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#include <amxmodx> 
#include <cstrike> 
#include <fakemeta> 
#include <hamsandwich> 

#pragma semicolon 1 

new bool:g_bPlayerInvisible[33], bool:g_bWaterInvisible[33]; 
new bool:g_bWaterEntity[1386], bool:g_bWaterFound; 

new g_iSpectatedId[33]; 

public plugin_init( ) 
{ 
    register_plugin( "Invis", "1.0", "SchlumPF"); 
     
    register_clcmd( "say /invis", "menuInvisDisplay" ); 
    register_menucmd( register_menuid( "rInvisibility by SchlumPF^n^n" ), 1023, "menuInvisAction" ); 
     
    register_forward( FM_PlayerPreThink, "fwdPlayerPreThink_Pre", 0 ); 
    register_forward( FM_AddToFullPack, "fwdAddToFullPack_Post", 1 ); 
     
    RegisterHam( Ham_Spawn, "player", "hamSpawnPlayer_Post", 1 ); 
    set_task(180.0, "Information",0,"",0,"b"); 
} 

public Information() { 
    client_print(0,print_chat, "[ AMXX ] If you have Lag/FPS Problems write /invis in chat and remove Players and Water."); 
} 
public plugin_cfg( ) 
{ 
    // find all water entitys to make AddToFullPack use less cpu 
    new ent = engfunc( EngFunc_FindEntityByString, -1, "classname", "func_water" ); 
    while( ent ) 
    { 
        if( !g_bWaterFound ) 
        { 
            g_bWaterFound = true; 
        } 

        g_bWaterEntity[ent] = true; 
         
        ent = engfunc( EngFunc_FindEntityByString, ent, "classname", "func_water" ); 
    } 
} 

public fwdPlayerPreThink_Pre( plr ) 
{ 
    if( !is_user_alive( plr ) ) 
    { 
        g_iSpectatedId[plr] = pev( plr, pev_iuser2 ); 
    } 
} 

public fwdAddToFullPack_Post( es_handle, e, ent, host, hostflags, player, pset ) 
{ 
    if( player ) 
    { 
        if( g_bPlayerInvisible[host] && host != ent ) 
        { 
            if( ent != g_iSpectatedId[host] && cs_get_user_team( host ) == cs_get_user_team( ent ) ) 
            { 
                set_es( es_handle, ES_Origin, { 999999999.0, 999999999.0, 999999999.0 } ); 
                set_es( es_handle, ES_RenderMode, kRenderTransAlpha ); 
                set_es( es_handle, ES_RenderAmt, 0 ); 
            } 
        } 
    } 
    else if( g_bWaterInvisible[host] ) 
    { 
        if( g_bWaterEntity[ent] ) 
        { 
            set_es( es_handle, ES_Effects, EF_NODRAW ); 
        } 
    } 
} 

public hamSpawnPlayer_Post( plr ) 
{ 
    g_iSpectatedId[plr] = 0; 
} 

public menuInvisDisplay( plr ) 
{ 
    static menu[2048]; 

    new len = format( menu, sizeof menu - 1, "rInvisibility by SchlumPF^n^n" ); 
     
    len += format( menu[len], sizeof menu - len, "r01. Players: %s^n", g_bPlayerInvisible[plr] ? "Invisible" : "Visible" ); 
    len += format( menu[len], sizeof menu - len, "r02. Water: %s^n^n", g_bWaterFound ? ( g_bWaterInvisible[plr] ? "Invisible" : "Visible" ) : "There is no water in map" ); 
  
    len += format( menu[len], sizeof menu - len, "r00. rExit" ); 
     
    show_menu( plr, ( 1<<0 | 1<<1 | 1<<9 ), menu, -1 ); 
         
    return PLUGIN_HANDLED; 
} 

public menuInvisAction( plr, key ) 
{ 
    switch( key ) 
    { 
        case 0: 
        { 
            g_bPlayerInvisible[plr] = !g_bPlayerInvisible[plr]; 
            menuInvisDisplay( plr ); 
        } 
        case 1: 
        { 
            g_bWaterInvisible[plr] = !g_bWaterInvisible[plr]; 
            menuInvisDisplay( plr ); 
        } 
        case 9: show_menu( plr, 0, "" ); 
    } 
} 

public client_connect( plr ) 
{ 
    g_bPlayerInvisible[plr] = false; 
    g_bWaterInvisible[plr] = false; 
    g_iSpectatedId[plr] = 0; 
}