《精通DirectX 3D》第十三章 网格模型高级技术 03_ProgressMesh

《精通DirectX 3D》第十三章 网格模型高级技术 03_ProgressMesh

把"Dwarf.x" 换成"tiny.x"显示不正常，看来不是随便一个.x文件都行，也可能是纹理的原因？必须用dds的？暂时还搞不清楚！

这种实时的计算出顶点的方式太耗资源，用这种方式生成，然后导出，再放在游戏里面使用，才是比较可行的办法。

// =============================================================================
//  Desc: 主程序源文件
// =============================================================================
#include  " dxstdafx.h "
#include  " resource.h "
#pragma warning(disable:  4995 )


// -----------------------------------------------------------------------------
//  全局变量
// -----------------------------------------------------------------------------
ID3DXFont *                  g_pFont  =  NULL;           // ID3DXFont字体对象
ID3DXSprite *                g_pTextSprite  =  NULL;     // ID3DXSprite文本精灵对象
bool                        g_bShowHelp  =   true ;       // 标识是否显示简单说明文本

CDXUTDialogResourceManager g_DialogResourceManager;  // 对话框资源管理器
CD3DSettingsDlg            g_SettingsDlg;            // Direct3D设备设置对话框
CDXUTDialog                g_HUD;                    // 对话框
CDXUTDialog                g_SampleUI;               // 对话框

LPD3DXMESH              g_pMesh           =  NULL;    // 原网格模型
D3DMATERIAL9 *            g_pMeshMaterials  =  NULL;    // 网格模型材质
LPDIRECT3DTEXTURE9 *      g_pMeshTextures   =  NULL;    // 网格模型纹理
DWORD                   g_dwNumMaterials  =   0L ;      // 材质数量
LPD3DXBUFFER            g_pAdjacencyBuffer  =  NULL;  // 网格模型面邻接信息
LPD3DXPMESH             g_pPMesh            =  NULL;  // 层次细节网格模型


// -----------------------------------------------------------------------------
//  控件ID
// -----------------------------------------------------------------------------
#define  IDC_TOGGLEFULLSCREEN      1
#define  IDC_TOGGLEREF             2
#define  IDC_CHANGEDEVICE          3
#define  IDC_DETAIL                4


// -----------------------------------------------------------------------------
//  Desc: 函数声明
// ------------------------------------------------------------------------------
bool     CALLBACK IsDeviceAcceptable( D3DCAPS9 *  pCaps, D3DFORMAT AdapterFormat, D3DFORMAT BackBufferFormat,  bool  bWindowed,  void *  pUserContext );
bool     CALLBACK ModifyDeviceSettings( DXUTDeviceSettings *  pDeviceSettings,  const  D3DCAPS9 *  pCaps,  void *  pUserContext );
HRESULT CALLBACK OnCreateDevice( IDirect3DDevice9 *  pd3dDevice,  const  D3DSURFACE_DESC *  pBackBufferSurfaceDesc,  void *  pUserContext );
HRESULT CALLBACK OnResetDevice( IDirect3DDevice9 *  pd3dDevice,  const  D3DSURFACE_DESC *  pBackBufferSurfaceDesc,  void *  pUserContext );
void     CALLBACK OnFrameMove( IDirect3DDevice9 *  pd3dDevice,  double  fTime,  float  fElapsedTime,  void *  pUserContext );
void     CALLBACK OnFrameRender( IDirect3DDevice9 *  pd3dDevice,  double  fTime,  float  fElapsedTime,  void *  pUserContext );
LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam,  bool *  pbNoFurtherProcessing,  void *  pUserContext );
void     CALLBACK KeyboardProc( UINT nChar,  bool  bKeyDown,  bool  bAltDown,  void *  pUserContext );
void     CALLBACK OnGUIEvent( UINT nEvent,  int  nControlID, CDXUTControl *  pControl,  void *  pUserContext );
void     CALLBACK OnLostDevice(  void *  pUserContext );
void     CALLBACK OnDestroyDevice(  void *  pUserContext );

void     InitApp();
void     RenderText();


