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  • Book Overview & Buying SDL Game Development
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SDL Game Development

SDL Game Development

By : Shaun Mitchell
2.9 (37)
Buy this Book
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SDL Game Development

SDL Game Development

2.9 (37)
By: Shaun Mitchell
Buy this Book

Overview of this book

SDL 2.0 is the latest release of the popular Simple DirectMedia Layer API, which is designed to make life easier for C++ developers, allowing you simple low-level access to various multiplatform audio, graphics, and input devices.SDL Game Development guides you through creating your first 2D game using SDL and C++. It takes a clear and practical approach to SDL game development, ensuring that the focus remains on creating awesome games.Starting with the installation and setup of SDL, you will quickly become familiar with useful SDL features, covering sprites, state management, and OOP, leading to a reusable framework that is extendable for your own games. SDL Game Development culminates in the development of two exciting action games that utilize the created framework along with tips to improve the framework.
Table of Contents (16 chapters)
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SDL Game Development
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SDL Game Development
Credits
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Credits
About the Author
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About the Author
About the Reviewers
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About the Reviewers
www.PacktPub.com
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www.PacktPub.com
Preface
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Preface
Lock Free Chapter
1
Getting Started with SDL
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Getting Started with SDL
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Why use SDL?
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Setting up SDL in Visual C++ Express 2010
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Hello SDL
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What makes up a game
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The Game class
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Summary
2
Drawing in SDL
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Drawing in SDL
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Basic SDL drawing
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Source and destination rectangles
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Installing SDL_image
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Tying it into the framework
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Summary
3
Working with Game Objects
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Working with Game Objects
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Using inheritance
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Implementing polymorphism
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Using abstract base classes
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Should we always use inheritance?
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Putting it all together
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Summary
4
Exploring Movement and Input Handling
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Exploring Movement and Input Handling
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Setting up game objects for movement
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Creating fixed frames per second
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Input handling
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Summary
5
Handling Game States
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Handling Game States
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A simple way for switching states
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Implementing finite state machines
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Implementing menu states
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Summary
6
Data-driven Design
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Data-driven Design
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Loading XML files
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Implementing Object Factories
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Fitting the factory into the framework
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Parsing states from an XML file
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Loading the menu state from an XML file
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Loading other states from an XML file
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Summary
7
Creating and Displaying Tile Maps
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Creating and Displaying Tile Maps
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What is a tile map?
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Getting familiar with the Tiled application
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Parsing and drawing a tile map
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Scrolling a tile map
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Parsing object layers
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Summary
8
Creating Alien Attack
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Creating Alien Attack
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Using the SDL_mixer extension for sound
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Setting up the basic game objects
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Handling bullets
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Dealing with collisions
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Possible improvements
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Summary
9
Creating Conan the Caveman
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Creating Conan the Caveman
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Setting up the basic game objects
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Possible additions
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Summary
1
Index
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Index

Implementing Object Factories

We are now armed with a little XML knowledge but before we move forward, we are going to take a look at Object Factories. An object factory is a class that is tasked with the creation of our objects. Essentially, we tell the factory the object we would like it to create and it goes ahead and creates a new instance of that object and then returns it. We can start by looking at a rudimentary implementation:

GameObject* GameObjectFactory::createGameObject(ID id)
{
  switch(id)
  {
    case "PLAYER":
      return new Player();
    break;
    
    case "ENEMY":
      return new Enemy();
    break;
    
    // lots more object types 
  }
}

This function is very simple. We pass in an ID for the object and the factory uses a big switch statement to look it up and return the correct object. Not a terrible solution but also not a particularly good one, as the factory will need to know about each type it needs to create and maintaining the switch statement for many different...

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Programming languages
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SDL Game Development
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