Dynamically render subnets and grid lines
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@ -201,7 +201,6 @@
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touchPitch: false,
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style: {
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version: 8,
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glyphs: "assets/glyphs/{fontstack}/{range}.pbf",
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sources: {},
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layers: []
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},
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@ -213,12 +212,48 @@
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map.painter.context.extTextureFilterAnisotropic = undefined
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map.touchZoomRotate.disableRotation()
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const tileSize = 256
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const tilesDir = "assets/tiles"
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const tilesId = "ipmap-tiles"
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const privateRangesId = "private-ranges"
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const subnetsId = "subnets"
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const dataP = fetch(`${tilesDir}/tiles.json`, { cache: "no-store" }).then(res => res.json())
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const privateRangePatternP = map.loadImage("assets/private-range-pattern.png")
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const canvas = document.createElement("canvas")
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const canvasScale = window.devicePixelRatio
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canvas.width = tileSize * canvasScale
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canvas.height = tileSize * canvasScale
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const ctx = canvas.getContext("2d")
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ctx.scale(canvasScale, canvasScale)
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ctx.fillStyle = "white"
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ctx.lineWidth = 3
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ctx.font = "bold 20px sans-serif"
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maplibregl.addProtocol(subnetsId, async (params, abortController) => {
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console.log(params.url)
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const [z, y, x] = params.url.split("://")[1].split("/")
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const width = 2 ** z
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const subnet = 2 * z
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const hy = Math.floor(0x10000 * (y / width))
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const hx = Math.floor(0x10000 * (x / width))
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const text = ipToRange(coordsToHilbert({ x: hx, y: hy }), subnet)
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const metrics = ctx.measureText(text)
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const cy = tileSize / 2 + metrics.actualBoundingBoxAscent / 2
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const cx = tileSize / 2 - metrics.actualBoundingBoxRight / 2
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ctx.clearRect(0, 0, tileSize, tileSize)
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ctx.moveTo(0, 0)
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ctx.lineTo(tileSize, 0)
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ctx.lineTo(tileSize, tileSize)
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ctx.lineTo(0, tileSize)
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ctx.lineTo(0, 0)
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ctx.strokeStyle = "white"
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ctx.stroke()
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ctx.strokeStyle = "black"
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ctx.strokeText(text, cx, cy)
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ctx.fillText(text, cx, cy)
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return { data: await new Promise((res, rej) => canvas.toBlob(b => b.arrayBuffer().then(res))) }
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})
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map.once("style.load", async () => {
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const data = await dataP
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const flatData = Object.entries(data)
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@ -239,7 +274,7 @@
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map.addSource(tilesId, {
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type: "raster",
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tiles: [`${tilesDir}/${curDate}/${curVariant}/${curColormap}/{z}/{y}/{x}.png`],
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tileSize: 256,
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tileSize,
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minzoom: 0,
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maxzoom: 8,
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})
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@ -295,99 +330,19 @@
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type: "fill",
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source: privateRangesId,
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paint: {
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"fill-color": "#0000FF",
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"fill-pattern": privateRangePatternId
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}
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})
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const zoomLevels = 8
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;[...Array(zoomLevels)].map((_, i) => i + 1).forEach(z => {
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const labelsId = `subnet-labels-${z}`
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const width = 2 ** z
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const subnet = 2 * z
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const moff = 0.5 / width
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const hoff = Math.floor(0x10000 * moff)
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map.addSource(labelsId, {
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type: "geojson",
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data: {
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type: "FeatureCollection",
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features: [...Array(width)].flatMap((_, y) => {
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const ny = y / width
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const my = ny + moff
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const hy = Math.floor(0x10000 * ny)
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return [...Array(width)].map((_, x) => {
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const nx = x / width
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const mx = nx + moff
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const hx = Math.floor(0x10000 * nx)
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return {
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type: "Feature",
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geometry: {
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type: "Point",
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coordinates: new maplibregl.MercatorCoordinate(mx, my, 0).toLngLat().toArray()
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},
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properties: {
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name: ipToRange(coordsToHilbert({ x: hx, y: hy }), subnet)
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}
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}
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})
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})
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}
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map.addSource(subnetsId, {
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type: "raster",
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tiles: [`${subnetsId}://{z}/{y}/{x}`],
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tileSize,
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})
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map.addLayer({
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id: labelsId,
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type: "symbol",
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source: labelsId,
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minzoom: Math.max(z - 1.5, 0),
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...(z < zoomLevels ? { maxzoom: z - 0.5 } : {}),
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layout: {
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"text-field": "{name}",
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"text-font": ["Open Sans Bold"],
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"text-size": 22
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},
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paint: {
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"text-color": "#FFFFFF"
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}
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})
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const gridId = `grid-lines-${z}`
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map.addSource(gridId, {
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type: "geojson",
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data: {
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type: "FeatureCollection",
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features: [...Array(width + 1)].map((_, i) => i / width).flatMap(i => [
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{
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type: "Feature",
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geometry: {
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type: "LineString",
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coordinates: [
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new maplibregl.MercatorCoordinate(i, 0, 0).toLngLat().toArray(),
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new maplibregl.MercatorCoordinate(i, 1, 0).toLngLat().toArray(),
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]
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}
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}, {
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type: "Feature",
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geometry: {
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type: "LineString",
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coordinates: [
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new maplibregl.MercatorCoordinate(0, i, 0).toLngLat().toArray(),
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new maplibregl.MercatorCoordinate(1, i, 0).toLngLat().toArray(),
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]
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}
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}
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])
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}
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})
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map.addLayer({
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id: gridId,
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type: "line",
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source: gridId,
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minzoom: Math.max(z - 1.5, 0),
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...(z < zoomLevels ? { maxzoom: z - 0.5 } : {}),
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paint: {
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"line-color": "#FFFFFF",
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"line-width": 3
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}
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})
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id: subnetsId,
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type: "raster",
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source: subnetsId,
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})
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const setStyle = (date, variant, colormap) => {
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