How could I check if a NPC is added?

[xxXDuckzzXxx (xXDuckzXx)]

Hey! So I’m using a script that makes blood drops when a player is damaged. The script is a server script so everything is controlled by one script. I want to use this same effect for the enemies in my game and keep using only one script. Is there a way to check if a Humanoid or a NPC has been added to the workspace or a folder. Something like when using PlayerAdded

I tried looking around for a solution but couldn’t find something that was similar enough to my issue.

(I didn’t make this script I used a YouTube tutorial)

local HealthPerDrop = 7
local DropLifeTime = 3.5
local DropSizeMin, DropSizeMax = 0.1, 2.4

local Blood = script:WaitForChild("Blood")

local tweenservice = game:GetService("TweenService")
local tweeninfo = TweenInfo.new(0.3, Enum.EasingStyle.Quint, Enum.EasingDirection.InOut)



game.Players.PlayerAdded:Connect(function(plr)
	
	plr.CharacterAdded:Connect(function(char)
		
		local hum = char:WaitForChild("Humanoid")
		
		local PreviousHealth = hum.Health
		
		hum.HealthChanged:Connect(function(NewHealth)
			
			local HealthDif = PreviousHealth - NewHealth
			
			PreviousHealth = NewHealth
			
			if HealthDif < 0 then return end
			
			local NumOfDrops = math.floor(HealthDif/ HealthPerDrop)
			
			local DropsFolder = Instance.new("Folder", workspace)
			
			for i = 1, NumOfDrops do
				
				local DropSize = math.random(DropSizeMin * 10, DropSizeMax * 10) / 10
				
				local BloodDrop = Blood:Clone()
				BloodDrop.Size = Vector3.new(0,0,0)
				
				local xPos = char.HumanoidRootPart.Position.X + math.random(-30,30) / 10
				local yPos = char.HumanoidRootPart.Position.Y - char:WaitForChild("Left Leg").Size.Y/2 + 0.05
				local zPos = char.HumanoidRootPart.Position.Z + math.random(-30,30) / 10
				
				BloodDrop.Position = Vector3.new(xPos, yPos, zPos)
				
				BloodDrop.Parent = DropsFolder
				
				tweenservice:Create(BloodDrop, tweeninfo, {Size = Vector3.new(0.05, DropSize, DropSize)}):Play()
				
			end
			
			wait(DropLifeTime)
			DropsFolder:Destroy()
		end)
		
	end)
	
end)

[DasKairo (Cairo)]

You should be using ChildAdded which would get the Item that has been add into the Instance

[Dede_4242]

I think you can do something like:

while true do
    wait(0.1)
   game:GetService(“Workspace”):WaitForChild(“NPCName”)
end

[xxXDuckzzXxx (xXDuckzXx)]

So i could do something like

Local zombie = Folder.ChildAdded

If zombie.name = Zombie then

Do all the stuff and things

End

[DasKairo (Cairo)]

ChildAdded is a Connection that has the Instance that was Added, so yes:

SomeInstance.ChildAdded:connect(function(Object)
    if Object.Name = "Zombie" then
        -- code
    end
end)

[xxXDuckzzXxx (xXDuckzXx)]

Ah gotcha. Im currently not home so I cant test it out but thanks for the help! Have a good day

[DasKairo (Cairo)]

@Dede_4242

while true do
    wait(0.1)
   game:GetService(“Workspace”):WaitForChild(“NPCName”)
end

I dont think you understand how WaitForChild works.

[Dede_4242]

Wait, wouldn’t my script wait for the child to be added? That’s what WaitForChild is for

[DasKairo (Cairo)]

no, it would be a waste of resources to do so, Instance.ChildAdded would be much more efficient for this usage, plus WaitForChild has a Time out, so if it doesn’t find the object within a period of time, it will yield, so your your code is basically this:

while true do -- creates a loop
    wait(.1) -- waits .1 of a second

    workspace:WaitForChild("NPCName") -- Yields until Child is found within a time limit
end

Do you mean this?

repeat wait() until workspace:FindFirstChild("NPCName", true)

[Dede_4242]

Oh sorry, I’m not a Programmer, and yes I meant something like what you said, sorry for getting that wrong, I’m gonna remember for next time tho!