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- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Lots of Objects - Animated</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- color: white;
- }
- #c {
- width: 100%;
- height: 100%;
- display: block;
- }
- #ui {
- position: absolute;
- left: 1em;
- top: 1em;
- }
- #ui>div {
- font-size: 20pt;
- padding: 1em;
- display: inline-block;
- }
- #ui>div.selected {
- color: red;
- }
- @media (max-width: 700px) {
- #ui>div {
- display: block;
- padding: .25em;
- }
- }
- </style>
- </head>
- <body>
- <canvas id="c"></canvas>
- <div id="ui"></div>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- import TWEEN from 'three/addons/libs/tween.module.js';
- class TweenManger {
- constructor() {
- this.numTweensRunning = 0;
- }
- _handleComplete() {
- -- this.numTweensRunning;
- console.assert( this.numTweensRunning >= 0 ); /* eslint no-console: off */
- }
- createTween( targetObject ) {
- const self = this;
- ++ this.numTweensRunning;
- let userCompleteFn = () => {};
- // create a new tween and install our own onComplete callback
- const tween = new TWEEN.Tween( targetObject ).onComplete( function ( ...args ) {
- self._handleComplete();
- userCompleteFn.call( this, ...args );
- } );
- // replace the tween's onComplete function with our own
- // so we can call the user's callback if they supply one.
- tween.onComplete = ( fn ) => {
- userCompleteFn = fn;
- return tween;
- };
- return tween;
- }
- update() {
- TWEEN.update();
- return this.numTweensRunning > 0;
- }
- }
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const tweenManager = new TweenManger();
- const fov = 60;
- const aspect = 2; // the canvas default
- const near = 0.1;
- const far = 10;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.z = 2.5;
- const controls = new OrbitControls( camera, canvas );
- controls.enableDamping = true;
- controls.enablePan = false;
- controls.minDistance = 1.2;
- controls.maxDistance = 4;
- controls.update();
- const scene = new THREE.Scene();
- scene.background = new THREE.Color( 'black' );
- {
- const loader = new THREE.TextureLoader();
- const texture = loader.load( 'resources/images/world.jpg', render );
- texture.colorSpace = THREE.SRGBColorSpace;
- const geometry = new THREE.SphereGeometry( 1, 64, 32 );
- const material = new THREE.MeshBasicMaterial( { map: texture } );
- scene.add( new THREE.Mesh( geometry, material ) );
- }
- async function loadFile( url ) {
- const req = await fetch( url );
- return req.text();
- }
- function parseData( text ) {
- const data = [];
- const settings = { data };
- let max;
- let min;
- // split into lines
- text.split( '\n' ).forEach( ( line ) => {
- // split the line by whitespace
- const parts = line.trim().split( /\s+/ );
- if ( parts.length === 2 ) {
- // only 2 parts, must be a key/value pair
- settings[ parts[ 0 ] ] = parseFloat( parts[ 1 ] );
- } else if ( parts.length > 2 ) {
- // more than 2 parts, must be data
- const values = parts.map( ( v ) => {
- const value = parseFloat( v );
- if ( value === settings.NODATA_value ) {
- return undefined;
- }
- max = Math.max( max === undefined ? value : max, value );
- min = Math.min( min === undefined ? value : min, value );
- return value;
- } );
- data.push( values );
- }
- } );
- return Object.assign( settings, { min, max } );
- }
- function addBoxes( file, hueRange ) {
- const { min, max, data } = file;
- const range = max - min;
- // these helpers will make it easy to position the boxes
- // We can rotate the lon helper on its Y axis to the longitude
- const lonHelper = new THREE.Object3D();
- scene.add( lonHelper );
- // We rotate the latHelper on its X axis to the latitude
- const latHelper = new THREE.Object3D();
- lonHelper.add( latHelper );
- // The position helper moves the object to the edge of the sphere
- const positionHelper = new THREE.Object3D();
- positionHelper.position.z = 1;
- latHelper.add( positionHelper );
- // Used to move the center of the cube so it scales from the position Z axis
- const originHelper = new THREE.Object3D();
- originHelper.position.z = 0.5;
- positionHelper.add( originHelper );
- const color = new THREE.Color();
- const lonFudge = Math.PI * .5;
- const latFudge = Math.PI * - 0.135;
- const geometries = [];
- data.forEach( ( row, latNdx ) => {
- row.forEach( ( value, lonNdx ) => {
- if ( value === undefined ) {
- return;
- }
- const amount = ( value - min ) / range;
- const boxWidth = 1;
- const boxHeight = 1;
- const boxDepth = 1;
- const geometry = new THREE.BoxGeometry( boxWidth, boxHeight, boxDepth );
- // adjust the helpers to point to the latitude and longitude
- lonHelper.rotation.y = THREE.MathUtils.degToRad( lonNdx + file.xllcorner ) + lonFudge;
- latHelper.rotation.x = THREE.MathUtils.degToRad( latNdx + file.yllcorner ) + latFudge;
- // use the world matrix of the origin helper to
- // position this geometry
- positionHelper.scale.set( 0.005, 0.005, THREE.MathUtils.lerp( 0.01, 0.5, amount ) );
- originHelper.updateWorldMatrix( true, false );
- geometry.applyMatrix4( originHelper.matrixWorld );
- // compute a color
- const hue = THREE.MathUtils.lerp( ...hueRange, amount );
- const saturation = 1;
