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【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈

代碼里面寫了詳盡的注釋！點擊這里下載工程（使用VS2003 ＋ OCT 2006?DirectSDK 編譯）
請看考這里【轉貼】Render to Texture（渲染到紋理）

#include? < D3DX9.h >

#include? < string >

typedef?std:: string ?String;

#define ?SAFE_RELEASE(o)?{if(o){o->Release();o?=?0;}}

LPDIRECT3D9?g_pD3D? = ? 0 ;???????????????? // ?D3D?Driver

LPDIRECT3DDEVICE9?g_pd3dDevice? = ? 0 ;???? // ?D3D?設備

D3DCAPS9?g_Caps? = ? {(D3DDEVTYPE) 0 } ;???? // ?D3D?的帽子

LPD3DXMESH?g_pMeshTeapot? = ? 0 ;???? // ?茶壺頂點緩沖區

LPDIRECT3DVERTEXBUFFER9?g_pVB? = ? 0 ;???? // ?頂點緩沖區

LPDIRECT3DINDEXBUFFER9?g_pIB? = ? 0 ;???? // ?索引緩沖區

LPDIRECT3DTEXTURE9?g_pTexture? = ? 0 ;???? // ?貼圖

LPDIRECT3DTEXTURE9?g_pRenderTexture? = ? 0 ;???? // ?渲染到貼圖

LPDIRECT3DSURFACE9?g_pRenderSurface? = ? 0 ;???? // ?渲染到貼圖的表面

// ?頂點定義

#define ?D3DFVF_CUSTOMVERTEX?(D3DFVF_XYZ?|?D3DFVF_DIFFUSE?|?D3DFVF_TEX1)

struct ?CUSTOMVERTEX

{

????D3DXVECTOR3?position;

????D3DCOLOR?color;

???? float ?u?,?v;

} ;

// ?錯誤記錄

void ?D3DErr(String?strMsg)

{

????MessageBox( 0 ?,?strMsg.c_str()?,? " 錯誤 " ?,?MB_OK);

}

// ?初始化頂點緩沖區

HRESULT?InitVB()

{

???? // ?創建茶壺

???? if (FAILED(D3DXCreateTeapot(g_pd3dDevice?,? & g_pMeshTeapot?,? 0 )))

???????? return ?E_FAIL;

???? // ?創建頂點緩沖區

???? if (FAILED(g_pd3dDevice -> CreateVertexBuffer( 4 ? * ? sizeof (CUSTOMVERTEX)?,? 0 ?,?D3DFVF_CUSTOMVERTEX?,?D3DPOOL_DEFAULT?,? & g_pVB?,? 0 )))

???????? return ?E_FAIL;

????CUSTOMVERTEX? * pVertecies;

???? // ?鎖定緩沖區

???? if (SUCCEEDED(g_pVB -> Lock( 0 ?,? 0 ?,?( void ** ) & pVertecies?,? 0 )))

???? {

????????pVertecies[ 0 ].position? = ?D3DXVECTOR3( - 1 ?,? 1 ?,? 0 );

????????pVertecies[ 1 ].position? = ?D3DXVECTOR3( - 1 ?,? - 1 ?,? 0 );

????????pVertecies[ 2 ].position? = ?D3DXVECTOR3( 1 ?,? 1 ?,? 0 );

????????pVertecies[ 3 ].position? = ?D3DXVECTOR3( 1 ?,? - 1 ?,? 0 );

????????pVertecies[ 0 ].u? = ? 0 ;

????????pVertecies[ 0 ].v? = ? 0 ;

????????pVertecies[ 1 ].u? = ? 0 ;

????????pVertecies[ 1 ].v? = ? 1 ;

????????pVertecies[ 2 ].u? = ? 1 ;

????????pVertecies[ 2 ].v? = ? 0 ;

????????pVertecies[ 3 ].u? = ? 1 ;

????????pVertecies[ 3 ].v? = ? 1 ;

????????pVertecies[ 0 ].color? = ? 0xFFFFFFFF ;

????????pVertecies[ 1 ].color? = ? 0xFFFFFFFF ;

