getPedOccupiedVehicle [expected element, got nil]

Cronoss · February 22, 2022

I'm trying to connect a "fuel-check" system to a speedometer resource. I know I'm doing something wrong but I can't understand how to get the "vehicle" without using "getPedOccupiedVehicle"... <- I noticed that this is already called in client-side (this is not my resource) I don't know if that's the problem but well, here is the code:

First "getPedOccupiedVehicle" (client-side):

function refreshVehicle()
    vehicle = getPedOccupiedVehicle(player)
end
addEventHandler("onClientRender", root, refreshVehicle)

"getOccupiedVehicle" in server-side Event(check fuel system)

function checkGas()
	veh = getPedOccupiedVehicle(player)
	x,y,z = getElementPosition(veh)
	if (veh) then

Client-side triggering the checkGas function:

function getCarStateColor()
    triggerServerEvent("verGasolina", root)
    if (fuelVeh) then
        local g = (255/1000) * health
        local r = 255 - g
        local b = 0
     
        return r, g, b
    else
        return 0, 255, 0
    end
end

βurak · February 22, 2022

where exactly is the error occurring? can you show the rest of the code?

Cronoss · February 22, 2022

Exactly the console says "line 2, line 3", basically that part

function checkGas()
	veh = getPedOccupiedVehicle(player) --------nil value, expected element
	x,y,z = getElementPosition(veh) -----------error, because "veh" now it's a boolean

after that part, it is just sql requests and validation of "fuel":

function checkGas()
	veh = getPedOccupiedVehicle(player)
	x,y,z = getElementPosition(veh)
	if (veh) then
		local plate = getVehiclePlateText(veh)
		local consulta = exports.mysql:_Query("SELECT * FROM vehicles WHERE plate=?", plate)
		if (consulta) then
			if (#consulta>0) then
				for _,column in ipairs(consulta) do
					ownerGet = tostring(column["owner"])
                	keyOW = tostring(column["keyOW"])
                	break
                end
            end
        end
    	local flcheck = exports.mysql:_Query("SELECT * FROM vehicles WHERE owner=? AND keyOW=?", ownerGet,keyOW)
    		if (flcheck) then
        		if(#flcheck > 0) then
            		for _,column in ipairs(flcheck) do
                		fuelVeh = tonumber(column["fuelCar"])
                		engineVeh = tonumber(column["engineCar"])
                		break
                	end
            	end
        	end

βurak · February 22, 2022

I think the player argument is invalid here, can you show me how to call this function?

Cronoss · February 22, 2022

The end of the "fuelcheck" in server side:

addEvent("verGasolina", true)
addEventHandler("verGasolina", root, checkGas, fuelVeh)

The call in client-side:

function getCarStateColor(fuelVeh)
    triggerServerEvent("verGasolina", root)
    if (fuelVeh) then
        local g = (255/1000) * health
        local r = 255 - g
        local b = 0
     
        return r, g, b
    else
        return 0, 255, 0
    end
end

βurak · February 22, 2022

function checkGas()
	veh = getPedOccupiedVehicle(source) --here
	x,y,z = getElementPosition(veh)
	if (veh) then
		local plate = getVehiclePlateText(veh)
		local consulta = exports.mysql:_Query("SELECT * FROM vehicles WHERE plate=?", plate)
		if (consulta) then
			if (#consulta>0) then
				for _,column in ipairs(consulta) do
					ownerGet = tostring(column["owner"])
                	keyOW = tostring(column["keyOW"])
                	break
                end
            end
        end

can you change the player to source

Cronoss · February 22, 2022

It says "Expected ped at argument 1, got root"

βurak · February 22, 2022

triggerServerEvent("verGasolina", localPlayer)

can you change root to localPlayer

Cronoss · February 22, 2022

It worked And, sorry if this is too much, but I want to ask, what's the problem here?

function getCarStateColor(fuelVeh)
    triggerServerEvent("verGasolina", localPlayer)
    if (fuelVeh) then
        local g = (255/1000) * fuelVeh
        local r = 255 - g
        local b = 0
     
        return r, g, b
    else
        return 0, 255, 0
    end
end

I want to change the color of a icon with the fuelVeh value... I mean, if the fuel it's to low then the icon will turn "red", but it doesn't work properly. (The fuel system works, it turn off the veh if the fuel it's 0 all it's fine, that's why I think the problem it's in the function and not into the fuel-check system)

