C++ CFirstPersonCamera::SetProjParams方法代码示例

//--------------------------------------------------------------------------------------
// Calcaulte the camera based on size of the current scene
//--------------------------------------------------------------------------------------
void UpdateViewerCameraNearFar()
{
    XMVECTOR vMeshExtents = g_CascadedShadow.GetSceneAABBMax() - g_CascadedShadow.GetSceneAABBMin();
    XMVECTOR vMeshLength = XMVector3Length(vMeshExtents);
    FLOAT fMeshLength = XMVectorGetByIndex(vMeshLength, 0);
    g_ViewerCamera.SetProjParams(XM_PI / 4, g_fAspectRatio, 0.05f, fMeshLength);
}

//--------------------------------------------------------------------------------------
// Create any D3D11 resources that depend on the back buffer
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11ResizedSwapChain( ID3D11Device* pd3dDevice, IDXGISwapChain* pSwapChain,
                                          const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
  UNREFERENCED_PARAMETER(pSwapChain);
  UNREFERENCED_PARAMETER(pUserContext);

  HRESULT hr;
  XMVECTOR vMeshExtents = g_Scene.GetSceneAABBMax() - g_Scene.GetSceneAABBMin();
  XMVECTOR vMeshLength = XMVector3Length( vMeshExtents );
  FLOAT    fMeshLength = XMVectorGetByIndex( vMeshLength, 0);
  
  V_RETURN( g_DialogResourceManager.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );
  V_RETURN( g_D3DSettingsDlg.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );
  
  g_fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT ) pBackBufferSurfaceDesc->Height;
  
  g_ViewerCamera.SetProjParams( XM_PI / 4, g_fAspectRatio, 0.05f, fMeshLength);
  
  g_Scene.OnResize(pBackBufferSurfaceDesc->Width, pBackBufferSurfaceDesc->Height);
     
  g_HUD.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 );
  g_HUD.SetSize( 170, 170 );
  g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, pBackBufferSurfaceDesc->Height - 300 );
  g_SampleUI.SetSize( 170, 300 );
  
  return S_OK;
}

//--------------------------------------------------------------------------------------
// Create any D3D11 resources that depend on the back buffer
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11ResizedSwapChain( ID3D11Device* pd3dDevice, IDXGISwapChain* pSwapChain,
                                          const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );
    V_RETURN( g_D3DSettingsDlg.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );

    // Setup the camera's projection parameters
    float fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT )pBackBufferSurfaceDesc->Height;
    g_Camera.SetProjParams( D3DX_PI / 4, fAspectRatio, 2.0f, 4000.0f );
	//    g_Camera.SetWindow( pBackBufferSurfaceDesc->Width, pBackBufferSurfaceDesc->Height );
	//    g_Camera.SetButtonMasks( MOUSE_MIDDLE_BUTTON, MOUSE_WHEEL, MOUSE_LEFT_BUTTON );


	D3DXVECTOR3 vMin = D3DXVECTOR3( -1000.0f, -1000.0f, -1000.0f );
    D3DXVECTOR3 vMax = D3DXVECTOR3( 1000.0f, 1000.0f, 1000.0f );
    g_Camera.SetRotateButtons(TRUE, FALSE, FALSE);
	
	
    g_Camera.SetScalers( 0.01f, 30.0f );
    g_Camera.SetDrag( true );
    g_Camera.SetEnableYAxisMovement( true );
    g_Camera.SetClipToBoundary( TRUE, &vMin, &vMax );
    g_Camera.FrameMove( 0 );


    g_HUD.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 );
    g_HUD.SetSize( 170, 170 );
    g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, pBackBufferSurfaceDesc->Height - 300 );
    g_SampleUI.SetSize( 170, 300 );

	//Turn off backface culling
	D3D11_RASTERIZER_DESC rsDesc;
	ZeroMemory(&rsDesc,sizeof(D3D11_RASTERIZER_DESC) );
	rsDesc.CullMode = D3D11_CULL_NONE;
	rsDesc.FillMode = D3D11_FILL_SOLID;
	//rsDesc.FillMode = D3D11_FILL_WIREFRAME;
	
	
	ID3D11RasterizerState *pRasterizerState = NULL;
	pd3dDevice->CreateRasterizerState(&rsDesc, &pRasterizerState);
	
	DXUTGetD3D11DeviceContext()->RSSetState(pRasterizerState);

