How would I use delta time in this sprinting script

Help and Feedback Scripting Support
#1

Currently if you use an fps unlocker the stamina drains incredibly fast, this is obviously due to me not using delta time… but I don’t know how I would implement that in this script

local outofstam = false
local maxstamina = 100
local minstamina = 0
local stamina = 100
local staminaclamped = math.clamp(stamina, minstamina, maxstamina)

local hum = game.Players.LocalPlayer.Character:WaitForChild("Humanoid")
function speed(sp)
	hum.WalkSpeed = sp
end

game:GetService("StarterGui"):SetCoreGuiEnabled(Enum.CoreGuiType.All, false)
game:GetService("RunService").RenderStepped:Connect(function()
	if stamina > 100 then stamina = math.clamp(stamina, minstamina, maxstamina) end
	if not outofstam then
		if game:GetService("UserInputService"):IsKeyDown(Enum.KeyCode.LeftShift) then
			if staminaclamped < 1 then
				outofstam = true
				script:WaitForChild("norun").Value = true
				speed(16)
			else
				stamina -= 0.3
				speed(32)
			end
			
		else
			stamina += 0.1
			speed(16)
		end
	else
		if stamina < 30 then
			stamina += 0.1
			speed(16)
		else
			outofstam = false
			script:WaitForChild("norun").Value = false
		end
	end
	staminaclamped = math.clamp(stamina, minstamina, maxstamina)
	script:WaitForChild("stamina").Value = staminaclamped
	--print(staminaclamped)
end)

there is also a gui that goes across the screen depending on the stamina level, but that isn’t important and wouldn’t be changed by delta time usage in the gui because it uses the stamina value in this.

stamina value = a number value that the gui can use
norun value = a bool that will turn the stamina bar red if you are out of stamina/recharging stamina, and will turn green if you can run again

please help this is a serious concern and makes the game on anything higher then 60fps unbearable

1 Like
#2

I do also realize how incredibly inefficient this code is now…
I dont even need stamina clamped as it already clamps the stamina from going above 100 and under 0…

Edit:
oh and if your getting anything less than 60 fps, you suddenly gain a stupid high amount of stamina!
It still sets your speed but is draining less stamina then it should because it drains it a specific amount every frame, less frames = more stamina

1 Like
#3

You could try a while loop with a wait function

local outofstam = false
local maxstamina = 100
local minstamina = 0
local stamina = 100
local staminaclamped = math.clamp(stamina, minstamina, maxstamina)

local hum = game.Players.LocalPlayer.Character:WaitForChild("Humanoid")
function speed(sp)
	hum.WalkSpeed = sp
end

game:GetService("StarterGui"):SetCoreGuiEnabled(Enum.CoreGuiType.All, false)

function Update()
	if stamina > 100 then stamina = math.clamp(stamina, minstamina, maxstamina) end
	if not outofstam then
		if game:GetService("UserInputService"):IsKeyDown(Enum.KeyCode.LeftShift) then
			if staminaclamped < 1 then
				outofstam = true
				script:WaitForChild("norun").Value = true
				speed(16)
			else
				stamina -= 0.3
				speed(32)
			end
			
		else
			stamina += 0.1
			speed(16)
		end
	else
		if stamina < 30 then
			stamina += 0.1
			speed(16)
		else
			outofstam = false
			script:WaitForChild("norun").Value = false
		end
	end
	staminaclamped = math.clamp(stamina, minstamina, maxstamina)
	script:WaitForChild("stamina").Value = staminaclamped
	--print(staminaclamped)
end

while true do
	coroutine.wrap(Update)(task.wait(1/60))
end
#4

Thanks a lot, that works and well, I do think I am going to have to tweak the values again because it seems to be draining at a different rate then usual, but its consistent between 60 and 60+ fps. Although I do still want to learn how to use delta time because there are other places I know I am going to need it, but that can wait because now I feel the incredible urge to rewrite my sprinting script for no reason.

