ZP addons knife

#include <amxmodx>
#include <fakemeta>
#include <hamsandwich>
#include <zombieplague>

#define PLUGIN    "[ZP] Addon: Knife"
#define VERSION    "0.1"
#define AUTHOR    "CHyC"

#define VIP ADMIN_LEVEL_H

new KNIFE1_V_MODEL[] = "models/v_axe.mdl"
new KNIFE1_P_MODEL[] = "models/p_axe.mdl"

new KNIFE2_V_MODEL[] = "models/v_strong.mdl"
new KNIFE2_P_MODEL[] = "models/p_strong.mdl"

new KNIFE3_V_MODEL[] = "models/v_combat.mdl"
new KNIFE3_P_MODEL[] = "models/p_combat.mdl"

new KNIFE4_V_MODEL[] = "models/v_SuperVIP.mdl"
new KNIFE4_P_MODEL[] = "models/p_SuperVIP.mdl"

new bool:g_KNIFE1[33]
new bool:g_KNIFE2[33]
new bool:g_KNIFE3[33]
new bool:g_KNIFE4[33]
new bool:g_hasSpeed[33]

new g_knife_menu, cvar_knock, cvar_jump, cvar_knife_gore, cvar_dmgmult1, cvar_dmgmult2, cvar_dmgmult3, cvar_knife_spd
new cvar_jump_vip, cvar_dmgmult_vip, cvar_knife_spd_vip, cvar_knock_vip

new const g_sound_knife[] = { "items/gunpickup2.wav" }

new const a_sounds[][] =
{
    "axe/knife_deploy1.wav",
    "axe/knife_hit1.wav",
    "axe/knife_hit2.wav",
    "axe/knife_hit3.wav",
    "axe/knife_hit4.wav",
    "axe/knife_hitwall1.wav",
    "axe/knife_slash1.wav",
    "axe/knife_slash2.wav",
    "axe/knife_stab.wav"
}

new const b_sounds[][] =
{
    "hammer/knife_deploy1.wav",
    "hammer/knife_hit1.wav",
    "hammer/knife_hit2.wav",
    "hammer/knife_hit3.wav",
    "hammer/knife_hit4.wav",
    "hammer/knife_hitwall1.wav",
    "hammer/knife_slash1.wav",
    "hammer/knife_slash2.wav",
    "hammer/knife_stab.wav"
}

new const c_sounds[][] =
{
    "combat/knife_deploy1.wav",
    "combat/knife_hit1.wav",
    "combat/knife_hit2.wav",
    "combat/knife_hit3.wav",
    "combat/knife_hit4.wav",
    "combat/knife_hitwall1.wav",
    "combat/knife_slash1.wav",
    "combat/knife_slash2.wav",
    "combat/knife_stab.wav"
}

new const d_sounds[][] =
{
    
        "strong/knife_deploy1.wav",
    "strong/knife_hit1.wav",
    "strong/knife_hit2.wav",
    "strong/knife_hit3.wav",
    "strong/knife_hit4.wav",
    "strong/knife_hitwall1.wav",
    "strong/knife_slash1.wav",
    "strong/knife_slash2.wav",
    "strong/knife_stab.wav"
}

new const oldknife_sounds[][] =
{
    "weapons/knife_deploy1.wav",
    "weapons/knife_hit1.wav",
    "weapons/knife_hit2.wav",
    "weapons/knife_hit3.wav",
    "weapons/knife_hit4.wav",
    "weapons/knife_hitwall1.wav",
    "weapons/knife_slash1.wav",
    "weapons/knife_slash2.wav",
    "weapons/knife_stab.wav"
}

public plugin_init()
{
    register_plugin(PLUGIN , VERSION , AUTHOR);
    register_cvar("zp_addon_knife", VERSION, FCVAR_SERVER);

    g_knife_menu = menu_create("\yВыбор ножей:","menu_handle")
    register_clcmd("/knife","knifemenu",ADMIN_ALL,"knife_menu")
    register_clcmd("/knife1", "buy_knife1")
    register_clcmd("/knife2", "buy_knife2")
    register_clcmd("/knife3", "buy_knife3")
    register_clcmd("/knife4", "buy_knife4")
    build_menu()

    register_event("CurWeapon","checkWeapon","be","1=1");
    register_forward(FM_EmitSound, "fw_EmitSound");
    register_forward(FM_PlayerPreThink, "fw_PlayerPreThink");
    RegisterHam(Ham_TakeDamage, "player", "fw_TakeDamage");