βurak · February 22, 2022

Can you show me where this function is used. are you using dx as hud? i would like to see them if possible

Edited February 22, 2022 by Burak5312

Cronoss · February 22, 2022

Full client-side [1]:

local smoothedRPMRotation = 0
local vehicleNos = nil
local vehicleRPM = 0


-- 'main stats'
function refreshVehicle()
    vehicle = getPedOccupiedVehicle(player)
end
addEventHandler("onClientRender", root, refreshVehicle)


-- 'vehicle speed'
function getVehicleSpeed()   
    if (vehicle) then
        local vx, vy, vz = getElementVelocity(vehicle)
        
        if (vx) and (vy)and (vz) then
            return math.sqrt(vx^2 + vy^2 + vz^2) * 180 -- km/h
        else
            return 0
        end
    else
        return 0
    end
end


function getVehicleSpeedString() 
    local speedString = math.floor(getVehicleSpeed() + 0.5)
    return string.format("%03d", speedString)
end


-- 'vehicle gear'
function getVehicleGear()    
    if (vehicle) then
        local vehicleGear = getVehicleCurrentGear(vehicle)
        
        return tonumber(vehicleGear)
    else
        return 0
    end
end


function getFormattedVehicleGear()
    local gear = getVehicleGear()
    local rearString = "R"
    
    if (gear > 0) then
        return gear
    else
        return rearString
    end
end


-- 'vehicle rpm'
function getVehicleRPM() 
    if (vehicle) then   
        if (isVehicleOnGround(vehicle)) then
            isVehicleInStunt = "false"
           
            if (getVehicleEngineState(vehicle) == true) then
                if(getVehicleGear() > 0) then
                    vehicleRPM = math.floor(((getVehicleSpeed()/getVehicleGear())*180) + 0.5)
                    
                    if (vehicleRPM < 650) then
                        vehicleRPM = math.random(650, 750)
                    elseif (vehicleRPM >= 9800) then
                        vehicleRPM = 9800
                    end
                else
                    vehicleRPM = math.floor(((getVehicleSpeed()/1)*180) + 0.5)
                    
                    if (vehicleRPM < 650) then
                        vehicleRPM = math.random(650, 750)
                    elseif (vehicleRPM >= 9800) then
                        vehicleRPM = 9800
                    end
                end
            else
                vehicleRPM = 0
            end
        else
            isVehicleInStunt = "true"
            
            if (getVehicleEngineState(vehicle) == true) then
                vehicleRPM = vehicleRPM - 150
                    
                if (vehicleRPM < 650) then
                    vehicleRPM = math.random(650, 750)
                elseif (vehicleRPM >= 9800) then
                    vehicleRPM = 9800
                end
            else
                vehicleRPM = 0
            end
        end
        
        return tonumber(vehicleRPM)
    else
        return 0
    end
end


function getRPMRoation()
 
    if (getVehicleRPM()) and (getVehicleRPM() >= 0) then
    local rpmRotation = math.floor(((270/9800)* getVehicleRPM()) + 0.5)
        
        if (smoothedRPMRotation < rpmRotation) then
            smoothedRPMRotation = smoothedRPMRotation + 2
        end
        
        if (smoothedRPMRotation > rpmRotation) then
            smoothedRPMRotation = smoothedRPMRotation - 2
        end
        
        return tonumber(smoothedRPMRotation)
    else
        return 0
    end   
end


function getFormattedRpmRotation()
    local rpm = getRPMRoation()
    local rpm1 = rpm
    local rpm2 = rpm
    local rpm3 = rpm
    local rpm4 = rpm
    
    if (rpm1 >= 90) then
        rpm1 = 90
    elseif (rpm1 < 0) then
        rpm1 = 0
    end
    
    if (rpm2 >= 180) then
        rpm2 = 180
    elseif (rpm2 < 0) then
        rpm2 = 0
    end
    
