Display a 3D Tiles point cloud.

# Coordinate Distance to camera
Double-click on the scene for picking
100%
index.js
import { Vector3 } from 'three';
import { MapControls } from 'three/examples/jsm/controls/MapControls.js';

import Instance from '@giro3d/giro3d/core/Instance.js';
import Tiles3D from '@giro3d/giro3d/entities/Tiles3D.js';
import Tiles3DSource from '@giro3d/giro3d/sources/Tiles3DSource.js';
import Inspector from '@giro3d/giro3d/gui/Inspector.js';

const tmpVec3 = new Vector3();

const viewerDiv = document.getElementById('viewerDiv');

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 instance = new Instance(viewerDiv, {
    crs: 'EPSG:2154',
    renderer: {
        clearColor: 0xcccccc,
    },
});

// Configure Point Cloud
const pointcloud = new Tiles3D(
    'pointcloud',
    new Tiles3DSource('https://3d.oslandia.com/3dtiles/eglise_saint_blaise_arles/tileset.json'),
);

function placeCamera(position, lookAt) {
    instance.camera.camera3D.position.set(position.x, position.y, position.z);
    instance.camera.camera3D.lookAt(lookAt);
    // create controls
    const controls = new MapControls(instance.camera.camera3D, instance.domElement);
    controls.target.copy(lookAt);
    controls.enableDamping = true;
    controls.dampingFactor = 0.25;

    instance.useTHREEControls(controls);

    instance.notifyChange(instance.camera.camera3D);
}

// add pointcloud to scene
function initializeCamera() {
    const bbox = pointcloud.root.bbox
        ? pointcloud.root.bbox
        : pointcloud.root.boundingVolume.box.clone().applyMatrix4(pointcloud.root.matrixWorld);

    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;
    placeCamera(position, lookAt);

}

instance.add(pointcloud).then(initializeCamera);

Inspector.attach(document.getElementById('panelDiv'), instance);

const resultsTable = document.getElementById('results-body');
const formatter = new Intl.NumberFormat();

function format(point) {
    return `x: ${formatter.format(point.x)}\n
            y: ${formatter.format(point.y)}\n
            z: ${formatter.format(point.z)}`;
}

instance.domElement.addEventListener('dblclick', e => {
    const picked = instance.pickObjectsAt(e, { radius: 5, limit: 10, where: ['pointcloud'] });

    if (picked.length === 0) {
        const row = document.createElement('tr');
        const count = document.createElement('th');
        count.setAttribute('scope', 'row');
        count.innerText = '-';
        const coordinates = document.createElement('td');
        coordinates.innerText = '-';
        const distanceToCamera = document.createElement('td');
        distanceToCamera.innerText = '-';
        row.append(count, coordinates, distanceToCamera);
        resultsTable.replaceChildren(row);
    } else {
        const rows = picked.map((p, i) => {
            const row = document.createElement('tr');
            const count = document.createElement('th');
            count.setAttribute('scope', 'row');
            count.innerText = `${i + 1}`;
            const coordinates = document.createElement('td');
            coordinates.innerHTML = format(p.point);
            const distanceToCamera = document.createElement('td');
            distanceToCamera.innerText = formatter.format(p.distance);
            row.append(count, coordinates, distanceToCamera);
            return row;
        });
        resultsTable.replaceChildren(...rows);
    }
});
index.html
<!doctype html>
<html lang="en">
    <head>
        <title>3D Tiles Point Cloud</title>
        <meta charset="UTF-8" />
        <meta name="name" content="pointcloud" />
        <meta name="description" content="Display a 3D Tiles point cloud." />
        <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/latest/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>

        <div class="side-pane-with-status-bar">
            <div class="card">
                <div class="card-body" style="max-width: 30vw; overflow: auto">
                    <!-- Result table -->
                    <table class="table small">
                        <thead>
                            <tr>
                                <th scope="col">#</th>
                                <th scope="col">Coordinate</th>
                                <th scope="col">Distance to camera</th>
                            </tr>
                        </thead>
                        <tbody id="results-body">
                            <tr>
                                <th scope="row" colspan="4">Double-click on the scene for picking</th>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </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>
package.json
{
    "name": "pointcloud",
    "dependencies": {
        "@giro3d/giro3d": "0.37.2"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}