chore: updated engine

Shared/Behaviours/BallBehaviour.cs

@@ -0,0 +1,81 @@
+using System;
+
+using Syntriax.Engine.Core;
+using Syntriax.Engine.Physics2D;
+using Syntriax.Engine.Physics2D.Abstract;
+
+namespace Pong.Behaviours;
+
+public class BallBehaviour : Behaviour2D
+{
+    public Vector2D StartDirection { get; private set; } = Vector2D.Zero;
+    public float Speed { get; set; } = 500f;
+    public float SpeedUpMultiplier { get; set; } = .0125f;
+
+    private readonly Random random = new();
+    private IRigidBody2D rigidBody = null!;
+
+    protected override void OnFirstActiveFrame()
+    {
+        if (!BehaviourController.TryGetBehaviour(out IRigidBody2D? foundRigidBody))
+            throw new Exception($"{nameof(IRigidBody2D)} is missing on {HierarchyObject.Name}.");
+        if (!BehaviourController.TryGetBehaviour(out ICollider2D? foundCollider))
+            throw new Exception($"{nameof(ICollider2D)} is missing on {HierarchyObject.Name}.");
+
+        foundCollider.OnCollisionDetected += OnCollisionDetected;
+
+        rigidBody = foundRigidBody;
+
+        if (HierarchyObject.GameManager.TryFindBehaviour(out PongManagerBehaviour? pongManager))
+        {
+            pongManager.OnReset += ResetBall;
+            pongManager.OnScored += ResetBall;
+            pongManager.OnFinished += DisableBall;
+        }
+    }
+
+    private void DisableBall(PongManagerBehaviour pongManager)
+    {
+        Transform.Position = Vector2D.Zero;
+        rigidBody.Velocity = Vector2D.Zero;
+    }
+
+    private void ResetBall(PongManagerBehaviour pongManager)
+    {
+        StateEnable.Enabled = true;
+        Transform.Position = Vector2D.Zero;
+        rigidBody.Velocity = GetRandomDirection() * Speed;
+    }
+
+    private Vector2D GetRandomDirection()
+    {
+        const float AllowedRadians = 45f * Syntriax.Engine.Core.Math.DegreeToRadian;
+        float rotation = (float)random.NextDouble() * 2f * AllowedRadians - AllowedRadians;
+        bool isBackwards = (random.Next() % 2) == 1;
+        return Vector2D.Right.Rotate(isBackwards ? rotation + Syntriax.Engine.Core.Math.PI : rotation);
+    }
+
+    protected override void OnUpdate()
+    {
+        if (rigidBody.Velocity.MagnitudeSquared <= 0.01f)
+            return;
+
+        Vector2D speedUp = rigidBody.Velocity.Normalized * GameManager.Time.DeltaTime;
+        rigidBody.Velocity += speedUp * SpeedUpMultiplier;
+    }
+
+    private void OnCollisionDetected(ICollider2D collider2D, CollisionDetectionInformation information)
+    {
+        if (Syntriax.Engine.Core.Math.Abs(information.Normal.Dot(Vector2D.Right)) > .25)
+            rigidBody.Velocity = information.Detected.Transform.Position.FromTo(information.Detector.Transform.Position).Normalized * rigidBody.Velocity.Magnitude;
+        else
+            rigidBody.Velocity = rigidBody.Velocity.Reflect(information.Normal);
+    }
+
+    public BallBehaviour() { }
+    public BallBehaviour(Vector2D startDirection, float speed)
+    {
+        StartDirection = Vector2D.Normalize(startDirection);
+        Speed = speed;
+    }
+}