// include the basic windows header files and the Direct3D header file
#include <windows.h>
#include <windowsx.h>
#include <d3d9.h>
#ifdef _DEBUG
#   pragma comment(lib, "d3dx9d.lib")
#else
#   pragma comment(lib, "d3dx9.lib")
#endif
#pragma comment(lib, "d3d9.lib")

#include <dxerr.h>
#ifdef _DEBUG
# pragma comment (lib, "dxerr.lib")
#else
#pragma comment (lib, "dxerr.h")
#endif
#pragma comment(lib, "dxerr.lib")




// define the screen resolution and keyboard macros
#define D3D_DEBUG_INFO
#define SCREEN_WIDTH 1440
#define SCREEN_HEIGHT 900
#define KEY_DOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEY_UP(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)
// include the Direct3D Library file
#pragma comment (lib, "d3d9.lib")

// global declarations
LPDIRECT3D9 d3d;    // the pointer to our Direct3D interface
LPDIRECT3DDEVICE9 d3ddev;    // the pointer to the device class
LPDIRECT3DVERTEXBUFFER9 t_buffer = NULL;
typedef LONG HRESULT hr;

// function prototypes
void initD3D(HWND hWnd);    // sets up and initializes Direct3D
void render_frame(void);    // renders a single frame
void cleanD3D(void);    // closes Direct3D and releases memory
void init_graphics(void); // 3D declaration

struct CUSTOMVERTEX {FLOAT X, Y, Z, RHW; DWORD COLOR;};
#define CUSTOMFVF (D3DFVF_XYZRHW | D3DFVF_DIFFUSE)
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);


// the entry point for any Windows program
int WINAPI WinMain(HINSTANCE hInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine,
                   int nCmdShow)
{
    HWND hWnd;
    WNDCLASSEX wc;

    ZeroMemory(&wc, sizeof(WNDCLASSEX));

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = CS_HREDRAW | CS_VREDRAW;
    wc.lpfnWndProc = (WNDPROC)WindowProc;
    wc.hInstance = hInstance;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
    wc.lpszClassName = L"WindowClass";

    RegisterClassEx(&wc);

    hWnd = CreateWindowEx(NULL,
                          L"WindowClass",
                          L"Our First Direct3D Program",
                            WS_EX_TOPMOST | WS_POPUP,    // fullscreen values
                          0, 0,    // the starting x and y positions should be 0
                          SCREEN_WIDTH, SCREEN_HEIGHT,    // set the window to 640 x 480
                          NULL,
                          NULL,
                          hInstance,
						  NULL);

    ShowWindow(hWnd, nCmdShow);

    // set up and initialize Direct3D
    initD3D(hWnd);

    // enter the main loop:

    MSG msg;

    while(TRUE)
    {
        DWORD starting_point = GetTickCount();

        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            if (msg.message == WM_QUIT)
                break;

            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

        render_frame();

		if (KEY_DOWN(VK_ESCAPE))
			PostMessage (hWnd, WM_DESTROY, 0, 0);

        while ((GetTickCount() - starting_point) < 25);
    }

    // clean up DirectX and COM
    cleanD3D();

    return msg.wParam;
}


// this is the main message handler for the program
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch(message)
    {
        case WM_DESTROY:
            {
                PostQuitMessage(0);
                return 0;
            } break;
    }

    return DefWindowProc (hWnd, message, wParam, lParam);
}


// this function initializes and prepares Direct3D for use
void initD3D(HWND hWnd)
{
    d3d = Direct3DCreate9(D3D_SDK_VERSION);    // create the Direct3D interface

    D3DPRESENT_PARAMETERS d3dpp;    // create a struct to hold various device information

    ZeroMemory(&d3dpp, sizeof(d3dpp));    // clear out the struct for use
    d3dpp.Windowed = TRUE;    // program windowed, not fullscreen
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;    // discard old frames
    d3dpp.hDeviceWindow = hWnd;    // set the window to be used by Direct3D
	d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8;
	d3dpp.BackBufferWidth = SCREEN_WIDTH;
	d3dpp.BackBufferHeight = SCREEN_HEIGHT;

    // create a device class using this information and the info from the d3dpp stuct
    d3d->CreateDevice(D3DADAPTER_DEFAULT,
                      D3DDEVTYPE_HAL,
                      hWnd,
                      D3DCREATE_SOFTWARE_VERTEXPROCESSING,
                      &d3dpp,
                      &d3ddev);

	init_graphics();

    return;
}


// this is the function used to render a single frame
void render_frame(void)
{
    // clear the window to a deep blue
    d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);

    d3ddev->BeginScene();    // begins the 3D scene

d3ddev-> SetFVF(CUSTOMFVF);

d3ddev->SetStreamSource(0, t_buffer, 0, sizeof(CUSTOMVERTEX));

d3ddev->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 1);

    d3ddev->EndScene();    // ends the 3D scene

    d3ddev->Present(NULL, NULL, NULL, NULL);   // displays the created frame on the screen

    return;
}


// this is the function that cleans up Direct3D and COM
void cleanD3D(void)
{
	t_buffer->Release();
    d3ddev->Release();    // close and release the 3D device
    d3d->Release();    // close and release Direct3D

    return;
}

//this is where I left off - Derl C
// So I will begin - Derl C

void init_graphics(void)
{
CUSTOMVERTEX t_vert[] =
{
	{320.0f, 50.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 0, 255), },
	{520.0f, 400.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 255, 0), },
	{120.0f, 400.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(255, 0, 0), },

};



d3ddev->CreateVertexBuffer(3*sizeof(CUSTOMVERTEX),
						  0,
						  CUSTOMFVF,
						  D3DPOOL_MANAGED,
						  &t_buffer,
						  NULL);

if (FAILED (hr))
{
	DXTRACE_ERR("function failed: ", hr);
}


VOID* pVoid;

t_buffer->Lock(0, 0, (VOID**)&pVoid, 0);
memcpy(pVoid, t_vert, sizeof (CUSTOMVERTEX));
t_buffer->Unlock();

return;

}