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.
421 lines
13 KiB
421 lines
13 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 - Indexed Textures - Random Colors</title>
|
||
|
|
<style>
|
||
|
|
html, body {
|
||
|
|
height: 100%;
|
||
|
|
margin: 0;
|
||
|
|
font-family: sans-serif;
|
||
|
|
}
|
||
|
|
#c {
|
||
|
|
width: 100%; /* let our container decide our size */
|
||
|
|
height: 100%;
|
||
|
|
display: block;
|
||
|
|
}
|
||
|
|
#container {
|
||
|
|
position: relative; /* makes this the origin of its children */
|
||
|
|
width: 100%;
|
||
|
|
height: 100%;
|
||
|
|
overflow: hidden;
|
||
|
|
}
|
||
|
|
#labels {
|
||
|
|
position: absolute; /* let us position ourself inside the container */
|
||
|
|
z-index: 0; /* make a new stacking context so children don't sort with rest of page */
|
||
|
|
left: 0; /* make our position the top left of the container */
|
||
|
|
top: 0;
|
||
|
|
color: white;
|
||
|
|
}
|
||
|
|
#labels>div {
|
||
|
|
position: absolute; /* let us position them inside the container */
|
||
|
|
left: 0; /* make their default position the top left of the container */
|
||
|
|
top: 0;
|
||
|
|
cursor: pointer; /* change the cursor to a hand when over us */
|
||
|
|
font-size: small;
|
||
|
|
user-select: none; /* don't let the text get selected */
|
||
|
|
pointer-events: none; /* make us invisible to the pointer */
|
||
|
|
text-shadow: /* create a black outline */
|
||
|
|
-1px -1px 0 #000,
|
||
|
|
0 -1px 0 #000,
|
||
|
|
1px -1px 0 #000,
|
||
|
|
1px 0 0 #000,
|
||
|
|
1px 1px 0 #000,
|
||
|
|
0 1px 0 #000,
|
||
|
|
-1px 1px 0 #000,
|
||
|
|
-1px 0 0 #000;
|
||
|
|
}
|
||
|
|
#labels>div:hover {
|
||
|
|
color: red;
|
||
|
|
}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<div id="container">
|
||
|
|
<canvas id="c"></canvas>
|
||
|
|
<div id="labels"></div>
|
||
|
|
</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 {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('#246');
|
||
|
|
|
||
|
|
const pickingScene = new THREE.Scene();
|
||
|
|
pickingScene.background = new THREE.Color(0);
|
||
|
|
|
||
|
|
const maxNumCountries = 512;
|
||
|
|
const paletteTextureWidth = maxNumCountries;
|
||
|
|
const paletteTextureHeight = 1;
|
||
|
|
const palette = new Uint8Array(paletteTextureWidth * 4);
|
||
|
|
const paletteTexture = new THREE.DataTexture(palette, paletteTextureWidth, paletteTextureHeight);
|
||
|
|
paletteTexture.minFilter = THREE.NearestFilter;
|
||
|
|
paletteTexture.magFilter = THREE.NearestFilter;
|
||
|
|
for (let i = 1; i < palette.length; ++i) {
|
||
|
|
palette[i] = Math.random() * 256;
|
||
|
|
}
|
||
|
|
// set the ocean color (index #0)
|
||
|
|
palette.set([100, 200, 255, 255], 0);
|
||
|
|
paletteTexture.needsUpdate = true;
|
||
|
|
|
||
|
|
{
|
||
|
|
const loader = new THREE.TextureLoader();
|
||
|
|
const geometry = new THREE.SphereGeometry(1, 64, 32);
|
||
|
|
|
||
|
|
const indexTexture = loader.load('resources/data/world/country-index-texture.png', render);
|
||
|
|
indexTexture.minFilter = THREE.NearestFilter;
|
||
|
|
indexTexture.magFilter = THREE.NearestFilter;
|
||
|
|
|
||
|
|
const pickingMaterial = new THREE.MeshBasicMaterial({map: indexTexture});
|
||
|
|
pickingScene.add(new THREE.Mesh(geometry, pickingMaterial));
