local Mouse=game.Players.LocalPlayer:GetMouse()
local Camera=game.Workspace.CurrentCamera
local v3=Vector3.new

local Rotating=false

local Part=game.Workspace.Rotate

local MouseInitial=v3(0,0,0)

Mouse.Button1Down:connect(function()
 local PartCFrameInitial=Part.CFrame
 local PartOrientationInitial=PartCFrameInitial-PartCFrameInitial.p
 local MouseInitial=v3(Mouse.X,-Mouse.Y,0)
 Rotating=true
 while Rotating do
  wait()
  local cmouse = v3(Mouse.X,-Mouse.Y,0)
  if cmouse ~= MouseInitial then
	  local CameraCFrame=Camera.CoordinateFrame
	  local CameraOrientation=CameraCFrame-CameraCFrame.p
	  local v0=CameraCFrame.p-PartCFrameInitial.p
	  local v1=CameraOrientation*(cmouse-MouseInitial)
	  local cf=PartCFrameInitial*CFrame.fromAxisAngle(PartOrientationInitial:inverse()*v0:Cross(v1),v1.magnitude/100)
	  local jcf = cf
	  Part.CFrame = jcf
	  print(v0)
	 end
 end
end)

Mouse.Button1Up:connect(function() Rotating=false end)