Making a level "half-reset"?

I'm making a FPS roguelike, and when my player kills all enemies in a room I make a checkpoint where he is. When the player gets killed, I respawn him there and clear up all the mess he made before he died. Issue is, I can't really bring back any enemies he killed because, well, they're dead. I can't reload the scene, because the levels are random. How can I do this?

 

I am not an expert but your question reminded me the command design pattern. As I read from sources and from the videos that I watched, the major use of command design pattern is to undo the actions held in the scene. You can check on that from youtube videos, maybe it will solve your problem to implement that pattern.

 

Maybe, it sounds quite hefty to do though. I'm sorta looking for something like in Hotline Miami, but instead of the floor resetting, it's just your progress IN the floor up to your checkpoint

 

Here's one approach:

- when you make all the enemies for a level, put the GameObject references into a list
- now go and SetActive(false); all of them. These enemies will NEVER attack the player or even play in the game. They are "hot-swap templates" waiting to make fresh enemies.

- when you start the level (OR restart the level):

--> iterate the list of hot-swap disabled enemies:
-----> Clone it with Instantiate<T>() and its position / rotation
-----> SetActive(true) the clone
-----> put the clone in a list to destroy when the player dies

 

There are no truly random numbers in a computer. If your levels are random, nothing stops you from generating the exact same level twice using the same seed. Generally speaking it would be possible to simply reload the scene / level. Whether that is the easiest solution for your situation depends on what exactly you are doing.

 

This is stupidly simple I love it. Thank you so much dude

 

Suits me because I'm stupidly simple too!

Is this for your procgenned office building layout? It seems such a system would be perfect for that style of procgen game.

If you want to have certain minibosses that REALLY get killed and don't resurrect, just have them additionally Destroy() their original template enemy, and then you'll only have to kill those guys once, but everybody else respawns.

 

yeah sorta, i dropped the procedural office because it was hard to do and went with prefabs. But yeah enemies don't come back ever so destroying their source would be a good idea