Display a point cloud from the Lidar HD project. Colorized with a WMS layer.
Giro3D is capable of displaying large point clouds. Lidar data can be converted into 3D Tiles using py3dtiles
import TileWMS from 'ol/source/TileWMS.js';
import { Vector3, CubeTextureLoader } from 'three';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';
import Instance from '@giro3d/giro3d/core/Instance.js';
import ColorLayer from '@giro3d/giro3d/core/layer/ColorLayer.js';
import Tiles3D from '@giro3d/giro3d/entities/Tiles3D.js';
import Tiles3DSource from '@giro3d/giro3d/sources/Tiles3DSource.js';
import TiledImageSource from '@giro3d/giro3d/sources/TiledImageSource.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';
import Extent from '@giro3d/giro3d/core/geographic/Extent.js';
// Defines projection that we will use (taken from https://epsg.io/2154, Proj4js section)
Instance.registerCRS(
'EPSG:2154',
'+proj=lcc +lat_0=46.5 +lon_0=3 +lat_1=49 +lat_2=44 +x_0=700000 +y_0=6600000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs',
);
const tmpVec3 = new Vector3();
const viewerDiv = document.getElementById('viewerDiv');
const instance = new Instance(viewerDiv, { crs: 'EPSG:2154' });
// Creates controls
const controls = new MapControls(instance.camera.camera3D, instance.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.2;
instance.useTHREEControls(controls);
// Adds a WMS imagery layer
const wmsOthophotoSource = new TiledImageSource({
source: new TileWMS({
url: 'https://data.geopf.fr/wms-r',
projection: 'EPSG:2154',
crossOrigin: 'anonymous',
params: {
LAYERS: ['HR.ORTHOIMAGERY.ORTHOPHOTOS'],
FORMAT: 'image/jpeg',
},
}),
});
const pointcloud = new Tiles3D(
'pointcloud',
new Tiles3DSource('https://3d.oslandia.com/lidar_hd/tileset.json'),
);
// add pointcloud to scene
function initializeCameraPosition(layer) {
const bbox = layer.root.bbox
? layer.root.bbox
: layer.root.boundingVolume.box.clone().applyMatrix4(layer.root.matrixWorld);
// configure camera
instance.camera.camera3D.far = 2.0 * bbox.getSize(tmpVec3).length();
const ratio = bbox.getSize(tmpVec3).x / bbox.getSize(tmpVec3).z;
const position = bbox.min
.clone()
.add(bbox.getSize(tmpVec3).multiply({ x: 0, y: 0, z: ratio * 0.5 }));
const lookAt = bbox.getCenter(tmpVec3);
lookAt.z = bbox.min.z;
instance.camera.camera3D.position.set(position.x, position.y, position.z);
instance.camera.camera3D.lookAt(lookAt);
controls.target.copy(lookAt);
controls.saveState();
const colorLayer = new ColorLayer({
name: 'orthophoto-ign',
// The extent is useful to restrict the processing of the image layer
// (which is much bigger than our point cloud).
extent: Extent.fromBox3('EPSG:2154', bbox),
source: wmsOthophotoSource,
});
pointcloud.attach(colorLayer);
instance.renderingOptions.enableEDL = true;
instance.renderingOptions.enableInpainting = true;
instance.renderingOptions.enablePointCloudOcclusion = true;
// refresh scene
instance.notifyChange(instance.camera.camera3D);
}
instance.add(pointcloud).then(initializeCameraPosition);
// add a skybox background
const cubeTextureLoader = new CubeTextureLoader();
cubeTextureLoader.setPath('image/skyboxsun25deg_zup/');
const cubeTexture = cubeTextureLoader.load([
'px.jpg',
'nx.jpg',
'py.jpg',
'ny.jpg',
'pz.jpg',
'nz.jpg',
]);
instance.scene.background = cubeTexture;
Inspector.attach(document.getElementById('panelDiv'), instance);
// Bind events
<!doctype html>
<html lang="en">
<head>
<title>Pointcloud from IGN Lidar HD</title>
<meta charset="UTF-8" />
<meta name="name" content="lidar_hd" />
<meta name="description" content="Display a point cloud from the Lidar HD project. Colorized with a WMS layer." />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="icon" href="https://giro3d.org/images/favicon.svg" />
<link href="https://giro3d.org/assets/bootstrap-custom.css" rel="stylesheet" />
<script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
<link
rel="stylesheet"
type="text/css"
href="https://giro3d.org/next/css/example.css"
/>
</head>
<body>
<div id="viewerDiv" class="m-0 p-0 w-100 h-100"></div>
<div id="panelDiv" class="position-absolute top-0 start-0 mh-100 overflow-auto"></div>
<script type="module" src="index.js"></script>
<script>
/* activate popovers */
const popoverTriggerList = [].slice.call(
document.querySelectorAll('[data-bs-toggle="popover"]'),
);
popoverTriggerList.map(
// bootstrap is used as script in the template, disable warning about undef
// eslint-disable-next-line no-undef
popoverTriggerEl =>
new bootstrap.Popover(popoverTriggerEl, {
trigger: 'hover',
placement: 'left',
content: document.getElementById(
popoverTriggerEl.getAttribute('data-bs-content'),
).innerHTML,
html: true,
}),
);
</script>
</body>
</html>
{
"name": "lidar_hd",
"dependencies": {
"@giro3d/giro3d": "git+https://gitlab.com/giro3d/giro3d.git"
},
"devDependencies": {
"vite": "^3.2.3"
},
"scripts": {
"start": "vite",
"build": "vite build"
}
}