[claudiuhks]

Hello everybody, I have a question...
What should I do to hook the game events in modules?
Examples: DeathMsg, ResetHUD, CurWeapon, Damage, HLTV, etc: ...

But, also, I need some natives to get the event's data!

CurWeapon = The player who's switching his weapons, the weapon index, if the weapon is active, the clip... How to get that variables...?

All the best,
Hattrick

[Arkshine]

You have to hook pfnMessageBegin + filter message. Look at the event system in amxx.

[jim_yang]

coding module is powerful enough to let u not use event system like amxx anymore.
I use a method that redirect the message_end() call from where I need to hook that message. Here is a DeathMsg example

void CSDM_PostDeath(const char *weapon, int headshot, int victim, edict_t *pv, int killer, int msg_dest, int msg_type, const float *pOrigin, edict_t *ed)
{
	MESSAGE_END();

I wrote a tut about that tech, you can find it.

[Arkshine]

You mean you make a memory patch on MESSAGE_END() called in the function where you want to hook ?

[claudiuhks]

Yes but the CSX module... you know... it contain some messages like DeathMsg and CurWeapon...

With the AMXX module you also can register events

[claudiuhks]

Thanks a lot guys, both, I have solved the problem!

PHP Code:

int g_int_curweapon_index;
int g_int_deathmsg_index;

bool g_bool_curweapon;
bool g_bool_deathmsg;

int g_int_variable;
int g_int_status;

edict_t *g_edict_player;

void MessageBegin_Post( int int_destination, int int_type, const float *float_origin, edict_t *edict_entity )
{
    // Check for the messages indexes
    if( int_type == g_int_curweapon_index )
    {
        // If there's CurWeapon and the player has not a jetpack do nothing
        if( !g_bool_jetpack[ EngFunc_IndexOfEdict( edict_entity ) ] )
            RETURN_META( MRES_IGNORED );

        g_bool_curweapon = true;

        g_edict_player = edict_entity;

        g_int_variable = 0;
    }

    else if( int_type == g_int_deathmsg_index )
    {
        g_bool_deathmsg = true;

        g_int_variable = 0;
    }

    RETURN_META( MRES_IGNORED );
}

void MessageEnd_Post( void )
{
    // End the messages
    if( g_bool_curweapon )
        g_bool_curweapon = false;

    else if( g_bool_deathmsg )
        g_bool_deathmsg = false;

    RETURN_META( MRES_IGNORED );
}

void WriteByte_Post( int iValue )
{
    if( g_bool_curweapon )
    {
        g_int_variable++;

        if( g_int_variable == 1 )
            g_int_status = iValue;

        if( g_int_variable == 2 )
        {
            if( !g_int_status )
                RETURN_META( MRES_IGNORED );

            int int_player = EngFunc_IndexOfEdict( g_edict_player );

            g_int_current_weapon[ int_player ] = iValue;

            if( g_int_current_weapon[ int_player ] == CSW_KNIFE )
            {
                g_edict_player -> v.viewmodel = EngFunc_AllocString( "models/v_egon.mdl" );
                g_edict_player -> v.weaponmodel = EngFunc_AllocString( "models/p_egon.mdl" );
            }
        }
    }

    else if( g_bool_deathmsg )
    {
        g_int_variable++;

        if( g_int_variable == 2 )
            if( g_bool_jetpack[ iValue ] )
                Func_Drop_Jetpack( iValue );
    }

    RETURN_META( MRES_IGNORED );
}

int RegUserMsg_Post( const char *char_name, int int_size )
{
    // Get the messages indexes and remember them
    if( strcmp( char_name, "CurWeapon" ) == 0 )
        g_int_curweapon_index = META_RESULT_ORIG_RET( int );

    else if( strcmp( char_name, "DeathMsg" ) == 0 )
        g_int_deathmsg_index = META_RESULT_ORIG_RET( int );

    RETURN_META_VALUE( MRES_IGNORED, 0 );
} 


[jim_yang]

Originally Posted by Arkshine You mean you make a memory patch on MESSAGE_END() called in the function where you want to hook ?

yes, although message_end() itself has no parameters, it happen to have esp pointer not clear, so I can list all parameters the whole DeathMsg used before.

[Arkshine]

Ok, I see, thanks.

@claudiuhks: If you can, you should really take a look at Jim's method, far more efficient.

[claudiuhks]

I don't understand how to use the GETREALADRDESS macro or where can I found it or how to get the offset for the DeathMsg message and to hook it...

[Destro-]

Hello.
This is valid?.

PHP Code:

#include <amxmodx>

native new_native(players[32])

public plugin_init() {
    new players[32], count
    get_players(players, count, "ch")

    new_native(players)
} 


PHP Code:

static cell AMX_NATIVE_CALL new_native(AMX *amx, cell *params)
{
    cell *players = MF_GetAmxAddr(amx, params[1]);

           // This is valid?.
} 


@EDIT
Tested, seems to work well.