From 5883f3eb42d98828be456067a0b42bf61c158f57 Mon Sep 17 00:00:00 2001
From: alestiago <dev@alestiago.com>
Date: Mon, 14 Mar 2022 11:07:08 +0000
Subject: [PATCH] feat: removed friction from SlingShot

---
 lib/game/components/sling_shot.dart       |  7 +++++--
 test/game/components/sling_shot_test.dart | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/lib/game/components/sling_shot.dart b/lib/game/components/sling_shot.dart
index cca72622..2e77b69a 100644
--- a/lib/game/components/sling_shot.dart
+++ b/lib/game/components/sling_shot.dart
@@ -49,7 +49,8 @@ class SlingShot extends BodyComponent {
     }
 
     final triangle = PolygonShape()..set(triangleVertices);
-    fixtures.add(FixtureDef(triangle));
+    final triangleFixture = FixtureDef(triangle)..friction = 0;
+    fixtures.add(triangleFixture);
 
     final kicker = EdgeShape()
       ..set(
@@ -57,7 +58,9 @@ class SlingShot extends BodyComponent {
         triangleVertices.last,
       );
     // TODO(alestiago): Play with restitution value once game is bundled.
-    final kickerFixtureDef = FixtureDef(kicker)..restitution = 20.0;
+    final kickerFixtureDef = FixtureDef(kicker)
+      ..restitution = 20.0
+      ..friction = 0;
     fixtures.add(kickerFixtureDef);
 
     return fixtures;
diff --git a/test/game/components/sling_shot_test.dart b/test/game/components/sling_shot_test.dart
index 1df704b4..d617b3e2 100644
--- a/test/game/components/sling_shot_test.dart
+++ b/test/game/components/sling_shot_test.dart
@@ -66,6 +66,17 @@ void main() {
           expect((fixture.shape as PolygonShape).vertices.length, equals(3));
         },
       );
+
+      flameTester.test(
+        'has no friction',
+        (game) async {
+          final slingShot = SlingShot(position: Vector2.zero());
+          await game.ensureAdd(slingShot);
+
+          final fixture = slingShot.body.fixtures[0];
+          expect(fixture.friction, equals(0));
+        },
+      );
     });
 
     group('second fixture', () {
@@ -100,6 +111,17 @@ void main() {
           expect(fixture.restitution, greaterThan(0));
         },
       );
+
+      flameTester.test(
+        'has no friction',
+        (game) async {
+          final slingShot = SlingShot(position: Vector2.zero());
+          await game.ensureAdd(slingShot);
+
+          final fixture = slingShot.body.fixtures[1];
+          expect(fixture.friction, equals(0));
+        },
+      );
     });
   });
 }