    register_message(get_user_msgid("DeathMsg"), "message_DeathMsg");

    cvar_knock        = register_cvar("zp_knife_power"        , "6");
    cvar_jump        = register_cvar("zp_knife_jump"            , "400.0");
    cvar_knife_gore        = register_cvar("zp_knife_effect"        , "1");
    cvar_dmgmult1        = register_cvar("zp_knife_dmg_muiti1"        , "3");
    cvar_dmgmult2        = register_cvar("zp_knife_dmg_muiti2"        , "5");
    cvar_dmgmult3        = register_cvar("zp_knife_dmg_muiti3"        , "2");
    cvar_knife_spd        = register_cvar("zp_knife_spd"            , "300");
    cvar_jump_vip        = register_cvar("zp_knife_jump_vip"        , "300.0");
    cvar_dmgmult_vip    = register_cvar("zp_knife_dmg_vip"        , "8");
    cvar_knife_spd_vip    = register_cvar("zp_knife_spd_vip"        , "350");
    cvar_knock_vip        = register_cvar("zp_knife_power_vip"        , "15");
}

public client_connect(id)
{
    g_KNIFE1[id] = false
    g_KNIFE2[id] = false
    g_KNIFE3[id] = false
    g_KNIFE4[id] = false
    g_hasSpeed[id] = false
}

public client_disconnect(id)
{
    g_KNIFE1[id] = false
    g_KNIFE2[id] = false
    g_KNIFE3[id] = false
    g_KNIFE4[id] = false
    g_hasSpeed[id] = false
}

public plugin_precache()
{
    precache_model(KNIFE1_V_MODEL)
    precache_model(KNIFE1_P_MODEL)
    precache_model(KNIFE2_V_MODEL)
    precache_model(KNIFE2_P_MODEL)
    precache_model(KNIFE3_V_MODEL)
    precache_model(KNIFE3_P_MODEL)
    precache_model(KNIFE4_V_MODEL)
    precache_model(KNIFE4_P_MODEL)

    precache_sound(g_sound_knife)

    for(new i = 0; i < sizeof a_sounds; i++)
        precache_sound(a_sounds[i])

    for(new i = 0; i < sizeof b_sounds; i++)
        precache_sound(b_sounds[i])

    for(new i = 0; i < sizeof c_sounds; i++)
        precache_sound(c_sounds[i])

    for(new i = 0; i < sizeof d_sounds; i++)
        precache_sound(d_sounds[i])
}

build_menu()
{

    menu_additem(g_knife_menu, "Скоростной", "1")
    menu_additem(g_knife_menu, "Повышенный урон", "2")
    menu_additem(g_knife_menu, "Понижена гравитация", "3")
    menu_additem(g_knife_menu, "Меч охотника \r[Super V.I.P]", "4")
    menu_setprop(g_knife_menu, MPROP_PERPAGE, 0)
}

public knifemenu(id)
{
    if (zp_has_round_started())
        return PLUGIN_HANDLED

    if (!zp_has_round_started())
    {
        menu_display(id, g_knife_menu, 0)
    }
    return PLUGIN_HANDLED
}

public menu_handle(id, menu, item)
{
    if(item < 0) return PLUGIN_CONTINUE
    new cmd[2];
    new access, callback;
    menu_item_getinfo(menu, item, access, cmd,2,_,_, callback);
    new choice = str_to_num(cmd)
    switch (choice)
    {
        case 1: buy_knife1(id)
        case 2: buy_knife2(id)
        case 3: buy_knife3(id)
        case 4: buy_knife4(id)
    }
    return PLUGIN_HANDLED;
}

public buy_knife1(id)
{
    g_KNIFE1[id] = true    
    g_KNIFE2[id] = false    
    g_KNIFE3[id] = false
    g_KNIFE4[id] = false
    g_hasSpeed[id] = true

    engfunc(EngFunc_EmitSound, id, CHAN_BODY, g_sound_knife, 1.0, ATTN_NORM, 0, PITCH_NORM)
}

public buy_knife2(id)
{
    g_KNIFE1[id] = false    
    g_KNIFE2[id] = true    
    g_KNIFE3[id] = false
    g_KNIFE4[id] = false
    g_hasSpeed[id] = false

    engfunc(EngFunc_EmitSound, id, CHAN_BODY, g_sound_knife, 1.0, ATTN_NORM, 0, PITCH_NORM)
}

