first commit

2026-10-04 00:19:45 +03:00
commit 05f1c9ec6b
93 changed files with 10782 additions and 0 deletions
@@ -0,0 +1,46 @@
+import 'dart:math';
+
+/// أدوات حساب المسافات والاتجاهات الجغرافية
+class GeoUtils {
+  static const double _earthRadiusMeters = 6371000;
+
+  /// Haversine formula - حساب المسافة بين نقطتين
+  static double haversineDistance(
+    double lat1, double lng1,
+    double lat2, double lng2,
+  ) {
+    final dLat = _toRad(lat2 - lat1);
+    final dLng = _toRad(lng2 - lng1);
+    final a = sin(dLat / 2) * sin(dLat / 2) +
+        cos(_toRad(lat1)) * cos(_toRad(lat2)) *
+        sin(dLng / 2) * sin(dLng / 2);
+    final c = 2 * atan2(sqrt(a), sqrt(1 - a));
+    return _earthRadiusMeters * c;
+  }
+
+  /// Calculate bearing between two points (degrees from north)
+  static double bearing(
+    double lat1, double lng1,
+    double lat2, double lng2,
+  ) {
+    final dLng = _toRad(lng2 - lng1);
+    final y = sin(dLng) * cos(_toRad(lat2));
+    final x = cos(_toRad(lat1)) * sin(_toRad(lat2)) -
+        sin(_toRad(lat1)) * cos(_toRad(lat2)) * cos(dLng);
+    return (_toDeg(atan2(y, x)) + 360) % 360;
+  }
+
+  /// Calculate speed between two points (m/s)
+  static double speed(
+    double lat1, double lng1, DateTime t1,
+    double lat2, double lng2, DateTime t2,
+  ) {
+    final dist = haversineDistance(lat1, lng1, lat2, lng2);
+    final seconds = t2.difference(t1).inMilliseconds / 1000.0;
+    if (seconds <= 0) return 0;
+    return dist / seconds;
+  }
+
+  static double _toRad(double deg) => deg * pi / 180;
+  static double _toDeg(double rad) => rad * 180 / pi;
+}