What is the process to implement a fullscreen toggle feature for players on PC in my game using Unity or Unreal Engine?

Implementing a Fullscreen Toggle in Unity

Using Screen Class

In Unity, you can easily toggle fullscreen mode using the Screen class. Here’s a simple way to implement this feature:

void ToggleFullscreen() { 
    Screen.fullScreen = !Screen.fullScreen; 
}

Attach this method to a button or key press event to allow players to switch between fullscreen and windowed mode.

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Using Player Preferences

To save the player’s preference for fullscreen mode, use the PlayerPrefs class:

void Start() { 
    bool isFullScreen = PlayerPrefs.GetInt("Fullscreen", 1) == 1; 
    Screen.fullScreen = isFullScreen; 
}

Additionally, set the value when changing fullscreen mode:

void ToggleFullscreen() { 
    Screen.fullScreen = !Screen.fullScreen; 
    PlayerPrefs.SetInt("Fullscreen", Screen.fullScreen ? 1 : 0); 
}

Implementing a Fullscreen Toggle in Unreal Engine

Using C++

In Unreal Engine, you can modify the fullscreen mode directly within a C++ class. Use the following code to toggle fullscreen mode:

void ToggleFullscreen() { 
    if (GEngine) { 
        GEngine->GameViewport->GetWindow()->SetWindowMode(EWindowMode::Fullscreen); 
    }
}

This method will change the window mode to fullscreen. Use EWindowMode::Windowed to revert to windowed mode.

Using Blueprints

You can also achieve this using Blueprints by using the Execute Console Command node with the command: "r.setres 1920x1080f" for fullscreen or "r.setres 800x600w" for windowed mode.

Best Practices

• Ensure that the resolution is supported by the monitor to avoid exceptions.
• Provide visual feedback to the player on resolution change.
• Store player preferences using a configuration file or in-game settings menu.