HamSandWich function:
PHP Code:
Ham_TakeDamage 
Description:
This function gives us info about the moment a player takes damage, when we use it as a forward. The return of the forward is a boolean, if it is set to 1 then the damage will be done if set to 0 then it will not be done!
It also can be used to give damage.
Here I will present how to correctly use this function!
You should use this function when you want to simulate an attack by a entity!


Usage:
PHP Code:
#define OFFSET_LAST_HIT_GROUP      75
#define EXTRAOFFSET_PL_LINUX        5

// plugin_init()
RegisterHam(Ham_TakeDamage, "player", "fw_takedamage")

public fw_takedamage(victim, inflictor, attacker, Float:damage, bits)
{
    // Victim is the entity that has been taken damage
    // Inflictor is the entity that directly gived damage
    // Attacker is the owner of the inflictor
    // If Attacker == Inflictor that means that the damage was inflicted by a player (such as gun shot/knife stab)
    // Damage the damage
    // Bits the type of damage represented in Bitsums
    
    // For grenade damage (In CS) the bits is equal to (1<<24)
    // Basically for hooking the he grenade damage is to put this condition
    // if (bits & (1<<24))
    
    // For bullet/knife damage (In CS) the bits are equal to (DMG_BULLET | DMG_NEVERGIB)
    // Basically for hooking the shot damage is to put this condition
    // if (bits & (DMG_BULLET | DMG_NEVERGIB))

    // Now the most subtile element is that we can get the last hitgroup where the damage was dealt

    new hitgroup = get_pdata_int(victim, OFFSET_LAST_HIT_GROUP, EXTRAOFFSET_PL_LINUX)
} 
How to properly execute damage? This is the way to do it!
PHP Code:
#define OFFSET_LAST_HIT_GROUP      75
#define EXTRAOFFSET_PL_LINUX        5

new const Float:hitgroup_multi[] =
{
    1.0,  // HIT_GENERIC
    4.0,  // HIT_HEAD
    1.0,  // HIT_CHEST
    1.25, // HIT_STOMACH
    1.0,  // HIT_LEFTARM
    1.0,  // HIT_RIGHTARM
    0.75, // HIT_LEFTLEG
    0.75  // HIT_RIGHTLEG
    0.0   // HIT_SHIELD
}

stock Ham_ExecDamage(victim, inflictor, attacker, damage, hitgroup, bits)
{
    set_pdata_int(victim, OFFSET_LAST_HIT_GROUP, hitgroup, EXTRAOFFSET_PL_LINUX)
    ExecuteHam(Ham_TakeDamage, victim, inflictor, attacker, damage*hitgroup_multi[hitgroup], bits)
}

stock Ham_ExecDamageB(victim, inflictor, attacker, damage, hitgroup, bits)
{
    set_pdata_int(victim, OFFSET_LAST_HIT_GROUP, hitgroup, EXTRAOFFSET_PL_LINUX)
    ExecuteHamB(Ham_TakeDamage, victim, inflictor, attacker, damage*hitgroup_multi[hitgroup], bits)
}

stock HamRadiusDamage(ent, Float:radius, Float:damage, bits)
{
    new target = -1, Float:origin[3]
    pev(ent, pev_origin, origin)
    
    while(( target = find_ent_in_sphere(target, origin, radius) ))
    {
        static Float:o[3]
        pev(target, pev_origin, o)
        
        xs_vec_sub(origin, o, o)
        
        // Recheck if the entity is in radius
        if (xs_vec_len(o) > radius)
            continue
        
        Ham_ExecDamageB(target, ent, pev(ent, pev_owner), damage * (xs_vec_len(o) / radius), HIT_GENERIC, bits)
    }
}