public void RegisterServices(ServiceCollection services)
{
services.RegisterTypeFactory <SpriteBatch>(p => new SpriteBatch(p.GetService <GraphicsDevice>()));
services.RegisterTypeFactory <Camera2D>(p => new Camera2D());
services.RegisterScoped <SpriteBatch>();
services.RegisterTransient(Guppy.Constants.ServiceConfigurationKeys.TransientSpritebatch);
services.RegisterScoped <Camera2D>();
services.RegisterTransient(Guppy.Constants.ServiceConfigurationKeys.TransientCamera);
AssemblyHelper.AddAssembly(typeof(GraphicsDevice).Assembly);
AssemblyHelper.Types.GetTypesAssignableFrom <IVertexType>().Where(t => t.IsValueType).ForEach(vt =>
{
var primitiveBatchType = typeof(PrimitiveBatch <>).MakeGenericType(vt);
services.RegisterTypeFactory(primitiveBatchType, (p, t) => ActivatorUtilities.CreateInstance(p, t));
services.RegisterSingleton(ServiceConfigurationKey.From(type: primitiveBatchType));
});
}