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more refactoring

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vcoppe
2024-09-16 14:03:06 +02:00
parent 4ebf2b6fa9
commit 29a78e8af3
1 changed files with 26 additions and 24 deletions
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50
gpx/src/gpx.ts
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@@ -806,30 +806,8 @@ export class TrackSegment extends GPXTreeLeaf {
return distanceWindowSmoothingWithDistanceAccumulator(points, 50, (accumulated, start, end) => 100 * ((points[end].ele ?? 0) - (points[start].ele ?? 0)) / (accumulated > 0 ? accumulated : 1));
}
_computeSlopeSegments(statistics: GPXStatistics, epsilon = 20): [number[], number[]] {
// x-coordinates are given by: statistics.local.distance.total[point._data.index] * 1000
// y-coordinates are given by: point.ele
// Compute the distance between point3 and the line defined by point1 and point2
function elevationDistance(point1: TrackPoint, point2: TrackPoint, point3: TrackPoint): number {
if (point1.ele === undefined || point2.ele === undefined || point3.ele === undefined) {
return 0;
}
let x1 = statistics.local.distance.total[point1._data.index] * 1000;
let x2 = statistics.local.distance.total[point2._data.index] * 1000;
let x3 = statistics.local.distance.total[point3._data.index] * 1000;
let y1 = point1.ele;
let y2 = point2.ele;
let y3 = point3.ele;
let dist = Math.sqrt(Math.pow(y2 - y1, 2) + Math.pow(x2 - x1, 2));
if (dist === 0) {
return Math.sqrt(Math.pow(x3 - x1, 2) + Math.pow(y3 - y1, 2));
}
return Math.abs((y2 - y1) * x3 - (x2 - x1) * y3 + x2 * y1 - y2 * x1) / dist;
}
let simplified = ramerDouglasPeucker(this.trkpt, 20, elevationDistance);
_computeSlopeSegments(statistics: GPXStatistics): [number[], number[]] {
let simplified = ramerDouglasPeucker(this.trkpt, 20, getElevationDistanceFunction(statistics));
let slope = [];
let length = [];
@@ -1463,6 +1441,30 @@ export function distance(coord1: TrackPoint | Coordinates, coord2: TrackPoint |
return maxMeters;
}
export function getElevationDistanceFunction(statistics: GPXStatistics) {
// x-coordinates are given by: statistics.local.distance.total[point._data.index] * 1000
// y-coordinates are given by: point.ele
// Compute the distance between point3 and the line defined by point1 and point2
return (point1: TrackPoint, point2: TrackPoint, point3: TrackPoint) => {
if (point1.ele === undefined || point2.ele === undefined || point3.ele === undefined) {
return 0;
}
let x1 = statistics.local.distance.total[point1._data.index] * 1000;
let x2 = statistics.local.distance.total[point2._data.index] * 1000;
let x3 = statistics.local.distance.total[point3._data.index] * 1000;
let y1 = point1.ele;
let y2 = point2.ele;
let y3 = point3.ele;
let dist = Math.sqrt(Math.pow(y2 - y1, 2) + Math.pow(x2 - x1, 2));
if (dist === 0) {
return Math.sqrt(Math.pow(x3 - x1, 2) + Math.pow(y3 - y1, 2));
}
return Math.abs((y2 - y1) * x3 - (x2 - x1) * y3 + x2 * y1 - y2 * x1) / dist;
}
}
function distanceWindowSmoothing(points: TrackPoint[], distanceWindow: number, accumulate: (index: number) => number, compute: (accumulated: number, start: number, end: number) => number, remove?: (index: number) => number): number[] {
let result = [];