#include <amxmodx>
#include <fakemeta>
#include <dhudmessage>

#define AUTHORS "AciD & tvix1337"

#define INTERVAL 0.1

new bool:szSpeed[33]

new TaskEnt,showspeed,maxplayers

public plugin_init() {
   register_plugin("SpeedMeter", "1337", AUTHORS)
   register_forward(FM_Think, "Think")
   
   TaskEnt = engfunc(EngFunc_CreateNamedEntity, engfunc(EngFunc_AllocString, "info_target"))   
   set_pev(TaskEnt, pev_classname, "speedometer_think")
   set_pev(TaskEnt, pev_nextthink, get_gametime() + 1.01)
   
   register_clcmd("say /speed", "toogleSpeed")
   
   showspeed = register_cvar("sm_enable", "1")
   
   maxplayers = get_maxplayers()
}

public Think(ent)
{
   if(ent == TaskEnt) 
   {
      szSpeedTask()
      set_pev(ent, pev_nextthink,  get_gametime() + INTERVAL)
   }
}

public client_putinserver(id)
{
   szSpeed[id] = showspeed > 0 ? true : false
}

public toogleSpeed(id)
{
   szSpeed[id] = szSpeed[id] ? false : true
   return PLUGIN_HANDLED
}

szSpeedTask()
{
   static i, target
   static Float:velocity[3]
   static Float:vSpeed
   
   for(i=1; i<=maxplayers; i++)
   {
      if(!is_user_connected(i)) continue
      if(!szSpeed[i]) continue
      
      target = pev(i, pev_iuser1) == 4 ? pev(i, pev_iuser2) : i
      pev(target, pev_velocity, velocity)

      vSpeed = floatsqroot(floatpower(velocity[0], 2.0) + floatpower(velocity[1], 2.0))
      
      set_dhudmessage(255, 165, 35, -1.0, 0.7, 0, 0.0, INTERVAL, 0.01, 0.0)
      show_dhudmessage(i, "Sebesseg: %3.2f", vSpeed)
   }
}