Add a 3D model with Shadow

Use a custom style layer with three.js to add a 3D model to the map. See the example: https://docs.mapbox.com//mapbox-gl-js/example/add-3d-model/

by jscastro76

HTML

<script src="https://unpkg.com/[email protected]/build/three.min.js"></script>
<script src="https://unpkg.com/[email protected]/examples/js/loaders/GLTFLoader.js"></script>
<script src="https://api.mapbox.com/mapbox-gl-js/v2.0.1/mapbox-gl.js"></script>
<link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/v2.0.1/mapbox-gl.css">


<div id="map"></div>

CSS

body { margin: 0; padding: 0; }
	#map { position: absolute; top: 0; bottom: 0; width: 100%; }

JavaScript

mapboxgl.accessToken = 'pk.eyJ1IjoianNjYXN0cm8iLCJhIjoiY2s2YzB6Z25kMDVhejNrbXNpcmtjNGtpbiJ9.28ynPf1Y5Q8EyB_moOHylw';
var map = (window.map = new mapboxgl.Map({
  container: 'map',
  style: 'mapbox://styles/mapbox/light-v10',
  zoom: 18,
  center: [148.9819, -35.3981],
  pitch: 60,
  bearing: 45,
  antialias: true // create the gl context with MSAA antialiasing, so custom layers are antialiased
}));

// parameters to ensure the model is georeferenced correctly on the map
var modelOrigin = [148.9819, -35.39847];
var modelAltitude = 0.01;
var modelRotate = [Math.PI / 2, 0, 0];

var modelAsMercatorCoordinate = mapboxgl.MercatorCoordinate.fromLngLat(
  modelOrigin,
  modelAltitude
);

// transformation parameters to position, rotate and scale the 3D model onto the map
var modelTransform = {
  translateX: modelAsMercatorCoordinate.x,
  translateY: modelAsMercatorCoordinate.y,
  translateZ: modelAsMercatorCoordinate.z,
  rotateX: modelRotate[0],
  rotateY: modelRotate[1],
  rotateZ: modelRotate[2],
  /* Since our 3D model is in real world meters, a scale transform needs to be
   * applied since the CustomLayerInterface expects units in MercatorCoordinates.
   */
  scale: modelAsMercatorCoordinate.meterInMercatorCoordinateUnits()
};

var THREE = window.THREE;

// configuration of the custom layer for a 3D model per the CustomLayerInterface
var customLayer = {
  id: '3d-model',
  type: 'custom',
  renderingMode: '3d',
  onAdd: function(map, gl) {
    this.camera = new THREE.Camera();
    this.scene = new THREE.Scene();

    const dirLight = new THREE.DirectionalLight(0xffffff, 1);
    dirLight.position.set(0, 70, 100);
    let d = 100;
    let r = 2;
    let mapSize = 1024;
    dirLight.castShadow = true;
    dirLight.shadow.radius = r;
    dirLight.shadow.mapSize.width = mapSize;
    dirLight.shadow.mapSize.height = mapSize;
    dirLight.shadow.camera.top = dirLight.shadow.camera.right = d;
    dirLight.shadow.camera.bottom = dirLight.shadow.camera.left = -d;
   ...