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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 - Backdrop Water</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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+
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+ <div id="info">
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+ <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> WebGPU - Backdrop Water
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+ </div>
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+
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+ <script type="importmap">
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+ {
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+ "imports": {
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+ "three": "../build/three.module.js",
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+ "three/addons/": "./jsm/",
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+ "three/nodes": "./jsm/nodes/Nodes.js"
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+ }
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+ }
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+ </script>
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+
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+ <script type="module">
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+
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+ import * as THREE from 'three';
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+ import { color, depth, depthTexture, normalWorld, triplanarTexture, texture, viewportSharedTexture, mx_worley_noise_float, positionWorld, timerLocal, MeshStandardNodeMaterial, MeshBasicNodeMaterial } from 'three/nodes';
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+
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+ import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
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+
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+ import WebGPU from 'three/addons/capabilities/WebGPU.js';
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+ import WebGL from 'three/addons/capabilities/WebGL.js';
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+
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+ import WebGPURenderer from 'three/addons/renderers/webgpu/WebGPURenderer.js';
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+
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+ import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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+
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+ import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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+
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+ let camera, scene, renderer;
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+ let mixer, objects, clock;
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+ let model, floor, floorPosition;
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+
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+ init();
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+
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+ function init() {
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+
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+ if ( WebGPU.isAvailable() === false && WebGL.isWebGL2Available() === false ) {
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+
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+ document.body.appendChild( WebGPU.getErrorMessage() );
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+
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+ throw new Error( 'No WebGPU or WebGL2 support' );
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+
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+ }
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+
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+ camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.25, 30 );
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+ camera.position.set( 3, 3, 4 );
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+
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+ scene = new THREE.Scene();
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+ scene.fog = new THREE.Fog( 0x74ccf4, 7, 25 );
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+ scene.backgroundNode = normalWorld.y.mix( color( 0x74ccf4 ), color( 0x0066ff ) );
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+ camera.lookAt( 0, 1, 0 );
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+
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+ const sunLight = new THREE.DirectionalLight( 0xFFE499, 5 );
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+ sunLight.castShadow = true;
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+ sunLight.shadow.camera.near = .1;
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+ sunLight.shadow.camera.far = 3;
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+ sunLight.shadow.camera.right = 2;
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+ sunLight.shadow.camera.left = - 2;
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+ sunLight.shadow.camera.top = 2;
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+ sunLight.shadow.camera.bottom = - 2;
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+ sunLight.shadow.mapSize.width = 2048;
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+ sunLight.shadow.mapSize.height = 2048;
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+ sunLight.shadow.bias = - 0.001;
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+ sunLight.position.set( 1, 3, 1 );
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+
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+ const waterAmbientLight = new THREE.HemisphereLight( 0x333366, 0x74ccf4, 5 );
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+ const skyAmbientLight = new THREE.HemisphereLight( 0x74ccf4, 0, 1 );
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+
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+ scene.add( sunLight );
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+ scene.add( skyAmbientLight );
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+ scene.add( waterAmbientLight );
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+
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+ clock = new THREE.Clock();
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+
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+ // animated model
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+
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+ const loader = new GLTFLoader();
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+ loader.load( 'models/gltf/Michelle.glb', function ( gltf ) {
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+
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+ model = gltf.scene;
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+ model.children[ 0 ].children[ 0 ].castShadow = true;
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+
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+ mixer = new THREE.AnimationMixer( model );
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+
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+ const action = mixer.clipAction( gltf.animations[ 0 ] );
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+ action.play();
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+
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+ scene.add( model );
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+
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+ } );
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+
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+ // objects
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+
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+ const textureLoader = new THREE.TextureLoader();
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+ const brick_diffuse = textureLoader.load( './textures/brick_diffuse.jpg' );
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+ brick_diffuse.wrapS = THREE.RepeatWrapping;
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+ brick_diffuse.wrapT = THREE.RepeatWrapping;
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+ brick_diffuse.colorSpace = THREE.NoColorSpace;
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+
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+ const brick = triplanarTexture( texture( brick_diffuse ) );
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+
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+ const geometry = new THREE.TorusKnotGeometry( .6, 0.3, 128, 64 );
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+ const material = new MeshStandardNodeMaterial();
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+ material.colorNode = brick;
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+
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+ const count = 100;
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+ const scale = 3.5;
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+ const column = 10;
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+
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+ objects = new THREE.Group();
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+
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+ for ( let i = 0; i < count; i ++ ) {
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+
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+ const x = i % column;
