Make a part that can tween up and down

Help and Feedback Scripting Support
#1

I’m trying to make a part that can move up and down infinitely using tween service however there’s lots of lag and when I try to call two tween animations the part get stucked to the same position for ever

Here’s the outcome

local function translateDownFunc()
	local translationSpeed = 3

	local tweenInfoTranslate = TweenInfo.new(translationSpeed, Enum.EasingStyle.Linear, Enum.EasingDirection.In)
	
	local goalTranslation = {Position = defaultPartPosition + Vector3.new(0, 3, 0)}
	local goalTranslation2 = {Position = defaultPartPosition + Vector3.new(0, -3, 0)}

	local translatePart = TweenService:Create(part, tweenInfoTranslate, goalTranslation)
	local translatePart2 = TweenService:Create(part, tweenInfoTranslate, goalTranslation2)
	
	translatePart:Play()
	translatePart2:Play()
	
	translateDownFunc()
end

translateDownFunc()
#2

You’re playing both the tweens at the same time. To fix this, do something like this

local translationSpeed = 3

local tweenInfoTranslate = TweenInfo.new(translationSpeed, Enum.EasingStyle.Linear, Enum.EasingDirection.In)
	
local goalTranslation = {Position = defaultPartPosition + Vector3.new(0, 3, 0)}
local goalTranslation2 = {Position = defaultPartPosition + Vector3.new(0, -3, 0)}

local translatePart = TweenService:Create(part, tweenInfoTranslate, goalTranslation)
local translatePart2 = TweenService:Create(part, tweenInfoTranslate, goalTranslation2)

function down()
translatePart2:Play()
translatePart2.Completed:Connect(function()
up()
end)
end
function up()
translatePart:Play()
translatePart.Completed:Connect(function()
down()
end)
end

up()
#3

im not sure why ur doing this

in the function down() ur already calling up() but it doesn’t know that up() exists yet since u put it above the function

you can simply do this:

translatePart:Play()
translatePart.Completed.Wait()
translate.Part2:Play()

you can also make this into a loop

#4

I litterally tried this first and didn’t work I’ll tried the other one code

#5

Yayt your code doesn’t work either I don’t see part moving at all

#6

did you check the output? are there any errors? also i accidentally made a typo in my solution so try changing that

#7

By the way you put a . it’s translatePart2

#8

i know, have you tried removing it?

#9

Yeah and there’s also wait . it’s :

#10

i was half awake typing this so try fixing all the typos i made and see

#11

It work at the start but doesn’t repeat itself infinitely and sometimes the part instantly move to the y position and the animation isn’t smooth at all

#12

Do you want me to add you in the game so you have a better grasp about the overall code ?

Alright here’s the video

#13

Wait a minute I’m close to finding solution

#14

If you want something like this, use :lerp
robloxapp-20240311-1039476.wmv (1.4 MB)

#15

How would I use it in my own tweening and I see that you know how to make pets and eggs system that’s cool ?

#16

I tried this line of code but doesn’t seems to work well

function up()
	--translatePart:Play()
	script.Parent.CFrame = script.Parent.CFrame:Lerp(script.Parent.CFrame + CFrame.new(0, 3, 0), 1)
	wait(3)
	script.Parent.CFrame = script.Parent.CFrame:Lerp(script.Parent.CFrame + CFrame.new(0, -6, 0), 1)
	wait(3)
	script.Parent.CFrame = script.Parent.CFrame:Lerp(script.Parent.CFrame + CFrame.new(0, 3, 0), 1)
	wait(3)
	up()
	--translatePart.Completed:Wait()
	--defaultPartPosition += Vector3.new(0, 3, 0)
	--translatePart2:Play()
	--defaultPartPosition += Vector3.new(0, -3, 0)
	--translatePart2.Completed:Connect(up)
end

up()
#17

That’s because it’s not in a loop. Try adding it inside a while function

#18

How did you use Lerp concept to achieve your things on the pet system I don’t understand how to use lerp

#19

What I’m trying to achieve basically is the part slowly moves at the start then it increases exponentially until the end goal but to achieve this with :Lerp() function which stands for Linear Interpolation I would basically have to change the interpolation value so like basically if I want to change the speed says at the start I want 0.2 and at the end 0.8 how do I achieve this ?

#20

Alright :Lerp seems to be working fine but parts are teleporting and I have no idea why it does this annoying issue

local part = script.Parent

local lowerBound = part.Position - Vector3.new(0, 0.29, 0)
local upperBound = part.Position + Vector3.new(0, 0.25, 0)

local radiansPerSecond = math.rad(90) -- a quarter turn every second (we need to do this to maintain a consistent velocity), needs to be wrapped in math.rad as CFrame.Angles takes an arg in radians not degrees

local identityRotation = CFrame.identity.Rotation -- equivalent of CFrame.Angles(0, 0, 0)

local currentRotation = identityRotation -- our starting rotation
local isUp = true
--------------------------------------------
--										  --
--					UP/DOWN				  --
--										  --
--------------------------------------------
while true do

	local now = tick()
	wait()

	if isUp == true then

		
		for i = 1, 25, 0.1 do
			-- math.sin returns a value between -1 and 1 so we first need to add 1 to get a number between 0 and 2, then divide by 2 (multiply by 0.5) to get a number between 0 and 1 so it does not exceed the boundaries we set above
			local position = upperBound:Lerp(lowerBound, (math.sin(i)) * 1)

			-- finally apply our current CFrame to the part's CFrame
			part.CFrame = CFrame.new(position) 

			wait()
		end
		
		isUp = false
	elseif isUp == false then
		print("LAG IS HAPPENING")
		
		for i = 1, 25, 0.1 do
			-- math.sin returns a value between -1 and 1 so we first need to add 1 to get a number between 0 and 2, then divide by 2 (multiply by 0.5) to get a number between 0 and 1 so it does not exceed the boundaries we set above
			local position = lowerBound:Lerp(upperBound, (math.sin(i)) * 1)

			-- finally apply our current CFrame to the part's CFrame
			part.CFrame = CFrame.new(position) 

			wait()
		end
		
		isUp = true
	end
	
	
	



	print("ANIMATION FINISHED")
end

Trying to make parts go at differents heights and speed and not start and end at the same time