[thEsp]

This is a simple tutorial which is about modifying weapons in Counter Strike
It's not really complicated as it sounds, but requires some basic knowledge (Medium to intermediate)
There MAY be better ways or options, but this is just an average tutorial.
I have commented most of the lines, and possibly even used stupid terms, so please don't mind me for that. =@

This features:

• Custom sound(s)
• Custom model(s)
• Custom secondary attack
• Custom magazine/clip size

For sample purposes I've added these:
Explosion at the point where shooting
Delay between each shot (Could be used for making semi-automatic weapons)
Aug/Sg530 zooming style
50 bullets per mag

Basically I replaced Galil contents with H&K(Heckler & Koch AG36,sophisticated German AR) ones.

While there is a explosion, it won't do damage, and only specific weapons can be changed(For example if you're using a skin made for AK47, it won't work with other weapons)

I will try to expand this tutorial(or create new one) and overlap what I said above^ whenever I have free time...

Bugs may exist (I only know one. If you pick a dropped Hk/Galil it's mag size will be set to selected amount; WHICH by default is 50.)

Actual Code

PHP Code:

#include <amxmodx>
#include <amxmisc>
#include <hamsandwich>
#include <fakemeta>
#include <engine>
#include <cstrike>
#include <fun>

/* Models */

#define MDL_VIEW "models/v_hk.mdl" // View model (What you see when holding the weapon)
#define MDL_WORLD "models/w_hk.mdl" // World model (What you see when SOMEONE/YOU drop(s) the weapon)

/* Sounds */

#define SOUND_SHOOT1 "weapons/hk-1.wav" // Weapon sound 1
#define SOUND_SHOOT2 "weapons/hk-2.wav" // Weapon sound 2

/* Properties */

new Float:WAIT_TIME = 0.2 // Delay between each gunshot
new Float:WAIT_TIME_SCOPE = 0.25 // Scope delay

new bool:g_bCantShoot[33] // We will use this in order to check/delay every shoot
new bool:g_bDidShoot[33] // We will use this in order to check/delay sounds

new bool:g_bCantScope[33] // We will use this in order to check/delay zooming

new bool:g_bMagSet[33]

/* Other stuff */

new explosion_sprite

#define CSW_HK CSW_GALIL
#define HK_MAXAMMO 50

public plugin_init()
{
    register_plugin(random(1) ? "H&K Weapon" : "Weapon modifying tutorial","","thEsp (4D1)")

    register_forward(FM_UpdateClientData,"fwUpdateClientDataPost",1) // Hooks client-side changes
    register_forward(FM_SetModel,"fwSetModelPost",1)
    
    RegisterHam(Ham_Weapon_PrimaryAttack,"weapon_galil","hamShotPre",0) // Hooks shooting
    RegisterHam(Ham_Weapon_PrimaryAttack,"weapon_galil","hamShotPost",1) // Hooks shooting
    /* 
        Both forwards above CANNOT be reigstered from "player"(s)
        Elsewise server MAY even crash or plugin might not work completely
    */
    RegisterHam(Ham_Item_PostFrame,"weapon_galil","hamScopePre",0) // Hooks secondary attack
    RegisterHam(Ham_Weapon_Reload,"weapon_galil","hamReloadPre",0) // Hooks weapon reload
    RegisterHam(Ham_Item_PreFrame,"weapon_galil","hamGalilUsagePre",1) // Hooks clip size
    
    register_event("CurWeapon","evWeaponChanged","be","1=1") // Hooks weapon changing/switching
}

public plugin_precache()
{
    // Precaches models,sounds and sprites (If not did so, server will crash upon start)
    precache_model(MDL_VIEW)
    precache_model(MDL_WORLD)
    precache_sound(SOUND_SHOOT1)
    precache_sound(SOUND_SHOOT2)
    
    explosion_sprite = precache_model("sprites/zerogxplode.spr")
}

public fwUpdateClientDataPost(id,sendweapons,cd_handle) // Special thanks to EFFx
{
    if(!g_bCantShoot[id]) return PLUGIN_CONTINUE // Returns if player CAAAAN shoot
    set_cd(cd_handle,CD_flNextAttack,WAIT_TIME)  // Blocks shooting for some time
    return FMRES_HANDLED
}

public fwSetModelPost(entity,const model[])
{
    if(pev_valid(entity) && equal(model,"models/w_galil.mdl"))
    {
        new id = entity_get_edict(entity,EV_ENT_owner) // Gets entity(galil)'s owner index
        entity_set_model(entity,MDL_WORLD)
        g_bMagSet[id] = false
        return FMRES_SUPERCEDE
    }
    return -0 // Nothing
}

public hamShotPre(galil)
{
    if(WAIT_TIME<=0.1) return HAM_HANDLED // Returns if there's no delay
    new id = entity_get_edict(galil,EV_ENT_owner) // Gets entity(galil)'s owner index
    
    if(!g_bCantShoot[id])
    {
        g_bCantShoot[id] = true // Declare that player CAN'T shoot (Delay)
        g_bDidShoot[id] = true // Declare that player DID shoot
        set_task(WAIT_TIME,"tskSetShotAvailability",id)
    }else 
    {
        g_bDidShoot[id]=false // Declare that player DIDN'T shoot
        return HAM_SUPERCEDE // If player can't shoot because of delay, returns and blocks shooting
    }
    return HAM_IGNORED // Returns once again in the end so compiler doesn't throw a warning (AFAIK 1.9+)
}

public hamShotPost(galil)
{
    new id = entity_get_edict(galil,EV_ENT_owner) // Gets index of player who is holding the gun

    static clip,ammo
    get_user_ammo(id,get_user_weapon(id),clip,ammo)
    
