feat: adjusted flipper anchor

packages/pinball_components/lib/src/components/flipper.dart

@@ -159,8 +159,9 @@ class _FlipperAnchor extends JointAnchor {
     required Flipper flipper,
   }) {
     initialPosition = Vector2(
-      flipper.body.position.x + ((Flipper.size.x * flipper.side.direction) / 2),
+      (Flipper.size.x * flipper.side.direction) / 2 -
-      flipper.body.position.y,
+          (1.65 * flipper.side.direction),
+      0.15,
     );
   }
 }
@@ -178,7 +179,7 @@ class _FlipperAnchorRevoluteJointDef extends RevoluteJointDef {
     initialize(
       flipper.body,
       anchor.body,
-      anchor.body.position,
+      flipper.body.position + anchor.body.position,
     );
   }
 

packages/pinball_components/lib/src/components/joint_anchor.dart

@@ -12,7 +12,7 @@ import 'package:pinball_components/pinball_components.dart';
 /// initialize(
 ///   dynamicBody.body,
 ///   anchor.body,
-///   anchor.body.position,
+///   dynabmicBody.body + anchor.body.position,
 /// );
 /// ```
 /// {@endtemplate}

packages/pinball_components/sandbox/lib/common/trace.dart

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flame/components.dart';
 import 'package:flame_forge2d/flame_forge2d.dart';
 import 'package:flutter/material.dart';
+import 'package:pinball_components/pinball_components.dart';
 
 extension BodyTrace on BodyComponent {
   void trace({Color color = const Color(0xFFFF0000)}) {
@@ -13,6 +14,12 @@ extension BodyTrace on BodyComponent {
       mounted.whenComplete(() {
         final sprite = children.whereType<SpriteComponent>().first;
         sprite.paint.color = sprite.paint.color.withOpacity(0.5);
+
+        descendants().whereType<JointAnchor>().forEach((anchor) {
+          final fixtureDef = FixtureDef(CircleShape()..radius = 0.5);
+          anchor.body.createFixture(fixtureDef);
+          anchor.renderBody = true;
+        });
       }),
     );
   }

packages/pinball_components/sandbox/lib/stories/flipper/basic_flipper_game.dart

@@ -1,4 +1,5 @@
 import 'package:flame/input.dart';
+import 'package:flame_forge2d/flame_forge2d.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:pinball_components/pinball_components.dart';