itowns
Version:
A JS/WebGL framework for 3D geospatial data visualization
151 lines (125 loc) • 5.86 kB
HTML
<html>
<head>
<title>Point Cloud Viewer</title>
<script type="importmap">
{
"imports": {
"itowns": "../dist/itowns.js",
"debug": "../dist/debug.js",
"LoadingScreen": "./jsm/GUI/LoadingScreen.js",
"itowns_widgets": "../dist/itowns_widgets.js",
"three": "https://unpkg.com/three@0.170.0/build/three.module.js",
"three/addons/": "https://unpkg.com/three@0.170.0/examples/jsm/",
"lil": "https://unpkg.com/lil-gui@0.19.2/dist/lil-gui.esm.min.js"
}
}
</script>
<style type="text/css">
#info {
color: #7ad7ff;
font-family: 'Open Sans', sans-serif;
position: absolute;
top: 0;
left: 0;
padding: 0.3rem;
background-color: #404040;
z-index: 1;
}
@media (max-width: 600px) {
#info,
.dg {
display: none;
}
}
</style>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="css/example.css">
<link rel="stylesheet" type="text/css" href="css/LoadingScreen.css">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div id="viewerDiv">
<div id="info"></div>
</div>
<div>
<script type="module">
import lil from 'lil';
import setupLoadingScreen from 'LoadingScreen';
import * as THREE from 'three';
import * as itowns from 'itowns';
import * as debug from 'debug';
import * as itowns_widgets from 'itowns_widgets';
var potreeLayer;
var oldPostUpdate;
var viewerDiv;
var debugGui;
var view;
var controls;
// Define crs projection that we will use (taken from https://epsg.io/3946, Proj4js section)
itowns.CRS.defs('EPSG:3946', '+proj=lcc +lat_1=45.25 +lat_2=46.75 +lat_0=46 +lon_0=3 +x_0=1700000 +y_0=5200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs');
viewerDiv = document.getElementById('viewerDiv');
viewerDiv.style.display = 'block';
debugGui = new lil();
// TODO: do we really need to disable logarithmicDepthBuffer ?
view = new itowns.View('EPSG:3946', viewerDiv);
setupLoadingScreen(viewerDiv, view);
view.mainLoop.gfxEngine.renderer.setClearColor(0xcccccc);
// Configure Point Cloud layer
potreeLayer = new itowns.PotreeLayer('eglise_saint_blaise_arles', {
source: new itowns.PotreeSource({
file: 'eglise_saint_blaise_arles.js',
url: 'https://raw.githubusercontent.com/iTowns/iTowns2-sample-data/master/pointclouds/eglise_saint_blaise_arles',
crs: view.referenceCrs,
}),
});
// point selection on double-click
function dblClickHandler(event) {
var pick = view.pickObjectsAt(event, 5, potreeLayer);
for (const p of pick) {
console.info('Selected point #' + p.index + ' in position (' +
p.object.position.x + ', ' +
p.object.position.y + ', ' +
p.object.position.z +
') in Points ' + p.object.layer.id);
}
}
view.domElement.addEventListener('dblclick', dblClickHandler);
function placeCamera(position, lookAt) {
view.camera3D.position.copy(position);
view.camera3D.lookAt(lookAt);
// create controls
controls = new itowns.FirstPersonControls(view, { focusOnClick: true });
debugGui.add(controls.options, 'moveSpeed', 1, 100).name('Movement speed');
view.notifyChange(view.camera3D);
}
// add potreeLayer to scene
function onLayerReady() {
var ratio;
var position;
var lookAt = new THREE.Vector3();
var size = new THREE.Vector3();
potreeLayer.root.bbox.getSize(size);
potreeLayer.root.bbox.getCenter(lookAt);
debug.PointCloudDebug.initTools(view, potreeLayer, debugGui);
view.camera3D.far = 2.0 * size.length();
ratio = size.x / size.z;
position = potreeLayer.root.bbox.min.clone().add(
size.multiply({ x: 0, y: 0, z: ratio * 0.5 }));
lookAt.z = potreeLayer.root.bbox.min.z;
placeCamera(position, lookAt);
controls.moveSpeed = size.length() / 3;
// update stats window
var info = document.getElementById('info');
view.addFrameRequester(itowns.MAIN_LOOP_EVENTS.AFTER_RENDER, () => {
info.textContent = potreeLayer.displayedCount.toLocaleString() + ' points';
});
}
window.view = view;
view.addLayer(potreeLayer).then(onLayerReady);
window.view = view;
window.itowns = itowns;
window.THREE = THREE;
</script>
</body>
</html>