    if (rpm3 >= 219) then
        rpm3 = 219
    elseif (rpm3 < 0) then
        rpm3 = 0
    end
        
    if (rpm4 >= 360) then
        rpm4 = 360
    elseif (rpm4 < 0) then
        rpm4 = 0
    end
    
    return rpm1, rpm2, rpm3, rpm4
end


function getCarStateColor(fuelVeh)
    triggerServerEvent("verGasolina", localPlayer)
    if (fuelVeh) then
        local g = (255/100.0000) * fuelVeh
        local r = 255 - g
        local b = 0
     
        return r, g, b
    else
        return 0, 255, 0
    end
end


function getNitroStateColor()   
    local nitro = getVehicleUpgradeOnSlot(vehicle, 8)
     
    if (nitro > 0) then
        return 0, 255, 0
    else
        return 75, 75, 75
    end
end

Full client-side [2] (HUD):

local screenWidth, screenHeight = guiGetScreenSize()

-- 'Textures'
local speedometerBG = "textures/speedometerBG.png"
local speedometerBG2 = "textures/speedometerBG2.png"
local speedometerNeedleWhite = "textures/speedometerNeedleWhite.png"
local speedometerNeedleRed = "textures/speedometerNeedleRed.png"
local speedometerOverlay = "textures/speedometerOverlay.png"
local speedometerGlass = "textures/speedometerGlass.png"
local carState = "textures/carState.png"
local nitroState ="textures/nitroState.png"

-- 'fonts'
fontPrototype10 = dxCreateFont("fonts/Prototype.ttf", 10)
fontPrototype40 = dxCreateFont("fonts/Prototype.ttf", 40)
fontLCD22 = dxCreateFont("fonts/lcd.ttf", 22)


function speedoMeterGUI() 
    if (vehicle) then 
        local rpm1, rpm2, rpm3, rpm4 = getFormattedRpmRotation()
        -- 'Speedometer'
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerBG)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerNeedleRed, rpm4)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerNeedleWhite, rpm3)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerNeedleWhite, rpm2)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerNeedleWhite, rpm1)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerBG2)
        dxDrawText(getFormattedVehicleGear(), screenWidth - 160, screenHeight - 170, screenWidth - 160, screenHeight - 170, tocolor(255, 255, 255, 255), 1, fontPrototype40, "left", "top", false, false, false)
        dxDrawText("OOO", screenWidth - 160, screenHeight - 115, screenWidth - 160, screenHeight - 115, tocolor(25, 25, 25, 255), 1, fontLCD22, "left", "top", false, false, false)
        dxDrawText("***", screenWidth - 160, screenHeight - 115, screenWidth - 160, screenHeight - 115, tocolor(25, 25, 25, 255), 1, fontLCD22, "left", "top", false, false, false)
        dxDrawText(getVehicleSpeedString(), screenWidth - 160, screenHeight - 115, screenWidth - 160, screenHeight - 115, tocolor(255, 255, 255, 255), 1, fontLCD22, "left", "top", false, false, false)
        dxDrawText("km/h", screenWidth - 110, screenHeight - 95, screenWidth - 110, screenHeight - 95, tocolor(255, 255, 255, 255), 1, fontPrototype10, "left", "top", false, false, false)
        local nsr, nsg, nsb = getNitroStateColor()
        dxDrawImage(screenWidth - 108, screenHeight - 155, 24, 24, nitroState, 0, 0, 0, tocolor(nsr, nsg, nsb, 255), true)
        local csr, csg, csb = getCarStateColor()
        dxDrawImage(screenWidth - 108, screenHeight - 125, 24, 24, carState, 0, 0, 0, tocolor(csr, csg, csb , 255), true)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerOverlay)
        dxDrawImage(roundValue(screenWidth - 270), roundValue(screenHeight - 270), 200, 200, speedometerGlass)
    end
end
addEventHandler("onClientRender", root, speedoMeterGUI)

