This version uses latlong2 for latitude and longitude calculation

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "editor.minimap.maxColumn": 80
+}

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.0.0
+
+* BREAKING CHANGE: This version uses latlong2 for latitude and longitude calculation. The goal is to make it compatible with flutter_map
+
 ## 2.0.1
 
 * Update Dart DSK version up to 2.17.0

README.md

@@ -19,7 +19,7 @@ In your dart/flutter project add the dependency:
 ```
  dependencies:
    ...
-   maps_toolkit: ^2.0.1
+   maps_toolkit: ^3.0.0
 ```
 
 A simple usage example:

example/maps_toolkit_example.dart

@@ -1,3 +1,4 @@
+import 'package:latlong2/latlong.dart';
 import 'package:maps_toolkit/maps_toolkit.dart';
 
 void main() {

lib/maps_toolkit.dart

@@ -1,6 +1,6 @@
 /// Maps toolkit (port from android-maps-utils library)
 library maps_toolkit;
 
-export 'src/latlng.dart';
+// export 'src/latlng_.dart';
 export 'src/polygon_util.dart';
 export 'src/spherical_util.dart';

lib/src/kalman_filter.dart

@@ -1,6 +1,8 @@
 import 'dart:math';
 
-import 'latlng.dart';
+// import 'latlng.dart';
+import 'package:latlong2/latlong.dart';
+
 import 'location.dart';
 import 'spherical_util.dart';
 

lib/src/latlng_X.dart

@@ -0,0 +1,32 @@
+// class LatLng_X {
+//   final double latitude;
+//   final double longitude;
+
+//   LatLng_(this.latitude, this.longitude);
+
+//   factory LatLng_.fromMap(Map<String, double> dataMap) =>
+//       LatLng_(dataMap['latitude']!, dataMap['longitude']!);
+
+//   @override
+//   // ignore: type_annotate_public_apis
+//   bool operator ==(other) {
+//     if (other is LatLng_) {
+//       return other.latitude == latitude && other.longitude == longitude;
+//     }
+
+//     return false;
+//   }
+
+//   @override
+//   int get hashCode =>
+//       _combine(_combine(0, latitude.hashCode), longitude.hashCode);
+
+//   int _combine(int hash, int value) {
+//     hash = 0x1fffffff & (hash + value);
+//     hash = 0x1fffffff & (hash + ((0x0007ffff & hash) << 10));
+//     return hash ^ (hash >> 6);
+//   }
+
+//   @override
+//   String toString() => 'Lat: $latitude, Lng: $longitude';
+// }

lib/src/location.dart

@@ -1,4 +1,6 @@
-import 'latlng.dart';
+import 'package:latlong2/latlong.dart';
+
+// import 'latlng_.dart';
 
 class Location {
   final LatLng latlng;

lib/src/polygon_util.dart

@@ -1,9 +1,10 @@
 import 'dart:collection';
 import 'dart:math';
 
+import 'package:latlong2/latlong.dart';
 import 'package:maps_toolkit/src/spherical_util.dart';
 
-import 'latlng.dart';
+// import 'latlng_.dart';
 import 'math_util.dart';
 
 /// Port of PolyUtil from android-maps-utils (https://github.com/googlemaps/android-maps-utils)

lib/src/spherical_util.dart

@@ -1,6 +1,8 @@
 import 'dart:math';
 
-import 'latlng.dart';
+import 'package:latlong2/latlong.dart';
+
+// import 'latlng_.dart';
 import 'math_util.dart';
 
 /// Port of SphericalUtil from android-maps-utils (https://github.com/googlemaps/android-maps-utils)

pubspec.yaml

@@ -1,12 +1,13 @@
 name: maps_toolkit
 description: Maps toolkit - geo-measurements utils - area of polygon, distance between point, heading and offset between points (port of SphericalUtil, PolyUtil from `android-maps-utils`).
-version: 2.0.1
+version: 3.0.0
 homepage: https://github.com/kb0/maps_toolkit/
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: '>=2.17.0 <3.0.0'
 
-dependencies:
+dependencies: 
+  latlong2: ^0.8.1
 
 dev_dependencies:
   lints: ^2.0.0

test/maps_toolkit_test.dart

@@ -1,5 +1,6 @@
 import 'dart:math';
 
+import 'package:latlong2/latlong.dart';
 import 'package:maps_toolkit/maps_toolkit.dart';
 import 'package:maps_toolkit/src/math_util.dart';
 import 'package:test/test.dart';

test/polygon_util_test.dart

@@ -1,3 +1,4 @@
+import 'package:latlong2/latlong.dart';
 import 'package:maps_toolkit/maps_toolkit.dart';
 import 'package:test/test.dart';
 
@@ -111,8 +112,13 @@ void main() {
         PolygonUtil.containsLocation(LatLng(1, 1), [], false), equals(false));
   });
 
+  // test('containsLocation without point', () {
+  //   expect(PolygonUtil.containsLocation(LatLng(99, 99), polygon, true),
+  //       equals(false));
+  // });
+
   test('containsLocation without point', () {
-    expect(PolygonUtil.containsLocation(LatLng(99, 99), polygon, true),
+    expect(PolygonUtil.containsLocation(LatLng(90, 90), polygon, true),
         equals(false));
   });
 
@@ -240,7 +246,8 @@ void main() {
         makeList([-45, -180, -45, -small]),
         makeList([
           -45,
-          180 + small,
+          //180 + small,
+          180, // MAX: 180 degree
           -45,
           180 - small,
           -45 - small,