C++ Exercises（十一）

1，

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

#include < d3d9.h >
#pragma warning(disable:4996) // disabledeprecatedwarning
#include < strsafe.h >
#pragma warning(default:4996)

// -----------------------------------------------------------------------------
// Globalvariables
// -----------------------------------------------------------------------------
LPDIRECT3D9g_pD3D = NULL; // UsedtocreatetheD3DDevice
LPDIRECT3DDEVICE9g_pd3dDevice = NULL; // Ourrenderingdevice

// -----------------------------------------------------------------------------
// Name:InitD3D()
// Desc:InitializesDirect3D
// -----------------------------------------------------------------------------
HRESULTInitD3D(HWNDhWnd)
{
//CreatetheD3Dobject,whichisneededtocreatetheD3DDevice.
if(NULL==(g_pD3D=Direct3DCreate9(D3D_SDK_VERSION)))
returnE_FAIL;

//SetupthestructureusedtocreatetheD3DDevice.Mostparametersare
//zeroedout.WesetWindowedtoTRUE,sincewewanttodoD3Dina
//window,andthensettheSwapEffectto"discard",whichisthemost
//efficientmethodofpresentingthebackbuffertothedisplay.And
//werequestabackbufferformatthatmatchesthecurrentdesktopdisplay
//format.
D3DPRESENT_PARAMETERSd3dpp;
ZeroMemory(&d3dpp,sizeof(d3dpp));
d3dpp.Windowed=TRUE;
d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat=D3DFMT_UNKNOWN;

//CreatetheDirect3Ddevice.Hereweareusingthedefaultadapter(most
//systemsonlyhaveone,unlesstheyhavemultiplegraphicshardwarecards
//installed)andrequestingtheHAL(whichissayingwewantthehardware
//deviceratherthanasoftwareone).Softwarevertexprocessingis
//specifiedsinceweknowitwillworkonallcards.Oncardsthatsupport
//hardwarevertexprocessing,though,wewouldseeabigperformancegain
//byspecifyinghardwarevertexprocessing.
if(FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp,&g_pd3dDevice)))
{
returnE_FAIL;
}
//Devicestatewouldnormallybesethere

returnS_OK;
}

// -----------------------------------------------------------------------------
// Name:Cleanup()
// Desc:Releasesallpreviouslyinitializedobjects
// -----------------------------------------------------------------------------
VOIDCleanup()
{
//释放D3D设备对象
if(g_pd3dDevice!=NULL)
g_pd3dDevice->Release();

//释放D3D对象
if(g_pD3D!=NULL)
g_pD3D->Release();
}


// -----------------------------------------------------------------------------
// Name:Render()
// Desc:Drawsthescene
// -----------------------------------------------------------------------------
VOIDRender()
{
if(NULL==g_pd3dDevice)
return;
//Clearthebackbuffertoabluecolor
g_pd3dDevice->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0,0,255),1.0f,0);
//Beginthescene
if(SUCCEEDED(g_pd3dDevice->BeginScene()))
{
//Renderingofsceneobjectscanhappenhere
//Endthescene
g_pd3dDevice->EndScene();
}
//Presentthebackbuffercontentstothedisplay
g_pd3dDevice->Present(NULL,NULL,NULL,NULL);
}

// -----------------------------------------------------------------------------
// Name:MsgProc()
// Desc:Thewindow'smessagehandler
// -----------------------------------------------------------------------------
LRESULTWINAPIMsgProc(HWNDhWnd,UINTmsg,WPARAMwParam,LPARAMlParam)
{
switch(msg)
{
caseWM_DESTROY:
Cleanup();
PostQuitMessage(0);
return0;
caseWM_PAINT:
Render();
ValidateRect(hWnd,NULL);
return0;
}
returnDefWindowProc(hWnd,msg,wParam,lParam);
}


// -----------------------------------------------------------------------------
// Name:WinMain()
// Desc:Theapplication'sentrypoint
// -----------------------------------------------------------------------------
INTWINAPIWinMain(HINSTANCEhInst,HINSTANCE,LPSTR,INT)
{
//Registerthewindowclass
WNDCLASSEXwc={sizeof(WNDCLASSEX),CS_CLASSDC,MsgProc,0L,0L,
GetModuleHandle(NULL),NULL,NULL,NULL,NULL,
"D3DTutorial",NULL};
RegisterClassEx(&wc);
//Createtheapplication'swindow
HWNDhWnd=CreateWindow("D3DTutorial","D3DTutorial01:CreateDevice",
WS_OVERLAPPEDWINDOW,100,100,300,300,
NULL,NULL,wc.hInstance,NULL);
//InitializeDirect3D
if(SUCCEEDED(InitD3D(hWnd)))
{//初始化成功
//Showthewindow
ShowWindow(hWnd,SW_SHOWDEFAULT);
UpdateWindow(hWnd);
//Enterthemessageloop
MSGmsg;
while(true)
{
if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{//消息处理
if(msg.message==WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{//空闲时绘制
Render();
}
}
}
UnregisterClass("D3DTutorial",wc.hInstance);
return0;
}

2，

#include < d3d9.h >
#pragma warning(disable:4996) // disabledeprecatedwarning
#include < strsafe.h >
#pragma warning(default:4996)

