# Book Review: DirectX 11.1 Game Programming
"DirectX 11.1 Game Programming" is a new book published by Packt Publishing, written by Pooya Eimandar. It introduces new features of DirectX 11.1 and some other technologies available for game developers when writing Metro-style apps for Windows 8. The book uses C++/CX - a new language based on C++, with the syntax somewhat similar to C++/CLI (the language is extended by managed pointer operator ^). But while C++/CLI is a .NET language (like C#), C++/CX is compiled to native code and the ^ pointer is just a convenient syntax for reference-counting smart pointer to a COM object. Math is done with DirectXMath library (the successor of XNA Math).
Each of the chapters describes several loosely coupled topics. Their flattened list looks like this:
I have mixed feelings about this book. Contrary to what title suggests and what the author claims inside ("By the end of this chapter, we are going to have a multithreaded game engine"), you obviously cannot learn game programming by reading just 146 pages. Especially as the book covers so many different topics. It looks like the author wanted to include everything what's fresh and sexy in Microsoft Windows 8 API-s. As a result, each example is kind of "Hello World" - the simplest possible application of the described technology.
But at the same time, the book is also not teaching 3D games programming from the start. It explains some selected basic concepts in more details (e.g. describes what vertex shader does, shows how rotation matrices look like, how to use constant, vertex and index buffer or shows a diagram of the graphics pipeline - 3 times actually :) but generally you should already know C++ and preferably DirectX 10/11 to make use of the knowledge from this book. It is more like an overview of "What's New" in Windows 8, DirectX 11-11.1 and new Visual Studio.
I think the biggest value of this book is the attached source code. Each chapter is accompanied by a complete C++/CX project that shows an application of the described technology and the text in the book is an overview of this code. So if you already know some game programming in C++ and DirectX 10/11, this book can be a good tutorial which will help you to start using latest Microsoft technologies and develop Windows 8 Metro-style games. Preface says "This book will help you easily create your own framework and build your first game for Metro Style all by yourself in order to publish it on the Windows Store." and that is true.
But whether this is worth doing, that's another question. Surely you can use DX 11 on 9- or 10-compatible hardware, using Feature Level, but you cannot use most of what this book describes below Windows 8, and many of these things also without buying Visual Studio Professional or higher. According to Steam Hardware & Software Survey: Auguest 2013, while 64.78% of gamers already have DirectX 11 capable system and GPU, only 15.41% of them have Windows 8 installed (and it's already a year since its release).
Now it's time for a contest. Packt has proposed to offer 3 digital copies of the book. All you need to do is head on over to the book page, look through the product description of the book and then drop a line via the comments below this post to let us know what interests you the most about this book. 3 best comments win!!! Deadline: The contest will close in 1 weeks time. Winners will be contacted by email, so be sure to use your real email address when you comment.