pathTracer.renderScale = params.renderScale;
pathTracer.multipleImportanceSampling = params.multipleImportanceSampling;
pathTracer.bounces = params.bounces;
pathTracer.updateLights();
}
function animate() {
requestAnimationFrame( animate );
camera.updateMatrixWorld();
pathTracer.renderSample();
loader.setSamples( pathTracer.samples );
}