|
||
|
|
|
||
|
|
const fragmentShaderReplacements = [
|
||
|
|
{
|
||
|
|
from: '#include <common>',
|
||
|
|
to: `
|
||
|
|
#include <common>
|
||
|
|
uniform sampler2D indexTexture;
|
||
|
|
uniform sampler2D paletteTexture;
|
||
|
|
uniform float paletteTextureWidth;
|
||
|
|
`,
|
||
|
|
},
|
||
|
|
{
|
||
|
|
from: '#include <color_fragment>',
|
||
|
|
to: `
|
||
|
|
#include <color_fragment>
|
||
|
|
{
|
||
|
|
vec4 indexColor = texture2D(indexTexture, vUv);
|
||
|
|
float index = indexColor.r * 255.0 + indexColor.g * 255.0 * 256.0;
|
||
|
|
vec2 paletteUV = vec2((index + 0.5) / paletteTextureWidth, 0.5);
|
||
|
|
vec4 paletteColor = texture2D(paletteTexture, paletteUV);
|
||
|
|
// diffuseColor.rgb += paletteColor.rgb; // white outlines
|
||
|
|
diffuseColor.rgb = paletteColor.rgb - diffuseColor.rgb; // black outlines
|
||
|
|
}
|
||
|
|
`,
|
||
|
|
},
|
||
|
|
];
|
||
|
|
|
||
|
|
const texture = loader.load('resources/data/world/country-outlines-4k.png', render);
|
||
|
|
const material = new THREE.MeshBasicMaterial({map: texture});
|
||
|
|
material.onBeforeCompile = function(shader) {
|
||
|
|
fragmentShaderReplacements.forEach((rep) => {
|
||
|
|
shader.fragmentShader = shader.fragmentShader.replace(rep.from, rep.to);
|
||
|
|
});
|
||
|
|
shader.uniforms.paletteTexture = {value: paletteTexture};
|
||
|
|
shader.uniforms.indexTexture = {value: indexTexture};
|
||
|
|
shader.uniforms.paletteTextureWidth = {value: paletteTextureWidth};
|
||
|
|
};
|
||
|
|
scene.add(new THREE.Mesh(geometry, material));
|
||
|
|
}
|
||
|
|
|
||
|
|
async function loadJSON(url) {
|
||
|
|
const req = await fetch(url);
|
||
|
|
return req.json();
|
||
|
|
}
|
||
|
|
|
||
|
|
let numCountriesSelected = 0;
|
||
|
|
let countryInfos;
|
||
|
|
async function loadCountryData() {
|
||
|
|
countryInfos = await loadJSON('resources/data/world/country-info.json'); /* threejs.org: url */
|
||
|
|
|
||
|
|
const lonFudge = Math.PI * 1.5;
|
||
|
|
const latFudge = Math.PI;
|
||
|
|
// 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();
|
||
|
|
// 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);
|
||
|
|
|
||
|
|
const labelParentElem = document.querySelector('#labels');
|
||
|
|
for (const countryInfo of countryInfos) {
|
||
|
|
const {lat, lon, min, max, name} = countryInfo;
|
||
|
|
|
||
|
|
// adjust the helpers to point to the latitude and longitude
|
||
|
|
lonHelper.rotation.y = THREE.MathUtils.degToRad(lon) + lonFudge;
|
||
|
|
latHelper.rotation.x = THREE.MathUtils.degToRad(lat) + latFudge;
|
||
|
|
|
||
|
|
// get the position of the lat/lon
|
||
|
|
positionHelper.updateWorldMatrix(true, false);
|
||
|
|
const position = new THREE.Vector3();
|
||
|
|
positionHelper.getWorldPosition(position);
|
||
|
|
countryInfo.position = position;
|
||
|
|
|
||
|
|
// compute the area for each country
|
||
|
|
const width = max[0] - min[0];
|
||
|
|
const height = max[1] - min[1];
|
||
|
|
const area = width * height;
|
||
|
|
countryInfo.area = area;
|
||
|
|
|
||
|
|
// add an element for each country
|
||
|
|
const elem = document.createElement('div');
|
||
|
|
elem.textContent = name;
|
||
|
|
labelParentElem.appendChild(elem);
|
||
|
|
countryInfo.elem = elem;
|
||
|
|
}
|
||
|
|
requestRenderIfNotRequested();