public buy_knife3(id)
{
    g_KNIFE1[id] = false    
    g_KNIFE2[id] = false    
    g_KNIFE3[id] = true
    g_KNIFE4[id] = false
    g_hasSpeed[id] = false

    engfunc(EngFunc_EmitSound, id, CHAN_BODY, g_sound_knife, 1.0, ATTN_NORM, 0, PITCH_NORM)
}

public buy_knife4(id)
{
    if (get_user_flags(id) & VIP)
    {
        g_KNIFE1[id] = false    
        g_KNIFE2[id] = false    
        g_KNIFE3[id] = false
        g_KNIFE4[id] = true
        g_hasSpeed[id] = true

        engfunc(EngFunc_EmitSound, id, CHAN_BODY, g_sound_knife, 1.0, ATTN_NORM, 0, PITCH_NORM)
    }
    else
    {
        client_cmd(id, "/knife")
    }

}

public checkWeapon(id)
{
    new plrWeapId
    
    plrWeapId = get_user_weapon(id)
    
    if (plrWeapId == CSW_KNIFE && (g_KNIFE1[id] || g_KNIFE2[id] || g_KNIFE3[id] || g_KNIFE4[id]))
    {
        checkModel(id)
    }
}

public checkModel(id)
{
    if (zp_get_user_zombie(id))
        return PLUGIN_HANDLED
    
    if (g_KNIFE1[id])
    {
        set_pev(id, pev_viewmodel2, KNIFE1_V_MODEL)
        set_pev(id, pev_weaponmodel2, KNIFE1_P_MODEL)
    }

    if (g_KNIFE2[id])
    {
        set_pev(id, pev_viewmodel2, KNIFE2_V_MODEL)
        set_pev(id, pev_weaponmodel2, KNIFE2_P_MODEL)
    }

    if (g_KNIFE3[id])
    {
        set_pev(id, pev_viewmodel2, KNIFE3_V_MODEL)
        set_pev(id, pev_weaponmodel2, KNIFE3_P_MODEL)
    }

    if (g_KNIFE4[id])
    {
        set_pev(id, pev_viewmodel2, KNIFE4_V_MODEL)
        set_pev(id, pev_weaponmodel2, KNIFE4_P_MODEL)
    }
    return PLUGIN_HANDLED
}

public fw_EmitSound(id, channel, const sound[])
{
    if(!is_user_alive(id) || zp_get_user_zombie(id))
        return FMRES_IGNORED
        
    for(new i = 0; i < sizeof a_sounds; i++)
    for(new i = 0; i < sizeof b_sounds; i++)
    for(new i = 0; i < sizeof c_sounds; i++)
    for(new i = 0; i < sizeof d_sounds; i++)
    {
        if(equal(sound, oldknife_sounds[i]))
        {
            if (g_KNIFE1[id])
            {
                emit_sound(id, channel, a_sounds[i], 1.0, ATTN_NORM, 0, PITCH_NORM)
                return FMRES_SUPERCEDE
            }
            if (g_KNIFE2[id])
            {
                emit_sound(id, channel, b_sounds[i], 1.0, ATTN_NORM, 0, PITCH_NORM)
                return FMRES_SUPERCEDE
            }
            if (g_KNIFE3[id])
            {
                emit_sound(id, channel, c_sounds[i], 1.0, ATTN_NORM, 0, PITCH_NORM)
                return FMRES_SUPERCEDE
            }
            if (g_KNIFE4[id])
            {
                emit_sound(id, channel, d_sounds[i], 1.0, ATTN_NORM, 0, PITCH_NORM)
                return FMRES_SUPERCEDE
            }
            if (!g_KNIFE1[id] || !g_KNIFE2[id] || !g_KNIFE3[id] || !g_KNIFE4[id])
            {
                emit_sound(id, channel, oldknife_sounds[i], 1.0, ATTN_NORM, 0, PITCH_NORM)
                return FMRES_SUPERCEDE
            }
        }
    }
    return FMRES_IGNORED
}

public fw_PlayerPreThink(id)
{
    if(!is_user_alive(id) || zp_get_user_zombie(id))
        return FMRES_IGNORED

    new temp[2], weapon = get_user_weapon(id, temp[0], temp[1])

    if (weapon == CSW_KNIFE && g_KNIFE1[id])
    {
        g_hasSpeed[id] = true
        set_pev(id, pev_maxspeed, get_pcvar_float(cvar_knife_spd))
    }

