[ItsRobinson]

Use Phreak's code above to create the trailers, once you've created the trailers,
under OnPlayerUpdate,

Код:

if(GetVehicleTrailer(vID) == ID_trailer[0]) //trailer 1 (ls)
{
		ShowPlayerDialog(playerid, /*MISSION_1*/997, DIALOG_STYLE_MSGBOX, "INFO", "Point: Shop LS\nPrize: 5000$", "Yes", "No");

}
else if(GetVehicleTrailer(vID) == ID_trailer[1]) //trailer 2 lv
{
		ShowPlayerDialog(playerid, /*MISSION_2*/998, DIALOG_STYLE_MSGBOX, "INFO", "Point: Shop LV\nPrize: 5000$", "Yes", "No");

}
else if(GetVehicleTrailer(vID) == ID_trailer[3]) //trailer 3 sf
{
		ShowPlayerDialog(playerid, /*MISSION_3*/999, DIALOG_STYLE_MSGBOX, "INFO", "Point: Shop SF\nPrize: 5000$", "Yes", "No");

}

If you wanna add the label to the trailers just use Attach3DTextLabelToVehicle under OnGameModeInit (or wherever you create the trailers)

Then under OnDialogResponse it will simply look something like this

Код:

if(dialogid == 999 && response)
{
        SetPlayerCheckpoint(playerid, /*x, y, z, size*/);
        SetPVarInt(playerid, "trucking", 1);
}

and then the event that happens when the player enters the destination under OnPlayerEnterCheckpoint

Код:

if(GetPVarInt(playerid, "trucking") == 1)
{
      DeletePVar(playerid, "trucking");
      SendClientMessage(playerid, 1, "Congratulations");
      //whatever else you wanna do
}

Give it ago, if you get stuck, ask for some more help.

(not tested any of this, but it will most likely work)