DirectX 9.0 C++ 课程使用3ds max 创建的模型 xfile，mesh

DirectX 9.0 C++ 教程使用3ds max 创建的模型 xfile，mesh

效果图：一个旋转的带纹理的“兵”模型。

1.在开始编程之前，还是要了解下像3ds max 是如何导出我们要用的.x 后缀文件。

下面这图是我在3ds max中按照 tutorial 中创建的，多了木板纹理，3Ds max中给物体加纹理可以参考3Ds max tutorial中的Materials and Mapping Tutorials。最后我们这里注意要把模型的中心移到坐标的中心，这样我们稍后转换成.x后缀文件，在DirectX中显示才会在中心。

DirectX 9.0 C++ 课程使用3ds max 创建的模型 xfile，mesh

3ds max导出XFile 文件，要用到一个叫做Panda 的插件。下载地址：http://download.csdn.net/detail/fox64194167/4649423 (CSDN下载，免积分)。复制到3ds max的安装目录下的plugins。重启3ds max，对一个.max文件选择文件(File)下的导出(Export)，下拉选择x文件格式即可。不知道为什么有些模型导出.x文件会失败。我们可以用记事本打开.x文件，可以看到很多顶点定义。也可以搜下TextureFilename，就可以看到纹理图片名字。不过很奇怪，我用3DS max的时候，用的纹理图片是wood.boards.jpg，这里却变成了wood.boards.bmp，可能纹理不支持jpg格式的图片？有时候导出.x文件放在DirectX中使用没有纹理就要多注意下纹理图片格式。