// -----------------------------------------------------------------------------
//  Desc: 入口函数
// -----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE, HINSTANCE, LPSTR,  int  )
{
     // 为Debug配置启用运行时内存检查功能
#if  defined(DEBUG) | defined(_DEBUG)
    _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF  |  _CRTDBG_LEAK_CHECK_DF );
#endif

     // 设置回调函数
    DXUTSetCallbackDeviceCreated( OnCreateDevice );
    DXUTSetCallbackDeviceReset( OnResetDevice );
    DXUTSetCallbackDeviceLost( OnLostDevice );
    DXUTSetCallbackDeviceDestroyed( OnDestroyDevice );
    DXUTSetCallbackMsgProc( MsgProc );
    DXUTSetCallbackKeyboard( KeyboardProc );
    DXUTSetCallbackFrameRender( OnFrameRender );
    DXUTSetCallbackFrameMove( OnFrameMove );

     // 应用程序相关的初始化
    InitApp();

     // 初始化DXUT, 创建窗口, 创建Direct3D设备对象
    DXUTInit(  true ,  true ,  true  );
    DXUTSetCursorSettings(  true ,  true  );
    DXUTCreateWindow( L " ProgressMesh "  );
    DXUTCreateDevice( D3DADAPTER_DEFAULT,  true ,  640 ,  480 , 
        IsDeviceAcceptable, ModifyDeviceSettings );

     // 进入消息循环和场景渲染
    DXUTMainLoop();

     // 在此进行应用程序相关的清除工作

     return  DXUTGetExitCode();
}


// -----------------------------------------------------------------------------
//  Desc: 应用程序相关初始化
// -----------------------------------------------------------------------------
void  InitApp()
{
     // 初始化对话框
    g_SettingsDlg.Init(  & g_DialogResourceManager );
    g_HUD.Init(  & g_DialogResourceManager );
    g_SampleUI.Init(  & g_DialogResourceManager );

     // 为g_HUD对话框设置消息处理函数,添加控件
    g_HUD.SetCallback( OnGUIEvent ); 
     int  iY  =   10 ; 
    g_HUD.AddButton( IDC_TOGGLEFULLSCREEN, L " Toggle full screen " ,  35 , iY,  125 ,  22  );
    g_HUD.AddButton( IDC_TOGGLEREF, L " Toggle REF (F3) " ,  35 , iY  +=   24 ,  125 ,  22  );
    g_HUD.AddButton( IDC_CHANGEDEVICE, L " Change device (F2) " ,  35 , iY  +=   24 ,  125 ,  22 , VK_F2 );

     // 添加滑竿控件
    g_SampleUI.SetCallback( OnGUIEvent ); 
    g_SampleUI.AddSlider( IDC_DETAIL,  10 ,  36 ,  200 ,  16 ,  4 ,  4 ,  4  );
}


// -----------------------------------------------------------------------------
//  Desc: 设备能力检查
// -----------------------------------------------------------------------------
bool  CALLBACK IsDeviceAcceptable( D3DCAPS9 *  pCaps, D3DFORMAT AdapterFormat, 
                                  D3DFORMAT BackBufferFormat,  bool  bWindowed, 
                                   void *  pUserContext )
{
     // 检查后台缓冲区格式是否支持Alpha混合等操作(post pixel blending operations)
    IDirect3D9 *  pD3D  =  DXUTGetD3DObject(); 
     if ( FAILED( pD3D -> CheckDeviceFormat( pCaps -> AdapterOrdinal, pCaps -> DeviceType,
                    AdapterFormat, D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING, 
                    D3DRTYPE_TEXTURE, BackBufferFormat ) ) )
         return   false ;

     return   true ;
}


// -----------------------------------------------------------------------------
//  Desc: 修改Direct3D渲染设备设置
// -----------------------------------------------------------------------------
bool  CALLBACK ModifyDeviceSettings( DXUTDeviceSettings *  pDeviceSettings, 
                                     const  D3DCAPS9 *  pCaps,  void *  pUserContext )
{
     // 如果不支持硬件顶点处理则使用软件顶点处理
     if ( (pCaps -> DevCaps  &  D3DDEVCAPS_HWTRANSFORMANDLIGHT)  ==   0 )
    {
        pDeviceSettings -> BehaviorFlags  =  D3DCREATE_SOFTWARE_VERTEXPROCESSING;
    }

