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terrain-3d-object.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>3D Terrain with 3D Object</title>
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<script src="../../dist/maplibre-gl-dev.js"></script>
<link rel="stylesheet" href="../../dist/maplibre-gl.css" />
<style>
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
</style>
</head>
<body>
<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>
<div id="map"></div>
<script>
var map = (window.map = new maplibregl.Map({
container: 'map',
zoom: 18,
center: [11.39085, 47.27574],
pitch: 52,
hash: true,
style: {
version: 8,
sources: {
osm: {
type: 'raster',
tiles: ['https://a.tile.openstreetmap.org/{z}/{x}/{y}.png'],
tileSize: 256,
attribution: '© OpenStreetMap Contributors',
maxzoom: 19,
},
terrainSource: {
type: 'raster-dem',
url: 'https://demotiles.maplibre.org/terrain-tiles/tiles.json',
tileSize: 256,
},
hillshadeSource: {
type: 'raster-dem',
url: 'https://demotiles.maplibre.org/terrain-tiles/tiles.json',
tileSize: 256,
},
},
layers: [
{
id: 'osm',
type: 'raster',
source: 'osm',
},
{
id: 'hills',
type: 'hillshade',
source: 'hillshadeSource',
layout: {visibility: 'visible'},
paint: {'hillshade-shadow-color': '#473B24'},
},
],
terrain: {
source: 'terrainSource',
exaggeration: 1,
},
},
maxZoom: 18,
maxPitch: 85,
antialias: true,
}));
map.addControl(
new maplibregl.NavigationControl({
visualizePitch: true,
showZoom: true,
showCompass: true,
})
);
map.addControl(
new maplibregl.TerrainControl({
source: 'terrainSource',
exaggeration: 1,
})
);
// parameters to ensure the model is georeferenced correctly on the map
var modelOrigin = [11.39085, 47.27574];
var modelAltitude = 0;
var modelRotate = [Math.PI / 2, 0, 0];
var modelAsMercatorCoordinate = maplibregl.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 (map, gl) {
this.camera = new THREE.Camera();
this.scene = new THREE.Scene();
// create two three.js lights to illuminate the model
var directionalLight = new THREE.DirectionalLight(0xffffff);
directionalLight.position.set(0, -70, 100).normalize();
this.scene.add(directionalLight);
var directionalLight2 = new THREE.DirectionalLight(0xffffff);
directionalLight2.position.set(0, 70, 100).normalize();
this.scene.add(directionalLight2);
// use the three.js GLTF loader to add the 3D model to the three.js scene
var loader = new THREE.GLTFLoader();
loader.load(
'https://maplibre.org/maplibre-gl-js-docs/assets/34M_17/34M_17.gltf',
function (gltf) {
this.scene.add(gltf.scene);
}.bind(this)
);
this.map = map;
// use the MapLibre GL JS map canvas for three.js
this.renderer = new THREE.WebGLRenderer({
canvas: map.getCanvas(),
context: gl,
antialias: true,
});
this.renderer.autoClear = false;
},
render (gl, matrix) {
var rotationX = new THREE.Matrix4().makeRotationAxis(
new THREE.Vector3(1, 0, 0),
modelTransform.rotateX
);
var rotationY = new THREE.Matrix4().makeRotationAxis(
new THREE.Vector3(0, 1, 0),
modelTransform.rotateY
);
var rotationZ = new THREE.Matrix4().makeRotationAxis(
new THREE.Vector3(0, 0, 1),
modelTransform.rotateZ
);
var m = new THREE.Matrix4().fromArray(matrix);
var l = new THREE.Matrix4()
.makeTranslation(
modelTransform.translateX,
modelTransform.translateY,
map.queryTerrainElevation(modelOrigin) * modelTransform.scale
)
.scale(
new THREE.Vector3(
modelTransform.scale,
-modelTransform.scale,
modelTransform.scale
)
)
.multiply(rotationX)
.multiply(rotationY)
.multiply(rotationZ);
this.camera.projectionMatrix = m.multiply(l);
this.renderer.state.reset();
this.renderer.render(this.scene, this.camera);
this.map.triggerRepaint();
}
};
map.on('style.load', function () {
map.addLayer(customLayer);
});
</script>
</body>
</html>