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index.html
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<!DOCTYPE html>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<title>3D Earth with Mapbox GL, D3.js and Three.js</title>
<style>
html, body { margin: 0; padding: 0; overflow: hidden; }
html { background-color: #000; color: #fff; font-family: sans-serif; }
select { font: inherit; }
canvas { image-rendering: crisp-edges; image-rendering: pixelated; }
#map, #equirectangular-map { position: absolute; pointer-events: none; right: 0; opacity: 0; }
.DEBUG #map, .DEBUG #equirectangular-map { opacity: 1; }
#map { bottom: 0; transform: scale(.1); transform-origin: bottom right; }
#equirectangular-map { transform: scale(.1); transform-origin: top right; }
#options { position: absolute; top: 10px; right: 10px; z-index: 99999; text-align: right; }
#options[hidden] { display: block; opacity: .5; pointer-events: none; }
#options select, #options label { padding: .5em; display: inline-block; vertical-align: middle; }
#container canvas { vertical-align: top; }
#container > div { bottom: 0; top: auto !important; }
footer { position: absolute; bottom: 10px; right: 10px; opacity: .75; }
footer a { color: inherit; }
#loader { position: absolute; left: 10px; top: 10px; animation: fade .5s infinite ease-in-out alternate; }
@keyframes fade {
0% { opacity: .3 }
100% { opacity: 1 }
}
.fullscreen #options, .fullscreen footer { display: none; }
</style>
<div id="map"></div>
<canvas id="equirectangular-map"></canvas>
<div id="container"></div>
<div id="loader">Loading…</div>
<div id="options">
<select id="style-selector" onChange="generateMap(this.value)">
<option value="satellite" selected>Satellite</option>
<option value="streets">Streets</option>
<option value="dark">Dark</option>
<option value="light">Light</option>
</select>
<br>
<label><input type="checkbox" id="cloud-checkbox" onChange="toggleClouds(this.checked)"> Clouds</label>
</div>
<footer>
<a href="https://github.com/cheeaun/3d-earth" target="_blank">Learn more on GitHub</a>
</footer>
<script src="https://api.mapbox.com/mapbox-gl-js/v0.39.1/mapbox-gl.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-geo/1.6.4/d3-geo.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/87/three.min.js"></script>
<script src="https://unpkg.com/[email protected]/dist/camera-controls.min.js"></script>
<script src="https://rawgit.com/mrdoob/stats.js/master/build/stats.min.js"></script>
<script>
mapboxgl.accessToken = 'pk.eyJ1IjoiY2hlZWF1biIsImEiOiJjanBlczR2Y2EwMzh3M3FydjRiNmZxa21sIn0.V4CsQyUdAXQhIkWM4vfADA';
var zoom = 1;
var mapWidth = 1200 * zoom;
var mapHeight = 1200 * zoom;
var DEBUG = location.hash == '#DEBUG';
var $map = document.getElementById('map');
var $eMap = document.getElementById('equirectangular-map');
var $loader = document.getElementById('loader');
var $options = document.getElementById('options');
$map.style.width = mapWidth + 'px';
$map.style.height = mapHeight + 'px';
var dpr = window.devicePixelRatio;
var width = mapWidth * dpr;
var height = mapHeight * dpr;
var halfHeight = height / 2;
$eMap.width = width;
$eMap.height = halfHeight;
// 3D stuff
var container = document.getElementById('container');
var renderer = new THREE.WebGLRenderer({
alpha: true,
antialias: true,
stencil: false,
});
renderer.setPixelRatio(dpr);
renderer.setSize(window.innerWidth, window.innerHeight);
// Fix "GL_ARB_gpu_shader5" bug: https://github.com/mrdoob/three.js/issues/9716
renderer.context.getShaderInfoLog = function(){ return '' };
container.appendChild(renderer.domElement);
// Camera
var camera = new THREE.PerspectiveCamera(80, window.innerWidth / window.innerHeight, 1, 2000);
camera.position.z = 500;
var CameraControls = cameraControlsFactory(THREE);
var cameraControls = new CameraControls(camera, renderer.domElement);
cameraControls.rotate(0, -1, true); // Tilt down to show North pole a bit
cameraControls.update();
// Hack cameraControls to have min & max distance
var _dolly = cameraControls.dolly;
cameraControls.dolly = function(distance, enableTransition){
var d = Math.abs(distance);
if (d < 18 || d > 60) return;
_dolly.call(cameraControls, distance, enableTransition);
}
// Scene
var scene = new THREE.Scene();
scene.background = new THREE.Color(0x000000);
// Earth
var texture = new THREE.CanvasTexture($eMap);
texture.minFilter = THREE.LinearFilter; // Fix "Textures should be of a power of two" warning
var geometry = new THREE.SphereGeometry(200, 50, 50);
var material = new THREE.MeshPhongMaterial({
overdraw: .5, // fill in the gaps between triangles
});
var earth = new THREE.Mesh(geometry, material);
scene.add(earth);
// Clouds
var cloudMaterial = new THREE.MeshLambertMaterial({
opacity: 0.8,
transparent: true,
});
var cloud = new THREE.Mesh(geometry, cloudMaterial);
cloud.visible = false;
