Created
November 12, 2019 10:27
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Mapbox GL JS Workshop Custom Layer
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<meta name="viewport" content="width=device-width"> | |
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v1.5.0/mapbox-gl.js'></script> | |
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v1.5.0/mapbox-gl.css' rel='stylesheet' /> | |
<script src='https://unpkg.com/three@0.106.2/build/three.min.js'></script> | |
<script src="https://unpkg.com/three@0.106.2/examples/js/loaders/GLTFLoader.js"></script> | |
<style> | |
body { | |
margin: 0; | |
padding: 0; | |
} | |
#map { | |
position: absolute; | |
width: 100%; | |
height: 100%; | |
} | |
</style> | |
</head> | |
<body> | |
<div id='map'></div> | |
<script> | |
mapboxgl.accessToken = 'pk.eyJ1IjoiYWxhbnRnZW8tcHJlc2FsZXMiLCJhIjoiY2pxcmZ1cW1mMG1tcDN4bDVvYzA4MWg5MyJ9.7QtVj_0ythHwEg1n_zaRTQ'; | |
var map = new mapboxgl.Map({ | |
container: 'map', | |
style: { | |
version: 8, | |
sources: { | |
countries: { | |
type: 'geojson', | |
data: 'https://www.alantgeo.com.au/share/countries.geojson', | |
generateId: true | |
}, | |
cities: { | |
type: 'geojson', | |
data: 'https://www.alantgeo.com.au/share/cities.geojson' | |
} | |
}, | |
glyphs: 'mapbox://fonts/mapbox/{fontstack}/{range}.pbf', | |
layers: [ | |
{ | |
id: 'background', | |
type: 'background', | |
paint: { | |
'background-color': 'lightblue' | |
} | |
}, | |
{ | |
id: 'country-fill', | |
type: 'fill', | |
source: 'countries', | |
paint: { | |
'fill-color': [ | |
'case', | |
['boolean', ['feature-state', 'hover'], false], | |
'#c5b5a9', | |
'#ffebda' | |
] | |
} | |
}, | |
{ | |
id: 'country-line', | |
type: 'line', | |
source: 'countries', | |
paint: { | |
'line-width': 0.5 | |
} | |
}, | |
{ | |
id: 'city-dot', | |
type: 'circle', | |
source: 'cities', | |
paint: { | |
'circle-color': 'white', | |
'circle-radius': 3, | |
'circle-stroke-width': 1, | |
'circle-stroke-color': 'black' | |
} | |
}, | |
{ | |
id: 'city-label', | |
type: 'symbol', | |
source: 'cities', | |
paint: { | |
'text-halo-color': 'white', | |
'text-halo-width': 2 | |
}, | |
layout: { | |
'text-field': ['get', 'name'], | |
'text-variable-anchor': ['left', 'right', 'top-left', 'bottom-left', 'top-right', 'bottom-right'], | |
'text-justify': 'auto', | |
'text-radial-offset': 0.2, | |
'text-size': [ | |
'interpolate', ['linear'], | |
['zoom'], | |
// zoom 4 or less -> size is 10 | |
2, 10, | |
// zoom 6 or more -> size is 14 | |
3, 14 | |
] | |
} | |
} | |
] | |
}, | |
antialias: true | |
}) | |
var navigation = new mapboxgl.NavigationControl({ | |
visualizePitch: true | |
}); | |
map.addControl(navigation, 'top-right'); | |
var geolocate = new mapboxgl.GeolocateControl({ | |
positionOptions: { | |
enableHighAccuracy: true | |
}, | |
trackUserLocation: true | |
}); | |
map.addControl(geolocate, 'top-right'); | |
var fullscreen = new mapboxgl.FullscreenControl(); | |
map.addControl(fullscreen, 'top-right'); | |
var scale = new mapboxgl.ScaleControl({ | |
unit: 'metric' | |
}); | |
map.addControl(scale, 'bottom-right'); | |
var marker = new mapboxgl.Marker({ | |
color: 'darkred', | |
draggable: true | |
}) | |
.setLngLat([175, -45]) | |
.addTo(map); | |
var hoveredCountry; | |
map.on('mousemove', 'country-fill', function (e) { | |
map.getCanvas().style.cursor = 'pointer'; | |
if (e.features.length) { | |
if (hoveredCountry) { | |
map.setFeatureState({ | |
source: 'countries', | |
id: hoveredCountry | |
}, { | |
hover: false | |
}); | |
} | |
hoveredCountry = e.features[0].id; | |
map.setFeatureState({ | |
source: 'countries', | |
id: hoveredCountry | |
}, { | |
hover: true | |
}); | |
} | |
}); | |
map.on('mouseleave', 'country-fill', function (e) { | |
map.getCanvas().style.cursor = ''; | |
if (hoveredCountry) { | |
map.setFeatureState({ | |
source: 'countries', | |
id: hoveredCountry | |
}, { | |
hover: false | |
}); | |
hoveredCountry = null; | |
} | |
}); | |
map.on('click', 'country-fill', function (e) { | |
var popup = new mapboxgl.Popup() | |
.setText(e.features[0].properties.ADMIN) | |
.setLngLat(e.lngLat) | |
.addTo(map) | |
map.fitBounds(e.features[0].properties.bbox.split(','), { | |
padding: 20 | |
}); | |
}); | |
// parameters to ensure the model is georeferenced correctly on the map | |
var modelOrigin = [175.880, -38.801]; | |
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() * 1000000 | |
}; | |
var THREE = window.THREE; | |
var customLayer = { | |
id: 'pokemon', | |
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://www.alantgeo.com.au/share/bulbasaur.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); | |
}); | |
</script> | |
</body> | |
</html> |
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