????????pVertecies[ 2 ].color? = ? 0xFFFFFFFF ;

????????pVertecies[ 3 ].color? = ? 0xFFFFFFFF ;

????????g_pVB -> Unlock();

????}

???? else

???? {

???????? return ?E_FAIL;

????}

???? // ?載入紋理

???? if (FAILED(D3DXCreateTextureFromFile(g_pd3dDevice?,? " ..\\BRICE.JPG " ?,? & g_pTexture)))

???? {

????????D3DErr( " 無法載入紋理Brice.jpg " );

???????? return ?E_FAIL;

????}

???? // ?創建渲染到貼圖的表面

???? if (FAILED(g_pd3dDevice -> CreateTexture( 512 ?,? 512 ?,? 1 ?,?D3DUSAGE_RENDERTARGET?,?D3DFMT_A8R8G8B8?,?D3DPOOL_DEFAULT?,? & g_pRenderTexture?,? 0 )))

???? {

????????D3DErr( " 無法創建渲染貼圖 " );

???????? return ?E_FAIL;

????}

???? // ?獲取貼圖的渲染表面

???? if (FAILED(g_pRenderTexture -> GetSurfaceLevel( 0 ?,? & g_pRenderSurface)))

???? {

???????? return ?E_FAIL;

????}

???? return ?S_OK;

}

// ?初始化模型

HRESULT?InitGeometry()

{

???? // ?創建頂點緩沖區

???? if (FAILED(InitVB()))

???????? return ?E_FAIL;

???? return ?S_OK;

}

// ?設置矩陣變換

void ?SetTransform()

{

???? // ?世界變換

????D3DXMATRIX?matWorld;

????D3DXMatrixIdentity( & matWorld);

???? // ?設置世界矩陣

????g_pd3dDevice -> SetTransform(D3DTS_WORLD?,? & matWorld);

???? // ?Set?up?our?view?matrix.?A?view?matrix?can?be?defined?given?an?eye?point,

???? // ?a?point?to?lookat,?and?a?direction?for?which?way?is?up.?Here,?we?set?the

???? // ?eye?five?units?back?along?the?z-axis?and?up?three?units,?look?at?the

???? // ?origin,?and?define?"up"?to?be?in?the?y-direction.

???? // ?視口變換

????D3DXMATRIX?matView;

????D3DXMatrixLookAtLH( & matView?,? & D3DXVECTOR3( 0 ?,? 0 ?,? - 5 )

????????,? & D3DXVECTOR3( 0 ?,? 0 ?,? 0 )?

????????,? & D3DXVECTOR3( 0 ?,? 1 ?,? 0 ));

????g_pd3dDevice -> SetTransform(D3DTS_VIEW?,? & matView);

???? // ?For?the?projection?matrix,?we?set?up?a?perspective?transform?(which

???? // ?transforms?geometry?from?3D?view?space?to?2D?viewport?space,?with

???? // ?a?perspective?divide?making?objects?smaller?in?the?distance).?To?build

???? // ?a?perpsective?transform,?we?need?the?field?of?view?(1/4?pi?is?common),

???? // ?the?aspect?ratio,?and?the?near?and?far?clipping?planes?(which?define?at

???? // ?what?distances?geometry?should?be?no?longer?be?rendered).

????D3DXMATRIXA16?matProj;

????D3DXMatrixPerspectiveFovLH(? & matProj,?D3DX_PI / 4 ,? 800.0f ? / ? 600.0f ,? 1.0f ,? 100.0f ?);

????g_pd3dDevice -> SetTransform(?D3DTS_PROJECTION,? & matProj?);

}

// ?渲染場景

void ?Render()

{

???? if (g_pd3dDevice)

???? {

????????LPDIRECT3DSURFACE9?pRenderTarget;

???????? // ?保存渲染表面

????????g_pd3dDevice -> GetRenderTarget( 0 ?,? & pRenderTarget);

???????? // ?設置我們的貼圖表面

????????g_pd3dDevice -> SetRenderTarget( 0 ?,?g_pRenderSurface);