|
||
|
|
}
|
||
|
|
loadCountryData();
|
||
|
|
|
||
|
|
const tempV = new THREE.Vector3();
|
||
|
|
const cameraToPoint = new THREE.Vector3();
|
||
|
|
const cameraPosition = new THREE.Vector3();
|
||
|
|
const normalMatrix = new THREE.Matrix3();
|
||
|
|
|
||
|
|
const settings = {
|
||
|
|
minArea: 20,
|
||
|
|
maxVisibleDot: -0.2,
|
||
|
|
};
|
||
|
|
|
||
|
|
function updateLabels() {
|
||
|
|
// exit if we have not loaded the data yet
|
||
|
|
if (!countryInfos) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
const large = settings.minArea * settings.minArea;
|
||
|
|
// get a matrix that represents a relative orientation of the camera
|
||
|
|
normalMatrix.getNormalMatrix(camera.matrixWorldInverse);
|
||
|
|
// get the camera's position
|
||
|
|
camera.getWorldPosition(cameraPosition);
|
||
|
|
for (const countryInfo of countryInfos) {
|
||
|
|
const {position, elem, area, selected} = countryInfo;
|
||
|
|
const largeEnough = area >= large;
|
||
|
|
const show = selected || (numCountriesSelected === 0 && largeEnough);
|
||
|
|
if (!show) {
|
||
|
|
elem.style.display = 'none';
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Orient the position based on the camera's orientation.
|
||
|
|
// Since the sphere is at the origin and the sphere is a unit sphere
|
||
|
|
// this gives us a camera relative direction vector for the position.
|
||
|
|
tempV.copy(position);
|
||
|
|
tempV.applyMatrix3(normalMatrix);
|
||
|
|
|
||
|
|
// compute the direction to this position from the camera
|
||
|
|
cameraToPoint.copy(position);
|
||
|
|
cameraToPoint.applyMatrix4(camera.matrixWorldInverse).normalize();
|
||
|
|
|
||
|
|
// get the dot product of camera relative direction to this position
|
||
|
|
// on the globe with the direction from the camera to that point.
|
||
|
|
// -1 = facing directly towards the camera
|
||
|
|
// 0 = exactly on tangent of the sphere from the camera
|
||
|
|
// > 0 = facing away
|
||
|
|
const dot = tempV.dot(cameraToPoint);
|
||
|
|
|
||
|
|
// if the orientation is not facing us hide it.
|
||
|
|
if (dot > settings.maxVisibleDot) {
|
||
|
|
elem.style.display = 'none';
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// restore the element to its default display style
|
||
|
|
elem.style.display = '';
|
||
|
|
|
||
|
|
// get the normalized screen coordinate of that position
|
||
|
|
// x and y will be in the -1 to +1 range with x = -1 being
|
||
|
|
// on the left and y = -1 being on the bottom
|
||
|
|
tempV.copy(position);
|
||
|
|
tempV.project(camera);
|
||
|
|
|
||
|
|
// convert the normalized position to CSS coordinates
|
||
|
|
const x = (tempV.x * .5 + .5) * canvas.clientWidth;
|
||
|
|
const y = (tempV.y * -.5 + .5) * canvas.clientHeight;
|
||
|
|
|
||
|
|
// move the elem to that position
|
||
|
|
elem.style.transform = `translate(-50%, -50%) translate(${x}px,${y}px)`;
|
||
|
|
|
||
|
|
// set the zIndex for sorting
|
||
|
|
elem.style.zIndex = (-tempV.z * .5 + .5) * 100000 | 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
class GPUPickHelper {
|
||
|
|
constructor() {
|
||
|
|
// create a 1x1 pixel render target
|
||
|
|
this.pickingTexture = new THREE.WebGLRenderTarget(1, 1);
|
||
|
|
this.pixelBuffer = new Uint8Array(4);
|
||
|
|
}
|
||
