Think about it. If we want our game to pause, then we have to set some kind of flag that tells the game that we want it to take a break. We could set up a Boolean:
bool m_isPaused;
We would set m_isPaused to true if the game is paused, and set it to false if the game is running.
The problem with this approach is that there are a lot of special cases that we may run into in a real game. At any time the game might be:
Starting
Ending
Running
Paused
These are just some example of game states. A game state is a particular mode that requires special handling. As there can be so many states, we usually create a state manager to keep track of the state we are currently in.
The simplest version of a state manager begins with an enum that defines all of the game states. Open RoboRacer.cpp and add the following code just under the include statements:
enum GameState
{
GS_Running,
GS_Paused
};Then go to the variable declarations block and add the following line:
GameState...