mirror of
https://github.com/acamarata/qibla-dart.git
synced 2026-07-02 03:40:40 +00:00
cc3c227d2d
* chore: surface-area parity audit vs qibla-js, bump to v1.0.1 Full gap analysis: qibla-dart already matches @acamarata/qibla on all five public functions (qiblaAngle, compassDir, compassName, qiblaGreatCircle, distanceKm) and three constants (kaabaLat, kaabaLng, earthRadiusKm). No runtime gaps found; 48/48 tests pass unchanged. Patch bump documents the audit and closes T-E10-01 (Mega Phase 1). * docs: add CHANGELOG.md for v1.0.1 release * chore: polish pubspec, add wiki docs
50 lines
1.3 KiB
Markdown
50 lines
1.3 KiB
Markdown
# Advanced Usage
|
|
|
|
## Great-Circle Path
|
|
|
|
Compute N interpolated waypoints along the great-circle route from your location to the Ka'bah:
|
|
|
|
```dart
|
|
import 'package:qibla/qibla.dart';
|
|
|
|
void main() {
|
|
// 5 waypoints from New York to Makkah
|
|
final path = greatCirclePath(40.7128, -74.0060, kaabaLat, kaabaLng, 5);
|
|
|
|
for (final point in path) {
|
|
print('${point.latitude.toStringAsFixed(4)}, ${point.longitude.toStringAsFixed(4)}');
|
|
}
|
|
}
|
|
```
|
|
|
|
The path uses spherical linear interpolation (Slerp) and returns `n` evenly spaced coordinates including the start and end points.
|
|
|
|
## Custom Destination
|
|
|
|
`distanceKm` and `greatCirclePath` work with any two points, not just the Ka'bah:
|
|
|
|
```dart
|
|
// Distance between two mosques
|
|
final km = distanceKm(51.5074, -0.1278, 40.7128, -74.0060);
|
|
print('London to New York: ${km.toStringAsFixed(0)} km');
|
|
|
|
// Path from Istanbul to Makkah
|
|
final path = greatCirclePath(41.0082, 28.9784, kaabaLat, kaabaLng, 10);
|
|
```
|
|
|
|
## Flutter Compass Widget Integration
|
|
|
|
```dart
|
|
import 'package:qibla/qibla.dart';
|
|
|
|
// In a StatefulWidget with device compass heading:
|
|
Widget buildQiblaArrow(double deviceHeading, double lat, double lng) {
|
|
final qibla = qiblaAngle(lat, lng);
|
|
final arrowRotation = (qibla - deviceHeading) * (pi / 180);
|
|
|
|
return Transform.rotate(
|
|
angle: arrowRotation,
|
|
child: const Icon(Icons.navigation, size: 48),
|
|
);
|
|
}
|
|
```
|