- const lightness = THREE.MathUtils.lerp( 0.4, 1.0, amount );
- color.setHSL( hue, saturation, lightness );
- // get the colors as an array of values from 0 to 255
- const rgb = color.toArray().map( v => v * 255 );
- // make an array to store colors for each vertex
- const numVerts = geometry.getAttribute( 'position' ).count;
- const itemSize = 3; // r, g, b
- const colors = new Uint8Array( itemSize * numVerts );
- // copy the color into the colors array for each vertex
- colors.forEach( ( v, ndx ) => {
- colors[ ndx ] = rgb[ ndx % 3 ];
- } );
- const normalized = true;
- const colorAttrib = new THREE.BufferAttribute( colors, itemSize, normalized );
- geometry.setAttribute( 'color', colorAttrib );
- geometries.push( geometry );
- } );
- } );
- const mergedGeometry = BufferGeometryUtils.mergeGeometries(
- geometries, false );
- const material = new THREE.MeshBasicMaterial( {
- vertexColors: true,
- transparent: true,
- opacity: 0,
- } );
- const mesh = new THREE.Mesh( mergedGeometry, material );
- scene.add( mesh );
- return mesh;
- }
- async function loadData( info ) {
- const text = await loadFile( info.url );
- info.file = parseData( text );
- }
- async function loadAll() {
- const fileInfos = [
- { name: 'men', hueRange: [ 0.7, 0.3 ], url: 'resources/data/gpw/gpw_v4_basic_demographic_characteristics_rev10_a000_014mt_2010_cntm_1_deg.asc' },
- { name: 'women', hueRange: [ 0.9, 1.1 ], url: 'resources/data/gpw/gpw_v4_basic_demographic_characteristics_rev10_a000_014ft_2010_cntm_1_deg.asc' },
- ];
- await Promise.all( fileInfos.map( loadData ) );
- function mapValues( data, fn ) {
- return data.map( ( row, rowNdx ) => {
- return row.map( ( value, colNdx ) => {
- return fn( value, rowNdx, colNdx );
- } );
- } );
- }
- function makeDiffFile( baseFile, otherFile, compareFn ) {
- let min;
- let max;
- const baseData = baseFile.data;
- const otherData = otherFile.data;
- const data = mapValues( baseData, ( base, rowNdx, colNdx ) => {
- const other = otherData[ rowNdx ][ colNdx ];
- if ( base === undefined || other === undefined ) {
- return undefined;
- }
- const value = compareFn( base, other );
- min = Math.min( min === undefined ? value : min, value );
- max = Math.max( max === undefined ? value : max, value );
- return value;
- } );
- // make a copy of baseFile and replace min, max, and data
- // with the new data
- return { ...baseFile, min, max, data };
- }
- // generate a new set of data
- {
- const menInfo = fileInfos[ 0 ];
- const womenInfo = fileInfos[ 1 ];
- const menFile = menInfo.file;
- const womenFile = womenInfo.file;
- function amountGreaterThan( a, b ) {
- return Math.max( a - b, 0 );
- }
- fileInfos.push( {
- name: '>50%men',
- hueRange: [ 0.6, 1.1 ],
- file: makeDiffFile( menFile, womenFile, ( men, women ) => {
- return amountGreaterThan( men, women );
- } ),
- } );
- fileInfos.push( {
- name: '>50% women',
- hueRange: [ 0.0, 0.4 ],
- file: makeDiffFile( womenFile, menFile, ( women, men ) => {
- return amountGreaterThan( women, men );
- } ),
- } );
- }
- function showFileInfo( fileInfos, fileInfo ) {
- fileInfos.forEach( ( info ) => {
- const durationInMs = 1000;
- const visible = fileInfo === info;
- // const scale = visible ? 1 : 0.1;
- const opacity = visible ? 1 : 0;
- info.elem.className = visible ? 'selected' : '';
- info.root.visible = visible || info.root.material.opacity > 0;
- tweenManager.createTween( info.root.material )
- .to( { opacity }, durationInMs )
- .start()
- .onComplete( () => {
- info.root.visible = visible;
- } );
- // tweenManager.createTween(info.root.material)
- // .to({depthWrite: visible}, 0)
- // .delay(durationInMs * .5)
- // .start();
- // tweenManager.createTween(info.root)
- // .to({visible}, 0)
- // .delay(durationInMs)
- // .start();
- // tweenManager.createTween(info.root.scale)
- // .to({x: scale, y: scale, z: scale}, durationInMs)
- // .start();
- } );
- requestRenderIfNotRequested();
- }
- const uiElem = document.querySelector( '#ui' );
- fileInfos.forEach( ( info ) => {
- const boxes = addBoxes( info.file, info.hueRange );
- info.root = boxes;
- // boxes.scale.set(0.1, 0.1, 0.1);
- const div = document.createElement( 'div' );
- info.elem = div;
- div.textContent = info.name;
- uiElem.appendChild( div );
- function show() {
- showFileInfo( fileInfos, info );
- }
- div.addEventListener( 'mouseover', show );
- div.addEventListener( 'touchstart', show );
- } );
- // show the first set of data
- showFileInfo( fileInfos, fileInfos[ 0 ] );
- }
- loadAll();
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- let renderRequested = false;
- function render() {
- renderRequested = undefined;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- if ( tweenManager.update() ) {
- requestRenderIfNotRequested();
- }
- controls.update();
- renderer.render( scene, camera );
- }
- render();
- function requestRenderIfNotRequested() {
- if ( ! renderRequested ) {
- renderRequested = true;
- requestAnimationFrame( render );
- }
- }
- controls.addEventListener( 'change', requestRenderIfNotRequested );
- window.addEventListener( 'resize', requestRenderIfNotRequested );
- }
- main();
- </script>
- </html>
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