    if(weapon == CSW_KNIFE && g_KNIFE3[id])        
        if ((pev(id, pev_button) & IN_JUMP) && !(pev(id, pev_oldbuttons) & IN_JUMP))
        {
            new flags = pev(id, pev_flags)
            new waterlvl = pev(id, pev_waterlevel)
            
            if (!(flags & FL_ONGROUND))
                return FMRES_IGNORED

            if (flags & FL_WATERJUMP)
                return FMRES_IGNORED

            if (waterlvl > 1)
                return FMRES_IGNORED
            
            new Float:fVelocity[3]
            pev(id, pev_velocity, fVelocity)
            
            fVelocity[2] += get_pcvar_num(cvar_jump)
            
            set_pev(id, pev_velocity, fVelocity)
            set_pev(id, pev_gaitsequence, 6)
        }
    if (weapon == CSW_KNIFE && g_KNIFE4[id])
    {
        g_hasSpeed[id] = true
        set_pev(id, pev_maxspeed, get_pcvar_float(cvar_knife_spd_vip))

        if ((pev(id, pev_button) & IN_JUMP) && !(pev(id, pev_oldbuttons) & IN_JUMP))
        {
            new flags = pev(id, pev_flags)
            new waterlvl = pev(id, pev_waterlevel)
            
            if (!(flags & FL_ONGROUND))
                return FMRES_IGNORED

            if (flags & FL_WATERJUMP)
                return FMRES_IGNORED

            if (waterlvl > 1)
                return FMRES_IGNORED
            
            new Float:fVelocity[3]
            pev(id, pev_velocity, fVelocity)
            
            fVelocity[2] += get_pcvar_num(cvar_jump_vip)
            
            set_pev(id, pev_velocity, fVelocity)
            set_pev(id, pev_gaitsequence, 6)
        }
    }
    return FMRES_IGNORED
}  

public fw_TakeDamage(victim, inflictor, attacker, Float:damage, damage_type)
{
    if(!is_user_connected(attacker))
        return HAM_IGNORED
    
    if(zp_get_user_zombie(attacker))
        return HAM_IGNORED

    new weapon = get_user_weapon(attacker)
    if (weapon == CSW_KNIFE && g_KNIFE1[attacker])
    {
        SetHamParamFloat(4, damage * get_pcvar_float(cvar_dmgmult1))    
    }
    if (weapon == CSW_KNIFE && g_KNIFE2[attacker])
    {    
        SetHamParamFloat(4, damage * get_pcvar_float(cvar_dmgmult2))

        new Float:vec[3];
        new Float:oldvelo[3];
        pev(victim, pev_velocity, oldvelo);
        create_velocity_vector(victim , attacker , vec);
        vec[0] += oldvelo[0];
        vec[1] += oldvelo[1];
        set_pev(victim, pev_velocity, vec);    
    }
    if (weapon == CSW_KNIFE && g_KNIFE3[attacker])
    {    
        SetHamParamFloat(4, damage * get_pcvar_float(cvar_dmgmult3))    
    }
    if (weapon == CSW_KNIFE && g_KNIFE4[attacker])
    {    
        SetHamParamFloat(4, damage * get_pcvar_float(cvar_dmgmult_vip))    

        new Float:vec[3];
        new Float:oldvelo[3];
        pev(victim, pev_velocity, oldvelo);
        create_velocity_vector(victim , attacker , vec);
        vec[0] += oldvelo[0];
        vec[1] += oldvelo[1];
        set_pev(victim, pev_velocity, vec);
    }

    if(get_pcvar_num(cvar_knife_gore))
        more_blood(victim)

    return HAM_IGNORED
}

public message_DeathMsg(msg_id, msg_dest, id)
{
    static szTruncatedWeapon[33], iattacker, ivictim
    
    get_msg_arg_string(4, szTruncatedWeapon, charsmax(szTruncatedWeapon))
    
    iattacker = get_msg_arg_int(1)
    ivictim = get_msg_arg_int(2)
    
    if(!is_user_connected(iattacker) || iattacker == ivictim)
        return PLUGIN_CONTINUE

    if (!zp_get_user_zombie(iattacker))
    {
        if(equal(szTruncatedWeapon, "knife") && get_user_weapon(iattacker) == CSW_KNIFE)
        {
            if(g_KNIFE1[iattacker])
                set_msg_arg_string(4, "1 knife")
        }
    
