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Feature: first version of clustering at low zoom levels, filters don't update yet (WIP)

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This commit is contained in:
Pieter Vander Vennet 2025-07-21 12:57:04 +02:00
parent 4e033a93a5
commit 8360ab9a8b
11 changed files with 562 additions and 262 deletions
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24
src/Logic/GeoOperations.ts
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@ -10,11 +10,12 @@ import {
MultiPolygon,
Point,
Polygon,
Position,
Position
} from "geojson"
import { Tiles } from "../Models/TileRange"
import { Utils } from "../Utils"
;("use strict")
("use strict")
export class GeoOperations {
private static readonly _earthRadius: number = 6378137
@ -536,10 +537,23 @@ export class GeoOperations {
* @param features
* @param zoomlevel
*/
public static spreadIntoBboxes(features: Feature[], zoomlevel: number): Map<number, Feature[]> {
const perBbox = new Map<number, Feature[]>()
public static spreadIntoBboxes<T extends Feature = Feature>(features: T[], zoomlevel: number): Map<number, T[]> {
const perBbox = new Map<number, T[]>()
const z = zoomlevel
for (const feature of features) {
if (feature.geometry.type === "Point") {
const [lon, lat] = feature.geometry.coordinates
const tileXYZ = Tiles.embedded_tile(lat, lon, z)
const tileNumber = Tiles.tile_index(z, tileXYZ.x, tileXYZ.y)
let newFeatureList = perBbox.get(tileNumber)
if (newFeatureList === undefined) {
newFeatureList = []
perBbox.set(tileNumber, newFeatureList)
}
newFeatureList.push(feature)
continue
}
const bbox = BBox.get(feature)
const tilerange = bbox.expandToTileBounds(zoomlevel).containingTileRange(zoomlevel)
Tiles.MapRange(tilerange, (x, y) => {