BeamNG Police Chase Code

local M = {}

local scenario = require("scenario/scenarios")
local helper = require("scenario/scenariohelper")
local player = nil
local playerPos = nil
local playerDistance = nil
local nonPlayers = {}
local racers = {}
local racerPos = nil
local racerVel = nil
local sceneTimer = 0
local score = 0
local totalRacers = 0
local Racer = {instance = nil, state = true, arrestTimer = 0}

function Racer:new(instance, state, arrestTimer) --Racer object
    local self = setmetatable({}, Racer)
    self.__index = self
    self.instance = instance or nil
    self.state = state or true
    self.arrestTimer = arrestTimer or 0
    return self
end

local function arrestRacer(theRacer) --Triggers when conditions are true
    if theRacer.state then
        if theRacer.arrestTimer % 1 == 0 then
            local countdown = 5 - math.modf(theRacer.arrestTimer)
            if countdown > 0 then
                helper.flashUiMessage((tostring(countdown).."..."), 0.5, true)
            end
        end
        theRacer.arrestTimer = theRacer.arrestTimer + 0.25
    else
        theRacer.arrestTimer = 0
    end
    if theRacer.arrestTimer > 5 then
        helper.flashUiMessage("Busted!", 2, true)
        helper.setAiMode(theRacer.instance.name, "stopping")
        theRacer.arrestTimer = 0
        score = score + 1;
        if score >= totalRacers then
            scenario.finish({msg = "You got them all!"}) --Scenario win trigger and message
        end
        theRacer.state = false
    end
end

local function onScenarioUIReady(state) --Always executes at the scenario introduction
    sceneTimer = 0
    score = 0
    totalRacers = 0
    player = scenetree.findObject("scenario_player0")
    nonPlayers = {scenetree.findObject("scenario_ai0"), scenetree.findObject("scenario_ai1"), scenetree.findObject("scenario_ai2")} --Edit this to match your AI vehicles
    for i, v in ipairs(nonPlayers) do
        racers[i] = Racer:new(nonPlayers[i], true, 0)
        helper.setAiMode(racers[i].instance.name, "flee")
        totalRacers = totalRacers + 1
    end
end

local function onRaceTick(raceTickTime) --Always executes while a scenario is running
    for i, v in ipairs(racers) do
        playerPos = player:getPosition()
        racerPos = racers[i].instance:getPosition()
        racerVel = map.objects[map.objectNames[racers[i].instance.name]].vel:length()
        playerDistance = (playerPos - racerPos):len()
        if racers[i].state then
            if sceneTimer >= 5 and playerDistance <= 50 and racerVel <= 3 then --If: more than 5 seconds post start, within distance, within speed; can be edited
                arrestRacer(racers[i])
            else
                racers[i].arrestTimer = 0
            end
        end
    sceneTimer = sceneTimer + 0.25
    end
end

M.onScenarioUIReady = onScenarioUIReady
M.onRaceTick = onRaceTick

return M