???????? // ?清空場景，渲染到貼圖的背景是藍色的

????????g_pd3dDevice -> Clear( 0 ?,? 0 ?,?D3DCLEAR_TARGET? | ?D3DCLEAR_ZBUFFER?,?D3DCOLOR_XRGB( 0 ?,? 0 ?,? 0xFF )?,? 1 ?,? 0 );

???????? // ?開始渲染到貼圖

???????? if (SUCCEEDED(g_pd3dDevice -> BeginScene()))

???????? {

???????????? // ?設置通常的矩陣

????????????SetTransform();

????????????D3DXMATRIX?matWorld;

???????????? // ?旋轉茶壺

????????????D3DXMatrixRotationAxis( & matWorld?,? & D3DXVECTOR3( 1 ?,? 0 ?, 1 )?,?D3DX_PI? * ? 2.0f ? * ?(timeGetTime()? % ? 5000 )? / ? 5000.0f );

????????????g_pd3dDevice -> SetTransform(D3DTS_WORLD?,? & matWorld);

???????????? // ?設置渲染到表面的投影矩陣（這里可有可無，因為我們的窗口創建是512×512的）

????????????D3DXMATRIXA16?matProj;

????????????D3DXMatrixPerspectiveFovLH(? & matProj,?D3DX_PI / 4 ,? 1.0f ,? 1.0f ,? 100.0f ?);

????????????g_pd3dDevice -> SetTransform(?D3DTS_PROJECTION,? & matProj?);

???????????? // ?設置貼圖

????????????g_pd3dDevice -> SetTexture( 0 ?,?g_pTexture);

????????????g_pd3dDevice -> SetSamplerState( 0 ?,?D3DSAMP_ADDRESSU?,?D3DTADDRESS_MIRROR);

????????????g_pd3dDevice -> SetSamplerState( 0 ?,?D3DSAMP_ADDRESSV?,?D3DTADDRESS_MIRROR);

???????????? // ?自動生成紋理坐標

????????????g_pd3dDevice -> SetTextureStageState( 0 ,?D3DTSS_TEXTURETRANSFORMFLAGS,?D3DTTFF_COUNT2);

????????????g_pd3dDevice -> SetTextureStageState( 0 ,?D3DTSS_TEXCOORDINDEX,?D3DTSS_TCI_SPHEREMAP);

????????????g_pd3dDevice -> SetRenderState(D3DRS_LIGHTING?,?FALSE);

???????????? // ?渲染茶壺

????????????g_pMeshTeapot -> DrawSubset( 0 );

????????????g_pd3dDevice -> EndScene();

????????}

???????? // ?恢復渲染表面為顯示器

????????g_pd3dDevice -> SetRenderTarget( 0 ?,?pRenderTarget);

???????? // ?清空場景，真實場景是紅色背景的

????????g_pd3dDevice -> Clear( 0 ?,? 0 ?,?D3DCLEAR_TARGET? | ?D3DCLEAR_ZBUFFER?,?D3DCOLOR_XRGB( 0xFF ?,? 0xFF ?,? 0 )?,? 1 ?,? 0 );

???????? // ?開始渲染真實場景

???????? if (SUCCEEDED(g_pd3dDevice -> BeginScene()))

???????? {

????????????SetTransform();

????????????D3DXMATRIX?matWorld;

???????????? // ?旋轉表面

????????????D3DXMatrixRotationAxis( & matWorld?,? & D3DXVECTOR3( 1 ?,? 1 ?, 0 )?,?sinf(D3DX_PI? * ? 2.0f ? * ?(timeGetTime()? % ? 5000 )? / ? 5000.0f ));

???????????? // ?設置世界矩陣

????????????g_pd3dDevice -> SetTransform(D3DTS_WORLD?,? & matWorld);

???????????? // ?設置已經渲染到表面的貼圖

????????????g_pd3dDevice -> SetTexture( 0 ?,?g_pRenderTexture);

????????????g_pd3dDevice -> SetTextureStageState( 0 ,?D3DTSS_TEXTURETRANSFORMFLAGS,?D3DTTFF_COUNT2);

????????????g_pd3dDevice -> SetTextureStageState( 0 ,?D3DTSS_TEXCOORDINDEX,? 0 );

