Definitions and Global Variables

The following code is the first lines of the Helworld.c example. This is the only file required to build this application; no other header files or source files are needed.

Notice that INITGUID must be defined prior to all other includes and defines. This is a crucial point that is sometimes missed by developers who are new to DirectX.

/////////////////////////////////////////////////////////////////////

//

// Copyright (C) 1996 Microsoft Corporation. All Rights Reserved.

//

// File: Helworld.c

//

// Simplified Direct3D Retained-Mode example, based on

// the "Globe" SDK sample.

//

/////////////////////////////////////////////////////////////////////

#define INITGUID // Must precede other defines and includes

#include <windows.h>

#include <malloc.h> // Required by memset call

#include <d3drmwin.h>

#define MAX_DRIVERS 5 // Maximum D3D drivers expected

// Global variables

LPDIRECT3DRM lpD3DRM; // Direct3DRM object

LPDIRECTDRAWCLIPPER lpDDClipper;// DirectDrawClipper object

struct _myglobs {

LPDIRECT3DRMDEVICE dev; // Direct3DRM device

LPDIRECT3DRMVIEWPORT view; // Direct3DRM viewport through which

// the scene is viewed

LPDIRECT3DRMFRAME scene; // Master frame in which others are

// placed

LPDIRECT3DRMFRAME camera; // Frame describing the user's POV

GUID DriverGUID[MAX_DRIVERS]; // GUIDs of available D3D drivers

char DriverName[MAX_DRIVERS][50]; // Names of available D3D drivers

int NumDrivers; // Number of available D3D drivers

int CurrDriver; // Number of D3D driver currently

// being used

BOOL bQuit; // Program is about to terminate

BOOL bInitialized; // All D3DRM objects are initialized

BOOL bMinimized; // Window is minimized

int BPP; // Bit depth of the current display mode

} myglobs;

// Function prototypes.

static BOOL InitApp(HINSTANCE, int);

long FAR PASCAL WindowProc(HWND, UINT, WPARAM, LPARAM);

static BOOL EnumDrivers(HWND win);

static HRESULT WINAPI enumDeviceFunc(LPGUID lpGuid,

LPSTR lpDeviceDescription, LPSTR lpDeviceName,

LPD3DDEVICEDESC lpHWDesc, LPD3DDEVICEDESC lpHELDesc,

LPVOID lpContext);

static DWORD BPPToDDBD(int bpp);

static BOOL CreateDevAndView(LPDIRECTDRAWCLIPPER lpDDClipper,

int driver, int width, int height);

static BOOL SetRenderState(void);

static BOOL RenderLoop(void);

static BOOL MyScene(LPDIRECT3DRMDEVICE dev, LPDIRECT3DRMVIEWPORT view,

LPDIRECT3DRMFRAME scene, LPDIRECT3DRMFRAME camera);

void MakeMyFrames(LPDIRECT3DRMFRAME lpScene, LPDIRECT3DRMFRAME lpCamera,

LPDIRECT3DRMFRAME * lplpLightFrame1,

LPDIRECT3DRMFRAME * lplpWorld_frame);

void MakeMyLights(LPDIRECT3DRMFRAME lpScene, LPDIRECT3DRMFRAME lpCamera,

LPDIRECT3DRMFRAME lpLightFrame1,

LPDIRECT3DRMLIGHT * lplpLight1, LPDIRECT3DRMLIGHT * lplpLight2);

void SetMyPositions(LPDIRECT3DRMFRAME lpScene,

LPDIRECT3DRMFRAME lpCamera, LPDIRECT3DRMFRAME lpLightFrame1,

LPDIRECT3DRMFRAME lpWorld_frame);

void MakeMyMesh(LPDIRECT3DRMMESHBUILDER * lplpSphere3_builder);

void MakeMyWrap(LPDIRECT3DRMMESHBUILDER sphere3_builder,

LPDIRECT3DRMWRAP * lpWrap);

void AddMyTexture(LPDIRECT3DRMMESHBUILDER lpSphere3_builder,

LPDIRECT3DRMTEXTURE * lplpTex);

static void CleanUp(void);