Resizing a part on one face in a loop issue

[astraIboy (The Batman)]

So I know that when I resize the part i need to move it half of how much I resized it, but problem is that doesnt work in a loop and it just goes crazy, here is my code

Video Of Issue:

[ThanksRoBama (Emma)]

What’s supposed to happen? charscharschars

[astraIboy (The Batman)]

Uh so basically making the part as long as the distance between the part and the mouse

[astraIboy (The Batman)]

So like this sorry for the bad drawin

[ThanksRoBama (Emma)]

BTW you can format code by enclosing it in ``` or pressing the code-formatting button:

Drawing is perfect xD

Here’s how it can be done:

game:GetService("RunService").Heartbeat:Connect(function()
    if not holding then return end
    
    --The start point is the center, moved back by half it's length
    local partStartPoint = heldPart.Position - heldPart.CFrame.LookVector * heldPart.Size.Z / 2
    local partEndPoint = mouse.Hit.Position
    
    heldPart.Size = (partEndPoint - partStartPoint).Magnitude
    --This places the part's center at partStartPoint
    heldPart.CFrame = CFrame.new(partStartPoint, partEndPoint)
    --This moves the part forwards by half it's length
    heldPart.CFrame += heldPart.CFrame.LookVector * heldPart.Size.Z / 2
end)

[astraIboy (The Batman)]

Had to make a few adjustments and changes but, it’s working now!

Thank you so much for your time, I appreciate it greatly

My Updated Code :