#include <a_samp>
#define KEY_AIM (128)

forward GetClosestPlayer(p1);
public GetClosestPlayer(p1)
{
    new x,Float:dis,Float:dis2,player;
    player = -1;
    dis = 99999.99;
    for (x=0;x<MAX_PLAYERS;x++)
    {
        if(IsPlayerConnected(x))
        {
            if(x != p1)
            {
                dis2 = GetDistanceBetweenPlayers(x,p1);
                if(dis2 < dis && dis2 != -1.00)
                {
                    dis = dis2;
                    player = x;
                }
            }
        }
    }
    return player;
}

forward Float:GetDistanceBetweenPlayers(p1,p2);
public Float:GetDistanceBetweenPlayers(p1,p2)
{
    new Float:x1,Float:y1,Float:z1,Float:x2,Float:y2,Float:z2;
    if(!IsPlayerConnected(p1) || !IsPlayerConnected(p2))
    {
        return -1.00;
    }
    GetPlayerPos(p1,x1,y1,z1);
    GetPlayerPos(p2,x2,y2,z2);
    return floatsqroot(floatpower(floatabs(floatsub(x2,x1)),2)+floatpower(floatabs(floatsub(y2,y1)),2)+floatpower(floatabs(floatsub(z2,z1)),2));
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    new Float:health;
    if(newkeys & KEY_AIM)
       {
        if(gTeam[playerid] == TEAM_CT)
        {
            new victimid = GetClosestPlayer(playerid);
            GetPlayerHealth(victimid, health);
            if(gTeam[victimid] == TEAM_T)
            {
                if(GetDistanceBetweenPlayers(playerid,victimid) < 2)
                {
                    SetPlayerHealth(victimid, health - 9.0);
		    SetTimerEx("bite", 3000, false, "is", 1337, "");
                    GameTextForPlayer(victimid, "~p~YOU BITED A HUMAN !", 1000, 3);
                    PlayerPlaySound(playerid, 1136, 0, 0, 0);
                    PlayerPlaySound(victimid, 1136, 0, 0, 0);
                }
            }
        }
    }
    return 1;
}

forward bite(second, msg[]);
public bite(second, msg[])
{
    printf("%i NOW YOU CAN BITE AGAIN !: %s", second, msg);
    return 1;
}