[verideth]

Hey guys, I've recently gotten into gmod modding in C++ and am just wondering how I could print out my health to console.

So far, printing to console is working completely fine, and I have a lot of history with modding source engine and c++. But when I do something like this it crashes:
Here is my code

PHP Code:

#pragma once

#include <iostream>
#include <Windows.h>
#include "GarrysMod/Lua/Interface.h"
#include "GarrysMod/Lua/Types.h"
#include "GarrysMod/Lua/UserData.h"
#include "GarrysMod/Lua/LuaBase.h"
#include "cbase.h"

using namespace GarrysMod::Lua;

#define LOADINTERFACE(_module_, _version_, _out_) Sys_LoadInterface(_module_, _version_, NULL, reinterpret_cast<void**>(& _out_ ))

namespace GOGL
{
    void GOGL_Print(const char* msg, ...)
    {
        ConColorMsg(Color(25, 25, 245, 255), msg);
    }

    int GOGL_HealthPrint()
    {
        IClientEntityList* entList = (IClientEntityList*)LOADINTERFACE("client.dll", VCLIENTENTITYLIST_INTERFACE_VERSION, entList);
        IVEngineClient* eng = (IVEngineClient*)LOADINTERFACE("engine.dll", VENGINE_CLIENT_INTERFACE_VERSION_13, eng);
        CBaseEntity* baseEnt = (CBaseEntity*)entList->GetClientEntity(eng->GetLocalPlayer());

        GOGL::GOGL_Print("%i\n", baseEnt->GetHealth());

        return 1;
    }
} 


It causes an error, and that error is (from visual studios 2013 debugger):

PHP Code:

First-chance exception at 0x359C1303 (gmcl_gogl5_win32.dll) in hl2.exe: 0xC0000005: Access violation reading location 0x00000001. 


It should be working, but its obviously not. Thanks! All helps appreciated!

[verideth]

UPDATE:

I just checked to see if entList and eng are nullptr. They are not. This is very strange.

[psychonic]

Garry's Mod probably doesn't match the 2013 SDK close enough for what you're doing.

"Access violation reading location 0x00000001."

One of the functions you're calling is probably not the function you're expecting it to be, and returning 1/true instead of a pointer, so not NULL, but not what you want either.

[verideth]

Originally Posted by psychonic Garry's Mod probably doesn't match the 2013 SDK close enough for what you're doing. "Access violation reading location 0x00000001." One of the functions you're calling is probably not the function you're expecting it to be, and returning 1/true instead of a pointer, so not NULL, but not what you want either.

Yea, I've heard it uses the 2007 SDK. Maybe I should use that?

[verideth]

UPDATE:

I changed my function to

PHP Code:

        IVEngineServer* engine = (IVEngineServer*)LOADINTERFACE("engine", INTERFACEVERSION_VENGINESERVER, engine);

        GOGL::GOGL_Print("%i\n", engine->GetServerTime()); 


I'm using hl2sdk. You're right, I think the function is different from gmod, which isn't good. What would you recommend?

(This is also not working, once again returning 0x1)

[KyleS]

Originally Posted by verideth UPDATE: I changed my function to PHP Code:         IVEngineServer* engine = (IVEngineServer*)LOADINTERFACE("engine", INTERFACEVERSION_VENGINESERVER, engine);         GOGL::GOGL_Print("%i\n", engine->GetServerTime());  I'm using hl2sdk. You're right, I think the function is different from gmod, which isn't good. What would you recommend? (This is also not working, once again returning 0x1)

PHP Code:

bool loaded = !!(LOADINTERFACE("engine.dll", VENGINE_CLIENT_INTERFACE_VERSION_13, engine));
if (loaded)
    GOGL::GOGL_Print("%i\n", engine->GetServerTime()); 


[psychonic]

Originally Posted by verideth Yea, I've heard it uses the 2007 SDK. Maybe I should use that?

It doesn't use either of them. It would be closer to 2013. The engine headers may be close enough, but server classes like C_BaseEntity, etc. are not going to be near matching. You'd have to reverse it on your own.