Tweening the position of the primary part doesn't tween the whole model even when welded

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#1

as the title says

I’m trying to tween the position of the model while having all of it’s children in the right place. However, when I tween the primaryPart (which is welded to all children) only the primary part moves and the other parts just float without moving.

Now I know the solution is to tween the CFrame instead but I’m trying to keep the orientation of the model the same and CFrame doesn’t help with that

local PrimaryPart = script.Parent.PrimaryPart
local TweenService = game:GetService("TweenService")
local Tweeninfo = TweenInfo.new(5,Enum.EasingStyle.Linear,Enum.EasingDirection.In)
local Properties = {Position = workspace.TestPart.Position}


task.wait(3)
print("Moving")

PrimaryPart.CFrame = CFrame.lookAt(PrimaryPart.Position,workspace.TestPart.Position)
task.wait(2)
TweenService:Create(PrimaryPart,Tweeninfo,Properties):Play()

Any help would be great

#2

Use Model:TranslateBy(position: Vector3) if you wish to move a model while preserving orientation.
You should really be using PVInstance:PivotTo(targetCFrame: CFrame) though.

To tween using these methods though you would probably want a script that looks like this

local TweenService = game:GetService("TweenService")

local function TweenModelCFrame(Model: Model, Info: TweenInfo, TargetCFrame: CFrame)
	local CFrameValue = Instance.new("CFrameValue")
	CFrameValue.Changed:Connect(function(NewCFrame)
		Model:PivotTo(NewCFrame)
	end)
	
	local Tween = TweenService:Create(CFrameValue, Info, {Value = TargetCFrame})
	Tween:Play()
	
	Tween.Completed:Connect(function()
		CFrameValue:Destroy()
		Tween:Destroy()
	end)
end
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#3

Just make a new CFrame with only the position of the Part set.

local PrimaryPart = script.Parent.PrimaryPart
local TweenService = game:GetService("TweenService")
local Tweeninfo = TweenInfo.new(5,Enum.EasingStyle.Linear,Enum.EasingDirection.In)
local TestC = workspace.TestPart.CFrame
local NewC = CFrame.new(TestC.X, TestC.Y, TestC.Z)  * PrimaryPart.CFrame.Rotation
local Properties = {CFrame = NewC}


task.wait(3)
print("Moving")

PrimaryPart.CFrame = CFrame.lookAt(PrimaryPart.Position,workspace.TestPart.Position)
task.wait(2)
TweenService:Create(PrimaryPart,Tweeninfo,Properties):Play()
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