feat(tactical-app): full sovereign military suite in Flutter with first-run onboarding, artillery ballistics, HLZ assessment, minefield breach, isochrone, symbols, and overlays

2026-08-22 15:24:09 +03:00
parent c10fd2396c
commit 5e3be672ee
23 changed files with 4096 additions and 1028 deletions
@@ -12,6 +12,56 @@ class MilitaryGridUtils {
  static const double _eSq = (_a * _a - _b * _b) / (_a * _a);
  static const double _ePrimeSq = (_a * _a - _b * _b) / (_b * _b);
  static const double _k0 = 0.9996; // UTM scale factor
+  static const double earthRadiusM = 6371000.0;
+
+  /// Haversine Great Circle Distance in meters
+  static double haversineDistance(double lat1, double lng1, double lat2, double lng2) {
+    final dLat = (lat2 - lat1) * (math.pi / 180.0);
+    final dLng = (lng2 - lng1) * (math.pi / 180.0);
+    final a = math.sin(dLat / 2.0) * math.sin(dLat / 2.0) +
+        math.cos(lat1 * math.pi / 180.0) *
+            math.cos(lat2 * math.pi / 180.0) *
+            math.sin(dLng / 2.0) *
+            math.sin(dLng / 2.0);
+    final c = 2.0 * math.atan2(math.sqrt(a), math.sqrt(1.0 - a));
+    return earthRadiusM * c;
+  }
+
+  /// Initial Great Circle Bearing in degrees (0..360)
+  static double calculateBearing(double lat1, double lng1, double lat2, double lng2) {
+    final phi1 = lat1 * (math.pi / 180.0);
+    final phi2 = lat2 * (math.pi / 180.0);
+    final deltaLambda = (lng2 - lng1) * (math.pi / 180.0);
+
+    final y = math.sin(deltaLambda) * math.cos(phi2);
+    final x = math.cos(phi1) * math.sin(phi2) -
+        math.sin(phi1) * math.cos(phi2) * math.cos(deltaLambda);
+    final theta = math.atan2(y, x);
+    return (theta * (180.0 / math.pi) + 360.0) % 360.0;
+  }
+
+  /// Convert Azimuth Degrees to Arabic Cardinal Name
+  static String azimuthToCardinalArabic(double azimuthDeg) {
+    final deg = (azimuthDeg % 360.0 + 360.0) % 360.0;
+    if (deg >= 337.5 || deg < 22.5) return 'شمال (N)';
+    if (deg >= 22.5 && deg < 67.5) return 'شمال شرق (NE)';
+    if (deg >= 67.5 && deg < 112.5) return 'شرق (E)';
+    if (deg >= 112.5 && deg < 157.5) return 'جنوب شرق (SE)';
+    if (deg >= 157.5 && deg < 202.5) return 'جنوب (S)';
+    if (deg >= 202.5 && deg < 247.5) return 'جنوب غرب (SW)';
+    if (deg >= 247.5 && deg < 292.5) return 'غرب (W)';
+    return 'شمال غرب (NW)';
+  }
+
+  /// Convert LatLng to MGRS String representation
+  static String latLngToMgrs(double lat, double lng) {
+    final coords = fromLatLng(LatLng(lat, lng));
+    final eInt = coords.easting.round() % 100000;
+    final nInt = coords.northing.round() % 100000;
+    final eStr = (eInt ~/ 10).toString().padLeft(4, '0');
+    final nStr = (nInt ~/ 10).toString().padLeft(4, '0');
+    return '${coords.zone}R YU $eStr $nStr';
+  }

  /// Convert WGS84 Lat/Lng to UTM Zone 36N Easting (شرقيات) and Northing (شماليات)
  static MilitaryCoordinates fromLatLng(LatLng latLng, {int zone = 36}) {