Engine-Pong/Game/Behaviours/MovementBallBehaviour.cs

using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;
using Syntriax.Engine.Core;
using Syntriax.Engine.Input;

namespace Pong.Behaviours;

public class MovementBallBehaviour(Vector2 StartDirection, PlayAreaBehaviour PlayAreaBehaviour, float Speed) : BehaviourOverride
{
    public Vector2 StartDirection { get; private set; } = StartDirection;
    public PlayAreaBehaviour PlayAreaBehaviour { get; } = PlayAreaBehaviour;
    public float Speed { get; set; } = Speed;

    protected override void OnInitialize() => StartDirection.Normalize();

    protected override void OnUpdate(GameTime time)
    {
        GameObject.Transform.Position += StartDirection * (time.ElapsedGameTime.Nanoseconds * .001f) * Speed;

        float absY = MathF.Abs(GameObject.Transform.Position.Y);
        float differenceY = absY - PlayAreaBehaviour.PlayArea.Y * 0.5f;
        if (differenceY > 0f)
        {
            if (GameObject.Transform.Position.Y > 0f)
                GameObject.Transform.Position -= Vector2.UnitY * differenceY * 2f;
            else
                GameObject.Transform.Position += Vector2.UnitY * differenceY * 2f;

            StartDirection = new(StartDirection.X, -StartDirection.Y);
        }

        float absX = MathF.Abs(GameObject.Transform.Position.X);
        float differenceX = absX - PlayAreaBehaviour.PlayArea.X * 0.5f;
        if (differenceX > 0f)
        {
            if (GameObject.Transform.Position.X > 0f)
                GameObject.Transform.Position -= Vector2.UnitX * differenceX * 2f;
            else
                GameObject.Transform.Position += Vector2.UnitX * differenceX * 2f;

            StartDirection = new(-StartDirection.X, StartDirection.Y);
        }
    }
}