mapbox-gl开发中如何画圆

这篇文章主要介绍mapbox-gl开发中如何画圆，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

function metersToPixelsAtMaxZoom(meters, latitude) {

return meters / 0.075 / Math.cos(latitude * Math.PI / 180)

}

map.addSource("circle_source", {

"type": "geojson",

"data": {

"type": "FeatureCollection",

"features": [{

"type": "Feature",

"geometry": {

"type": "Point",

"coordinates": [110.132, 21.768]

} 

}]

}

});

map.addLayer({

"id": "circle_layer",

//类型设置

"type": "circle",

//数据源id设置

"source": "circle_source",

"paint": {

   //关键处，设置圆的半径随地图缩放而变化

"circle-radius": {

stops: [

                        [0, 0],

[20, _pixelRadius]],

base: 2

},

                    //设置圆的其他属性

"circle-opacity": 0.5,

"circle-stroke-width": 1,

"circle-color": "#00f",

"circle-pitch-alignment": "map"

}

});