qibla

Qibla direction, great-circle path, and haversine distance for Dart and Flutter. Pure math, zero dependencies.

Installation

dependencies:
  qibla: ^1.0.0

Quick Start

import 'package:qibla/qibla.dart';

// Bearing from New York to the Ka'bah
final bearing = qiblaAngle(40.7128, -74.006);
print(bearing);             // ~58.48
print(compassDir(bearing)); // NE

// Distance in kilometers
final km = distanceKm(40.7128, -74.006, kaabaLat, kaabaLng);
print(km); // ~9634

API

Function	Returns	Description
`qiblaAngle(lat, lng)`	`double`	Bearing to Ka'bah, degrees clockwise from north
`compassDir(bearing)`	`String`	Eight-point abbreviation: N, NE, E, SE, S, SW, W, NW
`compassName(bearing)`	`String`	Full name: North, Northeast, ...
`qiblaGreatCircle(lat, lng, [steps])`	`List<List<double>>`	Great-circle waypoints to the Ka'bah
`distanceKm(lat1, lng1, lat2, lng2)`	`double`	Haversine distance in km

Constants: kaabaLat (21.422511), kaabaLng (39.82615), earthRadiusKm (6371).

Full reference: API Reference.

Architecture

All calculations use the forward azimuth formula from spherical trigonometry. Great-circle paths use Slerp. Distance uses the haversine formula. Ka'bah coordinates are fixed constants verified against published GPS surveys.

Compatibility

Dart 3.7+. Works with Flutter and standalone Dart.

qibla (npm) - The TypeScript version of this package.
pray-calc-dart - Islamic prayer times calculator for Dart.

License

MIT

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