3.加载XFile
//-----------------------------------------// File: Meshes.cpp//// Desc: For advanced geometry, most apps will prefer to load pre-authored//       Meshes from a file. Fortunately, when using Meshes, D3DX does most of//       the work for this, parsing a geometry file and creating vertx buffers//       (and index buffers) for us. This tutorial shows how to use a D3DXMESH//       object, including loading it from a file and rendering it. One thing//       D3DX does not handle for us is the materials and textures for a mesh,//       so note that we have to handle those manually.////       Note: one advanced (but nice) feature that we don't show here is that//       when cloning a mesh we can specify the FVF. So, regardless of how the//       mesh was authored, we can add/remove normals, add more texture//       coordinate sets (for multi-texturing), etc.//// Copyright (c) Microsoft Corporation. All rights reserved.//-----------------------------------------#include &lt;Windows.h&gt;#include &lt;mmsystem.h&gt;#include &lt;d3dx9.h&gt;#include &lt;strsafe.h&gt;//-----------------------------------------// Global variables//-----------------------------------------LPDIRECT3D9             g_pD3D           = NULL; // Used to create the D3DDeviceLPDIRECT3DDEVICE9       g_pd3dDevice     = NULL; // Our rendering deviceLPD3DXMESH              g_pMesh          = NULL; // Our mesh object in sysmemD3DMATERIAL9*           g_pMeshMaterials = NULL; // Materials for our meshLPDIRECT3DTEXTURE9*     g_pMeshTextures  = NULL; // Textures for our meshDWORD                   g_dwNumMaterials = 0L;   // Number of mesh materials//-----------------------------------------// Name: InitD3D()// Desc: Initializes Direct3D//-----------------------------------------HRESULT InitD3D( HWND hWnd ){    // Create the D3D object.    if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )        return E_FAIL;    // Set up the structure used to create the D3DDevice. Since we are now    // using more complex geometry, we will create a device with a zbuffer.    D3DPRESENT_PARAMETERS d3dpp;     ZeroMemory( &d3dpp, sizeof(d3dpp) );    d3dpp.Windowed = TRUE;    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;    d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;    d3dpp.EnableAutoDepthStencil = TRUE;    d3dpp.AutoDepthStencilFormat = D3DFMT_D16;d3dpp.MultiSampleType            = D3DMULTISAMPLE_NONE;d3dpp.MultiSampleQuality         = 0;    // Create the D3DDevice    if( FAILED( g_pD3D-&gt;CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,                                      D3DCREATE_SOFTWARE_VERTEXPROCESSING,                                      &d3dpp, &g_pd3dDevice ) ) )    {        return E_FAIL;    }    // Turn on the zbuffer    g_pd3dDevice-&gt;SetRenderState( D3DRS_ZENABLE, TRUE );    // Turn on ambient lighting     g_pd3dDevice-&gt;SetRenderState( D3DRS_AMBIENT, 0xffffffff );    return S_OK;}//-----------------------------------------// Name: InitGeometry()// Desc: Load the mesh and build the material and texture arrays//-----------------------------------------HRESULT InitGeometry(){    LPD3DXBUFFER pD3DXMtrlBuffer;    ID3DXBuffer* adjBuffer  = 0;HRESULT hr = 0;    // Load the mesh from the specified file    if( FAILED( D3DXLoadMeshFromX( "pawn-texture.x", D3DXMESH_SYSTEMMEM,                                    g_pd3dDevice, &adjBuffer,                                    &pD3DXMtrlBuffer, NULL, &g_dwNumMaterials,                                    &g_pMesh ) ) )    {// If xfile is not in current folder, try parent folder//这样做主要是为了运行Debug中的Meshes.exe可以正常加载.x文件if( FAILED( D3DXLoadMeshFromX( "../pawn-texture.x", D3DXMESH_SYSTEMMEM, g_pd3dDevice, &adjBuffer, &pD3DXMtrlBuffer, NULL, &g_dwNumMaterials,                                    &g_pMesh ) ) )        {            MessageBox(NULL, "Could not find pawn-texture.x", "Meshes.exe", MB_OK);            return E_FAIL;}           }    // We need to extract the material properties and texture names from the     // pD3DXMtrlBuffer    D3DXMATERIAL* d3dxMaterials = (D3DXMATERIAL*)pD3DXMtrlBuffer-&gt;GetBufferPointer();    g_pMeshMaterials = new D3DMATERIAL9[g_dwNumMaterials];    if( g_pMeshMaterials == NULL )        return E_OUTOFMEMORY;    g_pMeshTextures  = new LPDIRECT3DTEXTURE9[g_dwNumMaterials];    if( g_pMeshTextures == NULL )        return E_OUTOFMEMORY;    for( DWORD i=0; i&lt;g_dwNumMaterials; i++ )    {        // Copy the material        g_pMeshMaterials[i] = d3dxMaterials[i].MatD3D;        // Set the ambient color for the material (D3DX does not do this)        g_pMeshMaterials[i].Ambient = g_pMeshMaterials[i].Diffuse;        g_pMeshTextures[i] = NULL;        if( d3dxMaterials[i].pTextureFilename != NULL &&             lstrlen(d3dxMaterials[i].pTextureFilename) &gt; 0 )        {            // Create the texture            if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice,                                                 d3dxMaterials[i].pTextureFilename,                                                 &g_pMeshTextures[i] ) ) )            {// If texture is not in current folder, try parent folder//这样做主要是为了运行Debug中的Meshes.exe可以正常加载纹理图片                const TCHAR* strPrefix = TEXT("..