You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
346 lines
10 KiB
346 lines
10 KiB
2 years ago
|
<!-- 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 - Multiple Datasets</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>
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<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';
|
||
|
|
|
||
|
|
function main() {
|
||
|
|
const canvas = document.querySelector('#c');
|
||
|
|
const renderer = new THREE.WebGLRenderer({canvas});
|
||
|
|
|
||
|
|
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);
|
||
|
|
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.mergeBufferGeometries(
|
||
|
|
geometries, false);
|
||
|
|
const material = new THREE.MeshBasicMaterial({
|
||
|
|
vertexColors: true,
|
||
|
|
});
|
||
|
|
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);
|
||
|
|
}),
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
// show the selected data, hide the rest
|
||
|
|
function showFileInfo(fileInfos, fileInfo) {
|
||
|
|
fileInfos.forEach((info) => {
|
||
|
|
const visible = fileInfo === info;
|
||
|
|
info.root.visible = visible;
|
||
|
|
info.elem.className = visible ? 'selected' : '';
|
||
|
|
});
|
||
|
|
requestRenderIfNotRequested();
|
||
|
|
}
|
||
|
|
|
||
|
|
const uiElem = document.querySelector('#ui');
|
||
|
|
fileInfos.forEach((info) => {
|
||
|
|
const boxes = addBoxes(info.file, info.hueRange);
|
||
|
|
info.root = boxes;
|
||
|
|
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();
|
||
|
|
}
|
||
|
|
|
||
|
|
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>
|
||
|
|
|