Pathfinding Vehicle - How would it work?

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Hey! I’m happy to see this question, since I actually built the car with these sorts of use-cases in mind.

You can start out by removing some of the unnecessary client control scripts and adding a new script for the AI driving

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To make the car drive around, all you need to do is hook up the Controller:update function

-- AI driver script

local RunService = game:GetService("RunService")

local Controller = require(script.Parent.Parent.Controller)

local function onStepped(_, deltaTime: number)
	Controller:update(deltaTime)
end

RunService.Stepped:Connect(onStepped)

You can now change the steeringInput, throttleInput, nitroInput, and handBrakeInput attributes on Car.Inputs and it will respond accordingly.

Making a proper car driving algorithm is a lot more involved, as you’ll want to do some sort of path planning to optimize the steering/throttle/braking/etc, but here’s a simple example of getting it to drive to a specific target part in workspace.

-- AI driver script

local RunService = game:GetService("RunService")
local Workspace = game:GetService("Workspace")

local Controller = require(script.Parent.Parent.Controller)
local Constants = require(script.Parent.Parent.Constants)

local car = script.Parent.Parent.Parent
local chassis = car.Chassis
local inputs = car.Inputs
local target = Workspace.Target

local MIN_SPEED_DISTANCE = 20
local MAX_SPEED_DISTANCE = 100

local function onStepped(_, deltaTime: number)
	-- Calculate the direction to the target
	local targetOffset = chassis.CFrame:PointToObjectSpace(target.Position)
	local targetAngle = math.atan2(targetOffset.X, -targetOffset.Z)
	
	-- Update the steering direction
	inputs:SetAttribute(Constants.STEERING_INPUT_ATTRIBUTE, targetAngle)
	
	-- Calculate the distance to the target
	local distance = targetOffset.Magnitude
	-- Calculate a throttle speed based on distance. We want to go slower when closer so
	-- that our turning radius is tighter
	local throttle = math.clamp((distance - MIN_SPEED_DISTANCE) / MAX_SPEED_DISTANCE, 0, 1)
	
	-- Update the throttle
	inputs:SetAttribute(Constants.THROTTLE_INPUT_ATTRIBUTE, throttle)
	
	-- Update the controller
	Controller:update(deltaTime)
end

RunService.Stepped:Connect(onStepped)

You could modify this to pick the next target in your path once the car gets close enough

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