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158 lines
4.3 KiB
HTML
158 lines
4.3 KiB
HTML
2 months ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgpu - skinning points</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 - skinning points</br>
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colors and scale of the points are based on the speed of the animation
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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 { color, computeSkinning, objectWorldMatrix, instancedArray, instanceIndex, Fn, shapeCircle } from 'three/tsl';
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import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
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let camera, scene, renderer;
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let mixer, clock;
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init();
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function init() {
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 300, - 85 );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x111111 );
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camera.lookAt( 0, 0, - 85 );
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scene.add( new THREE.AmbientLight( 0xffffff, 10 ) );
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clock = new THREE.Clock();
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const loader = new GLTFLoader();
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loader.load( 'models/gltf/Michelle.glb', function ( gltf ) {
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const object = gltf.scene;
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mixer = new THREE.AnimationMixer( object );
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const action = mixer.clipAction( gltf.animations[ 0 ] );
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action.play();
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object.traverse( function ( child ) {
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if ( child.isMesh ) {
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child.visible = false;
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const countOfPoints = child.geometry.getAttribute( 'position' ).count;
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const pointPositionArray = instancedArray( countOfPoints, 'vec3' ).setPBO( true );
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const pointSpeedArray = instancedArray( countOfPoints, 'vec3' ).setPBO( true );
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const pointSpeedAttribute = pointSpeedArray.toAttribute();
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const skinningPosition = computeSkinning( child );
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const materialPoints = new THREE.PointsNodeMaterial();
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materialPoints.colorNode = pointSpeedAttribute.mul( .6 ).mix( color( 0x0066ff ), color( 0xff9000 ) );
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materialPoints.opacityNode = shapeCircle();
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materialPoints.sizeNode = pointSpeedAttribute.length().exp().min( 5 ).mul( 5 ).add( 1 );
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materialPoints.sizeAttenuation = false;
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const updateSkinningPoints = Fn( () => {
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const pointPosition = pointPositionArray.element( instanceIndex );
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const pointSpeed = pointSpeedArray.element( instanceIndex );
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const skinningWorldPosition = objectWorldMatrix( child ).mul( skinningPosition );
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const skinningSpeed = skinningWorldPosition.sub( pointPosition );
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pointSpeed.assign( skinningSpeed );
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pointPosition.assign( skinningWorldPosition );
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}, 'void' );
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materialPoints.positionNode = Fn( () => {
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updateSkinningPoints();
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return pointPositionArray.toAttribute();
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} )().compute( countOfPoints ).onInit( () => {
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// initialize point positions and speeds
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renderer.compute( updateSkinningPoints().compute( countOfPoints ) );
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} );
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const pointCloud = new THREE.Sprite( materialPoints );
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pointCloud.count = countOfPoints;
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scene.add( pointCloud );
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}
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} );
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object.scale.set( 100, 100, 100 );
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object.rotation.x = - Math.PI / 2;
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scene.add( object );
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} );
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//renderer
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renderer = new THREE.WebGPURenderer( { antialias: true } );
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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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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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const delta = clock.getDelta();
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if ( mixer ) mixer.update( delta );
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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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