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Gathering detailed insights and metrics for @twpayne/xcscore

@twpayne/xcscore - 1.0.3 | npmpackage.info

@twpayne/xcscore

Cross country league flight scoring for paragliding

1.0.3

MIT

TypeScript

363.49 kB

2.8

Installations

npm install @twpayne/xcscore

Developer Guide

BETA

Typescript

Yes

Module System

CommonJS

Node Version

13.12.0

NPM Version

6.14.4 Score

Supply Chain

97.2

Quality

75.3

Maintenance

100

Vulnerability

100

License

Pull Requests

Open

0

Total

13

Closed

6

Merged

7

Issues

Open

1

Total

4

Closed

3

Releases

Unable to fetch releases

Languages

TypeScript

JavaScript

TypeScript (99.9%)

JavaScript (0.1%)

Developer

twpayne

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

MIT License

2 Stars

57 Commits

2 Watchers

1 Branches

2 Contributors

Updated on Jul 22, 2024

Maintainers

View All 2 Contributors

Package Meta Information

Latest Version

1.0.3

Package Id

@twpayne/xcscore@1.0.3

Unpacked Size

363.49 kB

Size

85.79 kB

File Count

NPM Version

6.14.4

Node Version

13.12.0

Total Downloads

Cumulative downloads

Total Downloads

NaN

Last Day

NaN

Compared to previous day

Last Week

NaN

Compared to previous week

Last Month

NaN

Compared to previous month

Last Year

NaN

Compared to previous year

Weekly Downloads

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Yearly Downloads

Dev Dependencies

@types/benchmark @types/jest @types/node benchmark jest ts-jest ts-node tslint tslint-consistent-codestyle typedoc typescript

xcscore

Cross country league flight scoring for paragliding.

Introduction

xcscore computes the highest scoring flight from an array of coords according to the World XContest and Swiss Cross Country Cup rules. It is designed for use in XC flight planning software like XC Planner. It uses crude brute force algorithms that support only a small number of coordinates and is not suitable for scoring flights from GPS tracklogs.

API overview

xcscore exports two functions:

scoreWorldXContest for scoring flights according to the World XContest rules.
scoreCHCrossCountryCup for scoring flights according to the Swiss Cross Country Cup rules.

Each function takes a single object as an argument with two properties:

coords: an array of coordinates.
distKMFunc: a function that returns the distance in kilometers between two coordinates.

Each function returns a single object describing the highest scoring flight found with five properties:

flightType: the type of the flight, e.g. "openDist", "flatTri", or "faiTri". For a full list of flight types see the documentation.
dist: the scoring distance of the flight.
multiplier: the scoring multiplier for the type of flight.
score: the score of the flight. Note that this is not necessarily equal to the product of dist and multiplier due to rounding rules.
coords: the coordinates of the start, up to three turnpoints, and end of the scoring part of the flight.

If no scoring flight can be found (e.g. because there are fewer than two input coords) then the returned object will have flightType "none", dist, multiplier, and score 0, and coords [].

For a full description of the API, consult the documentation in the dist/docs directory.

Performance

xcscore uses simple brute force algorithms for implementation simplicity and minimal code size. CPU usage increases with O(N^5) and memory usage with O(N^2) so xscore is heavily CPU bound.

The package includes benchmarks to measure performance, the results of which depend heavily on the CPU. As a rough guide, 25 coords is fine on any machine (scored in approximately less than 2ms on a single core of a 2014-era MacBook Pro), whereas 50 coords is a reasonable upper limit (taking 60ms on the same machine).

More sophisticated algorithms are used for scoring real GPS tracklogs with tens of thousands of points. Contact the author for details.

Use with popular JavaScript mapping libraries

xcscore is independent of the coordinate format and the function to compute the distance between two coordinates. As such, it can be used with any mapping library.

Google Maps JavaScript API

coords can be an array of google.maps.LatLngs and you can use the following function as distKMFunc:

1function distKM(latLng1, latLng2) {
2    return google.maps.geometry.spherical.computeDistanceBetween(latLng1, latLng2, 6371);
3}

LeafletJS

coords can be an array of LatLngs and you can use the following function as distKMFunc:

1function distKM(latLng1, latLng2) {
2    return latLng1.distanceTo(latLng2)/1000;
3}

License

MIT

No vulnerabilities found.

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

License

Determines if the project has defined a license.

4

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

1

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

Maintained

Determines if the project is "actively maintained".

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Security-Policy

Determines if the project has published a security policy.

0

Fuzzing

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0

Branch-Protection

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0

SAST

Determines if the project uses static code analysis.

0

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

Score

2.8

/10

Last Scanned on 2025-07-07

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