$ cat trips.json
[{"vendor":0,"path":[[139.8007914,35.5144044],[139.9108676,35.4396142]],"timestamps":[0,600]},{"vendor":1,"path":[[139.9108139,35.439529],[139.8008987,35.5140027]],"timestamps":[0,600]}]
$ wget https://raw.githubusercontent.com/visgl/deck.gl-data/master/examples/trips/trips-v7.json
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deck.gl trips-layer animation: reading trips files dropped-onto
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| <html> | |
| <head> | |
| <script src="https://unpkg.com/deck.gl@^8.6.5/dist.min.js"></script> | |
| <script src="https://unpkg.com/@deck.gl/carto@^8.6.5/dist.min.js"></script> | |
| <script src="https://libs.cartocdn.com/mapbox-gl/v1.13.0/mapbox-gl.js"></script> | |
| <link href="https://libs.cartocdn.com/mapbox-gl/v1.13.0/mapbox-gl.css" rel="stylesheet" /> | |
| <script src="https://cdn.jsdelivr.net/npm/@turf/turf@5/turf.min.js"></script> | |
| <style> | |
| body { margin:0; padding:0; } | |
| #map { position:absolute; top:0; bottom:0; width:100%; background-color: black;} | |
| </style> | |
| </head> | |
| <body><div id='map'></div></body> | |
| <script type="text/javascript"> | |
| const ANIMATION_SPEED = 20; | |
| const INITIAL_PAUSE = 1; | |
| const colors = {0: [253, 128, 93], 'others': [23, 184, 190]}; | |
| const getColor = i => { | |
| if (typeof i === 'undefined' || !(i in colors)) {i = 'others'}; | |
| return colors[i]; | |
| } | |
| new deck.DeckGL({ | |
| container: 'map', | |
| mapStyle: deck.carto.BASEMAP.DARK_MATTER, | |
| initialViewState: {longitude: 60, latitude: 0, zoom: 1} | |
| }); | |
| drawTrips([{"vendor":0,"path":[[139.8007914,35.5144044],[139.9108676,35.4396142]],"timestamps":[0,600]},{"vendor":1,"path":[[139.9108139,35.439529],[139.8008987,35.5140027]],"timestamps":[0,600]}]); | |
| const setDropArea = (area) => { | |
| area.ondragover = () => false; | |
| area.ondrop = async event => { | |
| event.preventDefault(); | |
| const promises = []; | |
| for (const file of event.dataTransfer.files) { | |
| if (file.name.split('.').pop() == 'json') { | |
| promises.push(file.text()); | |
| } | |
| } | |
| const results = await Promise.all(promises); | |
| drawTrips(results.map(JSON.parse).flat()); | |
| return false; | |
| }; | |
| } | |
| setDropArea(document.getElementById('map')); | |
| function bbox(json) { | |
| let points = []; | |
| for (let e of json){ | |
| points = points.concat(e.path); | |
| } | |
| const b = turf.bbox(turf.multiPoint(points)) | |
| return [[b[0], b[3]], [b[2], b[1]]]; | |
| } | |
| function interval_timestamps(json) { | |
| let timestamps = []; | |
| for (let e of json){ | |
| timestamps = timestamps.concat(e.timestamps); | |
| } | |
| return [Math.min(...timestamps), Math.max(...timestamps)]; | |
| } | |
| function drawTrips(json) { | |
| const interval = interval_timestamps(json); | |
| interval[0] -= ANIMATION_SPEED * INITIAL_PAUSE; | |
| const view = new deck.WebMercatorViewport({width: document.body.clientWidth, height: document.body.clientHeight}); | |
| deck.carto.setDefaultCredentials({ | |
| username: 'public', | |
| apiKey: 'default_public', | |
| }); | |
| const deckgl = new deck.DeckGL({ | |
| container: 'map', | |
| mapStyle: deck.carto.BASEMAP.DARK_MATTER, | |
| initialViewState: view.fitBounds(bbox(json)), | |
| controller: true | |
| }); | |
| const map = deckgl.getMapboxMap(); | |
| map.addControl(new mapboxgl.ScaleControl({ | |
| maxWidth: 160, | |
| unit: 'metric' | |
| })); | |
| let time = 0; | |
| const RATE_ANIMATION_FRAME = 50; | |
| function animate() { | |
| time = (time + ANIMATION_SPEED/RATE_ANIMATION_FRAME) % (interval[1] - interval[0]); | |
| window.requestAnimationFrame(animate); | |
| } | |
| setInterval(() => { | |
| deckgl.setProps({ | |
| layers: [ | |
| new deck.TripsLayer({ | |
| id: 'trips-layer', | |
| data: json, | |
| getPath: d => d.path, | |
| getTimestamps: d => d.timestamps, | |
| getColor: d => getColor(d.vendor), | |
| opacity: 0.8, | |
| widthMinPixels: 3, | |
| jointRounded: true, | |
| capRounded: true, | |
| trailLength: 180, | |
| currentTime: time + interval[0], | |
| shadowEnabled: false | |
| }) | |
| ] | |
| }); | |
| }, 50); | |
| window.requestAnimationFrame(animate); | |
| } | |
| </script> | |
| </html> |
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