Tweening RopeLength Issue

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#1

Hey, I am trying to create sort of an elevator rig using rope constraints. I want the elevator to move with a sort of easing style (slow, fast, slow [inOut]) into its final position where the ropeConstraints length is 0.

I thought since RopeConstraint.Length is just a number value, the tweenService could handle it. But I get an error telling me:

20:27:59.030 - Unable to cast value to Object

This is my code:

local ropeSystem = script.Parent.Parent.ropeSystem
local door = script.Parent.Parent.doorModel.door
local endPos = ropeSystem.endPos
local startPos = ropeSystem.startPos
local rope = endPos:FindFirstChild("RopeConstraint")

local f = false
local TweenService = game:GetService("TweenService")
local tween = TweenService:Create(rope.Length, TweenInfo.new(15, Enum.EasingStyle.Quad, Enum.EasingDirection.InOut), {number = 0})

script.Parent.ClickDetector.MouseClick:connect(function(plr)
	if plr and f == false then
		f = true
		wait(1.5)	
		local angularVel = game.ReplicatedStorage.BodyAngularVelocity:Clone() 
		angularVel.Parent = door --close door
		wait(2)
		if ropeSystem then
			if door:FindFirstChild("BodyAngularVelocity")then
				angularVel:Remove()
				wait()
				if rope then
					--[[local magnitude = rope.Length
					for i = magnitude, 0, -.6 do
						wait()
						rope.Length = i
					end
					wait(2)--]]
					tween:Play() -- Tween
					angularVel.Parent = door
					door.HingeConstraint.TargetAngle = 0
					angularVel.AngularVelocity = Vector3.new(0,-2,0) -- open door
				end
			end
		end
	end
end)

Why is this not working?

How to make a model move up and down when you press a button
#2

Your creation of the tween is wrong. The first parameter should be the instance and the last parameter is a table of properties.

E.g.

local tween = TweenService:Create(rope, TweenInfo.new(15, Enum.EasingStyle.Quad, Enum.EasingDirection.InOut), {Length = 0})
2 Likes
#3

Much appreciated. First time using the service.