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On-Kill/On-Hit effects: Signal train vs reference passing (self.godot)

submitted 8 months ago by Jozzo to c/[email protected]

7 comments fedilink hide all child comments

Wanted some opinions on ways to set up triggering "on-kill" effects. In short: The player can have abilities that trigger effects whenever they shoot and kill an enemy. I'm also looking to extend abilities to enemies as well, so can't just hardcode a player reference.

Currently I'm doing it like this:

Enemy signals that it died -> the bullet receives this and signals that it killed Enemy -> the player's weapon receives this and signals that it's bullet killed Enemy -> the player receives this and triggers it's on-kill abilities.

It simultaneously feels like a good way to go about it but also a long mess. The other option I've considered is:

Each bullet has a reference to it's owner (eg. player). When an enemy dies to a bullet, it looks to the bullet's owner reference and tells it to trigger it's on-kill effects.

This way is a lot simpler to write, but is error prone eg. In cases where the bullet's owner is killed while their attack is mid-air.

Thank you all!

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[–] Jozzo 3 points 7 months ago (1 children)

The longer I'm using the signal chain the more I'm wanting to rework it to just be a reference lol. Good point with checking if the instance is valid, if any other errors come up I could just patch around them in a similar fashion.

That said, you can probably simplify your signal code if you connected the bullet killed_enemy signal directly to the player’s on-hit handler. It seems like the weapon on-kill handler is redundant?

Ah I see what you mean, killed_enemy(enemy-object) signals directly to the player which can then pass that enemy to it's abilities if needed. You're correct that the weapon signal is mostly redundant, it was just the easiest node to connect to the bullet's signals, as it's responsible for spawning them.

I think I'll change the whole system to just use a reference. Thanks for your input!

[–] [email protected] 1 points 7 months ago

@Jozzo @melmi i would say use signals in editor for level design, and references for code as its doesnt really matter and its simpler. If you shoot a bullet you can just keep reference

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