    /*
        Code below CHECKS if player just shooted AND has bullets in clip 
        If second check isn't performed, player(s) will still be able to hear gun shots
        
        Variable "sound" is a random number from 1 to 2
        It will be used to allocate random gunshot sound VIA switch statement
        
        The third/fourth statement CHECKS if variable WAIT_TIME is less or equal to 0.1
        It will be used to check if there is no delay
        If this is not performed, weapon(galil) will be bugged, as well as the game

    */
    
    if(g_bDidShoot[id] && clip!=0 || WAIT_TIME<=0.1 && clip!=0) 
    {
        new sound = random_num(1,2) // Random number for 1 to 2
        switch(sound)
        {
            case 1: emit_sound(id,CHAN_AUTO,SOUND_SHOOT1,1.0,ATTN_NORM,0,PITCH_NORM) // First gunshot
            case 2: emit_sound(id,CHAN_AUTO,SOUND_SHOOT2,1.0,ATTN_NORM,0,PITCH_NORM) // Second gunshot
        }
            
        new aim_position[3]; get_user_origin(id,aim_position,3) // Gets aiming position
        te_create_explosion(aim_position,explosion_sprite) // Makes an explosion effect at aiming position
        
    }
    return HAM_SUPERCEDE // Probably unnecessary 
}

public hamScopePre(galil)
{
    new id = entity_get_edict(galil,EV_ENT_owner) // Gets index of player who is holding the gun

    new buttons = entity_get_int(id,EV_INT_button)

    if(buttons & IN_ATTACK2)
    {
        if(!g_bCantScope[id])
        {
            if(!(cs_get_user_zoom(id) & CS_SET_AUGSG552_ZOOM))
            {
                cs_set_user_zoom(id,CS_SET_AUGSG552_ZOOM,1) // Sets zooming
                g_bCantScope[id] = true
                set_task(WAIT_TIME_SCOPE,"tskSetScopeAvailability",id)
            }else
            {
                cs_set_user_zoom(id,CS_RESET_ZOOM,1) // Removes zooming
                g_bCantScope[id] = true // Declares that player CAAAN zoom
                set_task(WAIT_TIME_SCOPE,"tskSetScopeAvailability",id)
            }
        }
    }
}

public hamReloadPre(galil)
{
    new id = entity_get_edict(galil,EV_ENT_owner) // Gets index of player who is holding the gun
    
    static clip,ammo
    get_user_ammo(id,get_user_weapon(id),clip,ammo) // Gets clip and ammo number
    
    if(clip == HK_MAXAMMO) return HAM_SUPERCEDE // Returns if weapon has as much bullets as prechanged value is 
    
    cs_set_user_zoom(id,CS_RESET_ZOOM,1)
    g_bCantScope[id] = false // Declares that player CAAAN scope
    set_task(2.7,"tskChangeAmmo",id) // Sets a task to reset availability for reloading
    
    return HAM_HANDLED
}

public hamGalilUsagePre(galil)
{
    new id = entity_get_edict(galil,EV_ENT_owner) // Gets index of player who is holding the gun
    
    if(!g_bMagSet[id])
    {
        #define fm_cs_set_weapon_ammo(%1,%2) set_pdata_int(%1, 51, %2, 4)
        fm_cs_set_weapon_ammo(get_pdata_cbase(id,373),HK_MAXAMMO)
        g_bMagSet[id] = true
    }
}

public evWeaponChanged(id)
{
    new weapon = read_data(2) // Gets weapon index (Could also be removed and replaced with read_data(2) )
    if(weapon == CSW_HK) // Checks if changed weapon is Hk
    {
        entity_set_model(id,MDL_VIEW) // Sets players view model 
    }
}

public tskSetShotAvailability(id)
{
    g_bCantShoot[id] = false // Declare that player CAAAN shoot
}

public tskSetScopeAvailability(id)
{
    g_bCantScope[id] = false // Declare that player CAAAN shoot
}

public tskChangeAmmo(id)
{
    g_bMagSet[id] = false
}

/* Stock below taken from OciXCrom's message stocks header */
stock te_create_explosion(position[3],sprite,scale=10,framerate=30,flags=TE_EXPLFLAG_NONE,receiver=0)
{
    if(receiver && !is_user_connected(receiver))
        return 0
    message_begin(MSG_ALL,SVC_TEMPENTITY,_,receiver)
    write_byte(TE_EXPLOSION)
    write_coord(position[0])
    write_coord(position[1])
    write_coord(position[2])
    write_short(sprite)
    write_byte(scale)
    write_byte(framerate)
    write_byte(flags)
    message_end()
    return 1
}


/* For intermediate coders :

    The reason I had to also use engine is because some pev/set_pev functions don't work properly
    And what I found "crazy" is that I simply couldn't even change viewmodel using fakemeta

    Seems that engine is far superior to fakemeta (?)
*/