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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgpu - custom fog</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</a> webgpu - custom fog
- </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 { color, fog, float, positionWorld, triNoise3D, positionView, normalWorld, uniform } from 'three/tsl';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- let camera, scene, renderer;
- let controls;
- init();
- function init() {
- camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 600 );
- camera.position.set( 30, 15, 30 );
- scene = new THREE.Scene();
- // custom fog
- const skyColor = color( 0xf0f5f5 );
- const groundColor = color( 0xd0dee7 );
- const fogNoiseDistance = positionView.z.negate().smoothstep( 0, camera.far - 300 );
- const distance = fogNoiseDistance.mul( 20 ).max( 4 );
- const alpha = .98;
- const groundFogArea = float( distance ).sub( positionWorld.y ).div( distance ).pow( 3 ).saturate().mul( alpha );
- // a alternative way to create a TimerNode
- const timer = uniform( 0 ).onFrameUpdate( ( frame ) => frame.time );
- const fogNoiseA = triNoise3D( positionWorld.mul( .005 ), 0.2, timer );
- const fogNoiseB = triNoise3D( positionWorld.mul( .01 ), 0.2, timer.mul( 1.2 ) );
- const fogNoise = fogNoiseA.add( fogNoiseB ).mul( groundColor );
- // apply custom fog
- scene.fogNode = fog( fogNoiseDistance.oneMinus().mix( groundColor, fogNoise ), groundFogArea );
- scene.backgroundNode = normalWorld.y.max( 0 ).mix( groundColor, skyColor );
- // builds
- const buildWindows = positionWorld.y.mul( 10 ).floor().mod( 4 ).sign().mix( color( 0x000066 ).add( fogNoiseDistance ), color( 0xffffff ) );
- const buildGeometry = new THREE.BoxGeometry( 1, 1, 1 );
- const buildMaterial = new THREE.MeshPhongNodeMaterial( {
- colorNode: buildWindows
- } );
- const buildMesh = new THREE.InstancedMesh( buildGeometry, buildMaterial, 4000 );
- scene.add( buildMesh );
- const dummy = new THREE.Object3D();
- const center = new THREE.Vector3();
- for ( let i = 0; i < buildMesh.count; i ++ ) {
- const scaleY = Math.random() * 7 + .5;
- dummy.position.x = Math.random() * 600 - 300;
- dummy.position.z = Math.random() * 600 - 300;
- const distance = Math.max( dummy.position.distanceTo( center ) * .012, 1 );
- dummy.position.y = .5 * scaleY * distance;
- dummy.scale.x = dummy.scale.z = Math.random() * 3 + .5;
- dummy.scale.y = scaleY * distance;
- dummy.updateMatrix();
- buildMesh.setMatrixAt( i, dummy.matrix );
- }
- // lights
- scene.add( new THREE.HemisphereLight( skyColor.value, groundColor.value, 0.5 ) );
- // geometry
- const planeGeometry = new THREE.PlaneGeometry( 200, 200 );
- const planeMaterial = new THREE.MeshPhongMaterial( {
- color: 0x999999
- } );
- const ground = new THREE.Mesh( planeGeometry, planeMaterial );
- ground.rotation.x = - Math.PI / 2;
- ground.scale.multiplyScalar( 3 );
- ground.castShadow = true;
- ground.receiveShadow = true;
- scene.add( ground );
- // renderer
- renderer = new THREE.WebGPURenderer( { antialias: 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.target.set( 0, 2, 0 );
- controls.minDistance = 7;
- controls.maxDistance = 100;
- controls.maxPolarAngle = Math.PI / 2;
- controls.autoRotate = true;
- controls.autoRotateSpeed = .1;
- controls.update();
- window.addEventListener( 'resize', resize );
- }
- function resize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- }
- function animate() {
- controls.update();
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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