[英]Cannot get features from building source layer in Mapbox GL
我在這里想要實現的是在有人搜索地址時粉刷建築物。 這可以通過 map on click 事件來實現。 但它不適用於地理編碼器結果事件。 要從構建層獲取功能,我必須將 {x, y} 指向可以通過點擊事件實現的層。 但是當我使用地理編碼器“結果”事件時,它給出的是 {latitude, longitude} 坐標而不是 {x, y} 點。 我還嘗試使用 map.project() 轉換這些坐標,但沒有正確指向。 有沒有解決方法來實現這一點? 檢查我的代碼:
const bounds = [
[-97.846976993, 30.167105159], // Southwest coordinates
[-97.751211018, 30.242129961], // Northeast coordinates
];
const map = new mapboxgl.Map({
container: "map",
style: "mapbox://styles/smallcrowd/cl07a4926001b15pnu5we767g",
center: [-79.4512, 43.6568],
zoom: 13,
// maxBounds: bounds,
});
// Add the control to the map.
const geocoder = new MapboxGeocoder({
accessToken: mapboxgl.accessToken,
mapboxgl: mapboxgl,
});
map.on("load", function () {
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": "building",
type: "fill",
minzoom: 10,
paint: {
"fill-color": "#aaa",
},
},
labelLayerId
);
map.addSource("currentBuildings", {
type: "geojson",
data: {
type: "FeatureCollection",
features: [],
},
});
map.addLayer(
{
id: "highlight",
source: "currentBuildings",
type: "fill",
minzoom: 15,
paint: {
"fill-color": "#f00",
},
},
labelLayerId
);
// Working perfectly on click, it is painting the address but I do not want the address to be clicked rather it should be painted on searched.
map.on("click", "3d-buildings", (e) => {
map.getSource("currentBuildings").setData({
type: "FeatureCollection",
features: e.features,
});
});
//not working because the 3d-building layer wants input as x,y point which I tried to convert result's coordinates into point but map.project is giving wrong points as compared to mouse clicked points
geocoder.on("result", (e) => {
var coordinates = e.result.geometry.coordinates;
const point = map.project(coordinates);
const selectedFeatures = map.queryRenderedFeatures(point, {
layers: ["3d-buildings"],
});
console.log(point);
map.getSource("currentBuildings").setData({
type: "FeatureCollection",
features: selectedFeatures.features,
});
});
});
任何幫助將不勝感激 !
所以如果我理解正確的話:
很簡單:它恰好位於視口的中心。 所以你可以做類似的事情:
const x = map.getContainer().getClientRects()[0].width / 2;
const y = map.getContainer().getClientRects()[0].height / 2;
在第 1 步之后,您可能需要等到 map 實際完成移動並加載源功能。我會使用map.once('idle', ...)
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