Part not moving with other parts of model during tween

Help and Feedback Scripting Support
#1

I’m working on a grow mechanic for models. Sadly whenever I tween the model, only the meshParts in the model move with the PrimaryPart. The ‘‘sparklePart’’ (a normal part) doesn’t move at all. All parts are welded to the PrimaryPart in the exact some way.
Can someone explain why this happens?

ServerScript

local function spawnCrystal(Model,originalSpawn)
	Model = serverStorage.Archived.Assets.Crystals['2 Crystal Blue']:Clone()
	Model.Parent = workspace
	Model.Parent = workspace
	Model:PivotTo(CFrame.new(originalSpawn))
	local tweenInfo = TweenInfo.new(6,Enum.EasingStyle.Linear,Enum.EasingDirection.In,0,false,0)
	local rayOrgin = Model:GetPivot().Position
	local rayDirection = Vector3.new(0,-100,-0)
	local rayParams = RaycastParams.new()
	rayParams.FilterType = Enum.RaycastFilterType.Whitelist
	rayParams:AddToFilter(workspace.Terrain)
	local result = workspace:Raycast(rayOrgin,rayDirection,rayParams)
	if result then
		local placePosition
		if tonumber(string.sub(Model.Name,1,1)) >= 2 then
			placePosition = result.Position + Vector3.new(0,Model:GetExtentsSize().X/10*4,0)
		else
			placePosition = result.Position + Vector3.new(0,Model:GetExtentsSize().X/10*7.5,0)
		end
		Model:PivotTo(CFrame.new(placePosition - Vector3.new(0,5,0)))

		for _, Emitter in ipairs(Model.sparklePart.growVFX:GetChildren()) do
			Emitter.Enabled = true
		end
		local growTweenModel = tweenService:Create(Model.PrimaryPart,tweenInfo,{CFrame = CFrame.new(placePosition)})
		growTweenModel:Play()
		growTweenModel.Completed:Wait()
		task.wait(4)
		for _, Emitter in ipairs(Model.sparklePart.growVFX:GetChildren()) do
			Emitter.Enabled = false
		end
	end
end

The closed meshPart is the primaryPart.
afbeelding

All parts move, except the sparklePart.

#2

Tweening the BasePart will not move the entire model, especially if they are not Welded (WeldConstraints work differently, so they may not be used).

You’ll have to create a custom Tween function, suited for models, or use old Welds.

1 Like
#3

Everything is welded, and it all works, but for some reason this specific part doesn’t move. Why would everything move except one part? (They’re all welded using ManualWelds).