servicepoint-tanks/TanksServer/GameLogic/MoveBullets.cs

namespace TanksServer.GameLogic;

internal sealed class MoveBullets(
    MapEntityManager entityManager,
    IOptions<TanksConfiguration> config
) : ITickStep
{
    public Task TickAsync(TimeSpan delta)
    {
        foreach (var bullet in entityManager.Bullets)
            MoveBullet(bullet, delta);

        return Task.CompletedTask;
    }

    private void MoveBullet(Bullet bullet, TimeSpan delta)
    {
        var speed = config.Value.BulletSpeed * delta.TotalSeconds;
        var angle = bullet.Rotation * 2 * Math.PI;
        bullet.Position = new FloatPosition(
            bullet.Position.X + Math.Sin(angle) * speed,
            bullet.Position.Y - Math.Cos(angle) * speed
        );
    }
}