Function (in server-side):

function checkGas()
	veh = getPedOccupiedVehicle(source)
	x,y,z = getElementPosition(veh)
	if (veh) then
		local plate = getVehiclePlateText(veh)
		local consulta = exports.mysql:_Query("SELECT * FROM vehicles WHERE plate=?", plate)
		if (consulta) then
			if (#consulta>0) then
				for _,column in ipairs(consulta) do
					ownerGet = tostring(column["owner"])
                	keyOW = tostring(column["keyOW"])
                	break
                end
            end
        end
    	local check = exports.mysql:_Query("SELECT * FROM vehicles WHERE owner=? AND keyOW=?", ownerGet,keyOW)
    		if (check) then
        		if(#check > 0) then
            		for _,column in ipairs(check) do
                		fuelVeh = (column["fuelofcar"]) ---------The "fuelveh" gets the table value representing the fuel of the vehicle 
                		motor = tonumber(column["motor"])
                		break
                	end
            	end
        	end
        if (fuelVeh <= 0) then --------works, if fuelVeh 0 or less, then the vehicle turn off
        	setVehicleEngineState(veh, false)
        	mot = 0 ------new value to update
        	local sendF = exports.mysql:_Query("UPDATE vehicles SET motor=? WHERE owner=? AND keyOW=?",mot,ownerGet,keyOW)
        end
        vehMove() --------function 
    end
end
addEvent("verGasolina", true)
addEventHandler("verGasolina", root, checkGas, fuelVeh)

function vehMove()
	local fx,fy,fz = x+0.5, y+0.5,z+0.5
	local fuelConsumption = 0.005
	
	if (veh) then
		if (fuelVeh) then
            distance = getDistanceBetweenPoints3D(x,y,z,fx,fy,fz)
            enginePlus = 0
            if getVehicleEngineState(veh) then
                enginePlus = 0.08
            end
            local newFuel = (fuelVeh - (fuelConsumption*(distance+enginePlus)))
            local sendFuel = exports.mysql:_Query("UPDATE vehicles SET gasolina=? WHERE owner=? AND keyOW=?",newFuel,ownerGet,keyOW)
        else
            if (fuelVeh) then ---I think I messed up here
                fuelNew = (fuelVeh)
            else
                fuelVeh = 100
            end
        end
    end
end

Edit = I added the hud part

Edited February 22, 2022 by Cronoss

βurak · February 22, 2022

getCarStateColor takes fuel parameter but no parameter in onClientRender event

getCarStateColor(fuelVeh)

local csr, csg, csb = getCarStateColor()

maybe this issue can be fixed if you pass vehicle fuel status into onClientRender event

Cronoss · February 22, 2022

How could i pass that parameter, triggering the server event in this?

function refreshVehicle(fuelVeh)
    vehicle = getPedOccupiedVehicle(player)
  -----------trigger blabla
end
addEventHandler("onClientRender", root, refreshVehicle)

βurak · February 22, 2022

In fact, there is a very bad situation that I noticed in this resource, and that is this.

Running triggerServerEvent per frame inside onClientRender event

It will cause the server to consume a very large network connection and cause bad optimization of the server, so it is a very critical situation.

so I suggest you delete this line

function getCarStateColor(fuelVeh)
    --triggerServerEvent("verGasolina", localPlayer) -- <-- this
    if (fuelVeh) then
        local g = (255/100.0000) * fuelVeh
        local r = 255 - g
        local b = 0
     
        return r, g, b
    else
        return 0, 255, 0
    end
end

local csr, csg, csb = getCarStateColor() -- <-- this

for fuel maybe you can use setElementData

setElementData(veh, "Fuel", column["fuelofcar"]) --Create a key named "Fuel" and export the information from the database

on client side use getElementData to get it

getElementData(vehicle, "Fuel")

Edited February 22, 2022 by Burak5312

Cronoss · February 22, 2022

I understand the solution, but how I could make the "fuel" start to "decrease" if that event it's not added?

edit: I mean the fuel-system, it starts to decrease when the player starts moving with the vehicle or/and the engine it's on

Edited February 22, 2022 by Cronoss

βurak · February 22, 2022

if you want to run this event you can do it with setTimer

For example you set the timer to 1 second, on the client side you then pass the triggerServerEvent to this timer this is better than calling it during every frame

Edited February 22, 2022 by Burak5312

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