update

CHANGELOG.md

@@ -24,3 +24,4 @@
 # 1.0.4
 
 * Add scale change callback
+* Optimize performance

example/lib/main.dart

@@ -317,14 +317,20 @@ class _MyHomePageState extends State<MyHomePage> {
           },
           child: Text(_json == null ? 'save' : 'load'),
         ),
+        ElevatedButton(
+          onPressed: () {
+            _controller.scale = 1;
+          },
+          child: const Text('reset'),
+        ),
         Slider(
           value: _scale,
           min: _controller.minScale,
           max: _controller.maxScale,
           onChanged: (value) {
             _controller.scale = value;
           },
-        )
+        ),
       ],
     );
   }

example/pubspec.lock

@@ -5,48 +5,55 @@ packages:
     dependency: transitive
     description:
       name: async
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.9.0"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.2.1"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
+      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.16.0"
+    version: "1.17.1"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
+      sha256: e35129dc44c9118cee2a5603506d823bab99c68393879edb440e0090d07586be
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.0.5"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.3.1"
@@ -61,11 +68,12 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "1.0.3"
+    version: "1.0.4"
   flutter_lints:
     dependency: "direct dev"
     description:
       name: flutter_lints
+      sha256: "2118df84ef0c3ca93f96123a616ae8540879991b8b57af2f81b76a7ada49b2a4"
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.2"
@@ -74,41 +82,54 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.6.7"
   lints:
     dependency: transitive
     description:
       name: lints
+      sha256: "5e4a9cd06d447758280a8ac2405101e0e2094d2a1dbdd3756aec3fe7775ba593"
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
+      sha256: "6501fbd55da300384b768785b83e5ce66991266cec21af89ab9ae7f5ce1c4cbb"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.12.12"
+    version: "0.12.15"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
+      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.1.5"
+    version: "0.2.0"
   meta:
     dependency: transitive
     description:
       name: meta
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.8.0"
+    version: "1.9.1"
   path:
     dependency: transitive
     description:
       name: path
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.8.2"
+    version: "1.8.3"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -118,51 +139,58 @@ packages:
     dependency: transitive
     description:
       name: source_span
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.9.0"
+    version: "1.9.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.1.1"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
+      sha256: eb6ac1540b26de412b3403a163d919ba86f6a973fe6cc50ae3541b80092fdcfb
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.4.12"
+    version: "0.5.1"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
       url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.4"
 sdks:
-  dart: ">=2.18.6 <3.0.0"
+  dart: ">=3.0.0-0 <4.0.0"
   flutter: ">=1.17.0"

lib/model/edge.dart

@@ -21,6 +21,10 @@ class Edge {
     }
   }
 
+  double get rawAngle {
+    return (a.position - b.position).angleToSigned(Vector2(1, 0));
+  }
+
   /// Hooke's law calculates the elastic force
   double calculateAttractionForce({required double k, required double length}) {
     final distance = this.distance;