getDistance Trailer and Vehicle

[Stijger]

Hello again,

Apparently I really suck at scripting, so i need your help again guys.

I got this code, and what I want is if the trailer and truck get to far from eachother on trailerdetach

(so on like big high speed crash) they blow up.

function trailerGone ( theTruck ) 
    theTruckVehicle = theTruck 
    theTruckTrailer = source 
    trailerx, trailery, trailerz = getElementPosition(source) 
    vehiclex, vehicley, vehiclez = getElementPosition (theTruckVehicle) 
    outputChatBox ("X coordinate of trailer is " ..trailerx) 
    outputChatBox ("X coordinate of vehicle is " ..vehiclex) 
    dist = getDistanceBetweenPoints2D (vehiclex, vehicley, trialerx, trailery) 
    if(getDistanceBetweenPoints2D (vehiclex, vehicley, trialerx, trailery) <= 20) then 
        blowVehicle ( theTruckVehicle ) 
        blowVehicle ( theTruckTrailer ) 
    end 
end 
addEventHandler( "onTrailerDetach", getRootElement(), trailerGone ) 
  

Gives these errors:

WARNING: race-convoytrucking\trailerattach.lua:8: Bad argument @ 'getDistanceBetweenPoints2D'

WARNING: race-convoytrucking\trailerattach.lua:9: Bad argument @ 'getDistanceBetweenPoints2D'

ERROR: race-convoytrucking\trailerattach.lua:9: attempt to compare boolean with number

Now the problem is, I get a bad argument on the trailerx when

it's compared to the vehiclex. (same with the y coordinates i guess)

the outputbox trailerx and vehiclex is working fine thou, so why doesn't it work in the getDistanceBetweenPoints2D?

edit: the source and theTruckTrailer part I switched already, don't make any difference.

[Kenix]

function trailerGone ( uTruck ) 
    local trailerx, trailery, _ = getElementPosition( source ) 
    local vehiclex, vehicley, _ = getElementPosition ( uTruck ) 
    outputChatBox ( "X coordinate of trailer is " .. tostring( trailerx ) ) 
    outputChatBox ( "X coordinate of vehicle is " .. tostring( vehiclex ) ) 
    local dist = getDistanceBetweenPoints2D ( vehiclex, vehicley, trailerx, trailery ) 
    if dist <= 20 then 
        blowVehicle ( uTruck ) 
        blowVehicle ( source ) 
    end 
end 
addEventHandler( "onTrailerDetach", root, trailerGone ) 
  

Because you use not defined variable trialerx in 9 line.

[Stijger]

Thank you so much, it works.

so that tostring turns my variable into a string??

Cause i read something about it, but didn't quite understand it.

[Kenix]

No problem.

In old version mta server/client outputChatBox/outputDebugString not convert all variables to string.

You need use tostring in function outputChatBox/outputDebugString for convert variables to string.

If you not convert, it return false and bad argument and not output.

[Stijger]

Hey,

I need some help again.

Iam still working on the trailer distance thing,

but now i thought well wouldn't it be more awesome

if you can dettach the trailer, but when you get too far from it,

you blow up.

So something like that checks the distance between the two vehicles

a lot and then when you get too far, it goes BOOM!!

Tried this but it don't remember the trailer after the dettachment.

root = getRootElement () 
function attachedTrailer () 
    local theTruckVehicle = getPedOccupiedVehicle ( getLocalPlayer () ) 
    local theTruckTrailer = getVehicleTowedByVehicle ( theTruckVehicle ) 
    local vehiclex, vehicley, vehiclez = getElementPosition (theTruckVehicle) 
    local trailerx, trailery, trailerz = getElementPosition(theTruckTrailer) 
    local dist = getDistanceBetweenPoints2D (trailerx, trailery, vehiclex, vehicley) 
    if dist >= 20 then 
        blowVehicle ( theTruckVehicle ) 
        blowVehicle ( theTruckTrailer ) 
    end 
end 
addEventHandler ( "onClientRender", root, attachedTrailer ) 

[Castillo]

That must be because you're using getVehicleTowedByVehicle, after you detach it, the function will return nothing, because you no longer have a trailer attached.

[Stijger]

Any idea how i should get the towed vehicle then?

Coz I have no idea. The player vehicle is no problem ofcourse.

[Castillo]

What you're trying to do is to check if the vehicle is far from the trailer, that means the trailer is no longer attached, so you'll have to check the trailer, you can't get the "attached" trailer because there isn't.

[Stijger]

yeah I get that, but how should i get it then.

Any suggestions?

[Castillo]

You could set a ID to the trailer, e.g the player serial then get the element by the ID using: getElementByID.

[Stijger]

hmm okay good idea, thank you again Castillo.

I will try that and maybe get back on it

[Castillo]

You're welcome .