Apologies that this question may be similar to others that keep coming up - I’ve looked at several posts and tutorials, but none of them were quite don’t what I’m looking for and context if everything with the UE4 blueprint interface.
I have 2 blueprints and want one of them to check for a var change and then do something based upon it. In this example, play an explosion and remove a door from the world. Script A waits for the player to run through a gate (with a box collision) a number of times, before changing a var that Script B that is supposed notice and then trigger the particle FX and destroy itself.
The part I’m struggling with is the script-to-script comms. I’ve looked at things on referencing and casting, but I’m still not getting it.
Script A - When health var decrements to 0 set the destroy boolean to true
You shouldn’t work with variables to do this, or at least, not just with them. There are some methods to do this, I would use full [Observer Pattern][1], but there are simpler ways, for example:
ScriptA
Create an Event Dispatcher and a Health variable = “number of times”.
Create a function “AddHealth” that receives a Integer parameter and sums it to Health. After the operation, call the event dispatcher.
Add a ScriptA property, check it as “Instance Editable”. Place this actor in the world and in the details panel, click ScriptA property and select desired ScriptA object.
ScriptB
Should also has a ScriptA reference var like Gate.
Bind to ScriptA event dispatcher.
Check if Health is <= 0, and blows up
I agree with the above. I have an entire tutorial series that is beginner friendly which you may find helpful. The first video is all about casting, how and when to use it. Videos 24-26 go over Interfaces, Creating References and Event Dispatchers. All very useful things for what you are trying to accomplish.
This is also a tutorial explaining overlap events in detail if you decide to go that route may also be helpful.
