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Learning GDScript by Developing a Game with Godot 4

Learning GDScript by Developing a Game with Godot 4

By : Vanhove
4.8 (10)
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Learning GDScript by Developing a Game with Godot 4

Learning GDScript by Developing a Game with Godot 4

4.8 (10)
By: Vanhove

Overview of this book

In the digital landscape driven by interactive experiences, the demand for creative individuals with the skills to create captivating games has never been higher. Written by Sander Vanhove, a seasoned game developer with over 20 games to his credit, this book will serve as your entry point into game development, showing you how to leverage the powerful features of the open-source, versatile GDScript 2.0 to develop your ideas, from simple platformers to complex RPGs. Whether you're an aspiring game developer, a hobbyist seeking a creative outlet, or simply someone intrigued by the world of game programming, this book will guide you through the intricacies of the Godot 4 game engine. Starting with a primer on the fundamentals of programming, you’ll cover everything from data to logic, while familiarizing yourself with Godot’s built-in tools such as the physics engine, navigation, and cameras. As you progress, you’ll unlock deeper insights into more advanced tools that will take your programming to the next level. Aided by easy-to-follow step-by-step tutorials, examples, exercises, and experiments, you’ll seamlessly integrate this newfound knowledge to create a Vampire Survivor-like game from scratch. By the end of this book, you’ll have become proficient in leveraging the Godot 4 game engine to bring your gaming visions to life.
Table of Contents (22 chapters)
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1
Part 1:Learning How to Program
7
Part 2: Making a Game in Godot Engine
14
Part 3: Deepening Our Knowledge

Null

Lastly, let me introduce you to a new data type: null. This type only has one value: null. It carries no information, cannot be changed, and has no functions you can call. So, what is it good for? It is a variable’s value when we don’t give it one from the start. Try out the following snippet of code:

var inventory
print(inventory)

You’ll see that it will print out null. Sometimes, you’ll want to do this to ensure a variable exists but don’t want to initiate it with a value yet. In the filing cabinet metaphor from Chapter 2, this would mean that we reserved a drawer and a name for the variable but haven’t filled it with data yet.

Using a variable in any way while it is null will result in an error. For example, the next two operations will result in an error while running the code:

var inventory
inventory.append("Boots")
var number_of_lives
number_of_lives -= 2

So, it is best to check whether a variable is null if...

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