public OnPlayerSpawn(playerid)
{
    SetPlayerHealth(playerid, 9999999);
    SetPlayerTeam(playerid, 0);
    return 1;
}

forward SetPlayerHealthEx(playerid,Float:hp,reason = 0,Float:amount = 0.0);
stock SetPlayerHealthEx(playerid,Float:hp,reason = 0,Float:amount = 0.0)
{
    new Float:oldhp = GetPlayerHealthEx(playerid);

    if(hp <= 0.0)
    {
        SetPlayerHealth(playerid,0);
        hp = 0.0;
    }

    if(reason != 18 && reason != 37)
        hp = float(floatround(hp,floatround_floor));

    SetPVarFloat(playerid,"ScriptHealth",hp);
    //insert here any hud function you have to update player HP
    return 1;
}

forward SetPlayerArmourEx(playerid,Float:armour,reason = 0);
stock SetPlayerArmourEx(playerid,Float:armour,reason = 0)
{
        if(armour < 0.0)
        armour = 0.0;

        if(reason != 18 && reason != 37)
            armour = float(floatround(armour,floatround_floor));

    SetPlayerArmour(playerid,armour);
    SetPVarFloat(playerid,"ScriptArmour",armour);
    // insert here any hud function you have to update player's armor
    return 1;
}

forward Float:GetPlayerHealthEx(playerid);
stock Float:GetPlayerHealthEx(playerid)
{
    return GetPVarFloat(playerid, "ScriptHealth");
}

forward Float:GetPlayerArmourEx(playerid);
stock Float:GetPlayerArmourEx(playerid)
{
    return GetPVarFloat(playerid, "ScriptArmour");
}


// function example taken from my TF2 (removed specific mode parts) Gamemode
// This does not include armor calculations as armor is not in the GM but they are easily done

forward DamagePlayer(playerid, Float:amount, weaponid, Float:hp, Float:armour, issuerid);
public DamagePlayer(playerid, Float:amount, weaponid, Float:hp, Float:armour, issuerid)
{
        //33% Less damage from explosions to Demos & Soldiers
    //25% resistance for rockets to Soldiers
    //66% Fall damage reduced for Scouts
    //100% Fire damage reduced for Pyros
    //100% damage resistance while round warmup
    //10% fire resistance to medic

        //100% - amount
    //toremove%  - x
    //formula: (toremove * amount) / 100

    if(amount == 0.0)
        return 1;

    if( (weaponid == 18 || weaponid == 37) && GetPlayerClassEx(playerid) == PYRO)
        return 1; // This means fire damage wont affect you if you're a PYRO

    if(GetPVarInt(playerid,"OnSpawn") == 1 || GetPlayerTeamEx(playerid) == GetPlayerTeamEx(issuerid))
            return 1; //ignore all damage if on spawn or same team
        if(MissionInfo[Mission_Warming] != 999)
            return 1; //ignore all damage if mission hasn't started


    if(weaponid == 5 || weaponid == 8 || weaponid == 6 || weaponid == 2 || weaponid == 1)
            amount = amount+40.0; //Melees damage +40
    if(weaponid == 22) // Pistol
            amount = amount-((50.0*amount)/100.0); //pistol damage reduced by 50%
    if(weaponid == 24) // Deagle
            amount = amount-((50.0*amount)/100.0); //deagle damage reduced by 50%
    if(weaponid == 25) // Shotgun
            amount = amount+((25.0*amount)/100.0); //shotgun damage increased 25%
    if(weaponid == 38 && GetPlayerClassEx(issuerid) != MEDIC) // Minigun
            amount = amount-((95.0*amount)/100.0); //minigun damage decreased 95%
    if(weaponid == 35 || weaponid == 51) //RPG/Explosion
            amount = amount+((20.0*amount)/100.0); //Explosions damage increased 20%
    if(weaponid == 26) //Sawnoff
            amount = amount-((5.0*amount)/100.0); // Sawnoff damage decreased 5%
    if(weaponid == 34) //Sniper rifle
            amount = amount+((110.0*amount)/100.0); //sniper damage increased 110%
    if(weaponid == 23) //Silenced
            amount = 35; // Silenced damage to 35hp
    if(weaponid == 37) //Flame
            amount =  amount+((5.0*amount)/100.0); // flame thrower initial damage +5%
        if(weaponid == 18) //Mooltovs
            amount =  amount-((90.0*amount)/100.0); // molotov damage -90%
        if(weaponid == 31) //M4
            amount =  amount+((25.0*amount)/100.0); //m4 damage +25%
        if(weaponid == 42) //Fire ex
            amount =  amount-((40.0*amount)/100.0); //fire ex damage -40%
        if(weaponid == 8 && GetPlayerClassEx(issuerid) == DEMOMAN) //Demoman
            amount =  amount*2; //Double damage for demoman & katana

        if( (weaponid == 18 || weaponid == 37) && GetPlayerClassEx(playerid) == MEDIC)
            amount =  amount-((10.0*amount)/100.0); //10% Fire Resistance for medics
        if( (weaponid == 51 || weaponid == 35 || weaponid == 16 || weaponid == 39))
            if(GetPlayerClassEx(playerid) == SOLDIER || GetPlayerClassEx(playerid) == DEMOMAN)
            amount =  amount-((66.0*amount)/100.0); //Blast Resistance for soldier & demoman
        if( weaponid == 54 && GetPlayerClassEx(playerid) == SCOUT)
            amount =  amount-((66.0*amount)/100.0); //-66% fall damage for scouts



    hp = hp-amount;
        SetPlayerHealthEx(playerid, hp, weaponid, amount);
    return 1;
}


// another damageplayer example without reductions but armour calculations

//playerid, amount of damage, weaponid of damage, current player HP, current player armor
forward DamagePlayer(playerid, Float:amount, weaponid, Float:hp, Float:armour);
public DamagePlayer(playerid, Float:amount, weaponid, Float:hp, Float:armour)
{
        if(weaponid == 41 || weaponid == 42) //spray
        amount = amount-((25.0*amount)/100.0);

    if(weaponid != 54 && weaponid != 53)
    {
        if(armour > 0.0)
        {
                new Float:tmp = armour;
            tmp = tmp-amount;
                if(tmp < 0.0)
                {
                    amount = amount - armour;
                    armour = 0.0;
            }
            else
            {
                    armour = tmp;
                    amount = 0;
            }
            if(armour > GetPlayerArmourEx(playerid))
                armour = 0.0;

            SetPlayerArmourEx(playerid, armour,weaponid);
        }
        hp = (hp - amount);
        if(hp > GetPlayerHealthEx(playerid))
            hp = 0.0;

        SetPlayerHealthEx(playerid, hp, weaponid);
    }
    else
    {
        hp = (hp - amount);
        if(hp > GetPlayerHealthEx(playerid))
            hp = 0.0;
            SetPlayerHealthEx(playerid, hp, weaponid);
    }
    return 1;
}


public OnPlayerTakeDamage(playerid, issuerid, Float: amount, weaponid, bodypart)
{
    if(weaponid == 34)
        if(bodypart == 9) //sniper headshoot 2.5x damage
            amount = amount*2.5;

    DamagePlayer(playerid, amount, weaponid, GetPlayerHealthEx(playerid), GetPlayerArmourEx(playerid), issuerid);

    return 1;
}