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vcoppe
2024-05-23 12:57:24 +02:00
parent 51495e9bd1
commit 8b5d1f1fbf
7 changed files with 67 additions and 39 deletions
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29
website/src/lib/components/toolbar/tools/routing/Simplify.ts
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@@ -1,4 +1,4 @@
import type { Coordinates, TrackPoint, TrackSegment } from "gpx";
import type { Coordinates, GPXFile, TrackPoint, TrackSegment } from "gpx";
type SimplifiedTrackPoint = { point: TrackPoint, distance?: number };
@@ -15,7 +15,32 @@ 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(segment: TrackSegment) {
export function updateAnchorPoints(file: GPXFile) {
let segments = file.getSegments();
for (let segmentIndex = 0; segmentIndex < segments.length; segmentIndex++) {
let segment = segments[segmentIndex];
if (!segment._data.anchors) { // New segment, compute anchor points for it
computeAnchorPoints(segment);
continue;
}
if (segment.trkpt.length > 0) {
if (!segment.trkpt[0]._data.anchor) { // First point is not an anchor, make it one
segment.trkpt[0]._data.anchor = true;
segment.trkpt[0]._data.zoom = 0;
}
if (!segment.trkpt[segment.trkpt.length - 1]._data.anchor) { // Last point is not an anchor, make it one
segment.trkpt[segment.trkpt.length - 1]._data.anchor = true;
segment.trkpt[segment.trkpt.length - 1]._data.zoom = 0;
}
}
}
}
function computeAnchorPoints(segment: TrackSegment) {
let points = segment.trkpt;
let anchors = ramerDouglasPeucker(points);
anchors.forEach((anchor) => {