     // 如果使用参考设备,则弹出警告对话框
     static   bool  s_bFirstTime  =   true ;
     if ( s_bFirstTime )
    {
        s_bFirstTime  =   false ;
         if ( pDeviceSettings -> DeviceType  ==  D3DDEVTYPE_REF )
            DXUTDisplaySwitchingToREFWarning();
    }

     return   true ;
}


// -----------------------------------------------------------------------------
//  Desc: 辅助函数, 从绝对路径中提取纹理文件名
// -----------------------------------------------------------------------------
void  RemovePathFromFileName(LPSTR fullPath, LPWSTR fileName)
{
     // 先将fullPath的类型变换为LPWSTR
    WCHAR wszBuf[MAX_PATH];
    MultiByteToWideChar( CP_ACP,  0 , fullPath,  - 1 , wszBuf, MAX_PATH );
    wszBuf[MAX_PATH - 1 ]  =  L ' \0 ' ;

    WCHAR *  wszFullPath  =  wszBuf;

     // 从绝对路径中提取文件名
    LPWSTR pch = wcsrchr(wszFullPath, ' \\ ' );
     if  (pch)
        lstrcpy(fileName,  ++ pch);
     else
        lstrcpy(fileName, wszFullPath);
}


// -----------------------------------------------------------------------------
//  Desc: 在此创建管理内存资源对象
// -----------------------------------------------------------------------------
HRESULT CALLBACK OnCreateDevice( IDirect3DDevice9 *  pd3dDevice, 
                                 const  D3DSURFACE_DESC *  pBackBufferSurfaceDesc, 
                                 void *  pUserContext )
{
    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnCreateDevice( pd3dDevice ) );
    V_RETURN( g_SettingsDlg.OnCreateDevice( pd3dDevice ) );
    
     // 创建字体
    V_RETURN( D3DXCreateFont( pd3dDevice,  15 ,  0 , FW_BOLD,  1 , FALSE, DEFAULT_CHARSET, 
                         OUT_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH  |  FF_DONTCARE, 
                         L " Arial " ,  & g_pFont ) );

     // 加载网格模型
    LPD3DXBUFFER pD3DXMtrlBuffer;

    V_RETURN( D3DXLoadMeshFromX( L " Dwarf.x " , D3DXMESH_MANAGED, 
                                   pd3dDevice,  & g_pAdjacencyBuffer, 
                                    & pD3DXMtrlBuffer, NULL,  & g_dwNumMaterials, 
                                    & g_pMesh ) );

     // 提取材质和纹理文件路径
    D3DXMATERIAL *  d3dxMaterials  =  (D3DXMATERIAL * )pD3DXMtrlBuffer -> GetBufferPointer();
    g_pMeshMaterials  =   new  D3DMATERIAL9[g_dwNumMaterials];
    g_pMeshTextures   =   new  LPDIRECT3DTEXTURE9[g_dwNumMaterials];

     for ( DWORD i = 0 ; i < g_dwNumMaterials; i ++  )
    {
        g_pMeshMaterials[i]  =  d3dxMaterials[i].MatD3D;
        g_pMeshMaterials[i].Ambient  =  g_pMeshMaterials[i].Diffuse;

         // 创建纹理
        WCHAR fullname[ 256 ];
        RemovePathFromFileName(d3dxMaterials[i].pTextureFilename,fullname);
        g_pMeshTextures[i]  =  NULL;
         if ( d3dxMaterials[i].pTextureFilename  !=  NULL   &&  lstrlen(fullname) > 0  )
        {
           V_RETURN( D3DXCreateTextureFromFile( pd3dDevice, fullname,  & g_pMeshTextures[i] ) );
        }
    }

    pD3DXMtrlBuffer -> Release();

    LPD3DXMESH pTempMesh;   // 临时网格模型变量

     // 整理原始网格模型
    V_RETURN( D3DXCleanMesh( D3DXCLEAN_SIMPLIFICATION, g_pMesh, 
                                   (DWORD * )g_pAdjacencyBuffer -> GetBufferPointer(),  & pTempMesh, 
                                   (DWORD * )g_pAdjacencyBuffer -> GetBufferPointer(), NULL ) );
    SAFE_RELEASE( g_pMesh );
    g_pMesh  =  pTempMesh;

