toribio

//no topo:
new barreira[MAX_PLAYERS][10]; //10 barreiras por jogador
new barcount[MAX_PLAYERS];

//comandos:
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 < sizeof barreira[playerid]; i++)
        {
            if(!barreira[playerid])
            {
                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 destru�-la.", barreiraid, barreiraid);
        SendClientMessage(playerid, 0xFF0000AA, string);
        barcount[playerid]++;
    } else {
        SendClientMessage(playerid, 0xFF0000AA, "Voc� j� 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 n�o criada!");
        }
    } else {
        SendClientMessage(playerid, 0xFF0000AA, "ID de barreiras entre 0 e 9!");
    }
    return 1;
}

//no OnPlayerDisconnect:
for(new i; i < sizeof barreira[playerid]; i++)
{
    if(barereira[playerid][i])
        DestyroyObject(barereira[playerid][i]);
    barereira[playerid][i] = 0;
}
barrcount[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));
}