toribio

//topo:
new barreira[MAX_PLAYERS][10]; //10 barreiras por jogador
new barcount[MAX_PLAYERS];

//no OnPlayerCommandText:
    if(!strcmp(cmdtext, "/barreira", true))
    {
        new Float:x, Float:y, Float:z, Float:a, string[128], barreiraid;
        if(barcount[playerid] < 10)
        {
            GetPlayerPos(playerid, x, y, z);
            GetPlayerFacingAngle(playerid, a);
            GetXYInFrontOfPlayer(playerid, x, y, 1.0);
            for(new i; i < 10; i++)
            {
                if(!barreira[playerid][i])
                {
                    barreiraid = i;
                    break;
                }
            }
            barreira[playerid][barreiraid] = CreateObject(981, x, y,z, 0.0, 0.0, a);
            format(string, sizeof string, "ID dessa barreira: %d; Use \"/dbarreira %d\" para destruí-la.", barreiraid, barreiraid);
            SendClientMessage(playerid, 0xFF0000AA, string);
            barcount[playerid]++;
        } else {
            SendClientMessage(playerid, 0xFF0000AA, "Você já criou 10 barreiras, destrua uma com /dbarreira");
        }
        return 1;
    }

    if(!strcmp(cmd, "/dbarreira", true))
    {
        new tmp[256], barreiraid;
        tmp = strtok(cmdtext, idx);
        if(!strlen(tmp))
            return SendClientMessage(playerid, 0xFFFFFFAA, "USE: /dbarreira [id_barreira]");
        barreiraid = strval(tmp);
        if(0 <= barreiraid < 10)
        {
            if(barreira[playerid][barreiraid])
            {
                DestroyObject(barreira[playerid][barreiraid]);
                barreira[playerid][barreiraid] = 0;
                barcount[playerid]--;
            } else {
                SendClientMessage(playerid, 0xFF0000AA, "ID de barreira não criada!");
            }
        } else {
            SendClientMessage(playerid, 0xFF0000AA, "ID de barreiras entre 0 e 9!");
        }
        return 1;
    }


//no OnPlayerDisconnect
    for(new i; i < 10; i++)
    {
        if(barreira[playerid][i])
            DestroyObject(barreira[playerid][i]);
        barreira[playerid][i] = 0;
    }
    barcount[playerid] = 0;

//no fim do mode:
stock GetXYInFrontOfPlayer(playerid, &Float:x, &Float:y, Float:distance)
{   // Created by Y_Less

    new Float:a;

    GetPlayerPos(playerid, x, y, a);
    GetPlayerFacingAngle(playerid, a);

    if (GetPlayerVehicleID(playerid)) {
        GetVehicleZAngle(GetPlayerVehicleID(playerid), a);
    }

    x += (distance * floatsin(-a, degrees));
    y += (distance * floatcos(-a, degrees));
}