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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - angular slicing</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 webgpu</a> - angular slicing
- <br>
- Based on <a href="https://threejs-journey.com/lessons/sliced-model-shader" target="_blank" rel="noopener">Three.js Journey</a> lesson
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.webgpu.js",
- "three/tsl": "../build/three.webgpu.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { If, PI2, atan2, color, frontFacing, output, positionLocal, Fn, uniform, vec4 } from 'three/tsl';
- import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js';
- import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
- import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
- let camera, scene, renderer, controls;
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 0.1, 100 );
- camera.position.set( - 5, 5, 12 );
- scene = new THREE.Scene();
- const gui = new GUI();
- // environment
- const rgbeLoader = new RGBELoader();
- rgbeLoader.load( './textures/equirectangular/royal_esplanade_1k.hdr', ( environmentMap ) => {
- environmentMap.mapping = THREE.EquirectangularReflectionMapping;
- scene.background = environmentMap;
- scene.environment = environmentMap;
- } );
- // lights
- const directionalLight = new THREE.DirectionalLight( '#ffffff', 4 );
- directionalLight.position.set( 6.25, 3, 4 );
- directionalLight.castShadow = true;
- directionalLight.shadow.mapSize.set( 2048, 2048 );
- directionalLight.shadow.camera.near = 0.1;
- directionalLight.shadow.camera.far = 30;
- directionalLight.shadow.camera.top = 8;
- directionalLight.shadow.camera.right = 8;
- directionalLight.shadow.camera.bottom = - 8;
- directionalLight.shadow.camera.left = - 8;
- directionalLight.shadow.normalBias = 0.05;
- scene.add( directionalLight );
- // TSL functions
-
- const inAngle = Fn( ( [ position, angleStart, angleArc ] ) => {
- const angle = atan2( position.y, position.x ).sub( angleStart ).mod( PI2 ).toVar();
- return angle.greaterThan( 0 ).and( angle.lessThan( angleArc ) );
- } );
- // materials
- const defaultMaterial = new THREE.MeshPhysicalNodeMaterial( {
- metalness: 0.5,
- roughness: 0.25,
- envMapIntensity: 0.5,
- color: '#858080'
- } );
- const slicedMaterial = new THREE.MeshPhysicalNodeMaterial( {
- metalness: 0.5,
- roughness: 0.25,
- envMapIntensity: 0.5,
- color: '#858080',
- side: THREE.DoubleSide
- } );
- // uniforms
- const sliceStart = uniform( 1.75 );
- const sliceArc = uniform( 1.25 );
- const sliceColor = uniform( color( '#b62f58' ) );
- // debug
- gui.add( sliceStart, 'value', - Math.PI, Math.PI, 0.001 ).name( 'sliceStart' );
- gui.add( sliceArc, 'value', 0, Math.PI * 2, 0.001 ).name( 'sliceArc' );
- gui.addColor( { color: sliceColor.value.getHexString( THREE.SRGBColorSpace ) }, 'color' ).onChange( value => sliceColor.value.set( value ) );
- // output
- slicedMaterial.outputNode = Fn( () => {
- // discard
- inAngle( positionLocal.xy, sliceStart, sliceArc ).discard();
- // backface color
- const finalOutput = output;
- If( frontFacing.not(), () => {
- finalOutput.assign( vec4( sliceColor, 1 ) );
-
- } );
-
- return finalOutput;
-
- } )();
- // shadow
- slicedMaterial.shadowNode = Fn( () => {
- // discard
- inAngle( positionLocal.xy, sliceStart, sliceArc ).discard();
- return vec4( 0, 0, 0, 1 );
-
- } )();
- // model
- const dracoLoader = new DRACOLoader();
- dracoLoader.setDecoderPath( 'jsm/libs/draco/' );
- const gltfLoader = new GLTFLoader();
- gltfLoader.setDRACOLoader( dracoLoader );
- gltfLoader.load( './models/gltf/gears.glb', ( gltf ) => {
- const model = gltf.scene;
- model.traverse( ( child ) => {
- if ( child.isMesh ) {
- if ( child.name === 'outerHull' )
- child.material = slicedMaterial;
- else
- child.material = defaultMaterial;
- child.castShadow = true;
- child.receiveShadow = true;
-
- }
- } );
- scene.add( model );
-
- } );
- // plane
- const plane = new THREE.Mesh(
- new THREE.PlaneGeometry( 10, 10, 10 ),
- new THREE.MeshStandardMaterial( { color: '#aaaaaa' } )
- );
- plane.receiveShadow = true;
- plane.position.set( - 4, - 3, - 4 );
- plane.lookAt( new THREE.Vector3( 0, 0, 0 ) );
- scene.add( plane );
- // renderer
- renderer = new THREE.WebGPURenderer( { antialias: true } );
- renderer.toneMapping = THREE.ACESFilmicToneMapping;
- renderer.toneMappingExposure = 1;
- renderer.shadowMap.enabled = true;
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.setAnimationLoop( animate );
- document.body.appendChild( renderer.domElement );
- // controls
- controls = new OrbitControls( camera, renderer.domElement );
- controls.enableDamping = true;
- controls.minDistance = 0.1;
- controls.maxDistance = 50;
- window.addEventListener( 'resize', onWindowResize );
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- async function animate() {
-
- controls.update();
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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