#define NameTagDistance 30.0
new StreamID[MAX_PLAYERS char][MAX_PLAYERS char];
public OnGameModeInit()
{
     SetNameTagDrawDistance(NameTagDistance);
     SetTimer("CheckRadiusPlayer", 1000, 1);
     return 1;
}
public OnPlayerStreamIn(playerid, forplayerid)
{
     StreamID[playerid][forplayerid] = 1;
     StreamID[forplayerid][playerid] = 1;
     return 1;
}
public OnPlayerStreamOut(playerid, forplayerid)
{
     StreamID[playerid][forplayerid] = 0;
     StreamID[forplayerid][playerid] = 0;
     return 1;
}
forward CheckRadiusPlayer();
public CheckRadiusPlayer()
{
     new Float:x, Float:y, Float:z;
     for(new i = GetMaxPlayers() - 1; i != -1; i--)
     {
         if(!IsPlayerConnected(i) || IsPlayerNPC(i)) continue;
         for(new j = GetMaxPlayers() - 1; j != -1; j--)
         {
             if(!IsPlayerConnected(j) || IsPlayerNPC(j) || StreamID[i][j] == 0 || StreamID[j][i] == 0) continue;
             GetPlayerPos(j, x, y, z);
             if(IsPlayerInRangeOfPoint(i, NameTagDistance, x, y, z))
             {
                 ShowPlayerNameTagForPlayer(playerid, forplayerid, 1);
                 ShowPlayerNameTagForPlayer(forplayerid, playerid, 1);
                 SetPlayerMarkerForPlayer(i, j, GetPlayerColor(j) & 0xFFFFFF00);
                 SetPlayerMarkerForPlayer(j, i, GetPlayerColor(i) & 0xFFFFFF00);
             }
             else
             {
                 ShowPlayerNameTagForPlayer(playerid, forplayerid, 0);
                 ShowPlayerNameTagForPlayer(forplayerid, playerid, 0);
                 SetPlayerMarkerForPlayer(i, j, GetPlayerColor(j) | 0x000000FF);
                 SetPlayerMarkerForPlayer(j, i, GetPlayerColor(i) | 0x000000FF);
             }
         }
     }
     return 1;
}

public OnPlayerUpdate(playerid)
{
     new Float:x, Float:y, Float:z;
     for(new i = GetMaxPlayers() - 1; i != -1; i--)
     {
         if(!IsPlayerConnected(i) || IsPlayerNPC(i) || StreamID[i][playerid] == 0 || StreamID[playerid][i] == 0) continue;
         GetPlayerPos(i, x, y, z);
         if(IsPlayerInRangeOfPoint(playerid, NameTagDistance, x, y, z))
         {
             ShowPlayerNameTagForPlayer(playerid, i, 1);
             ShowPlayerNameTagForPlayer(i, playerid, 1);
             SetPlayerMarkerForPlayer(i, playerid, GetPlayerColor(playerid) & 0xFFFFFF00);
             SetPlayerMarkerForPlayer(playerid, i, GetPlayerColor(i) & 0xFFFFFF00);
         }
         else
         {
             ShowPlayerNameTagForPlayer(playerid, i, 0);
             ShowPlayerNameTagForPlayer(i, playerid, 0);
             SetPlayerMarkerForPlayer(i, playerid, GetPlayerColor(playerid) | 0x000000FF);
             SetPlayerMarkerForPlayer(playerid, i, GetPlayerColor(i) | 0x000000FF);
         }
     }
     return 1;
}