	SAFE_RELEASE(pRasterizerState);

    return S_OK;
}

//--------------------------------------------------------------------------------------
// Callback function for changed window size
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11ResizedSwapChain( ID3D11Device* pd3dDevice, IDXGISwapChain* pSwapChain,
                                         const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );
    V_RETURN( g_D3DSettingsDlg.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );

    // Setup the camera's projection parameters    
    float fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT )pBackBufferSurfaceDesc->Height;
    g_Camera.SetProjParams( D3DX_PI / 4, fAspectRatio, 0.5f, 100.0f );
    g_LCamera.SetProjParams( D3DX_PI / 4, fAspectRatio, 10.0f, 100.0f );

    g_HUD.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 );
    g_HUD.SetSize( 170, 170 );
    g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, pBackBufferSurfaceDesc->Height - 240 );
    g_SampleUI.SetSize( 150, 110 );

    return S_OK;
}

//--------------------------------------------------------------------------------------
// When the user changes scene, recreate these components as they are scene 
// dependent.
//--------------------------------------------------------------------------------------
HRESULT CreateD3DComponents( ID3D11Device* pd3dDevice)
{
  HRESULT hr;
  
  auto pd3dImmediateContext = DXUTGetD3D11DeviceContext();
  V_RETURN( g_DialogResourceManager.OnD3D11CreateDevice( pd3dDevice, pd3dImmediateContext ) );
  V_RETURN( g_D3DSettingsDlg.OnD3D11CreateDevice( pd3dDevice ) );
  g_pTxtHelper  = new CDXUTTextHelper( pd3dDevice, pd3dImmediateContext, &g_DialogResourceManager, 15 );
  
  static const XMVECTORF32 s_vecEye    = { 105.0f,  14.0f, -3.0f, 0.f };
  static const XMVECTORF32 s_vecLookAt = {   0.0f,  -7.5f,  0.0f, 0.f };
  XMFLOAT3                 vMin        = XMFLOAT3( -1000.0f, -1000.0f, -1000.0f );
  XMFLOAT3                 vMax        = XMFLOAT3( 1000.0f, 1000.0f, 1000.0f );
  
  g_ViewerCamera.SetViewParams( s_vecEye, s_vecLookAt );
  g_ViewerCamera.SetRotateButtons( true, false, false);
  g_ViewerCamera.SetScalers( 0.01f, 10.0f );
  g_ViewerCamera.SetDrag( true );
  g_ViewerCamera.SetEnableYAxisMovement( true );
  g_ViewerCamera.SetClipToBoundary( true, &vMin, &vMax );
  g_ViewerCamera.FrameMove( 0 );
  
  static const XMVECTORF32 s_lightEye = { -320.0f, 300.0f, -220.3f, 0.f };
  g_LightCamera.SetViewParams( s_lightEye, g_XMZero );
  g_LightCamera.SetRotateButtons( true, false, false );
  g_LightCamera.SetScalers( 0.01f, 50.0f );
  g_LightCamera.SetDrag( true );
  g_LightCamera.SetEnableYAxisMovement( true );
  g_LightCamera.SetClipToBoundary( true, &vMin, &vMax );
  g_LightCamera.SetProjParams( XM_PI / 4, 1.0f, 0.1f , 1000.0f);

  g_LightCamera.FrameMove( 0 );
         
  // Get the final sizes
  uint32_t width  = DXUTGetDXGIBackBufferSurfaceDesc()->Width; 
  uint32_t height = DXUTGetDXGIBackBufferSurfaceDesc()->Height;

  g_Scene.Init( pd3dDevice, pd3dImmediateContext, &g_MeshPowerPlant, width, height);
  
  return S_OK;
}

//--------------------------------------------------------------------------------------
// Create any D3D11 resources that depend on the back buffer
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11ResizedSwapChain( ID3D11Device* pd3dDevice, IDXGISwapChain* pSwapChain,
                                          const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );
    V_RETURN( g_D3DSettingsDlg.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );

    // Setup the camera's projection parameters
    float fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT )pBackBufferSurfaceDesc->Height;
    g_Camera.SetProjParams( XM_PI / 4, fAspectRatio, 0.1f, 2000.0f );
    //g_Camera.SetWindow( pBackBufferSurfaceDesc->Width, pBackBufferSurfaceDesc->Height );
    //g_Camera.SetButtonMasks( MOUSE_MIDDLE_BUTTON, MOUSE_WHEEL, MOUSE_LEFT_BUTTON );

    g_HUD.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 );
    g_HUD.SetSize( 170, 170 );
    g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, pBackBufferSurfaceDesc->Height - 300 );
    g_SampleUI.SetSize( 170, 300 );

    return S_OK;
}

//--------------------------------------------------------------------------------------
// When the user changes scene, recreate these components as they are scene 
// dependent.
//--------------------------------------------------------------------------------------
HRESULT CreateD3DComponents(ID3D11Device* pd3dDevice)
{
    HRESULT hr;