????????????g_pd3dDevice -> SetSamplerState( 0 ?,?D3DSAMP_ADDRESSU?,?D3DTADDRESS_MIRROR);

????????????g_pd3dDevice -> SetSamplerState( 0 ?,?D3DSAMP_ADDRESSV?,?D3DTADDRESS_MIRROR);

????????????g_pd3dDevice -> SetRenderState(D3DRS_LIGHTING?,?FALSE);

???????????? // g_pd3dDevice->SetRenderState(D3DRS_FILLMODE?,?D3DFILL_WIREFRAME);

????????????g_pd3dDevice -> SetStreamSource( 0 ?,?g_pVB?,? 0 ?,? sizeof (CUSTOMVERTEX));

????????????g_pd3dDevice -> SetFVF(D3DFVF_CUSTOMVERTEX);

????????????g_pd3dDevice -> DrawPrimitive(D3DPT_TRIANGLESTRIP?,? 0 ?,? 2 );

????????????g_pd3dDevice -> EndScene();

????????}

???????? // ?顯示

????????g_pd3dDevice -> Present( 0 ?,? 0 ?,? 0 ?,? 0 );

????}

}

// ?初始化?D3D?設備

HRESULT?InitD3D(HWND?hWnd)

{

???? // ?創建?D3D?Driver

???? if (NULL? == ?(g_pD3D? = ?Direct3DCreate9(D3D_SDK_VERSION)))

???? {

????????D3DErr( " 無法創建Direct3D9設備 " );

???????? return ?E_FAIL;

????}

???? // ?獲取當前顯示模式

????D3DDISPLAYMODE?d3ddm;

???? if (FAILED(g_pD3D -> GetAdapterDisplayMode(D3DADAPTER_DEFAULT?,? & d3ddm)))

???? {

????????D3DErr( " 無法獲取D3D顯示器模式 " );

???????? return ?E_FAIL;

????}

????RECT?rect;

????::GetClientRect(hWnd?,? & rect);

???? // ?填充參數

????D3DPRESENT_PARAMETERS?d3dpp;

????memset( & d3dpp?,? 0 ?,? sizeof (d3dpp));

????d3dpp.BackBufferFormat? = ?d3ddm.Format;

????d3dpp.BackBufferWidth? = ?rect.right;

????d3dpp.BackBufferHeight? = ?rect.bottom;

????d3dpp.SwapEffect? = ?D3DSWAPEFFECT_DISCARD;

????d3dpp.Windowed? = ? true ;

????d3dpp.AutoDepthStencilFormat? = ?D3DFMT_D16;

????d3dpp.EnableAutoDepthStencil? = ?TRUE;

???? // ?獲取帽子

???? if (FAILED(g_pD3D -> GetDeviceCaps(D3DADAPTER_DEFAULT?,?D3DDEVTYPE_HAL?,? & g_Caps)))

???? {

????????D3DErr( " 獲取D3D?帽子時發生錯誤 " );

???????? return ?E_FAIL;

????}

???? // ?創建D3D設備

???? if (FAILED(g_pD3D -> CreateDevice(D3DADAPTER_DEFAULT

????????,?D3DDEVTYPE_HAL

????????,?hWnd

???????? // ?檢查是否支持硬件頂點處理

????????,?g_Caps.DevCaps? & ?D3DDEVCAPS_HWTRANSFORMANDLIGHT? ? ?D3DCREATE_HARDWARE_VERTEXPROCESSING?:?D3DCREATE_SOFTWARE_VERTEXPROCESSING

????????,? & d3dpp

????????,? & g_pd3dDevice

????????)

????????))

