Regeneration

[TemporarySolutn]

How would I go about giving a default character regeneration as long as condition is true?

[Ultroman]

This is the easy way. Put this in your character LUA's master_postinit() or fn() function.

-- DoPeriodicTask calls the given function every X seconds.
-- I set it to 1.0. You can set it to e.g. 0.5 seconds if you want.
inst:DoPeriodicTask(1.0, function(inst)
	-- Do nothing if the player is dead or doesn't have a health component for whatever reason.
	if not inst.components.health or inst.components.health:IsDead() or inst:HasTag("playerghost") then
		return
	end
	
	-- Do whatever checks you want, e.g., like the if-statement above.
	
	-- You can use whichever numbers you want here e.g. DoDelta(-2.5) to deal 2.5 damage.
	-- Or DoDelta(5) to heal 5 hp. The 'true' tells it to NOT pulse and make a sound every
	-- time the healing happens. It gets annoying.
	inst.components.health:DoDelta(1, true)
end)

But then the task always runs, and your checks are being done all the time. If your checks are simple, then it's alright. If they require a lot of data from different sources and measuring things, then perhaps it would be better to turn the task on and off at will.
You can do that by adding this code to the character LUA, preferably at the top of the file because you will be using the functions at different spots in your code, so they need to be declared early. Here is the code:

local myregentask = nil

local function enableRegen(inst)
	-- Only do something if our task is not already running.
	if not myregentask then
		-- DoPeriodicTask calls the given function every X seconds.
		-- I set it to 1.0. You can set it to e.g. 0.5 seconds if you want.
		myregentask = inst:DoPeriodicTask(1.0, function(inst)
			-- Do nothing if the player is dead or doesn't have a health component for whatever reason.
			if not inst.components.health or inst.components.health:IsDead() or inst:HasTag("playerghost") then
				return
			end
			
			-- Do whatever checks you want, e.g., like the if-statement above.
			-- If you make sure to always disable the regen when the player dies and such,
			-- then you can skip checking a lot of things in here, making the task very light CPU-wise.
			
			-- You can use whichever numbers you want here e.g. DoDelta(-2.5) to deal 2.5 damage.
			-- Or DoDelta(5) to heal 5 hp. The 'true' tells it to NOT pulse and make a sound every
			-- time the healing happens. It gets annoying.
			inst.components.health:DoDelta(1, true)
		end)
	end
end

local function disableRegen()
	-- Only do something if our task is not already running.
	if myregentask then
		myregentask:Cancel()
		myregentask = nil
	end
end

Then you can call enableRegen(inst) or disableRegen() wherever you want, and since they take no parameters other than inst, you can hook them up to any event.

UPDATE: Note that I have corrected a few things over the last couple of minutes.

Edited June 26, 2019 by Ultroman

[TemporarySolutn]

Either the first method doesnt work or im doing something wrong

[Ultroman]

Well, the code looks solid, so you're gonna have to show me your code, and if you're getting a crash I'd like the log with the crash.

[Serpens]

isnt it easier to use the health component with "StartRegen" and "StopRegen" ?
So simply call inst.components.health.StartRegen(amount,period) when you want to start and inst.components.health.StopRegen() when you want to stop.
Where to put this depends on your conditions, most often you will use ListenForEvent to listen for your condition.

Edited July 25, 2019 by Serpens

[Ultroman]

The problem with using StartRegen and StopRegen is that they don't stack, so any other regen, such as the one gained from certain foods, will be overwriting or get overwritten by your regen.