LPDIRECT3D9g_pD3D = NULL; // UsedtocreatetheD3DDevice
LPDIRECT3DDEVICE9g_pd3dDevice = NULL; // Ourrenderingdevice
LPDIRECT3DVERTEXBUFFER9g_pVB = NULL; // Buffertoholdvertices顶点缓冲区

// Astructureforourcustomvertextype
struct CUSTOMVERTEX
{
FLOATx,y,z,rhw;//Thetransformedpositionforthevertex
DWORDcolor;//Thevertexcolor
} ;

// OurcustomFVF,whichdescribesourcustomvertexstructure
#define D3DFVF_CUSTOMVERTEX(D3DFVF_XYZRHW|D3DFVF_DIFFUSE)

HRESULTInitD3D(HWNDhWnd)
{
//CreatetheD3Dobject.
if(NULL==(g_pD3D=Direct3DCreate9(D3D_SDK_VERSION)))
returnE_FAIL;

//SetupthestructureusedtocreatetheD3DDevice
D3DPRESENT_PARAMETERSd3dpp;
ZeroMemory(&d3dpp,sizeof(d3dpp));
d3dpp.Windowed=TRUE;
d3dpp.SwapEffect=D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat=D3DFMT_UNKNOWN;

//CreatetheD3DDevice
if(FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp,&g_pd3dDevice)))
{
returnE_FAIL;
}

//Devicestatewouldnormallybesethere

returnS_OK;
}

HRESULTInitVB()
{
//Initializethreeverticesforrenderingatriangle
CUSTOMVERTEXvertices[]=
{
{150.0f,50.0f,0.5f,1.0f,0xffff0000,},//x,y,z,rhw,color
{250.0f,250.0f,0.5f,1.0f,0xff00ff00,},
{50.0f,250.0f,0.5f,1.0f,0xff00ffff,},
};

//Createthevertexbuffer.Hereweareallocatingenoughmemory
//(fromthedefaultpool)toholdallour3customvertices.Wealso
//specifytheFVF,sothevertexbufferknowswhatdataitcontains.
if(FAILED(g_pd3dDevice->CreateVertexBuffer(3*sizeof(CUSTOMVERTEX),
0,D3DFVF_CUSTOMVERTEX,
D3DPOOL_DEFAULT,&g_pVB,NULL)))
{
returnE_FAIL;
}

//Nowwefillthevertexbuffer.Todothis,weneedtoLock()theVBto
//gainaccesstothevertices.Thismechanismisrequiredbecuasevertex
//buffersmaybeindevicememory.
VOID*pVertices;
if(FAILED(g_pVB->Lock(0,sizeof(vertices),(void**)&pVertices,0)))
returnE_FAIL;
memcpy(pVertices,vertices,sizeof(vertices));
g_pVB->Unlock();

returnS_OK;
}
VOIDCleanup()
{
if(g_pVB!=NULL)
g_pVB->Release();

if(g_pd3dDevice!=NULL)
g_pd3dDevice->Release();

if(g_pD3D!=NULL)
g_pD3D->Release();
}

VOIDRender()
{
//Clearthebackbuffertoabluecolor
g_pd3dDevice->Clear(0,NULL,D3DCLEAR_TARGET,D3DCOLOR_XRGB(0,0,255),1.0f,0);

//Beginthescene
if(SUCCEEDED(g_pd3dDevice->BeginScene()))
{
//Drawthetrianglesinthevertexbuffer.
g_pd3dDevice->SetStreamSource(0,g_pVB,0,sizeof(CUSTOMVERTEX));
g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST,0,1);

//Endthescene
g_pd3dDevice->EndScene();
}

//Presentthebackbuffercontentstothedisplay
g_pd3dDevice->Present(NULL,NULL,NULL,NULL);
}

LRESULTWINAPIMsgProc(HWNDhWnd,UINTmsg,WPARAMwParam,LPARAMlParam)
{
switch(msg)
{
caseWM_DESTROY:
Cleanup();
PostQuitMessage(0);
return0;
}

returnDefWindowProc(hWnd,msg,wParam,lParam);
}


INTWINAPIWinMain(HINSTANCEhInst,HINSTANCE,LPSTR,INT)
{
//Registerthewindowclass
WNDCLASSEXwc={sizeof(WNDCLASSEX),CS_CLASSDC,MsgProc,0L,0L,
GetModuleHandle(NULL),NULL,NULL,NULL,NULL,
"D3DTutorial",NULL};
RegisterClassEx(&wc);
//Createtheapplication'swindow
HWNDhWnd=CreateWindow("D3DTutorial","D3DTutorial01:CreateDevice",
WS_OVERLAPPEDWINDOW,100,100,300,300,
NULL,NULL,wc.hInstance,NULL);
//InitializeDirect3D
if(SUCCEEDED(InitD3D(hWnd)))
{//初始化成功
//Createthevertexbuffer
if(SUCCEEDED(InitVB()))
{
//Showthewindow
ShowWindow(hWnd,SW_SHOWDEFAULT);
UpdateWindow(hWnd);
//Enterthemessageloop
MSGmsg;
while(true)
{
if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{//消息处理
if(msg.message==WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{//空闲时绘制
Render();
}
}
}
}
UnregisterClass("D3DTutorial",wc.hInstance);
return0;
}