        if(equal(szTruncatedWeapon, "knife") && get_user_weapon(iattacker) == CSW_KNIFE)
        {
            if(g_KNIFE2[iattacker])
                set_msg_arg_string(4, "2 knife")
        }
    
        if(equal(szTruncatedWeapon, "knife") && get_user_weapon(iattacker) == CSW_KNIFE)
        {
            if(g_KNIFE3[iattacker])
                set_msg_arg_string(4, "3 knife")
        }
    
        if(equal(szTruncatedWeapon, "knife") && get_user_weapon(iattacker) == CSW_KNIFE)
        {
            if(g_KNIFE4[iattacker])
                set_msg_arg_string(4, "4 knife")
        }
    
        if(equal(szTruncatedWeapon, "knife") && get_user_weapon(iattacker) == CSW_KNIFE)
        {
            if(!g_KNIFE1[iattacker] && !g_KNIFE2[iattacker] && !g_KNIFE3[iattacker] && !g_KNIFE4[iattacker] && !zp_get_user_zombie(iattacker))
                set_msg_arg_string(4, "knife")
        }
    }
    if (zp_get_user_zombie(iattacker))
    {
        if(equal(szTruncatedWeapon, "knife") && get_user_weapon(iattacker) == CSW_KNIFE)
        {
            if(g_KNIFE1[iattacker] || g_KNIFE2[iattacker] || g_KNIFE3[iattacker] || g_KNIFE4[iattacker])
                set_msg_arg_string(4, "Claws")
        }
    }
    return PLUGIN_CONTINUE
}

stock create_velocity_vector(victim,attacker,Float:velocity[3])
{
    if(!zp_get_user_zombie(victim) || !is_user_alive(attacker))
        return 0;

    new Float:vicorigin[3];
    new Float:attorigin[3];
    pev(victim, pev_origin , vicorigin);
    pev(attacker, pev_origin , attorigin);

    new Float:origin2[3]
    origin2[0] = vicorigin[0] - attorigin[0];
    origin2[1] = vicorigin[1] - attorigin[1];

    new Float:largestnum = 0.0;

    if(floatabs(origin2[0])>largestnum) largestnum = floatabs(origin2[0]);
    if(floatabs(origin2[1])>largestnum) largestnum = floatabs(origin2[1]);

    origin2[0] /= largestnum;
    origin2[1] /= largestnum;

    if (g_KNIFE2[attacker])
    {
        velocity[0] = ( origin2[0] * (get_pcvar_float(cvar_knock) * 3000) ) / floatround(get_distance_f(vicorigin, attorigin));
        velocity[1] = ( origin2[1] * (get_pcvar_float(cvar_knock) * 3000) ) / floatround(get_distance_f(vicorigin, attorigin));
    }
    if (g_KNIFE4[attacker])
    {
        velocity[0] = ( origin2[0] * (get_pcvar_float(cvar_knock_vip) * 3000) ) / floatround(get_distance_f(vicorigin, attorigin));
        velocity[1] = ( origin2[1] * (get_pcvar_float(cvar_knock_vip) * 3000) ) / floatround(get_distance_f(vicorigin, attorigin));
    }

    if(velocity[0] <= 20.0 || velocity[1] <= 20.0)
    velocity[2] = random_float(200.0 , 275.0);

    return 1;
}

stock fm_set_user_maxspeed(index, Float:speed = -1.0)
{
    engfunc(EngFunc_SetClientMaxspeed, index, speed);
    set_pev(index, pev_maxspeed, speed);

    return 1;
}    

more_blood(id)
{
    static iOrigin[3]
    get_user_origin(id, iOrigin)
    
    // Blood spray
    message_begin(MSG_PVS, SVC_TEMPENTITY, iOrigin)
    write_byte(TE_BLOODSTREAM)
    write_coord(iOrigin[0])
    write_coord(iOrigin[1])
    write_coord(iOrigin[2]+10)
    write_coord(random_num(-360, 360)) // x
    write_coord(random_num(-360, 360)) // y
    write_coord(-10) // z
    write_byte(70) // color
    write_byte(random_num(50, 100)) // speed
    message_end()

    for (new j = 0; j < 4; j++)
    {
        message_begin(MSG_PVS, SVC_TEMPENTITY, iOrigin)
        write_byte(TE_WORLDDECAL)
        write_coord(iOrigin[0]+random_num(-100, 100))
        write_coord(iOrigin[1]+random_num(-100, 100))
        write_coord(iOrigin[2]-36)
        write_byte(random_num(190, 197)) // index
        message_end()
    }
}