|
|
pick(cssPosition, scene, camera) {
|
||
|
|
const {pickingTexture, pixelBuffer} = this;
|
||
|
|
|
||
|
|
// set the view offset to represent just a single pixel under the mouse
|
||
|
|
const pixelRatio = renderer.getPixelRatio();
|
||
|
|
camera.setViewOffset(
|
||
|
|
renderer.getContext().drawingBufferWidth, // full width
|
||
|
|
renderer.getContext().drawingBufferHeight, // full top
|
||
|
|
cssPosition.x * pixelRatio | 0, // rect x
|
||
|
|
cssPosition.y * pixelRatio | 0, // rect y
|
||
|
|
1, // rect width
|
||
|
|
1, // rect height
|
||
|
|
);
|
||
|
|
// render the scene
|
||
|
|
renderer.setRenderTarget(pickingTexture);
|
||
|
|
renderer.render(scene, camera);
|
||
|
|
renderer.setRenderTarget(null);
|
||
|
|
// clear the view offset so rendering returns to normal
|
||
|
|
camera.clearViewOffset();
|
||
|
|
//read the pixel
|
||
|
|
renderer.readRenderTargetPixels(
|
||
|
|
pickingTexture,
|
||
|
|
0, // x
|
||
|
|
0, // y
|
||
|
|
1, // width
|
||
|
|
1, // height
|
||
|
|
pixelBuffer);
|
||
|
|
|
||
|
|
const id =
|
||
|
|
(pixelBuffer[0] << 0) |
|
||
|
|
(pixelBuffer[1] << 8) |
|
||
|
|
(pixelBuffer[2] << 16);
|
||
|
|
|
||
|
|
return id;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
const pickHelper = new GPUPickHelper();
|
||
|
|
|
||
|
|
function getCanvasRelativePosition(event) {
|
||
|
|
const rect = canvas.getBoundingClientRect();
|
||
|
|
return {
|
||
|
|
x: (event.clientX - rect.left) * canvas.width / rect.width,
|
||
|
|
y: (event.clientY - rect.top ) * canvas.height / rect.height,
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
function pickCountry(event) {
|
||
|
|
// exit if we have not loaded the data yet
|
||
|
|
if (!countryInfos) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
const position = getCanvasRelativePosition(event);
|
||
|
|
const id = pickHelper.pick(position, pickingScene, camera);
|
||
|
|
if (id > 0) {
|
||
|
|
const countryInfo = countryInfos[id - 1];
|
||
|
|
const selected = !countryInfo.selected;
|
||
|
|
if (selected && !event.shiftKey && !event.ctrlKey && !event.metaKey) {
|
||
|
|
unselectAllCountries();
|
||
|
|
}
|
||
|
|
numCountriesSelected += selected ? 1 : -1;
|
||
|
|
countryInfo.selected = selected;
|
||
|
|
} else if (numCountriesSelected) {
|
||
|
|
unselectAllCountries();
|
||
|
|
}
|
||
|
|
requestRenderIfNotRequested();
|
||
|
|
}
|
||
|
|
|
||
|
|
function unselectAllCountries() {
|
||
|
|
numCountriesSelected = 0;
|
||
|
|
countryInfos.forEach((countryInfo) => {
|
||
|
|
countryInfo.selected = false;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
canvas.addEventListener('pointerup', pickCountry);
|
||
|
|
|
||
|
|
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();
|
||
|
|
|
||
|
|
updateLabels();
|
||
|
|
|
||
|
|
renderer.render(scene, camera);
|
||
|
|
}
|
||
|
|
render();
|
||
|
|
|
||
|
|
function requestRenderIfNotRequested() {
|
||
|
|
if (!renderRequested) {
|
||
|
|
renderRequested = true;
|
||
|
|
requestAnimationFrame(render);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
controls.addEventListener('change', requestRenderIfNotRequested);
|
||
|
|
window.addEventListener('resize', requestRenderIfNotRequested);
|
||
|
|
}
|
||
|
|
|
||
|
|
main();
|
||
|
|
</script>
|
||
|
|
</html>
|