Here are some forwards that I made by poking around the binary.
You can use l4d2_OnChangeActiveWeapon to push the backpack item to the front and l4d2_OnWeaponEquip to detect switch between items in the backpack. They worked nicely for me, but I haven't had time to do detailed testing. See if you can find a use for them.
Note: Only Linux support for now as searching functions in windows can be time consuming. Support form windows will be added in the future.
FORWARDS
PHP Code:
/**
* @brief Called when player switches active weapon
*
* @param client Player index
* @param weapon Weapon index
* @param weapon Weapon name
*/
forward void l4d2_OnChangeActiveWeapon(const int client, const int weapon, char[] name);
/**
* @brief Called when player equips/picks up a weapon
*
* @param client Player index
* @param weapon Weapon index
* @param weapon Weapon name
*/
forward void l4d2_OnWeaponEquip(const int client, const int weapon, char[] name);
PLUGIN CODE
PHP Code:
#pragma semicolon 1
#pragma newdecls required
#include <sourcemod>
#include <sdktools>
#include <dhooks>
#define GAMEDATA "l4d2_backpack"
#define PLUGIN_VERSION "1.0"
#define CHAT_TAG "\x04[\x05Backpack Forwards\x04] \x01"
// Setup Forward Handles
Handle g_ActiveWeapon_Forward;
Handle g_WeaponEquip_Forward;
public Plugin myinfo =
{
name = "Backpack Forwards",
author = "$atanic $pirit",
description = "Provides forwards for backpack",
version = PLUGIN_VERSION,
url = ""
}
public void OnPluginStart()
{
Handle hGameData = LoadGameConfigFile(GAMEDATA);
if( hGameData == null )
SetFailState("Failed to load \"%s.txt\" gamedata.", GAMEDATA);
// ====================================================================================================
// Detour Setup - CBaseCombatCharacter::OnChangeActiveWeapon
// ====================================================================================================
// Create a hook from config.
Handle hDetour_OnChangeActiveWeapon = DHookCreateFromConf(hGameData, "CBaseCombatCharacter::OnChangeActiveWeapon");
if( !hDetour_OnChangeActiveWeapon )
SetFailState("Failed to setup detour for CBaseCombatCharacter::OnChangeActiveWeapon");
// Add a post hook on the function.
if (!DHookEnableDetour(hDetour_OnChangeActiveWeapon, false, Detour_OnChangeActiveWeapon))
SetFailState("Failed to detour OnChangeActiveWeapon.");
// ====================================================================================================
// Detour Setup - CBaseCombatWeapon::Weapon_Equip
// ====================================================================================================
// Create a hook from config.
Handle hDetour_Weapon_Equip = DHookCreateFromConf(hGameData, "CBaseCombatCharacter::Weapon_Equip");
if( !hDetour_Weapon_Equip )
SetFailState("Failed to setup detour for CBaseCombatCharacter::Weapon_Equip");
// Add a post hook on the function.
if (!DHookEnableDetour(hDetour_Weapon_Equip, false, Detour_Weapon_Equip))
SetFailState("Failed to detour Weapon_Equip.");
// ====================================================================================================
// Forwards Setup
// ====================================================================================================
g_ActiveWeapon_Forward = CreateGlobalForward("OnChangeActiveWeapon", ET_Ignore, Param_Cell, Param_Cell, Param_String);
g_WeaponEquip_Forward = CreateGlobalForward("OnWeaponEquip", ET_Ignore, Param_Cell, Param_Cell, Param_String);
}
// ====================================================================================================
// Function - CBaseCombatCharacter::OnChangeActiveWeapon
// ====================================================================================================
public MRESReturn Detour_OnChangeActiveWeapon(Address pThis, Handle hParams)
{
// Get the Int value
int client = view_as<int>(pThis);
int weapon = DHookGetParam(hParams, 1);
char name[20];
name = GetEntityName(weapon);
/* Start function call */
Call_StartForward(g_ActiveWeapon_Forward);
/* Push parameters one at a time */
Call_PushCell(client);
Call_PushCell(weapon);
Call_PushString(name);
/* Finish the call, get the result */
Call_Finish();
PrintToChatAll("%s OnChangeActiveWeapon - Player Name: %N, Weapon Name: %s", CHAT_TAG, client, GetEntityName(weapon));
return MRES_Ignored;
}
// ====================================================================================================
// Function - CBaseCombatCharacter::Weapon_Equip
// ====================================================================================================
public MRESReturn Detour_Weapon_Equip(Address pThis, Handle hParams)
{
// Get the Int value
int client = view_as<int>(pThis);
int weapon = DHookGetParam(hParams, 1);
char name[20];
name = GetEntityName(weapon);
/* Start function call */
Call_StartForward(g_WeaponEquip_Forward);
/* Push parameters one at a time */
Call_PushCell(client);
Call_PushCell(weapon);
Call_PushString(name);
/* Finish the call, get the result */
Call_Finish();
PrintToChatAll("%s Weapon_Equip - Player Name: %N, Weapon Name: %s.", CHAT_TAG, client, GetEntityName(weapon));
return MRES_Ignored;
}
// ====================================================================================================
// GetEntityName - Stock to get weapon's name
// ====================================================================================================
stock char GetEntityName(int entity)
{
char name[20];
GetEntityClassname(entity, name, sizeof name);
if(StrEqual(name, "weapon_melee"))
{
GetEntPropString(entity, Prop_Data, "m_strMapSetScriptName", name, sizeof name);
}
return name;
}
GAMEDATA
PHP Code:
"Games"
{/*
* CBaseCombatCharacter::OnChangeActiveWeapon (client, weapon)
* CBaseCombatCharacter::Weapon_Equip (client, weapon)
*/
"left4dead2"
{
"Functions"
{
"CBaseCombatCharacter::OnChangeActiveWeapon"
{
"signature" "CBaseCombatCharacter::OnChangeActiveWeapon"
"callconv" "thiscall"
"return" "void"
"this" "entity"
"arguments"
{
"weapon"
{
"type" "cbaseentity"
}
}
}
"CBaseCombatCharacter::Weapon_Equip"
{
"signature" "CBaseCombatCharacter::Weapon_Equip"
"callconv" "thiscall"
"return" "void"
"this" "entity"
"arguments"
{
"weapon"
{
"type" "cbaseentity"
}
}
}
}
"Signatures"
{
"CBaseCombatCharacter::OnChangeActiveWeapon"
{
"library" "server"
"linux" "@_ZN20CBaseCombatCharacter20OnChangeActiveWeaponEP17CBaseCombatWeaponS1_"
}
"CBaseCombatCharacter::Weapon_Equip"
{
"library" "server"
"linux" "@_ZN20CBaseCombatCharacter12Weapon_EquipEP17CBaseCombatWeapon"
}
}
}
}
Linear Mode
