Introduction to Tweening Models

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#66

Yeah, so are we still stuck with using welds?

#67

No? Please read what I wrote in my reply and the top of the thread again. The legacy method does not use welds and I mentioned that pivots can be used as drop-in replacements for the legacy problematic functions dealing with primary parts.

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#68

Oh, my apologies. The legacy method can still be used with using the pivot functions, however, the downside still is with the CFrameValue. So as long as I do not interact with this value while itā€™s tweening, my model wouldnā€™t have any issues, right? And also, what about this?

Donā€™t you think welds are more of a performant option? Or am I missing something here?

#69

Itā€™s a bit of an overstatement but itā€™s comparing introducing a proxy instance for a quick movement versus applying the tween directly. Welded parts behave as if theyā€™re anchored anyway but are constrained in relative space to the part theyā€™re attached. Both are effectively updating CFrames in their respective steps.

Iā€™ll update the thread with further information at a later date.

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#70

Do you tween the model on the server or the client? Because in the Server it does seem to throttle a bit. I wouldnā€™t use collisions on that specific model, but I was thinking of using it to collide with the golf ball on my game (which has its physics handled on the server).

#71

Rule of thumb is to make the client responsible for the movement in most or all cases. The server will inherently be incapable of processing intermediates as fast as a client be it interpolation or physics. That being said, in the case of a physics-based golf ball thereā€™s two possible routes I might go: have the rotation of the related obstacle also physically-simulated or push everything to the client and employ server validation for the golf ball (position tracking and the like).

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#72

Oh, I guess Iā€™ll try to physically simulate it then, because the other seems like it would give a noclip impression for some players. Thanks.

#73

how can I make two or more model tween as the same time. For instance, Iā€™m using this method to make a helicopter for my cutscene. I used this and I made the whole helicopter move, but I want the tail rotor and the top rotor to spinning around at the same time too. I tried to spin it by using CFrame.Angles but it just spin the whole model.

#74

This tutorialā€™s primary coverage is on simple models and serves as a baseline for what you may expect for when you tween models. It doesnā€™t cover any higher level use cases like tweening submodels while keeping them relative to their parent model.

In the case of a helicopter, what youā€™re likely going to want to do is weld all parts of the respective rotors to a core part and then tween the C0 or C1 of that core part to form a rotation. For example, the top rotor parts would be welded to a ā€œmotor partā€ with a weld to the main body and you can change the CFrame offsets of that weld to give it the spinning effect you desire.

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#76

That can make it look unrealistic tbh

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#77

Nice! The script works! how would you move the model? Not rotating though

#78

Movement is the second code sample in ā€œTweening Your Modelā€ directly under the first one which covers rotation.

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#79

Iā€™ve been having a problem with this approach, and one that Iā€™m not sure can be solved. Iā€™m trying to make my model (on the client) make several revolutions in its orientation, and unfortunately CFrame angles get moduloed so that theyā€™re under 360 degrees. This makes it seemingly impossible to use a CFrame tween to accomplish what I want.

Using Orientation by itself makes only the PrimaryPart move, so thatā€™s out of the question. So, I found what at first I thought was a good solution: Tweening the CFrameā€™s Position and the Orientation separately. Unfortunately, this causes the PrimaryPart to move without rotating, and oddly enough, the welded parts rotate at an ever-increasing rate, for reasons I canā€™t quite discern.

Any help would be appreciated. Iā€™m all out of ideas. If a demo file is needed I can make one, but itā€™d probably take me a while to get around to it, as I donā€™t want to share the entire place file (for obvious reasons).

EDIT: Ugh, judging by other posts I found it looks like Iā€™m going to have to use RenderStepped for this. I donā€™t get why this isnā€™t supported by tweening CFrames and instead something I have to write like this. Any other approaches that feel less hacky are appreciated.

#80

So unfortunate that this isnā€™t builtin to the engine. Thank you for the tutorial and code.

#81

Here is an example of rotating a door several times around a hinge using a tween and some recursion magic (comments added to the local script for clarity):

local TweenService = game:GetService("TweenService")
local ReplicatedStorage = game:GetService("ReplicatedStorage")
local door = ReplicatedStorage:WaitForChild("Door"):Clone() --Door is a model with a few parts welded together
local hinge = door:WaitForChild("Hinge") --Hinge is the primary part of the model and is the only anchored part
door.Parent = game.Workspace
local tweenInfo = TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.In, 0, false, 0)
local tween

local function RotateDoor()
	--This will grab the hinge's current pivot and rotate it by 120 degrees (use -120 to rotate in the other direction)
	--This does not go to a 120 degree fixed orientation in the workspace, rather it transforms the current rotation by 120 degrees
		--It works regardless of the current rotation
	--120 is chosen because it is a factor of 360, so the tween will always move in the same direction
	tween = TweenService:Create(hinge, tweenInfo, {CFrame = hinge:GetPivot() * CFrame.Angles(0,math.rad(120),0)})
	tween:Play()
	tween.Completed:Connect(RotateDoor)
end

local function DestroyTween()
	tween:Pause() --Immediately stops the tween in its current location. Using cancel or destroy has a small delay
	tween:Destroy() --Cleanup
end

RotateDoor() --Initial play to begin the loop
task.wait(8)
--An example of how to stop the tween loop
DestroyTween()

task.wait(3)
--And how to restart it after it was stopped
RotateDoor() --Notice how the object will resume its rotation from its current spot and doesn't need to reset

Hereā€™s a short vid to show it in action:

Be aware more logic is needed if the object returns to a default state.

Hope it works out for ya!

P.S. You could also create this using 3 different tweens with static rotational values, and would probably work out better if the object needed to return to a default state. It would probably also be more performant since youā€™ll only need to create the tweens once ā€¦suppose I shouldā€™ve coded it that way lol.

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#82

Hey! Im new to tweening models, however it wont let me add -0.2 to the Z coordinate of the tween, here is what iā€™ve got,

local TweenServ = game:GetService("TweenService")

local DoorLeftModel = script.Parent.Left
local DoorRightModel = script.Parent.Right

wait(3)
TweenServ:Create(DoorRightModel.PrimaryPart, TweenInfo.new(1), {CFrame = DoorRightModel.PrimaryPart.CFrame + CFrame.new(Vector3.new(0, 0, -0.2))}):Play()

And its saying vector 3 is expected.

#83

I need some help. I donā€™t how I can tween a single model
ā€“ References ā€“

local TweenServ = game:GetService(ā€œTweenServiceā€) ā€“ CRTICAL - DO NOT TAMPER WITH ā€“

local TweenDoor = script.Parent:WaitForChild(ā€œDoorModelā€)

local TweenInform = TweenInfo.new(0.5)

ā€“Configurationā€“

Enum.EasingStyle.Linear,

Enum.EasingDirection.InOut,
this is my script here. can somebody help me please with this?

#84

Iā€™m new to use tweening so i need a bit of help
I donā€™t know how to tween objects
I only know a few things about scripting

#85

I do exactly this
I make a tween for the primary part where it simply goes up and down
Every single part doesnt move except for primary part
pain.

#86

This will absolutely do nothing and throw out errors, arenā€™t you better off just copying the script he gave in the example? It works perfectly fine