I had a post similar to this awhile ago based on a error I was getting. I was able to fix it but since then I been having trouble doing things because headers keep blocking other headers from using code. Honestly, these headers are confusing me and if anyone has any resources that will address these types of issues, that will be helpful.

What I essentially want to do is be able to have rModel.h be included inside RenderEngine.h. every time I add rModel.h to RenderEngine.h, rModel.h is no longer able to use RenderEngine.h. (rModel.h has a #include of RenderEngine.h as well).

So in a nutshell, RenderEngine and rModel need to use each others functionalities. On top of all this confusion, the Main.cpp needs to use RenderEngine.

stdafx.h

#include "targetver.h"

#define WIN32_LEAN_AND_MEAN             // Exclude rarely-used stuff from Windows headers
// Windows Header Files:
#include <windows.h>

// C RunTime Header Files
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#include "resource.h"

main.cpp

#include "stdafx.h"
#include "RenderEngine.h"
#include "rModel.h"

// Global Variables:

RenderEngine go;

rModel *g_pModel;

...code...........

rModel.h

#ifndef _MODEL_H
#define _MODEL_H
#include "stdafx.h"
#include <vector>
#include <string>
#include "rTri.h"
#include "RenderEngine.h"

........Code

RenderEngine.h

#pragma once
#include "stdafx.h"
#include "d3d10.h"
#include "d3dx10.h"
#include "dinput.h"
#include "rModel.h"

.......Code......