     // 熔合重复的顶点
    D3DXWELDEPSILONS Epsilons;
    ZeroMemory(  & Epsilons,  sizeof (D3DXWELDEPSILONS) );
    V_RETURN( D3DXWeldVertices( g_pMesh, D3DXWELDEPSILONS_WELDPARTIALMATCHES,
                                      & Epsilons, 
                                     (DWORD * )g_pAdjacencyBuffer -> GetBufferPointer(),  
                                     (DWORD * )g_pAdjacencyBuffer -> GetBufferPointer(),
                                     NULL, NULL ) );

     // 检查处理、简化后的网格模型是否有效
    V_RETURN(D3DXValidMesh( g_pMesh, (DWORD * )g_pAdjacencyBuffer -> GetBufferPointer(), NULL ) );

     // 生成层次细节网格模型
    V_RETURN(D3DXGeneratePMesh( g_pMesh, (DWORD * )g_pAdjacencyBuffer -> GetBufferPointer(),
                                NULL, NULL,  1 , D3DXMESHSIMP_VERTEX,  & g_pPMesh ) );

    DWORD cVerticesMin  =  g_pPMesh -> GetMinVertices();
    DWORD cVerticesMax  =  g_pPMesh -> GetMaxVertices();

    g_SampleUI.GetSlider( IDC_DETAIL ) -> SetRange( cVerticesMin, cVerticesMax );
    g_SampleUI.GetSlider( IDC_DETAIL ) -> SetValue( cVerticesMax );
    V_RETURN(g_pPMesh -> SetNumVertices(cVerticesMax));

     return  hr;
}


// -----------------------------------------------------------------------------
//  Desc: 在此创建默认内存类型资源对象
// -----------------------------------------------------------------------------
HRESULT CALLBACK OnResetDevice( IDirect3DDevice9 *  pd3dDevice, 
                                 const  D3DSURFACE_DESC *  pBackBufferSurfaceDesc, 
                                 void *  pUserContext )
{
    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnResetDevice() );
    V_RETURN( g_SettingsDlg.OnResetDevice() );

     // 设置对话框位置和尺寸
    g_HUD.SetLocation( pBackBufferSurfaceDesc -> Width - 170 ,  0  );
    g_HUD.SetSize(  170 ,  170  );
  
    g_SampleUI.SetLocation(  0 , pBackBufferSurfaceDesc -> Height - 60  );
    g_SampleUI.SetSize( pBackBufferSurfaceDesc -> Width,  50  );
    g_SampleUI.GetControl( IDC_DETAIL ) -> SetSize( pBackBufferSurfaceDesc -> Width - 20 ,  16  );

     // 恢复字体
     if ( g_pFont )
        V_RETURN( g_pFont -> OnResetDevice() );
   
     // 创建ID3DXSprite接口对象
    V_RETURN( D3DXCreateSprite( pd3dDevice,  & g_pTextSprite ) );

     // 设置世界矩阵
    D3DXMATRIXA16 matWorld;
    D3DXMatrixTranslation(  & matWorld,  0 ,  - 0.7f ,  0 );
    pd3dDevice -> SetTransform( D3DTS_WORLD,  & matWorld );

     // 设置观察矩阵
    D3DXMATRIXA16 matView;
    D3DXVECTOR3 vEyePt(  0.0f ,  0.0f , - 4  );
    D3DXVECTOR3 vLookatPt(  0.0f ,  0.0f ,  0.0f  );
    D3DXVECTOR3 vUpVec(  0.0f ,  1.0f ,  0.0f  );
    D3DXMatrixLookAtLH(  & matView,  & vEyePt,  & vLookatPt,  & vUpVec );
    pd3dDevice -> SetTransform( D3DTS_VIEW,  & matView );

     // 设置投影矩阵
    D3DXMATRIXA16 matProj;
     float  fAspectRatio  =  ( float )pBackBufferSurfaceDesc -> Width  /  pBackBufferSurfaceDesc -> Height;
    D3DXMatrixPerspectiveFovLH(  & matProj, D3DX_PI / 4 , fAspectRatio,  1.0f ,  100.0f  );
    pd3dDevice -> SetTransform( D3DTS_PROJECTION,  & matProj );

