import {
  Color,
  DirectionalLight,
  AmbientLight,
  Vector3,
  GridHelper,
  MathUtils,
} 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();

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({
  target: "view",
  crs: "EPSG:2154",
  backgroundColor: 0xcccccc,
});

// Add a sunlight
const sun = new DirectionalLight("#ffffff", 1.4);
sun.position.set(1, 0, 1).normalize();
sun.updateMatrixWorld(true);
instance.scene.add(sun);

// We can look below the floor, so let's light also a bit there
const sun2 = new DirectionalLight("#ffffff", 0.5);
sun2.position.set(0, -1, 1);
sun2.updateMatrixWorld();
instance.scene.add(sun2);

// Add ambient light
const ambientLight = new AmbientLight(0xffffff, 1);
instance.scene.add(ambientLight);
instance.view.minNearPlane = 0.5;

const ifc = new Tiles3D(
  new Tiles3DSource(
    "https://3d.oslandia.com/3dtiles/19_rue_Marc_Antoine_Petit_ifc/tileset.json",
  ),
);

// Hide some elements that don't bring visual value
ifc.addEventListener("object-created", (evt) => {
  const obj = evt.obj;
  if (obj.userData?.class === "IfcSpace") {
    obj.visible = false;
    instance.notifyChange();
  }
});

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

  instance.view.setControls(controls);

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

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

  const ratio = bbox.getSize(tmpVec3).x / bbox.getSize(tmpVec3).z;

  const position = bbox
    .getCenter(new Vector3())
    .clone()
    .add(bbox.getSize(tmpVec3).multiply(new Vector3(-2, -2, ratio)));

  const lookAt = bbox.getCenter(tmpVec3);
  lookAt.z = bbox.min.z;

  placeCamera(position, lookAt);

  const grid = new GridHelper(60, 10);
  grid.rotateX(MathUtils.degToRad(90));

  grid.position.copy(lookAt);

  instance.add(grid);
  grid.updateMatrixWorld(true);
}

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

Inspector.attach("inspector", instance);

const resultsTable = document.getElementById("results-body");

let highlighted;
let highlightColor = new Color(0xff7171);

let canPick = true;

function highlight(evt) {
  if (!canPick) {
    return;
  }

  const picked = instance.pickObjectsAt(evt, {
    radius: 5,
    limit: 10,
    where: [ifc],
    filter: (pick) => pick.object.visible, // Ignore invisible objects, such as IfcSpace elements
  });

  if (highlighted) {
    // reset style
    const material = highlighted.material;
    material.color.copy(material.userData.oldColor);

    instance.notifyChange(highlighted);
  }

  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 obj = picked[0].object;

    const material = obj.material;

    // keep the old color to reset it later
    if (!material.userData.oldColor) {
      material.userData.oldColor = material.color.clone();
    }

    material.color.copy(highlightColor);

    instance.notifyChange(obj);

    highlighted = obj;

    const rows = [];

    for (const [name, value] of Object.entries(obj.userData)) {
      if (name !== "oldColor" && name !== "parentEntity") {
        const row = document.createElement("tr");
        const nameCell = document.createElement("td");
        nameCell.innerHTML = `<code>${name}</code>`;
        const valueCell = document.createElement("td");
        valueCell.innerText = value;
        row.append(nameCell, valueCell);
        rows.push(row);
      }
    }

    resultsTable.replaceChildren(...rows);
  }
}

// Prevent picking if user is dragging mouse
instance.domElement.addEventListener("mousedown", () => (canPick = true));
instance.domElement.addEventListener("mousemove", () => (canPick = false));
instance.domElement.addEventListener("mouseup", highlight);

<!doctype html>
<html lang="en">
  <head>
    <title>3D Tiles Building</title>
    <meta charset="UTF-8" />
    <meta name="name" content="3dtiles_building" />
    <meta
      name="description"
      content="Display a 3D Tiles building converted from a IFC file with py3dtiles."
    />
    <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/examples/css/example.css"
    />
  </head>

  <body>
    <div id="view" class="m-0 p-0 w-100 h-100"></div>
    <div
      id="inspector"
      class="position-absolute top-0 start-0 mh-100 overflow-auto"
    ></div>

    <div class="side-pane-with-status-bar">
      <div class="card">
        <h5 class="card-header">Element informations</h5>
        <div class="card-body" style="max-width: 30vw">
          <!-- Result table -->
          <table class="table table-sm table-striped">
            <thead>
              <tr>
                <!-- <th scope="col">#</th> -->
                <th scope="col">Name</th>
                <th scope="col">Value</th>
              </tr>
            </thead>
            <tbody id="results-body">
              <tr>
                <th scope="row" colspan="4">
                  Click on the scene to inspect object properties
                </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>

{
    "name": "3dtiles_building",
    "dependencies": {
        "@giro3d/giro3d": "git+https://gitlab.com/giro3d/giro3d.git"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}