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361 lines
11 KiB
HTML
361 lines
11 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgpu - procedural terrain</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 webgpu</a> - procedural terrain
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<br>
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Based on <a href="https://threejs-journey.com/lessons/procedural-terrain-shader" target="_blank" rel="noopener">Three.js Journey</a> lessons
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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 { mx_noise_float, color, cross, dot, float, transformNormalToView, positionLocal, sign, step, Fn, uniform, varying, vec2, vec3, Loop } from 'three/tsl';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { RGBELoader } from 'three/addons/loaders/RGBELoader.js';
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let camera, scene, renderer, controls, drag;
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init();
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function init() {
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camera = new THREE.PerspectiveCamera( 35, window.innerWidth / window.innerHeight, 0.1, 100 );
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camera.position.set( - 10, 8, - 2.2 );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0x201919 );
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const gui = new GUI();
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// environment
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const rgbeLoader = new RGBELoader();
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rgbeLoader.load( './textures/equirectangular/pedestrian_overpass_1k.hdr', ( environmentMap ) => {
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environmentMap.mapping = THREE.EquirectangularReflectionMapping;
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scene.background = environmentMap;
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scene.backgroundBlurriness = 0.5;
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scene.environment = environmentMap;
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} );
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// lights
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const directionalLight = new THREE.DirectionalLight( '#ffffff', 2 );
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directionalLight.position.set( 6.25, 3, 4 );
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directionalLight.castShadow = true;
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directionalLight.shadow.mapSize.set( 1024, 1024 );
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directionalLight.shadow.camera.near = 0.1;
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directionalLight.shadow.camera.far = 30;
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directionalLight.shadow.camera.top = 8;
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directionalLight.shadow.camera.right = 8;
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directionalLight.shadow.camera.bottom = - 8;
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directionalLight.shadow.camera.left = - 8;
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directionalLight.shadow.normalBias = 0.05;
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directionalLight.shadow.bias = 0;
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scene.add( directionalLight );
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// terrain
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const material = new THREE.MeshStandardNodeMaterial( {
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metalness: 0,
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roughness: 0.5,
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color: '#85d534'
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} );
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const noiseIterations = uniform( 3 );
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const positionFrequency = uniform( 0.175 );
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const warpFrequency = uniform( 6 );
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const warpStrength = uniform( 1 );
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const strength = uniform( 10 );
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const offset = uniform( vec2( 0, 0 ) );
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const normalLookUpShift = uniform( 0.01 );
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const colorSand = uniform( color( '#ffe894' ) );
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const colorGrass = uniform( color( '#85d534' ) );
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const colorSnow = uniform( color( '#ffffff' ) );
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const colorRock = uniform( color( '#bfbd8d' ) );
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const vNormal = varying( vec3() );
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const vPosition = varying( vec3() );
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const terrainElevation = Fn( ( [ position ] ) => {
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const warpedPosition = position.add( offset ).toVar();
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warpedPosition.addAssign( mx_noise_float( warpedPosition.mul( positionFrequency ).mul( warpFrequency ), 1, 0 ).mul( warpStrength ) );
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const elevation = float( 0 ).toVar();
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Loop( { type: 'float', start: float( 1 ), end: noiseIterations.toFloat(), condition: '<=' }, ( { i } ) => {
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const noiseInput = warpedPosition.mul( positionFrequency ).mul( i.mul( 2 ) ).add( i.mul( 987 ) );
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const noise = mx_noise_float( noiseInput, 1, 0 ).div( i.add( 1 ).mul( 2 ) );
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elevation.addAssign( noise );
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} );
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const elevationSign = sign( elevation );
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elevation.assign( elevation.abs().pow( 2 ).mul( elevationSign ).mul( strength ) );
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return elevation;
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} );
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material.positionNode = Fn( () => {
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// neighbours positions
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const neighbourA = positionLocal.xyz.add( vec3( normalLookUpShift, 0.0, 0.0 ) ).toVar();
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const neighbourB = positionLocal.xyz.add( vec3( 0.0, 0.0, normalLookUpShift.negate() ) ).toVar();
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// elevations
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const position = positionLocal.xyz.toVar();
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const elevation = terrainElevation( positionLocal.xz );
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position.y.addAssign( elevation );
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neighbourA.y.addAssign( terrainElevation( neighbourA.xz ) );
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neighbourB.y.addAssign( terrainElevation( neighbourB.xz ) );
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// compute normal
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const toA = neighbourA.sub( position ).normalize();
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const toB = neighbourB.sub( position ).normalize();
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vNormal.assign( cross( toA, toB ) );
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// varyings
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vPosition.assign( position.add( vec3( offset.x, 0, offset.y ) ) );
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return position;
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} )();
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material.normalNode = transformNormalToView( vNormal );
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material.colorNode = Fn( () => {
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const finalColor = colorSand.toVar();
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// grass
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const grassMix = step( - 0.06, vPosition.y );
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finalColor.assign( grassMix.mix( finalColor, colorGrass ) );
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// rock
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const rockMix = step( 0.5, dot( vNormal, vec3( 0, 1, 0 ) ) ).oneMinus().mul( step( - 0.06, vPosition.y ) );
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finalColor.assign( rockMix.mix( finalColor, colorRock ) );
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// snow
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const snowThreshold = mx_noise_float( vPosition.xz.mul( 25 ), 1, 0 ).mul( 0.1 ).add( 0.45 );
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const snowMix = step( snowThreshold, vPosition.y );
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finalColor.assign( snowMix.mix( finalColor, colorSnow ) );
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return finalColor;
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} )();
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const geometry = new THREE.PlaneGeometry( 10, 10, 500, 500 );
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geometry.deleteAttribute( 'uv' );