     // 设置环境光
    pd3dDevice -> SetRenderState( D3DRS_AMBIENT,  0xffffffff  );

     return  S_OK;
}


// -----------------------------------------------------------------------------
//  Desc: 更新场景
// -----------------------------------------------------------------------------
void  CALLBACK OnFrameMove( IDirect3DDevice9 *  pd3dDevice,  double  fTime, 
                            float  fElapsedTime,  void *  pUserContext )
{
}


// -----------------------------------------------------------------------------
//  Desc: 渲染场景
// -----------------------------------------------------------------------------
void  CALLBACK OnFrameRender( IDirect3DDevice9 *  pd3dDevice,  double  fTime, 
                             float  fElapsedTime,  void *  pUserContext )
{
    HRESULT hr;
  
     // 如果正在利用Direct3D设备设置对话框进行设置, 则不渲染场景
     if ( g_SettingsDlg.IsActive() )
    {
        g_SettingsDlg.OnRender( fElapsedTime );
         return ;
    }

     // 清除后台颜色缓冲区和深度缓冲区
    V( pd3dDevice -> Clear( 0 , NULL, D3DCLEAR_TARGET  |  D3DCLEAR_ZBUFFER, 
                         D3DCOLOR_ARGB( 0 ,  45 ,  50 ,  170 ),  1.0f ,  0 ) );

     // 渲染场景
     if ( SUCCEEDED( pd3dDevice -> BeginScene() ) )
    {
         for (DWORD i = 0 ; i < g_dwNumMaterials; i ++ )
        {
            pd3dDevice -> SetMaterial(  & g_pMeshMaterials[i] );
            pd3dDevice -> SetTexture(  0 , g_pMeshTextures[i]);
            g_pPMesh -> DrawSubset( i );
        }

         // 渲染文本和控件
        DXUT_BeginPerfEvent( DXUT_PERFEVENTCOLOR, L " HUD / Stats "  ); 
        RenderText();
        V( g_HUD.OnRender( fElapsedTime ) );
        V( g_SampleUI.OnRender( fElapsedTime ) );
        DXUT_EndPerfEvent();

        V( pd3dDevice -> EndScene() );
    }
}


// -----------------------------------------------------------------------------
//  Desc: 渲染文本
// -----------------------------------------------------------------------------
void  RenderText()
{
    CDXUTTextHelper txtHelper( g_pFont, g_pTextSprite,  15  );

     // 显示当前Direct3D设备状态和渲染帧速率
    txtHelper.Begin();
    txtHelper.SetInsertionPos(  5 ,  5  );
    txtHelper.SetForegroundColor( D3DXCOLOR(  1.0f ,  1.0f ,  0.0f ,  1.0f  ) );
    txtHelper.DrawTextLine( DXUTGetFrameStats( true ) );
    txtHelper.DrawTextLine( DXUTGetDeviceStats() );

     // 显示其他简要信息
    txtHelper.SetForegroundColor( D3DXCOLOR(  1.0f ,  1.0f ,  1.0f ,  1.0f  ) );
    txtHelper.DrawTextLine( L " 层次细节网格模型 "  );
    txtHelper.DrawFormattedTextLine( L " 顶点数量范围: %u 到 %u\n "
                                     L " 当前顶点数量: %d\n " ,
                                     g_pPMesh -> GetMinVertices(),
                                     g_pPMesh -> GetMaxVertices(),
                                     g_pPMesh -> GetNumVertices() );
    
     // 显示简单帮助文本
     const  D3DSURFACE_DESC *  pd3dsdBackBuffer  =  DXUTGetBackBufferSurfaceDesc();
     if ( g_bShowHelp )
    {
        txtHelper.SetInsertionPos(  10 , pd3dsdBackBuffer -> Height - 15 * 6  );
        txtHelper.SetForegroundColor( D3DXCOLOR(  1.0f ,  0.75f ,  0.0f ,  1.0f  ) );
        txtHelper.DrawTextLine( L " Controls (F1 to hide): "  );

        txtHelper.SetInsertionPos(  40 , pd3dsdBackBuffer -> Height - 15 * 5  );
        txtHelper.DrawTextLine( L " Quit: ESC "  );
    }
     else
    {
        txtHelper.SetInsertionPos(  10 , pd3dsdBackBuffer -> Height - 15 * 2  );
        txtHelper.SetForegroundColor( D3DXCOLOR(  1.0f ,  1.0f ,  1.0f ,  1.0f  ) );
        txtHelper.DrawTextLine( L " Press F1 for help "  );
    }
    txtHelper.End();
}


