qibla library

Qibla direction, great-circle path, and haversine distance for Dart.

Pure math, zero external dependencies. Computes the initial bearing from any point on Earth to the Ka'bah using spherical trigonometry.

Constants

earthRadiusKm → const double

Mean radius of the Earth in kilometers (WGS-84 volumetric mean).

kaabaLat → const double

Latitude of the Ka'bah center, Masjid al-Haram, Mecca (degrees north).

kaabaLng → const double

Longitude of the Ka'bah center, Masjid al-Haram, Mecca (degrees east).

Functions

compassDir(double bearing) → String

Eight-point compass abbreviation for a bearing.

compassName(double bearing) → String

Full compass direction name for a bearing.

distanceKm(double lat1, double lng1, double lat2, double lng2) → double

Haversine distance between two coordinate pairs.

qiblaAngle(double lat, double lng) → double

Qibla bearing in degrees clockwise from true north.

qiblaGreatCircle(double lat, double lng, [int steps = 120]) → List<List<double>>

Great-circle waypoints from (lat, lng) to the Ka'bah.