(new THREE.TextureLoader()).load('clouds_2048.jpg', function(texture){
cloudMaterial.alphaMap = texture;
});
earth.add(cloud);
function toggleClouds(checked){
cloud.visible = checked;
};
// Stars
var starsGeometry = new THREE.SphereGeometry(1000);
var starsMaterial = new THREE.MeshBasicMaterial({
side: THREE.BackSide,
});
var stars = new THREE.Mesh(starsGeometry, starsMaterial);
scene.add(stars);
(new THREE.TextureLoader()).load('galaxystarfield.png', function(texture){
starsMaterial.map = texture;
});
// Light
var light = new THREE.DirectionalLight(0xffffff);
light.target = earth;
scene.add(light);
// Stats: https://github.com/mrdoob/stats.js
if (DEBUG){
var stats = new Stats();
container.appendChild(stats.domElement);
}
// Stop auto-rotating earth when dragging it
var stopRotating = false;
container.ontouchstart = container.onmousedown = function(){
stopRotating = true;
}
container.ontouchend = container.ontouchcancel = container.onmouseup = function(){
stopRotating = false;
}
window.onresize = function(){
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
const clock = new THREE.Clock();
function render(){
var delta = clock.getDelta();
cameraControls.update(delta);
if (!stopRotating){
var y = .001;
earth.rotation.y += y;
stars.rotation.y -= y/2;
}
light.position.copy(camera.position);
renderer.render(scene, camera);
}
function animate(){
requestAnimationFrame(animate);
render();
if (DEBUG) stats.update();
}
// Projections stuff
var equirectangular = d3.geoEquirectangular()
.scale(width / 2 / Math.PI)
.translate([width / 2, height * .75]);
var mercator = d3.geoMercator()
.scale(width / 2 / Math.PI)
.translate([width / 2, height / 2]);
var invert = equirectangular.invert;
var context = $eMap.getContext('2d', { alpha: false });
function generateMap(style){
console.log('Generate map: ' + style);
$options.hidden = true;
$loader.hidden = false;
var map = new mapboxgl.Map({
container: 'map',
// optimize=true -> https://blog.mapbox.com/style-optimized-vector-tiles-39868da81275
style: 'mapbox://styles/mapbox/' + style + '-v9?optimize=true',
center: [0, 0],
zoom: zoom,
interactive: false,
renderWorldCopies: false,
attributionControl: false,
trackResize: false,
preserveDrawingBuffer: true,
});
map.on('load', function(){
var canvas = map.getCanvas();
var gl = canvas.getContext('webgl', { alpha: false, antialias: false });
console.log('Map loaded');
setTimeout(function(){
console.log('Render map start');
var source = new Uint8Array(gl.drawingBufferWidth * gl.drawingBufferHeight * 4);
gl.readPixels(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight, gl.RGBA, gl.UNSIGNED_BYTE, source);
var sourceData = new Uint8ClampedArray(source.buffer);
var targetData = new Uint8ClampedArray(sourceData.length/2).fill(255);
// This part is really slow >:(
console.time('Reprojection');
var w = width;
var h = height;
var x = 0;
var y;
for (; x < w; x++){
for (y = 0; y < h; y++){
var pixels = mercator(invert([x, y]));
if (!isNaN(pixels[1])){
var sourceIndex = 4 * (~~pixels[0] + w * ~~pixels[1]);
// Would have been x + w + h if it's not WebGL context
// (h-y-1) is to flip the Y (vertical) because WebGL texture starts at the bottom
var targetIndex = 4 * (x + w * (h-y-1));
targetData[targetIndex] = sourceData[sourceIndex];
targetData[targetIndex + 1] = sourceData[sourceIndex + 1];
targetData[targetIndex + 2] = sourceData[sourceIndex + 2];
// targetData[targetIndex + 3] = 255; // Already filled
}
}
}
console.timeEnd('Reprojection');
// $eMap.width = $eMap.width;
var target = context.createImageData(width, halfHeight);
target.data.set(targetData);
// Draw the equirectangular projection canvas
context.clearRect(0, 0, $eMap.width, $eMap.height);
context.putImageData(target, 0, 0);
// Cover the North pole
for (var y=0; y<halfHeight; y++){
var index = y * w * 4;
var firstColor = targetData[index];
if (firstColor !== 0){
var color = 'rgb(' + targetData[index] + ',' + targetData[index+1] + ',' + targetData[index+2] + ')';
context.fillStyle = color;
context.fillRect(0, 0, w, y);
break;
}
}
// Cover the South pole
for (var y=halfHeight-1; y>=0; --y){
var index = y * w * 4;
var firstColor = targetData[index];
if (firstColor !== 0){
var color = 'rgb(' + targetData[index] + ',' + targetData[index+1] + ',' + targetData[index+2] + ')';
context.fillStyle = color;
context.fillRect(0, y+1, w, halfHeight-y);
break;
}
}
console.log('Render map end');
$options.hidden = false;
$loader.hidden = true;
// Set texture on first load
if (!material.map){
material.map = texture;
material.needsUpdate = true;
animate();
}
// Update texture
texture.needsUpdate = true;
map.remove();
}, 350); // Delay for the tiles to render properly
});
};
generateMap('satellite');
$options.ondblclick = $options.ongestureend = function(){
document.body.classList.toggle('fullscreen');
}
// Debugging
if (DEBUG){
document.body.className = 'DEBUG';
}
</script>