chore: added a drawable circle script to add a visual flare to the trail by making it look disconnected from the ball

Shared/Behaviours/DrawableCircle.cs

@@ -0,0 +1,34 @@
+using Engine.Core;
+using Engine.Systems.Graphics;
+
+namespace Pong.Behaviours;
+
+public class DrawableCircle : Behaviour2D, IDrawableTriangle, IPreDraw
+{
+    private const float CIRCLE_SEGMENT_COUNT = 32f;
+
+    private readonly Circle circle = new();
+    private Circle worldCircle = new();
+
+    public ColorRGBA Color { get; set; } = new ColorRGBA(255, 255, 255);
+
+    public void PreDraw() => UpdateWorldCircle();
+
+    public void Draw(ITriangleBatch triangleBatch)
+    {
+        for (int i = 0; i < CIRCLE_SEGMENT_COUNT; i++)
+        {
+            float iPi1 = i / CIRCLE_SEGMENT_COUNT * 2f * Math.Pi;
+            float iPi2 = (i + 1f).Mod(CIRCLE_SEGMENT_COUNT) / CIRCLE_SEGMENT_COUNT * 2f * Math.Pi;
+
+            Vector2D firstVertex = new Vector2D(Math.Sin(iPi1), Math.Cos(iPi1)) * worldCircle.Radius;
+            Vector2D secondVertex = new Vector2D(Math.Sin(iPi2), Math.Cos(iPi2)) * worldCircle.Radius;
+            triangleBatch.Draw(new(worldCircle.Center, worldCircle.Center + firstVertex, worldCircle.Center + secondVertex), Color);
+        }
+    }
+
+    protected void UpdateWorldCircle() => worldCircle = circle.Transform(Transform);
+
+    public DrawableCircle(Circle circle) { this.circle = circle; }
+    public DrawableCircle(Circle circle, ColorRGBA color) { this.circle = circle; Color = color; }
+}

Shared/PongUniverse.cs

@@ -81,6 +81,7 @@ public static class PongUniverse
             .BehaviourController.AddBehaviour<Transform2D>().SetTransform(position: new Vector2D(0, 0f), scale: new Vector2D(10f, 10f))
             .BehaviourController.AddBehaviour<DrawableColliderCircle>(new Circle(Vector2D.Zero, 1f))
             .BehaviourController.AddBehaviour<Ball>()
+            .BehaviourController.AddBehaviour<DrawableCircle>(new Circle(Vector2D.Zero, 2.5f), new ColorRGBA(35, 20, 35))
             .BehaviourController.AddBehaviour<BallTrail>()
             .BehaviourController.AddBehaviour<RigidBody2D>();