#### Overview of this book

Over the years, the Learning C# by Developing Games with Unity series has established itself as a popular choice for getting up to speed with C#, a powerful and versatile programming language that can be applied in a wide array of application areas. This book presents a clear path for learning C# programming from the ground up without complex jargon or unclear programming logic, all while building a simple game with Unity. This fifth edition has been updated to introduce modern C# features with the latest version of the Unity game engine, and a new chapter has been added on intermediate collection types. Starting with the basics of software programming and the C# language, you’ll learn the core concepts of programming in C#, including variables, classes, and object-oriented programming. Once you’ve got to grips with C# programming, you’ll enter the world of Unity game development and discover how you can create C# scripts for simple game mechanics. Throughout the book, you’ll gain hands-on experience with programming best practices to help you take your Unity and C# skills to the next level. By the end of this book, you’ll be able to leverage the C# language to build your own real-world Unity game development projects.
Preface
Free Chapter
The Building Blocks of Programming
Control Flow and Collection Types
Revisiting Types, Methods, and Classes
Introducing Stacks, Queues, and HashSets
The Journey Continues
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# Understanding vectors

Now that we have a player capsule and camera set up, we can start looking at how to move and rotate a GameObject using its Transform component. The Translate and Rotate methods are part of the Transform class that Unity provides, and each needs a vector parameter to perform its given function.

In Unity, vectors are used to hold position and direction data in 2D and 3D spaces, which is why they come in two varieties—Vector2 and Vector3. These can be used like any other variable type we've seen; they just hold different information. Since our game is in 3D, we'll be using Vector3 objects, which means we'll need to construct them using x, y, and z values. For 2D vectors, only the x and y positions are required. Remember, the most up-to-date orientation in your 3D scene will be displayed in the upper-right graphic that we discussed in the previous chapter, Chapter 6Getting Your Hands Dirty with Unity: