this post was submitted on 06 Jul 2025
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Definitely ask yourself whether they really need to be, but using a global variable makes sense if it's something that's going to be used by a large number of different parts of the program.
For example, the game I'm developing uses a variable called
control_modeto determine how to handle the player's button presses. Anything that can be affected by those button presses (the player avatar, the menus, etc.) needs to be able to know the game's current control mode to be able to handle user input, so e.g. the player character shouldn't be able to move during cutscenes or when the game is paused. Since so many different parts of the program need to readcontrol_mode, I made it global, but I only change it from a dedicated control manager.