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Pickable 3D buildings with feature state and buildings plus
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Highlight 3D Building By ID</title> | |
| <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" /> | |
| <script src="https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.js"></script> | |
| <link href="https://api.tiles.mapbox.com/mapbox-gl-js/v0.53.0/mapbox-gl.css" rel="stylesheet" /> | |
| <style> | |
| body { | |
| margin: 0; | |
| padding: 0; | |
| } | |
| #map { | |
| position: absolute; | |
| top: 0; | |
| bottom: 0; | |
| width: 100%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="map"></div> | |
| <script> | |
| mapboxgl.accessToken = | |
| "pk.eyJ1IjoiZGF2aWQtd2lja3MiLCJhIjoiY2p4Nmx3cjhzMDEybjN4c3gzbzh3cTZncyJ9.PTQf1HJSLa-qzXCeY-NIHw"; | |
| var map = new mapboxgl.Map({ | |
| style: "mapbox://styles/david-wicks/cjsgl6i5b43cc1frlz1o4uolc", | |
| center: [-74.0066, 40.7135], | |
| zoom: 15.5, | |
| pitch: 45, | |
| bearing: -17.6, | |
| container: "map", | |
| hash: true | |
| }); | |
| // The 'building' layer in the mapbox-streets vector source contains building-height | |
| // data from OpenStreetMap. | |
| map.on("load", function() { | |
| // Insert the layer beneath any symbol layer. | |
| var layers = map.getStyle().layers; | |
| var labelLayerId; | |
| for (var i = 0; i < layers.length; i++) { | |
| if (layers[i].type === "symbol" && layers[i].layout["text-field"]) { | |
| labelLayerId = layers[i].id; | |
| break; | |
| } | |
| } | |
| map.addLayer( | |
| { | |
| id: "3d-buildings", | |
| source: "composite", | |
| "source-layer": "buildings_plus", | |
| filter: ["==", "extrude", "true"], | |
| type: "fill-extrusion", | |
| minzoom: 14, | |
| paint: { | |
| // color based on feature state | |
| "fill-extrusion-color": ["match", ["feature-state", "highlight"], "true", "#F0F", "#09F"], | |
| // use an 'interpolate' expression to add a smooth transition effect to the | |
| // buildings as the user zooms in | |
| "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 | |
| } | |
| }, | |
| labelLayerId | |
| ); | |
| map.on("click", e => { | |
| const features = map.queryRenderedFeatures(e.point, { layers: ["3d-buildings"] }); | |
| const feature = features[0]; | |
| if (feature) { | |
| selectFeature(feature.id); | |
| } | |
| }); | |
| const selectFeature = (() => { | |
| let previous; | |
| return id => { | |
| if (id !== previous && previous !== undefined) { | |
| map.setFeatureState( | |
| { source: "composite", sourceLayer: "buildings_plus", id: previous }, | |
| { highlight: "false" } | |
| ); | |
| } | |
| previous = id; | |
| map.setFeatureState({ source: "composite", sourceLayer: "buildings_plus", id }, { highlight: "true" }); | |
| }; | |
| })(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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