Madison Grubb
aa8a0bd83f
Ingest aircraft and vessel tracks via OSINT feeds and tactical CoT, expose viewport-filtered SSE to the map, and add an OSM ALPR layer with tiled caching and performant marker sync.
32 lines
875 B
JavaScript
32 lines
875 B
JavaScript
import Supercluster from 'supercluster'
|
|
|
|
export function createClusterIndex(options = {}) {
|
|
const index = new Supercluster(options)
|
|
const state = { features: Object.freeze([]) }
|
|
|
|
return {
|
|
load(features) {
|
|
const list = Object.freeze([...(features ?? [])])
|
|
index.load(list)
|
|
state.features = list
|
|
},
|
|
query(view) {
|
|
if (!view || state.features.length === 0) return []
|
|
const { west, south, east, north, zoom } = view
|
|
return index.getClusters(
|
|
[west, south, east, north],
|
|
Math.floor(zoom ?? 14),
|
|
).map((feature) => {
|
|
if (!feature.properties?.cluster) return feature
|
|
return {
|
|
...feature,
|
|
properties: {
|
|
...feature.properties,
|
|
expansionZoom: index.getClusterExpansionZoom(feature.properties.cluster_id),
|
|
},
|
|
}
|
|
})
|
|
},
|
|
}
|
|
}
|