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routing progress

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This commit is contained in:
vcoppe
2024-04-25 19:02:34 +02:00
parent 7ef19adf53
commit fec275574c
5 changed files with 182 additions and 47 deletions
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27
website/src/lib/components/routing/Simplify.ts
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@@ -1,6 +1,6 @@
import type { Coordinates, GPXFile, TrackPoint } from "gpx";
import type { Coordinates, TrackPoint, TrackSegment } from "gpx";
export type SimplifiedTrackPoint = { point: TrackPoint, distance?: number, zoom?: number };
export type SimplifiedTrackPoint = { point: TrackPoint, distance?: number, zoom?: number, marker?: mapboxgl.Marker };
const earthRadius = 6371008.8;
@@ -15,27 +15,22 @@ export function getZoomLevelForDistance(latitude: number, distance?: number): nu
return Math.min(20, Math.max(0, Math.floor(Math.log2((earthRadius * Math.cos(lat)) / distance))));
}
export function computeAnchorPoints(file: GPXFile) {
for (let segment of file.getSegments()) {
let points = segment.trkpt;
let anchors = ramerDouglasPeucker(points);
anchors.forEach((point) => {
point.zoom = getZoomLevelForDistance(point.point.getLatitude(), point.distance);
});
segment._data['anchors'] = anchors;
}
export function computeAnchorPoints(segment: TrackSegment) {
let points = segment.trkpt;
let anchors = ramerDouglasPeucker(points);
anchors.forEach((point) => {
point.zoom = getZoomLevelForDistance(point.point.getLatitude(), point.distance);
});
segment._data['anchors'] = anchors;
}
export function ramerDouglasPeucker(points: TrackPoint[], epsilon: number = 50, start: number = 0, end: number = points.length - 1): SimplifiedTrackPoint[] {
let simplified = [{
point: points[start],
index: start,
point: points[start]
}];
ramerDouglasPeuckerRecursive(points, epsilon, start, end, simplified);
simplified.push({
point: points[end],
index: end
point: points[end]
});
return simplified;
}