forward GetClosestCar(playerid);
forward GetDistanceToCar(playerid,carid);

public GetClosestCar(playerid){ //By Darkrealm (Edited by Gamer_Z for AtachVehToVeh)
	if (!IsPlayerConnected(playerid)){
	  return -1;
	}
	new Float:prevdist = 20.000;
	new prevcar;
	for (new carid = 0; carid < MAX_VEHICLES; carid++){
	  if(!IsVehicleInUse(carid)){
	 		new Float:dist = GetDistanceToCar(playerid,carid);
		  	if ((dist < prevdist)){
		    prevdist = dist;
		    prevcar = carid;
      	}
  		}
	}
	return prevcar;
}

public GetDistanceToCar(playerid,carid){ //By Darkrealm (Edited by Gamer_Z for AtachVehToVeh)
	new Float:dis;
	new Float:x1,Float:y1,Float:z1,Float:x2,Float:y2,Float:z2;
	if (!IsPlayerConnected(playerid)) {
	return -1;
	}
	GetPlayerPos(playerid,x1,y1,z1);
 	if(!IsVehicleInUse(carid)){
		GetVehiclePos(carid,x2,y2,z2);
		dis = floatsqroot(floatpower(floatabs(floatsub(x2,x1)),2)+floatpower(floatabs(floatsub(y2,y1)),2)+floatpower(floatabs(floatsub(z2,z1)),2));
		return floatround(dis);
	}else{
 		return SendClientMessage(playerid,0xFF0000FF,"ERROR");//debug
	}
}

IsVehicleInUse(vehicleid){//By Luby ..IsVehicleInUseDF xD
	new temp;
	for(new i=0;i<200;i++){
		if(IsPlayerConnected(i) && IsPlayerInVehicle(i, vehicleid) && GetPlayerState(i)==PLAYER_STATE_DRIVER){
			temp++;
		}
	}
	if(temp > 0){ return true; } else return false;
}