    ID3D11DeviceContext* pd3dImmediateContext = DXUTGetD3D11DeviceContext();
    V_RETURN(g_DialogResourceManager.OnD3D11CreateDevice(pd3dDevice, pd3dImmediateContext));
    V_RETURN(g_D3DSettingsDlg.OnD3D11CreateDevice(pd3dDevice));
    g_pTxtHelper = new CDXUTTextHelper(pd3dDevice, pd3dImmediateContext, &g_DialogResourceManager, 15);


    XMVECTOR vecEye = XMVectorSet(100.0f, 5.0f, 5.0f, 0);
    XMVECTOR vecAt = XMVectorSet(0.0f, 0.0f, 0.0f, 0);
    XMFLOAT3 vMin = XMFLOAT3(-1000.0f, -1000.0f, -1000.0f);
    XMFLOAT3 vMax = XMFLOAT3(1000.0f, 1000.0f, 1000.0f);

    g_ViewerCamera.SetViewParams(vecEye, vecAt);
    g_ViewerCamera.SetRotateButtons(TRUE, FALSE, FALSE);
    g_ViewerCamera.SetScalers(0.01f, 10.0f);
    g_ViewerCamera.SetDrag(true);
    g_ViewerCamera.SetEnableYAxisMovement(true);
    g_ViewerCamera.SetClipToBoundary(TRUE, &vMin, &vMax);
    g_ViewerCamera.FrameMove(0);

    vecEye = XMVectorSet(-320.0f, 300.0f, -220.3f, 0);
    vecAt = XMVectorSet(0.0f, 0.0f, 0.0f, 0);

    g_LightCamera.SetViewParams(vecEye, vecAt);
    g_LightCamera.SetRotateButtons(TRUE, FALSE, FALSE);
    g_LightCamera.SetScalers(0.01f, 50.0f);
    g_LightCamera.SetDrag(true);
    g_LightCamera.SetEnableYAxisMovement(true);
    g_LightCamera.SetClipToBoundary(TRUE, &vMin, &vMax);
    g_LightCamera.SetProjParams(XM_PI / 4, 1.0f, 0.1f, 1000.0f);
    g_LightCamera.FrameMove(0);

    g_CascadedShadow.Init(pd3dDevice, pd3dImmediateContext,
        g_pSelectedMesh, &g_ViewerCamera, &g_LightCamera, &g_CascadeConfig);

    return S_OK;
}

//--------------------------------------------------------------------------------------
// SwapChain has changed and may have new attributes such as size.
// Create any D3D11 resources that depend on the back buffer
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11ResizedSwapChain(ID3D11Device* pd3dDevice, IDXGISwapChain *pSwapChain, const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext)
{
    HRESULT hr;

    DXUTTRACE(L"OnD3D11ResizedSwapChain called\n");

    V_RETURN( g_DialogResourceManager.OnD3D11ResizedSwapChain(pd3dDevice, pBackBufferSurfaceDesc) );
    V_RETURN( g_SettingsDlg.OnD3D11ResizedSwapChain(pd3dDevice, pBackBufferSurfaceDesc) );

    g_BackBufferWidth   = pBackBufferSurfaceDesc->Width;
    g_BackBufferHeight  = pBackBufferSurfaceDesc->Height;

    g_FullViewport.TopLeftX = 0.f;
    g_FullViewport.TopLeftY = 0.f;
    g_FullViewport.MinDepth = 0.f;
    g_FullViewport.MaxDepth = 1.f;
    g_FullViewport.Width    = (FLOAT)g_BackBufferWidth;
    g_FullViewport.Height   = (FLOAT)g_BackBufferHeight;

    // Setup the camera's projection parameters
    float AspectRatio  = (float)g_BackBufferWidth / (float)g_BackBufferHeight;
    g_OrbitalCamera.SetProjParams (FOVY, AspectRatio, ZNEAR, ZFAR);
    g_OrbitalCamera.SetWindow     (g_BackBufferWidth, g_BackBufferHeight);
    g_OrbitalCamera.SetButtonMasks(MOUSE_LEFT_BUTTON, MOUSE_WHEEL, 0);

    g_FirstPersonCamera.SetProjParams (FOVY, AspectRatio, ZNEAR, ZFAR);
    g_FirstPersonCamera.SetRotateButtons( 1, 1, 1 );