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+ const y = i / column;
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+
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+ const mesh = new THREE.Mesh( geometry, material );
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+ mesh.position.set( x * scale, 0, y * scale );
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+ mesh.rotation.set( Math.random(), Math.random(), Math.random() );
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+ objects.add( mesh );
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+
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+ }
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+
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+ objects.position.set(
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+ ( ( column - 1 ) * scale ) * - .5,
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+ - .3,
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+ ( ( count / column ) * scale ) * - .5
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+ );
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+
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+ scene.add( objects );
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+
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+ // water
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+
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+ const depthEffect = depthTexture().distance( depth ).remapClamp( 0, .05 );
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+
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+ const timer = timerLocal( .8 );
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+ const floorUV = positionWorld.xzy;
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+
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+ const waterLayer0 = mx_worley_noise_float( floorUV.mul( 4 ).add( timer ) );
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+ const waterLayer1 = mx_worley_noise_float( floorUV.mul( 2 ).add( timer ) );
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+ const waterLayer2 = mx_worley_noise_float( floorUV.mul( 3 ).add( timer ) );
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+
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+ const waterIntensity = waterLayer0.mul( waterLayer1 ).mul( waterLayer2 ).mul( 5 );
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+ const waterColor = waterIntensity.mix( color( 0x0f5e9c ), color( 0x74ccf4 ) );
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+ const viewportTexture = viewportSharedTexture();
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+
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+ const waterMaterial = new MeshBasicNodeMaterial();
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+ waterMaterial.colorNode = waterColor;
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+ waterMaterial.backdropNode = depthEffect.mul( 3 ).min( 1.4 ).mix( viewportTexture, viewportTexture.mul( color( 0x74ccf4 ) ) );
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+ waterMaterial.backdropAlphaNode = depthEffect.oneMinus();
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+ waterMaterial.transparent = true;
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+
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+ const water = new THREE.Mesh( new THREE.BoxGeometry( 100, .001, 100 ), waterMaterial );
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+ water.position.set( 0, .8, 0 );
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+ scene.add( water );
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+
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+ // floor
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+
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+ floor = new THREE.Mesh( new THREE.BoxGeometry( 1.7, 10, 1.7 ), new MeshStandardNodeMaterial( { colorNode: brick } ) );
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+ floor.position.set( 0, - 5, 0 );
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+ scene.add( floor );
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+
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+ // caustics
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+
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+ const waterPosY = positionWorld.y.sub( water.position.y );
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+
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+ let transition = waterPosY.add( .1 ).saturate().oneMinus();
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+ transition = waterPosY.lessThan( 0 ).cond( transition, normalWorld.y.mix( transition, 0 ) ).toVar();
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+
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+ material.colorNode = transition.mix( material.colorNode, material.colorNode.add( waterLayer0 ) );
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+ floor.material.colorNode = material.colorNode;
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+
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+ // renderer
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+
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+ renderer = new WebGPURenderer( /*{ antialias: true }*/ );
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+ renderer.stencil = false;
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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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+
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+ const controls = new OrbitControls( camera, renderer.domElement );
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+ controls.minDistance = 1;
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+ controls.maxDistance = 10;
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+ controls.maxPolarAngle = Math.PI * 0.9;
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+ controls.target.set( 0, 1, 0 );
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+ controls.update();
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+
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+ // gui
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+
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+ const gui = new GUI();
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+
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+ floorPosition = new THREE.Vector3( 0, 1, 0 );
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+
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+ gui.add( floorPosition, 'y', 0, 2, .001 ).name( 'position' );
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+
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+ //
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+
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+ window.addEventListener( 'resize', onWindowResize );
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+
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+ }
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+
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+ function onWindowResize() {
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+
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+ camera.aspect = window.innerWidth / window.innerHeight;
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+ camera.updateProjectionMatrix();
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+
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+ renderer.setSize( window.innerWidth, window.innerHeight );
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+
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+ }
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+
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+ function animate() {
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+
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+ const delta = clock.getDelta();
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+
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+ floor.position.y = floorPosition.y - 5;
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+
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+ if ( model ) {
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+
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+ mixer.update( delta );
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+
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+ model.position.y = floorPosition.y;
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+
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+ }
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+
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+ for ( const object of objects.children ) {
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+
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+ object.position.y = Math.sin( clock.elapsedTime + object.id ) * .3;
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+ object.rotation.y += delta * .3;
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+
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+ }
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+
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+ renderer.render( scene, camera );
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+
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+ }
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+
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+ </script>
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+ </body>
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+</html>
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sunag
