#include <sourcemod>
#include <sdktools>
#include <cstrike>

#define PLUGIN_VERSION   "1.1"

public Plugin:myinfo =
{
  name = "Show nickname on HUD",
  author = "Graffiti",
  description = "Show nickname on HUD for CSGO",
  version = PLUGIN_VERSION,
  url = "http://www.sourcemod.net/"
};

public OnPluginStart()
{
  CreateConVar("sm_show_nickname_on_hud_version", PLUGIN_VERSION, "Show nickname on HUD", FCVAR_PLUGIN | FCVAR_SPONLY | FCVAR_DONTRECORD | FCVAR_NOTIFY);
  CreateTimer(0.5, Timer, _, TIMER_REPEAT);
}

stock TraceClientViewEntity(client)
{
  new Float:m_vecOrigin[3];
  new Float:m_angRotation[3];

  GetClientEyePosition(client, m_vecOrigin);
  GetClientEyeAngles(client, m_angRotation);

  new Handle:tr = TR_TraceRayFilterEx(m_vecOrigin, m_angRotation, MASK_VISIBLE, RayType_Infinite, TRDontHitSelf, client);
  new pEntity = -1;

  if (TR_DidHit(tr))
  {
   pEntity = TR_GetEntityIndex(tr);
   CloseHandle(tr);
   return pEntity;
  }

  if(tr != INVALID_HANDLE)
  {
   CloseHandle(tr);
  }
   
  return -1;
}

public bool:TRDontHitSelf(entity, mask, any:data)
{
  return (1 <= entity <= MaxClients && entity != data);  
}

public Action:Timer(Handle:timer)
{
  for(new i = 1; i <= MaxClients; i++)
  {
   if (IsClientInGame(i))
   {
    new target = TraceClientViewEntity(i);
    if(target > 0 && target <= MaxClients && IsClientInGame(target) && IsPlayerAlive(target) && i != target)
    {
     PrintHintText(i, "\"%N\"", target);
    }
   }
  }
  return Plugin_Continue;  
}