Tweening scale in one direction

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#1

I’m creating a laser beam effect for my game and I’ve been searching the devforum for a solution, but I can’t seem to figure out the issue with my position tweening. I understand to scale a part in a single direction you have to tween both the Size and Position properties, but I can’t figure out how to move the beam part in the opposite direction, my current script just causes it to fly across the map.

    local TweenService = game:GetService("TweenService")

	local beam = Instance.new("Part")
	beam.Shape = Enum.PartType.Cylinder
	beam.Material = Enum.Material.Neon
	beam.Color = Color3.new(1,1,1)
	beam.Anchored = true
	beam.Size = Vector3.new(3,3,3)
	beam.Parent = Character
	beam.Position = Character:FindFirstChild("RightHand").Position
	beam.CanCollide = false
	
	beam.Rotation = Character:FindFirstChild("HumanoidRootPart").Rotation + Vector3.new(0, 90, 0)
	
	local tweeninfo = TweenInfo.new(1)
	local scaletween = TweenService:Create(beam, tweeninfo, {Size = Vector3.new(30, 3, 3)})
	
	local pos = beam.CFrame
	local movetween = TweenService:Create(beam, tweeninfo, {Position = (beam.CFrame * beam.CFrame.Rotation).LookVector})
	
	scaletween:Play()
	movetween:Play()
#2

I got it to work 50% of the time. Half the time it shoots in the intended direction, and the other half the beam goes in the exact opposite direction. This is the code:

local movetween = TweenService:Create(beam, tweeninfo, {CFrame = beam.CFrame - (beam.CFrame * CFrame.Angles(0,math.rad(90),0)).LookVector*beamlength/2})
#3

Try to use CFrame instead of that line

And from my experience there is no such a thing like CFrame.Rotation. Try to avoid that even if it somehow worked for you.

#4

Thank you! This solved the problem

#5

CFrame.Rotation is very useful thing that returns copy of cframe with zero position but with rotation

#6

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