User events in GameMaker are custom events that you can trigger manually in your code. They are useful for organizing and structuring your code, especially when you have specific actions that don't fit into the standard event types like
collision. In GameMaker, you have up to 16 user-defined events (from 0 to 15) that can be called for any instance.
To use a user event in GameMaker, follow these steps:
Define a User Event in an Object
Go to the object where you want to use the user event, right-click on the
Events tab, hover over
Add Event, then go to
Other and select one of the
User Event options (0-15).
Add Actions or Code to the User Event Just like with other events, you can now add actions or GML code that should execute whenever this event is triggered. This could be anything from handling input to managing custom game mechanics.
Trigger the User Event from Code
To trigger this event, use the
event_user() function within any GML script or event. For example, if you want to trigger
User Event 0, you would call it like so:
Here’s an example scenario where you might use a user event:
Imagine you have an object
obj_Enemy that has a special ability it can perform. Instead of clumping all the code for this ability into the
Step event or creating a custom script, you can put it in a user event for organization and readability. Any time you want the enemy to perform this action, you just call the user event associated with the ability.
Remember to only use user events when they make sense and help improve code clarity. There's no need to use them for everything, but they are very handy for specialized tasks that might clutter your main events.