#5

if you want to get deltatime in the source i gave you, simply change

function Update()

to

function Update(deltaTime)
#6

It appears that your version is doing some wild stuff to the memory
it keeps increasing the longer im in the game
oh no

edit:
aaand my game froze around 2-5 minutes later
i think its because of the
while true coroutine

so im just going to change it to this, and see if it works to stop the memory going up constantly


local outofstam = false
local maxstamina = 100
local minstamina = 0
local stamina = 100
local staminaclamped = math.clamp(stamina, minstamina, maxstamina)

local hum = game.Players.LocalPlayer.Character:WaitForChild("Humanoid")
function speed(sp)
	hum.WalkSpeed = sp
end

game:GetService("StarterGui"):SetCoreGuiEnabled(Enum.CoreGuiType.All, false)

function Update()
	if stamina > 100 then stamina = math.clamp(stamina, minstamina, maxstamina) end
	if not outofstam then
		if game:GetService("UserInputService"):IsKeyDown(Enum.KeyCode.LeftShift) then
			if staminaclamped < 1 then
				outofstam = true
				script:WaitForChild("norun").Value = true
				speed(16)
			else
				stamina -= 0.3
				speed(32)
			end

		else
			stamina += 0.1
			speed(16)
		end
	else
		if stamina < 30 then
			stamina += 0.1
			speed(16)
		else
			outofstam = false
			script:WaitForChild("norun").Value = false
		end
	end
	staminaclamped = math.clamp(stamina, minstamina, maxstamina)
	script:WaitForChild("stamina").Value = staminaclamped
	--print(staminaclamped)
end
--[[
while true do
	coroutine.wrap(Update)(task.wait(1/60))
end]]



while task.wait(1/60) do
	Update()
end

and i know its not assets being loaded to memory, because the memory goes up and down normally, but here it goes up at an unusually fast rate

edit 2:
help its still freezing what is wrong, even when i disable the script its still doing it oh god

ok i actually actually fixed it now. cool.

#8

hey i just wanna say please dont use a while loop. your og script using renderstepped was so much better, and your one problem was fps affecting stamina usage. to fix that multiply the stamina cost/regen with the fps:

RunService.RenderStepped:Connect(function(FPS)
stamina += 1 * FPS
stamina -= 1 * FPS
end)
2 Likes
#9

yea I knew I shouldn’t use a loop, there is a “slight” issue though, using that makes the stamina drain INCREDIBLY slow.
Buuut since yours is a better solution I’m going to mark it

edit:
the drain at unlocked fps, around 250, the print output is (0.15 * dt, dt)
image

the drain at locked 60
image

code:


local outofstam = false

local stamina = 100

local hum = game.Players.LocalPlayer.Character:WaitForChild("Humanoid")
function speed(sp)
	hum.WalkSpeed = sp
end

game:GetService("StarterGui"):SetCoreGuiEnabled(Enum.CoreGuiType.All, false)

function Update(DT)
	if stamina > 100 then stamina = math.clamp(stamina, 0, 100) end
	if not outofstam then
		if game:GetService("UserInputService"):IsKeyDown(Enum.KeyCode.LeftShift) then
			if stamina < 10 then
				outofstam = true
				script:WaitForChild("norun").Value = true
				speed(16)
			else
				stamina -= 0.15 * DT
				print(0.15 * DT, DT)
				speed(32)
			end

		else
			stamina += 0.1 * DT
			speed(16)
		end
	else
		if stamina < 30 then
			stamina += 0.035 * DT
			speed(16)
		else
			outofstam = false
			script:WaitForChild("norun").Value = false
		end
	end
	
	script:WaitForChild("stamina").Value = stamina
	--print(staminaclamped)
end



game:GetService("RunService").RenderStepped:Connect(Update)

another edit:
ok i just had to up the values for drain a TON

drain = 10 * dt
refill = 8 * dt
refill to 10% from empty = 3 * dt, once at 10% resumes at normal refill speed

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