6. Boost Your Code Using Multithreading

Adding multithreading to our games

We will now modify our Gravitris to paralyze the physics calculations from the rest of the program. We will need to change only two files: Game.hpp and Game.cpp.

In the header file, we will not only need to add the required header, but also change the prototype of the update_physics() function and finally add some attributes to the class. So here are the different steps to follow:

Add #include <SFML/System.hpp>, this will allow us to have access to all the classes needed.
Then, change the following code snippet:
```
void updatePhysics(const sf::Time& deltaTime,const sf::Time& timePerFrame);
```
to:
```
void updatePhysics();
```
The reason is that a thread is not able to pass any parameters to its wrapped function so we will use another solution: member variables.
Add the following variables into the Game class as private:
```
sf::Thread _physicsThread;
sf::Mutex _mutex;
bool _isRunning;
int _physicsFramePerSeconds;
```
All these variables will be used by the physics thread...

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SFML Blueprints

By : Barbier

SFML Blueprints

By: Barbier

Overview of this book

Adding multithreading to our games

SFML Blueprints

By : Barbier

SFML Blueprints

By: Barbier

Overview of this book

Adding multithreading to our games

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