Book Image

SDL Game Development

By : Shaun Mitchell
5 (1)
Book Image

SDL Game Development

5 (1)
By: Shaun Mitchell

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)
SDL Game Development
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Loading other states from an XML file


Our MainMenuState class now loads from an XML file. We need to make our other states do the same. We will only cover the code that has changed, so assume that everything else has remained the same when following through this section.

Loading the play state

We will start with PlayState.cpp and its onEnter function.

bool PlayState::onEnter()
{
  // parse the state
  StateParser stateParser;
  stateParser.parseState("test.xml", s_playID, &m_gameObjects, 
  &m_textureIDList);

  std::cout << "entering PlayState\n";
  return true;
}

We must also add the new texture clearing code that we had in MainMenuState to the onExit function.

// clear the texture manager
for(int i = 0; i < m_textureIDList.size(); i++)
{
  TheTextureManager::Instance()->
  clearFromTextureMap(m_textureIDList[i]);
}

These are the only alterations that we will need to do here but we must also update our XML file to have something to load in PlayState.

<PLAY>
<TEXTURES...