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Mapbox + Three
{
let container = html`<div style='height:400px;' />`;
let center = [-77.0709, 38.9083]; // Georgetown
center = [-77.0382, 38.8467]; // DCA
center = [-77.030, 38.889]; // the mall
let sources = { 'raster-tiles': {
type: 'raster',
'tiles': ['https://stamen-tiles.a.ssl.fastly.net/terrain/{z}/{x}/{y}.jpg'],
tileSize: 256,
'attribution':
'Map tiles by <a target="_top" rel="noopener" href="http://stamen.com">Stamen Design</a>, under <a target="_top" rel="noopener" href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data by <a target="_top" rel="noopener" href="http://openstreetmap.org">OpenStreetMap</a>, under <a target="_top" rel="noopener" href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>'
} };
let layers = [{
'id': 'simple-tiles',
'type': 'raster',
'source': 'raster-tiles',
'minzoom': 0,
'maxzoom': 22
}];
// Give the container dimensions.
yield container;
let style = {
version: 8,
sources: sources,
layers: layers,
// center: center,
// zoom: 4,
// pitch: 30
};
let map = new mapboxgl.Map({
container,
// style: 'mapbox://styles/mapbox/streets-v10',
style: style,
center,
zoom: 17,
bearing: 80,
pitch: 70,
interactive: true,
antialias: true // create the gl context with MSAA antialiasing, so custom layers are antialiased
})
// 3D buildings
map.on('load', () => {
map.addLayer({
id: '3d-buildings',
source: 'composite',
'source-layer': 'building',
filter: ['==', 'extrude', 'true'],
type: 'fill-extrusion',
minzoom: 15,
paint: {
'fill-extrusion-color': '#aaa',
'fill-extrusion-height': ['interpolate', ['linear'], ['zoom'], 15, 0, 15.05, ['get', 'height']],
'fill-extrusion-base': ['interpolate', ['linear'], ['zoom'], 15, 0, 15.05, ['get', 'min_height']],
'fill-extrusion-opacity': 0.6
}
})
});
// parameters to ensure the model is georeferenced correctly on the map
var modelOrigin = [-77.030, 38.8895];
var modelAltitude = 0;
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()
};
// 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();
// 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://docs.mapbox.com/mapbox-gl-js/assets/34M_17/34M_17.gltf',
function(gltf) {
this.scene.add(gltf.scene);
}.bind(this)
);
this.map = map;
// use the Mapbox GL JS map canvas for three.js
this.renderer = new THREE.WebGLRenderer({
canvas: map.getCanvas(),
context: gl,
antialias: true
});
this.renderer.autoClear = false;
},
render: function(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,
modelTransform.translateZ
)
.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);
});
invalidation.then(() => map.remove());
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