    UINT HudWidth = 256;
    float HudOpacity = 0.32f;
    g_HUD.SetLocation(g_BackBufferWidth - HudWidth, 0);
    g_HUD.SetSize    (HudWidth, g_BackBufferHeight);
    g_HUD.SetBackgroundColors(D3DCOLOR_COLORVALUE(0,0,0,HudOpacity));

    // Allocate our own screen-sized buffers, as the SwapChain only contains a non-MSAA color buffer.
    ResizeScreenSizedBuffers(pd3dDevice);

    return hr;
}

//--------------------------------------------------------------------------------------
// Create any D3D11 resources that depend on the back buffer
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D11ResizedSwapChain( ID3D11Device* pd3dDevice, IDXGISwapChain* pSwapChain,
                                          const DXGI_SURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );
    V_RETURN( g_D3DSettingsDlg.OnD3D11ResizedSwapChain( pd3dDevice, pBackBufferSurfaceDesc ) );

    // Setup the camera's projection parameters
	width =  pBackBufferSurfaceDesc->Width;
	height = pBackBufferSurfaceDesc->Height;
    float fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT )pBackBufferSurfaceDesc->Height;
    g_Camera.SetProjParams( D3DX_PI / 4, fAspectRatio, 2.0f, 100000.0f );
    //g_Camera.SetWindow( pBackBufferSurfaceDesc->Width, pBackBufferSurfaceDesc->Height );
   //g_Camera.SetButtonMasks( MOUSE_MIDDLE_BUTTON, MOUSE_WHEEL, MOUSE_LEFT_BUTTON );
    g_HUD.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 );
    g_HUD.SetSize( 170, 170 );
    g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, pBackBufferSurfaceDesc->Height - 300 );
    g_SampleUI.SetSize( 170, 300 );
	//deboard.OnD3D11ResizedSwapChain(pd3dDevice,pSwapChain,pBackBufferSurfaceDesc,pUserContext);

		DXGI_FORMAT format;
	D3D11_TEXTURE2D_DESC info ;
	ZeroMemory (& info , sizeof ( info ));
	info.Width = pBackBufferSurfaceDesc->Width;
	info.Height = pBackBufferSurfaceDesc->Height;
	info.MipLevels = 1;
	info.ArraySize = 1;
	info.Format = DXGI_FORMAT_R32G32B32A32_FLOAT;
	info.SampleDesc . Count = 1;
	info.Usage = D3D11_USAGE_DEFAULT;
	info.BindFlags = D3D11_BIND_RENDER_TARGET|D3D11_BIND_SHADER_RESOURCE ;
	info.CPUAccessFlags = 0;
	info.MiscFlags = 0;
	hr = pd3dDevice->CreateTexture2D(&info,nullptr,&original_texture);
	hr = pd3dDevice->CreateTexture2D(&info,nullptr,&texture1);
	hr = pd3dDevice->CreateTexture2D(&info,nullptr,&texture2);
	format = info.Format;

 	D3D11_SAMPLER_DESC sampDesc;
    ZeroMemory( &sampDesc, sizeof(sampDesc) );
    sampDesc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
    sampDesc.AddressU = D3D11_TEXTURE_ADDRESS_CLAMP        ;
    sampDesc.AddressV = D3D11_TEXTURE_ADDRESS_CLAMP        ;
    sampDesc.AddressW = D3D11_TEXTURE_ADDRESS_CLAMP        ;
    sampDesc.ComparisonFunc = D3D11_COMPARISON_NEVER;
    sampDesc.MinLOD = 0;
    sampDesc.MaxLOD = 0;
    hr = pd3dDevice->CreateSamplerState( &sampDesc, &g_pSamLinear );

	// render target view
	D3D11_RENDER_TARGET_VIEW_DESC target_info;
	target_info.Format = format;
	target_info.ViewDimension = D3D11_RTV_DIMENSION_TEXTURE2D;
	target_info.Texture2D.MipSlice = 0;
	hr = pd3dDevice->CreateRenderTargetView(original_texture, &target_info ,&rtv_render_to_texture_ori);
	hr = pd3dDevice->CreateRenderTargetView(texture1, &target_info ,&rtv_render_to_texture_1);
	hr = pd3dDevice->CreateRenderTargetView(texture2, &target_info ,&rtv_render_to_texture_2);

