为什么小弟我渲染出来的是黑色的呢

#include "head.h"
#include "define.h"


#include "DXUTsettingsdlg.h"
#include "SDKmisc.h"
#include "SDKmesh.h"

#pragma warning(disable: 4995)
#define WM_MOUSEWHEEL 0x020A


//***************** Camera *********************************

        CModelViewerCamera MyCamera;

//***************** Camera *********************************
    //Model_info *model;

    CDXUTXFileMesh model;

using namespace std;

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
//***********************************************

    DXUTSetCallbackD3D9DeviceCreated( OnCreateDevice );
    DXUTSetCallbackD3D9FrameRender( OnFrameRender );
    DXUTSetCallbackMsgProc( MsgProc );
    DXUTSetCallbackFrameMove( OnFrameMove );

    DXUTInit( true, true ); // Parse the command line and show msgboxes
    DXUTCreateWindow( L"G" );
    DXUTCreateDevice( true, 1024, 768 );


    DXUTMainLoop();

//*****************    Wait Message *********************
    return DXUTGetExitCode();
}

LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, bool* pbNoFurtherProcessing, void* pUserContext )
{
    MyCamera.HandleMessages( hWnd, uMsg, wParam, lParam );

    return 0;

}

HRESULT CALLBACK OnCreateDevice( IDirect3DDevice9* pd3dDevice, const D3DSURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
    //pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB(255,255,255), 1.0f, 0);

    //model = LoadModel_Texture(L"I:\\I disk\\可移动磁盘 (L)\\3DS文件转换为X文件\\conv3ds\\test.x", L"I:\\I disk\\可移动磁盘 (L)\\3DS文件转换为X文件\\conv3ds\\Serah.jpg", pd3dDevice);

    model.Create(pd3dDevice, L"I:\\I disk\\可移动磁盘 (L)\\3DS文件转换为X文件\\conv3ds\\test.x");


    D3DXVECTOR3 eyePt(0.0f, 0.0f, 50.0f);
    D3DXVECTOR3 lookAt(0.0f, 0.0f, 0.0f);
    MyCamera.SetViewParams(&eyePt, &lookAt);


    float fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT )pBackBufferSurfaceDesc->Height;
    MyCamera.SetProjParams( D3DX_PI / 4, fAspectRatio, 0.1f, 10000.0f );
    MyCamera.SetWindow( pBackBufferSurfaceDesc->Width, pBackBufferSurfaceDesc->Height );

    return S_OK;
}

void CALLBACK OnFrameRender( IDirect3DDevice9* pd3dDevice, double fTime, float fElapsedTime, void* pUserContext )
{
    HRESULT hr;
        V( pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_XRGB( 255,255,255 ), 1.0f, 0 ) );

        if (SUCCEEDED(pd3dDevice->BeginScene()))
        {
            D3DXMATRIX world = *MyCamera.GetWorldMatrix() ;
            V(pd3dDevice->SetTransform(D3DTS_WORLD, &world)) ;

            D3DXMATRIX view  = *MyCamera.GetViewMatrix() ;
            V(pd3dDevice->SetTransform(D3DTS_VIEW, &view)) ;

            D3DXMATRIX proj  = *MyCamera.GetProjMatrix() ;
            V(pd3dDevice->SetTransform(D3DTS_PROJECTION, &proj)) ;

//**********************Rendering****************************

            model.Render(pd3dDevice);

            pd3dDevice->EndScene();
        }

}


void CALLBACK OnFrameMove( double fTime, float fElapsedTime, void* pUserContext )
{
        MyCamera.FrameMove( fElapsedTime );

}