local PhysicsService = game:GetService("PhysicsService")
local RunService = game:GetService("RunService")
PhysicsService:RegisterCollisionGroup("SeatDefault")
PhysicsService:CollisionGroupSetCollidable("SeatDefault", "SeatDefault", false)
local SimulateFalloff = true
local FalloffThreshold = 45
local DistanceDisconnect = 6
local function descendantAdded(d)
	if d:IsA("Weld") and d.Name == "SeatWeld" then
		task.spawn(function()
			task.wait(0)
			local Seat = d.Parent
			local Part0 = d.Part0
			local Part1 = d.Part1
			local Character = Part1.Parent
			d.Enabled = false
			local IsNetworkAuto = Part1:GetNetworkOwnershipAuto()
			local NetworkOwner
			if not IsNetworkAuto then
				NetworkOwner = Part1:GetNetworkOwner()
			end
			d:SetAttribute("MigratedToV2", true)
			local A0 = Instance.new("Attachment")
			A0.Parent = Seat
			A0.Name = "SeatAttachment"
			A0.CFrame = d.C0*(d.C1:Inverse())
			local Parts = {}
			local A1 = Instance.new("Attachment")
			A1.Parent = Part1
			local AP = Instance.new("AlignPosition")
			local AO = Instance.new("AlignOrientation")
			AP.Parent = Seat
			AP.Attachment0 = A1
			AP.Attachment1 = A0
			AP.Responsiveness = 40
			AP.MaxForce = math.huge
			AP.RigidityEnabled = true
			AP.Name = "SeatAlignPosition"
			AO.Parent = Seat
			AO.Attachment0 = A1
			AO.Attachment1 = A0
			AO.Responsiveness = 100
			AO.Name = "SeatAlignOrientation"
			local Seated = true
			local Collisions = {}
			for _, v in ipairs(Character:GetDescendants()) do
				if v:IsA("BasePart") then
					Collisions[v] = v.CanCollide
				end
			end
			local SeatCollision = RunService.Stepped:Connect(function()
				for _, v in ipairs(Character:GetDescendants()) do
					if v:IsA("BasePart") then
						v.CanCollide = false
					end
				end
			end)
			d:GetPropertyChangedSignal("Parent"):Connect(function()
				if not d:IsDescendantOf(game) then
					Seated = false
					A0:Destroy()
					A1:Destroy()
					AP:Destroy()
					AO:Destroy()
					SeatCollision:Disconnect()
					for _, v in ipairs(Character:GetDescendants()) do
						if v:IsA("BasePart") then
							local CC = Collisions[v]
							if CC then
								v.CanCollide = CC
							end
						end
					end
					if IsNetworkAuto then
						Part1:SetNetworkOwnershipAuto()
					else
						Part1:SetNetworkOwner(NetworkOwner)
					end
				end
			end)
			local function disconnect()
				d:Destroy()
				local humanoid = Part1.Parent:FindFirstChildOfClass("Humanoid")
				if humanoid then
					humanoid.Sit = true
					humanoid:GetPropertyChangedSignal("Sit"):Wait()
					humanoid.Sit = true
				end
			end
			pcall(function()
				while Seated do
					if SimulateFalloff and ((Seat.Orientation.X < -FalloffThreshold or Seat.Orientation.X > FalloffThreshold) or (Seat.Orientation.Z < -FalloffThreshold or Seat.Orientation.Z > FalloffThreshold)) then
						disconnect()
						break
					end
					if (Part1.Position - Seat.Position).Magnitude > DistanceDisconnect then
						disconnect()
						break
					end
					pcall(function()
						local Owner = nil
						if not Seat:IsGrounded() then
							Owner = Seat:GetNetworkOwner()
						end
						Part1:SetNetworkOwner(Owner)
					end)
					task.wait(0.01)
				end
			end)
		end)
	end
end
workspace.DescendantAdded:Connect(descendantAdded)
for _, v in ipairs(workspace:GetDescendants()) do
	descendantAdded(v)
end