Towtruck

// © 2013 Sydcul. All rights reserved. http://www.sydcul.com
// Designed for SA-MP 0.3x - will not work in versions prior to 0.3c R3 (GetVehicleDistanceFromPoint)
// You need to put "native IsValidVehicle(vehicleid);" in your a_samp.inc Or uncomment the line below. Not both.
//native IsValidVehicle(vehicleid);
#include <a_samp>

#define HOLDING(%0) \
    ((newkeys & (%0)) == (%0))
#define PRESSED(%0) \
    (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))
#define RELEASED(%0) \
    (((newkeys & (%0)) != (%0)) && ((oldkeys & (%0)) == (%0)))

public OnFilterScriptInit()
{
    print("Towtruck v1.0 by Sydcul");
    return 1;
}

public OnFilterScriptExit()
{
    return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    new vehicle = GetPlayerVehicleID(playerid);
    new model = GetVehicleModel(vehicle);
    new targetVehicle, Float:targetVehicleDistance, closestVehicle, Float:closestVehicleDistance = 7.0, found = 0;
    new Float:tX, Float:tY, Float:tZ;
    if ((GetPlayerState(playerid) == PLAYER_STATE_DRIVER) && PRESSED(KEY_ACTION) && (model == 525 || model == 531)) { // Player presses TAB, and the current vehicle is a towtruck / tractor
        while(targetVehicle < MAX_VEHICLES) {
            GetVehiclePos(targetVehicle, tX, tY, tZ);
            targetVehicleDistance = GetVehicleDistanceFromPoint(vehicle, tX, tY, tZ);
            if(IsValidVehicle(targetVehicle) && (floatcmp(targetVehicleDistance, 7.0) <= 0) && (targetVehicle != vehicle) && (floatcmp(targetVehicleDistance, closestVehicleDistance) <= 0)) { //deze conditie is 2000x goed, dus client overload met berichten
                found = 1;
                closestVehicle = targetVehicle;
                closestVehicleDistance = targetVehicleDistance;
            }
            targetVehicle++;
        }
        if(found) {
            if  (IsTrailerAttachedToVehicle(vehicle))
            {
                DetachTrailerFromVehicle(vehicle);
            }
            AttachTrailerToVehicle(closestVehicle, vehicle);
        }
    }
    return 1;
}