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geometry.deleteAttribute( 'normal' );
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geometry.rotateX( - Math.PI * 0.5 );
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const terrain = new THREE.Mesh( geometry, material );
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terrain.receiveShadow = true;
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terrain.castShadow = true;
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scene.add( terrain );
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// debug
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const terrainGui = gui.addFolder( '🏔️ terrain' );
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terrainGui.add( noiseIterations, 'value', 0, 10, 1 ).name( 'noiseIterations' );
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terrainGui.add( positionFrequency, 'value', 0, 1, 0.001 ).name( 'positionFrequency' );
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terrainGui.add( strength, 'value', 0, 20, 0.001 ).name( 'strength' );
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terrainGui.add( warpFrequency, 'value', 0, 20, 0.001 ).name( 'warpFrequency' );
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terrainGui.add( warpStrength, 'value', 0, 2, 0.001 ).name( 'warpStrength' );
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terrainGui.addColor( { color: colorSand.value.getHexString( THREE.SRGBColorSpace ) }, 'color' ).name( 'colorSand' ).onChange( value => colorSand.value.set( value ) );
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terrainGui.addColor( { color: colorGrass.value.getHexString( THREE.SRGBColorSpace ) }, 'color' ).name( 'colorGrass' ).onChange( value => colorGrass.value.set( value ) );
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terrainGui.addColor( { color: colorSnow.value.getHexString( THREE.SRGBColorSpace ) }, 'color' ).name( 'colorSnow' ).onChange( value => colorSnow.value.set( value ) );
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terrainGui.addColor( { color: colorRock.value.getHexString( THREE.SRGBColorSpace ) }, 'color' ).name( 'colorRock' ).onChange( value => colorRock.value.set( value ) );
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// water
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const water = new THREE.Mesh(
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new THREE.PlaneGeometry( 10, 10, 1, 1 ),
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new THREE.MeshPhysicalMaterial( {
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transmission: 1,
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roughness: 0.5,
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ior: 1.333,
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color: '#4db2ff'
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} )
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);
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water.rotation.x = - Math.PI * 0.5;
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water.position.y = - 0.1;
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scene.add( water );
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const waterGui = gui.addFolder( '💧 water' );
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waterGui.add( water.material, 'roughness', 0, 1, 0.01 );
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waterGui.add( water.material, 'ior' ).min( 1 ).max( 2 ).step( 0.001 );
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waterGui.addColor( { color: water.material.color.getHexString( THREE.SRGBColorSpace ) }, 'color' ).name( 'color' ).onChange( value => water.material.color.set( value ) );
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// renderer
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renderer = new THREE.WebGPURenderer( { antialias: true } );
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renderer.toneMapping = THREE.ACESFilmicToneMapping;
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renderer.shadowMap.enabled = 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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// controls
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controls = new OrbitControls( camera, renderer.domElement );
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controls.maxPolarAngle = Math.PI * 0.45;
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controls.target.y = - 0.5;
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controls.enableDamping = true;
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controls.minDistance = 0.1;
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controls.maxDistance = 50;
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// drag
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drag = {};
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drag.screenCoords = new THREE.Vector2();
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drag.prevWorldCoords = new THREE.Vector3();
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drag.worldCoords = new THREE.Vector3();
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drag.raycaster = new THREE.Raycaster();
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drag.down = false;
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drag.hover = false;
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drag.object = new THREE.Mesh( new THREE.PlaneGeometry( 10, 10, 1, 1 ), new THREE.MeshBasicMaterial() );
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drag.object.rotation.x = - Math.PI * 0.5;
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drag.object.visible = false;
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scene.add( drag.object );
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drag.getIntersect = () => {
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drag.raycaster.setFromCamera( drag.screenCoords, camera );
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const intersects = drag.raycaster.intersectObject( drag.object );
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if ( intersects.length )
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return intersects[ 0 ];
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return null;
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};
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drag.update = () => {
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const intersect = drag.getIntersect();
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if ( intersect ) {
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drag.hover = true;
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if ( ! drag.down )
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renderer.domElement.style.cursor = 'grab';
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} else {
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drag.hover = false;
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renderer.domElement.style.cursor = 'default';
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}
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if ( drag.hover && drag.down ) {
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drag.worldCoords.copy( intersect.point );
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const delta = drag.prevWorldCoords.sub( drag.worldCoords );
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offset.value.x += delta.x;
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offset.value.y += delta.z;
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}
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drag.prevWorldCoords.copy( drag.worldCoords );
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};
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window.addEventListener( 'pointermove', ( event ) => {
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drag.screenCoords.x = ( event.clientX / window.innerWidth - 0.5 ) * 2;
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drag.screenCoords.y = - ( event.clientY / window.innerHeight - 0.5 ) * 2;
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} );
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window.addEventListener( 'pointerdown', () => {
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if ( drag.hover ) {
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renderer.domElement.style.cursor = 'grabbing';
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controls.enabled = false;
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drag.down = true;
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drag.object.scale.setScalar( 10 );
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const intersect = drag.getIntersect();
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drag.prevWorldCoords.copy( intersect.point );
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drag.worldCoords.copy( intersect.point );
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}
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} );
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window.addEventListener( 'pointerup', () => {
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drag.down = false;
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controls.enabled = true;
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drag.object.scale.setScalar( 1 );
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} );
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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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async function animate() {
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controls.update();
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drag.update();
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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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