Car ai not going to checkpoints correctly

Help and Feedback Scripting Support
1

I have this code, it is intended to make a car drive along a set of checkpoints, however the car does not drive to the checkpoint and does it’s own thing. You can see the video here

local checkpoints = game.Workspace.CarCheckpoints



local Force = 5000

local MaxSteer = 15



local MaxSpeedKM = 50



local car = script.Parent.Parent

local seat = script.Parent



local leftMotor = car.AttachBase.Left

local rightMotor = car.AttachBase.Right




local targetCheckpoint = nil :: BasePart



local speedSet



function goToCheckpoint(checkpointName)

	print(checkpointName)

	targetCheckpoint = checkpoints:FindFirstChild(checkpointName)



	speedSet = seat.ThrottleFloat * Force



	targetCheckpoint.Touched:Connect(function(hit)

		if hit and hit.Parent == car then

			if checkpoints:FindFirstChild(checkpointName + 1) then

				goToCheckpoint(checkpointName + 1)

			else

				targetCheckpoint = nil

			end



		end

	end)

end



goToCheckpoint("1")







while task.wait(0.1) do
	


	if targetCheckpoint ~= nil then

		local checkpointPosition = targetCheckpoint.Position

		local seatPosition = car.AttachBase.Position



		local hyp = math.sqrt((seatPosition.X - checkpointPosition.X)^2 + (seatPosition.Z - checkpointPosition.Z)^2)

		local sad = seatPosition.X - checkpointPosition.X


		local angle = math.deg(math.asin(sad/hyp))

		print(angle)
		
		leftMotor.TargetAngle = angle
		rightMotor.TargetAngle = angle

		car.BackleftWheel.LeftDrive.AngularVelocity= -30
		car.BackRightWheel.RightDrive.AngularVelocity = -30

	

	end





end
2

This references is combining an string + numerical ref, as yoou define the initial checkpoint as a string:

goToCheckpoint("1")

So to increment numerically then convert back to a string ref, you could try:

local nextCheckpoint = tostring(tonumber(checkpointName) + 1)
if checkpoints:FindFirstChild( nextCheckpoint ) then
	goToCheckpoint( nextCheckpoint )
3

I’ll do that but that does nothing to address the issue of the car not going to the waypoint