Why can't I tween a model with a weld?

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#1

So, I’m working on an escape room and I scripted a key code chest. Once it’s correct, the tween on the red brick should rotate and pull the top of the chest top open on the hinge. I used a qPerfection welding script on the top of the chest so it should work as it was planned. However, when I test the game in-studio, the red brick tweens and rotates itself without taking the unanchored welded model with it when it’s clearly welded to a welded model top. This used to work fine, but now, I’m not sure what to do. I don’t want to use hinges because they will cause more lag in the game. So, I plan on used tweeting for doors, chests, lockboxes, safes, vaults, etc… If you have any info, it would be greatly appreciated and it’ll help a lot. Thanks! :smiley:

Here’s also my script for the Tween:

local RS = game:GetService("ReplicatedStorage")
local RF = RS:WaitForChild("AlexDormRoom"):WaitForChild("LockBoxes"):WaitForChild("VaultzChest1")
local TS = game:GetService("TweenService")

--Functions--
RF.OnServerInvoke = function(player, codeEntered)
	local MotorAxis = game.Workspace:WaitForChild("Alex's Room").VaultzLockChest.Motor
	local goal = {}
	goal.Orientation = Vector3.new(-75, -90, 0)

	local tInfo = TweenInfo.new(
		1.5,
		Enum.EasingStyle.Linear,
		Enum.EasingDirection.Out,
		1,
		false,
		0
	)
	local tween = TS:Create(MotorAxis, tInfo, {Orientation = Vector3.new(-75, -90, 0)})

	if codeEntered == '7264' then
		tween:Play()
		
		
		return true
	
		
		else
		return false
	end
end

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#2

why cant i move something that is glued to the floor? You would need to explictly tween it with its .Position property

#3

This should be able to work since the position never changes in the script. If I did change the position of the other parts, then they would all just go to the position which is deforming the shape of the top of the lock-chest.

#4

Why don’t you use a WeldConstraint for the weld instead.

#5

There’s way too many parts to weld together since it’s too detailed.

#6

Common mistake is to Tween models/welded parts using Orientation or Position.

Only use CFrame when tweening multiple parts together. Tweening Position or Orientation will break welds.

2 Likes
#7

Yeah, I haven’t learned Cframe as much as tweening, so I’m not sure how to do that yet. But that’s something I’ll look into.

#8

It’s not difficult, below is the CFrame equivalent of your goal orientation

local goalCFrame = CFrame.new(MotorAxis.Position) * CFrame.Angles(math.rad(-75), math.rad(-90), 0))
1 Like
#9 
CFrame = {MotorAxis.CFrame * CFrame.Angles(math.rad(-75),math.rad(-90),0)
}

don’t forget to weld all parts to MotorAxis and Anchor = false all your parts except main part(MortorAxis)

#10

make mortoraxis be PrimaryPart of model