???? {

????????D3DErr( " 創建D3D設備時發生錯誤 " );

???????? return ?E_FAIL;

????}

????g_pd3dDevice -> SetRenderState(?D3DRS_CULLMODE,?D3DCULL_NONE?);

????g_pd3dDevice -> SetRenderState(?D3DRS_ZENABLE,?TRUE?);

???? if (FAILED(InitGeometry()))

???????? return ?E_FAIL;

???? return ?S_OK;

}

// ?清空所有占用的資源

void ?CleanUp()

{

????SAFE_RELEASE(g_pTexture);

????SAFE_RELEASE(g_pIB);

????SAFE_RELEASE(g_pVB);

????SAFE_RELEASE(g_pd3dDevice);

????SAFE_RELEASE(g_pD3D);

}

// ?消息處理

LRESULT?WINAPI?MsgProc(HWND?hWnd?,?UINT?message?,?WPARAM?wParam?,?LPARAM?lParam)

{

???? switch (message)

???? {

???? case ?WM_DESTROY:

????????CleanUp();

????????PostQuitMessage( 0 );

???????? break ;

????}

???? return ?::DefWindowProc(hWnd,?message?,?wParam?,?lParam);

}

// ?Windows?入口

int ?WINAPI?WinMain(IN?HINSTANCE?hInstance,?IN?HINSTANCE?hPrevInstance,?IN?LPSTR?lpCmdLine,?IN? int ?nShowCmd?)

{

????WNDCLASS?wndClass;

????memset( & wndClass?,? 0 ?,? sizeof (wndClass));

????wndClass.hInstance? = ?hInstance;

????wndClass.lpszClassName? = ? " 渲染到紋理 " ;

????wndClass.lpfnWndProc? = ?MsgProc;

????RegisterClass( & wndClass);

???? // ?創建窗口

????HWND?hWnd? = ?CreateWindow( " 渲染到紋理 " ?,? " 渲染到紋理！ " ?

????????,? 0 ?,? 0 ?,? 0 ?,? 640 ?, 480 ?,?GetDesktopWindow()

????????,? 0 ?,?wndClass.hInstance?,? 0 );

???? // ?顯示窗口

????ShowWindow(hWnd?,?SW_SHOWDEFAULT);

????UpdateWindow(hWnd);

???? // ?初始化?D3D?設備

???? if (SUCCEEDED(InitD3D(hWnd)))

???? {

???????? // ?消息處理循環

????????MSG?msg;

????????memset( & msg?,? 0 ?,? sizeof (msg));

???????? while (msg.message? != ?WM_QUIT)

???????? {

???????????? if (PeekMessage( & msg?,? 0 ?,? 0 ?,? 0 ?,?PM_REMOVE))

???????????? {

????????????????TranslateMessage( & msg);

????????????????DispatchMessage( & msg);

????????????}

???????????? else

???????????? {

????????????????Render();

????????????}

????????}

????}

???? // ?清空場景

????CleanUp();

????UnregisterClass( " 渲染到紋理 " ?,?wndClass.hInstance);

???? return ? 0 ;

}

posted on 2006-11-17 09:18 李錦俊(mybios) 閱讀(3588) 評論(9) 編輯收藏引用所屬分類: Direct3D

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# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2007-10-24 15:00 鹿人甲

"獲取D3D 帽子時發生錯誤"
這位大哥你是認真的么？回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2007-12-26 17:29 魯人乙

”鹿人甲“
樓上的你是認真的么？回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2008-03-27 18:09 kaka

不錯的例子,學習回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2008-06-26 23:27 xiaoliuqiao

我運行的結果怎么不對啊？？？？？？？？？回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2008-08-01 19:59 zhizhi

我運行出來的結果也不對啊，都出不來茶壺，怎么回事啊？回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈[未登錄] 2009-01-06 10:01 fred

看了你的文章，我最經也在做RTT，碰到個問題，具體到你這個例子的話，你的茶壺是渲染在一個紋理上，紋理的背景是藍色，請問，如何讓你紋理中的藍色背景透明呢？？回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2009-01-08 21:00 李錦俊

@fred
首先，你得把RTT的視口背景色設置成0,0,0,0，就完全透明了。
然后，把RTT的圖渲染到屏幕上時，要設置渲染狀態成透明渲染。回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2010-10-16 16:29 mz

在vs2005下跑，怎么是錯誤的，顯示不了茶壺，而且整個四方形的貼圖是亂的，這是什么原因？回復更多評論

# re: 【原創】今天參照轉貼的渲染到紋理做了一個例子，效果還不錯，哈哈 2016-08-04 20:05 syk

我運行的結果也不對啊回復更多評論

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