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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

Creating fixed frames per second

Earlier in the book we put in an SDL_Delay function to slow everything down and ensure that our objects weren't moving too fast. We will now expand upon that by making our game run at a fixed frame rate. Fixed frames per second (FPS) is not necessarily always a good option, especially when your game includes more advanced physics. It is worth bearing this in mind when you move on from this book and start developing your own games. Fixed FPS will, however, be fine for the small 2D games, which we will work towards in this book.

With that said, let's move on to the code:

  1. Open up main.cpp and we will create a few constant variables.

    const int FPS = 60;
const int DELAY_TIME = 1000.0f / FPS;

int main()
{

  2. Here we define how many frames per second we want our game to run at. A frame rate of 60 frames per second is a good starting point as this is essentially synced up to the refresh rate of most modern monitors and TVs. We can then divide this by the number of milliseconds...

CONTINUE READING
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Tech Concepts
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Programming languages
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SDL Game Development
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