通过ID3DXSprite来实现DirectX 9.0C绘制2D动画

最近我一直在不停地问有关2D游戏制做的技术。继上一篇DirectX9中的二维图片的加载以后，我再发一篇关于通过ID3DXSprite来实现DirectX 9.0C绘制2D动画的帖子，希望对大家有所帮助。 在DirectX 8以前，2D都是DirectDraw来完成的，是Direct中非常重要的一个部分，但是到了DirectX 8以后，DirectDraw被合并到DirectX Graphics 当中了，所以在那以后就很少有人谈到如何用DirectX Graphics 实现2D效果。大多数需要2D的人都不辞辛苦用DirectDraw来实现了，毕竟用Direct 7的东西，后面的都是支持的。但是正如一个老外说的，喜欢用DirectDraw的人用用也无所谓，从Direct 8 以后学习的人再去学DirectDraw就不合适了，那么怎么实现自己需要的2D效果呢？我接触到了3种方法DirectX9中的二维图片的加载就是其中之一，这里我们要讲的是第二种通过ID3DXSprite来实现DirectX 9.0C绘制2D动画 前一种方法我们说过了，是单纯的图片加入，对于游戏而言没有太大的用处，游戏里面毕竟动态的东西比较多，怎么让他动起来呢？我们先看一下源代码。 （本帖子不分析代码，主要留作讨论。代码分析在《超级马里奥.net游戏代码完全分析》中，欢迎下载） 以下代码在 Microsoft DirectX 9.0 SDK Update (August 2005）环境运行通过，如果遇到编译不通过在下面留言。 把SDK中底个例子（纹理）中的banana.bmp（或者自己找一个不要太小的bmp文件）考到你的程序目录下。 //-----------------------------------------------------------------------------#include <d3dX9.h> //-----------------------------------------------------------------------------LPDIRECT3D9             g_pD3D       = NULL; LPDIRECT3DDEVICE9       g_pd3dDevice = NULL;LPDIRECT3DVERTEXBUFFER9 g_pVB        = NULL; LPDIRECT3DTEXTURE9  g_pTexture  = NULL;LPD3DXSPRITE   g_pSprite  = NULL; struct CUSTOMVERTEX{    FLOAT x, y, z, rhw;     DWORD color;       }; #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE) RECT rct; //-----------------------------------------------------------------------------HRESULT InitD3D( HWND hWnd ){ SetRect( &rct, 0,200, 100, 250 );     if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )        return E_FAIL;     D3DPRESENT_PARAMETERS d3dpp;    ZeroMemory( &d3dpp, sizeof(d3dpp) );    d3dpp.Windowed = TRUE;    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;    d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;         if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,                                      D3DCREATE_SOFTWARE_VERTEXPROCESSING,                                      &d3dpp, &g_pd3dDevice ) ) )    {        return E_FAIL;    }     g_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );     g_pd3dDevice->SetRenderState( D3DRS_LIGHTING, FALSE );  D3DXCreateSprite( g_pd3dDevice, &g_pSprite );      if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, "banana.bmp", &g_pTexture ) ) )    {         if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, "..\\banana.bmp", &g_pTexture ) ) )        {            MessageBox(NULL, "Could not find banana.bmp", "Textures.exe", MB_OK);            return E_FAIL;        }    }     g_pd3dDevice->SetRenderState( D3DRS_ZENABLE, TRUE ); g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE); g_pd3dDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA); g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA); g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);    return S_OK;} //-----------------------------------------------------------------------------HRESULT InitVB(){    CUSTOMVERTEX vertices[] =    {        { 50.0f,  50.0f, 0.5f, 1.0f, 0xffff0000, }, // x, y, z, rhw, color        { 250.0f, 50.0f, 0.5f, 1.0f, 0xff00ff00, },        { 50.0f, 250.0f, 0.5f, 1.0f, 0xff00ffff, },  { 250.0f, 250.0f, 0.5f,1.0f, 0xff00ffff, },    };     if( FAILED( g_pd3dDevice->CreateVertexBuffer( 4*sizeof(CUSTOMVERTEX),                                                  0, D3DFVF_CUSTOMVERTEX,                                                  D3DPOOL_DEFAULT, &g_pVB, NULL ) ) )    {        return E_FAIL;    }        VOID* pVertices;    if( FAILED( g_pVB->Lock( 0, sizeof(vertices), (void**)&pVertices, 0 ) ) )        return E_FAIL;    memcpy( pVertices, vertices, sizeof(vertices) );    g_pVB->Unlock();     return S_OK;} //-----------------------------------------------------------------------------VOID Cleanup(){    if( g_pVB != NULL )                g_pVB->Release();     if( g_pd3dDevice != NULL )         g_pd3dDevice->Release();     if( g_pD3D != NULL )               g_pD3D->Release();} VOID Render() { g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,255), 1.0f, 0 );     if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )    {     g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof(CUSTOMVERTEX) );        g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );        g_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 2 );   if ( SUCCEEDED( g_pSprite->Begin(D3DXSPRITE_ALPHABLEND) ) )  {   rct.right +=1;   rct.left +=1;       g_pSprite->Draw(g_pTexture, &rct, NULL, NULL, 0xffffffff);   g_pSprite->End();  }                g_pd3dDevice->EndScene();    }        g_pd3dDevice->Present( NULL, NULL, NULL, NULL );}   LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ){    switch( msg )    {        case WM_DESTROY:            Cleanup();            PostQuitMessage( 0 );            return 0;    }     return DefWindowProc( hWnd, msg, wParam, lParam );}   INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT ){       WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,                      GetModuleHandle(NULL), NULL, NULL, NULL, NULL,                      "D3D Tutorial", NULL };    RegisterClassEx( &wc );     HWND hWnd = CreateWindow( "D3D Tutorial", "D3D Tutorial 02: Vertices",                              WS_OVERLAPPEDWINDOW, 100, 100, 300, 300,                              GetDesktopWindow(), NULL, wc.hInstance, NULL );     if( SUCCEEDED( InitD3D( hWnd ) ) )    {                if( SUCCEEDED( InitVB() ) )        {                   ShowWindow( hWnd, SW_SHOWDEFAULT );            UpdateWindow( hWnd );                     MSG msg;            ZeroMemory( &msg, sizeof(msg) );            while( msg.message!=WM_QUIT )            {                if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )                {                    TranslateMessage( &msg );                    DispatchMessage( &msg );                }                else                    Render();            }        }    }     UnregisterClass( "D3D Tutorial", wc.hInstance );    return 0;}