\\");                TCHAR strTexture[MAX_PATH];                StringCchCopy( strTexture, MAX_PATH, strPrefix );                StringCchCat( strTexture, MAX_PATH, d3dxMaterials[i].pTextureFilename );                // If texture is not in current folder, try parent folder                if( FAILED( D3DXCreateTextureFromFile( g_pd3dDevice, strTexture, &g_pMeshTextures[i] ) ) )                {                    MessageBox(NULL, "Could not find texture map", "Meshes.exe", MB_OK);}            }        }    }    // Done with the material buffer    pD3DXMtrlBuffer-&gt;Release();    return S_OK;}//-----------------------------------------// Name: Cleanup()// Desc: Releases all previously initialized objects//-----------------------------------------VOID Cleanup(){    if( g_pMeshMaterials != NULL )         delete[] g_pMeshMaterials;    if( g_pMeshTextures )    {        for( DWORD i = 0; i &lt; g_dwNumMaterials; i++ )        {            if( g_pMeshTextures[i] )                g_pMeshTextures[i]-&gt;Release();        }        delete[] g_pMeshTextures;    }    if( g_pMesh != NULL )        g_pMesh-&gt;Release();        if( g_pd3dDevice != NULL )        g_pd3dDevice-&gt;Release();    if( g_pD3D != NULL )        g_pD3D-&gt;Release();}//-----------------------------------------// Name: SetupMatrices()// Desc: Sets up the world, view, and projection transform matrices.//-----------------------------------------VOID SetupMatrices(){    // Set up world matrix    D3DXMATRIXA16 matWorld;    D3DXMatrixRotationX( &matWorld, timeGetTime()/1000.0f );    g_pd3dDevice-&gt;SetTransform( D3DTS_WORLD, &matWorld );    // 相机位置，如果物体过大，可以调整z轴位置，远离0点，让物体大小显示合适    D3DXVECTOR3 vEyePt( 0.0f, 3.0f,-150.0f );    D3DXVECTOR3 vLookatPt( 0.0f, 0.0f, 0.0f );    D3DXVECTOR3 vUpVec( 0.0f, 1.0f, 0.0f );    D3DXMATRIXA16 matView;    D3DXMatrixLookAtLH( &matView, &vEyePt, &vLookatPt, &vUpVec );    g_pd3dDevice-&gt;SetTransform( D3DTS_VIEW, &matView );    // 设置视锥体    D3DXMATRIXA16 matProj;    D3DXMatrixPerspectiveFovLH( &matProj, D3DX_PI/4, 1.0f, 1.0f, 1000.0f );    g_pd3dDevice-&gt;SetTransform( D3DTS_PROJECTION, &matProj );}//-----------------------------------------// Name: SetupLights()// Desc: Sets up the Lights and materials for the scene.//-----------------------------------------VOID SetupLights(){D3DXVECTOR3 direction(1.0f, -1.0f, 1.0f);D3DXCOLOR color(1.0f, 1.0f, 1.0f, 1.0f);    D3DXVECTOR3 vecDir;    D3DLIGHT9 light;    ZeroMemory( &light, sizeof(D3DLIGHT9) );    light.Type       = D3DLIGHT_DIRECTIONAL;//方向光light.Ambient   = color * 0.4f;light.Diffuse   = color;light.Specular  = color * 0.6f;light.Direction = direction;    light.Range       = 1000.0f;    g_pd3dDevice-&gt;SetLight( 0, &light );    g_pd3dDevice-&gt;LightEnable( 0, true );    g_pd3dDevice-&gt;SetRenderState( D3DRS_LIGHTING, TRUE );    // Finally, turn on some ambient light.    g_pd3dDevice-&gt;SetRenderState( D3DRS_AMBIENT, 0x00202020 );}//-----------------------------------------// Name: Render()// Desc: Draws the scene//-----------------------------------------VOID Render(){    // Clear the backbuffer and the zbuffer    g_pd3dDevice-&gt;Clear( 0, NULL, D3DCLEAR_TARGET|D3DCLEAR_ZBUFFER,                          D3DCOLOR_XRGB(0,0,255), 1.0f, 0 );        // Begin the scene    if( SUCCEEDED( g_pd3dDevice-&gt;BeginScene() ) )    {        SetupLights();        // Setup the world, view, and projection matrices        SetupMatrices();        // Meshes are divided into subsets, one for each material. Render them in        // a loop        for( DWORD i=0; i&lt;g_dwNumMaterials; i++ )        {            // Set the material and texture for this subset            g_pd3dDevice-&gt;SetMaterial( &g_pMeshMaterials[i] );            g_pd3dDevice-&gt;SetTexture( 0, g_pMeshTextures[i] );                    // Draw the mesh subset            g_pMesh-&gt;DrawSubset( i );        }        // End the scene        g_pd3dDevice-&gt;EndScene();    }    // Present the backbuffer contents to the display    g_pd3dDevice-&gt;Present( NULL, NULL, NULL, NULL );}//-----------------------------------------// Name: MsgProc()// Desc: The window's message handler//-----------------------------------------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 );}//-----------------------------------------// Name: WinMain()// Desc: The application's entry point//-----------------------------------------INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT ){    // Register the window class    WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,                       GetModuleHandle(NULL), NULL, NULL, NULL, NULL,                      "D3D Tutorial", NULL };    RegisterClassEx( &wc );    // Create the application's window    HWND hWnd = CreateWindow( "D3D Tutorial", "D3D Tutorial 06: Meshes",                               WS_OVERLAPPEDWINDOW, 100, 100, 500, 500,                              GetDesktopWindow(), NULL, wc.hInstance, NULL );    // Initialize Direct3D    if( SUCCEEDED( InitD3D( hWnd ) ) )    {         // Create the scene geometry        if( SUCCEEDED( InitGeometry() ) )        {            // Show the window            ShowWindow( hWnd, SW_SHOWDEFAULT );            UpdateWindow( hWnd );            // Enter the message loop            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;}

文章源地址：http://www.waitingfy.com/?p=277
项目下载：http://download.csdn.net/detail/fox64194167/4651385 （CSDN下载，免积分）
  http://www.waitingfy.com/?attachment_id=281 （本站下载）
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