feat(tactical): sovereign military suite with 100% real satellite DEM intervisibility, viewshed 360, offline engines, and entitlements

2026-08-22 15:11:16 +03:00
parent 4a7859f4c2
commit c10fd2396c
74 changed files with 14866 additions and 4001 deletions
@@ -113,4 +113,22 @@ class ResectionCalculator {
    final c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a));
    return earthRadiusKm * c;
  }
+
+  /// Great-circle distance between two points in meters.
+  static double haversineDistance(double lat1, double lon1, double lat2, double lon2) {
+    return haversineDistanceKm(lat1, lon1, lat2, lon2) * 1000.0;
+  }
+
+  /// Calculate forward azimuth/bearing in degrees (0-360°) from point 1 to point 2.
+  static double calculateBearing(double lat1, double lon1, double lat2, double lon2) {
+    final dLon = (lon2 - lon1) * (math.pi / 180.0);
+    final lat1Rad = lat1 * (math.pi / 180.0);
+    final lat2Rad = lat2 * (math.pi / 180.0);
+
+    final y = math.sin(dLon) * math.cos(lat2Rad);
+    final x = math.cos(lat1Rad) * math.sin(lat2Rad) -
+        math.sin(lat1Rad) * math.cos(lat2Rad) * math.cos(dLon);
+    final bearingRad = math.atan2(y, x);
+    return (bearingRad * (180.0 / math.pi) + 360.0) % 360.0;
+  }
 }