	D3D11_SHADER_RESOURCE_VIEW_DESC shader_resource_info;
	shader_resource_info.Format = format;
	shader_resource_info.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
	shader_resource_info.Texture2D . MostDetailedMip = 0;
	shader_resource_info.Texture2D . MipLevels = 1;
	hr = pd3dDevice->CreateShaderResourceView(original_texture, &shader_resource_info ,&sr_texture_original);
	hr = pd3dDevice->CreateShaderResourceView(texture1, &shader_resource_info ,&sr_texture1);
	hr = pd3dDevice->CreateShaderResourceView(texture2, &shader_resource_info ,&sr_texture2);
    return S_OK;
}

//--------------------------------------------------------------------------------------
// Create any D3D9 resources that won't live through a device reset (D3DPOOL_DEFAULT) 
// or that are tied to the back buffer size 
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnD3D9ResetDevice( IDirect3DDevice9* pd3dDevice,
                                    const D3DSURFACE_DESC* pBackBufferSurfaceDesc, void* pUserContext )
{
#ifdef CONSOLE
	std::cout << "OnD3D9ResetDevice" << std::endl;
#endif

    HRESULT hr;

    V_RETURN( g_DialogResourceManager.OnD3D9ResetDevice() );
    V_RETURN( g_SettingsDlg.OnD3D9ResetDevice() );

    if( g_pFont9 ) V_RETURN( g_pFont9->OnResetDevice() );
    if( g_pEffect9 ) V_RETURN( g_pEffect9->OnResetDevice() );

    V_RETURN( D3DXCreateSprite( pd3dDevice, &g_pSprite9 ) );
    g_pTxtHelper = new CDXUTTextHelper( g_pFont9, g_pSprite9, NULL, NULL, 15 );

    g_HUD.SetLocation( pBackBufferSurfaceDesc->Width - 170, 0 );
    g_HUD.SetSize( 170, 170 );
    g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width - 170, pBackBufferSurfaceDesc->Height - 350 );
    g_SampleUI.SetSize( 170, 300 );

	pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
    pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
    pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
    pd3dDevice->SetSamplerState( 0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR );
    pd3dDevice->SetSamplerState( 0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR );

    pd3dDevice->SetRenderState( D3DRS_ZENABLE, TRUE );
    //pd3dDevice->SetRenderState( D3DRS_DITHERENABLE, TRUE );
    pd3dDevice->SetRenderState( D3DRS_SPECULARENABLE, TRUE );
    pd3dDevice->SetRenderState( D3DRS_LIGHTING, false );
    pd3dDevice->SetRenderState( D3DRS_AMBIENT, 0x80808080 );
	D3DLIGHT9 light;
    D3DXVECTOR3 vecLightDirUnnormalized( 10.0f, -10.0f, 10.0f );
    ZeroMemory( &light, sizeof( D3DLIGHT9 ) );
    light.Type = D3DLIGHT_DIRECTIONAL;
    light.Diffuse.r = 1.0f;
    light.Diffuse.g = 1.0f;
    light.Diffuse.b = 1.0f;
    D3DXVec3Normalize( ( D3DXVECTOR3* )&light.Direction, &vecLightDirUnnormalized );
    light.Position.x = 10.0f;
    light.Position.y = -10.0f;
    light.Position.z = 10.0f;
    light.Range = 1000.0f;
    pd3dDevice->SetLight( 0, &light );
    pd3dDevice->LightEnable( 0, TRUE );

	// Set the transform matrices
    D3DXMATRIXA16 matWorld;
    D3DXMatrixIdentity( &matWorld );
    pd3dDevice->SetTransform( D3DTS_WORLD, &matWorld );

    // Setup the camera with view & projection matrix
    D3DXVECTOR3 vecEye( 0.0f, 0.0f, -5.0f );
    D3DXVECTOR3 vecAt ( 0.0f, 0.0f, 0.0f );
    g_Camera.SetViewParams( &vecEye, &vecAt );
    float fAspectRatio = pBackBufferSurfaceDesc->Width / ( FLOAT )pBackBufferSurfaceDesc->Height;
    g_Camera.SetProjParams( D3DX_PI / 4, fAspectRatio, 1.0f, 1000.0f );

    return S_OK;
}