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May 14, 2010 · While arguably OK in small examples given in elementary courses, global variables are strongly discouraged in real programs. So if you want to write correct, readable and maintainable code, stay away from global variables as much as possible.
In general, global variables should be used only when necessary, and they shouldn't be used to avoid using functions or classes. From TutorialsPoint, on Global vs. Local in Python: Variables that are defined inside a function body have a local scope, and those defined outside have a global scope.
If you keep your objects and scripts well documented and organized, and a global variable makes your life easier, then by all means, use a global to keep track of a player attribute. A controller object is also a good way to go and my personal recommendation.
Jun 2, 2021 · For example, in the game I’m currently working on I used a global variable for two tables. One which stores the current state of the player (AFK, escapee, hunter, etc) and one which stores the player name which allows me to access the player from the server.
Most games have a few “singleton” classes that often allow global access to major systems that are useful from many places. In this organization you may have a global accessor to a “player movement” class and that class could provide information about the player’s velocity.
Sep 9, 2019 · They can be quite useful in reflection with regards to entity-factories when using static initializers, or for singleton classes. However, for storing the objects which make up the "meat-and-potatoes" of your game, you should certainly plan on a different strategy other than global variables.
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May 30, 2020 · Global variables are variables which can be seen from all scopes of a script. It’s useful for when you want variables that can be seen in ALL parts of a script rather than just a function/loop etc. For example. testVar = 1. for i = 1, 10 do. testVar = testVar + 2. print(testVar)