// -----------------------------------------------------------------------------
//  Desc: 消息处理
// -----------------------------------------------------------------------------
LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, 
                          bool *  pbNoFurtherProcessing,  void *  pUserContext )
{
     * pbNoFurtherProcessing  =  g_DialogResourceManager.MsgProc( hWnd, uMsg, wParam, lParam );
     if (  * pbNoFurtherProcessing )
         return   0 ;

     if ( g_SettingsDlg.IsActive() )
    {
        g_SettingsDlg.MsgProc( hWnd, uMsg, wParam, lParam );
         return   0 ;
    }

     * pbNoFurtherProcessing  =  g_HUD.MsgProc( hWnd, uMsg, wParam, lParam );
     if (  * pbNoFurtherProcessing )
         return   0 ;
   
     * pbNoFurtherProcessing  =  g_SampleUI.MsgProc( hWnd, uMsg, wParam, lParam );
     if (  * pbNoFurtherProcessing )
         return   0 ;

     return   0 ;
}


// -----------------------------------------------------------------------------
//  Desc: 键盘消息处理
// -----------------------------------------------------------------------------
void  CALLBACK KeyboardProc( UINT nChar,  bool  bKeyDown,  bool  bAltDown,  void *  pUserContext )
{
     if ( bKeyDown )
    {
         switch ( nChar )
        {
             case  VK_F1: g_bShowHelp  =   ! g_bShowHelp;  break ;
        }
    }
}


// -----------------------------------------------------------------------------
//  Desc: 处理各种控件消息
// -----------------------------------------------------------------------------
void  CALLBACK OnGUIEvent( UINT nEvent,  int  nControlID, CDXUTControl *  pControl, 
                          void *  pUserContext )
{
     switch ( nControlID )
    {
         case  IDC_TOGGLEFULLSCREEN:
            DXUTToggleFullScreen(); 
             break ;

         case  IDC_TOGGLEREF:
            DXUTToggleREF(); 
             break ;

         case  IDC_CHANGEDEVICE:
            g_SettingsDlg.SetActive(  ! g_SettingsDlg.IsActive() ); 
             break ;

         case  IDC_DETAIL:
            g_pPMesh -> SetNumVertices( ((CDXUTSlider * )pControl) -> GetValue() );
             break ;
    }
}


// -----------------------------------------------------------------------------
//  Desc: 释放在OnResetDevice()中创建的资源
// -----------------------------------------------------------------------------
void  CALLBACK OnLostDevice(  void *  pUserContext )
{
    g_DialogResourceManager.OnLostDevice();
    g_SettingsDlg.OnLostDevice();
     if ( g_pFont )
        g_pFont -> OnLostDevice();
    SAFE_RELEASE( g_pTextSprite );
}


// ------------------------------------------------------------------------------
//  Desc: 释放在OnCreateDevice()中创建的资源
// ------------------------------------------------------------------------------
void  CALLBACK OnDestroyDevice(  void *  pUserContext )
{
    g_DialogResourceManager.OnDestroyDevice();
    g_SettingsDlg.OnDestroyDevice();
    SAFE_RELEASE( g_pFont );

     if ( g_pMeshMaterials  !=  NULL ) 
        delete[] g_pMeshMaterials;

     if ( g_pMeshTextures )
    {
         for ( DWORD i  =   0 ; i  <  g_dwNumMaterials; i ++  )
        {
             if ( g_pMeshTextures[i] )
                g_pMeshTextures[i] -> Release();
        }
        delete[] g_pMeshTextures;
    }

    SAFE_RELEASE(g_pAdjacencyBuffer);
    SAFE_RELEASE(g_pMesh);
    SAFE_RELEASE(g_pPMesh);
}