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Estimating surface curvature of .x 3Dfilesc..

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Hi allc I am new comer from japanc.. I have a problem. I want to calculate curvature of 3D triangular mesh. I can load .X mesh in directX9. But I donft know how to calculate curvature (principal curvature) of that mesh. Do you have any example or tutorialc. Please help me thanks.

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Hi nik02 ,,,,,,,,,,,,,,,,,,thank youcc.
I donft want to use shader languages (I am new for directX and I donft know shaders) I need to use simple directX9. Please explain me in little example it is great help for me now.

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In the other thread, I specifically recommended against, not for using shaders to achieve curvature calculation [smile]

To access a mesh's internal data, you call GetVertexBuffer, GetIndexBuffer and GetAttributeTable, among a few other functions. To access individual vertex data, for example, you lock the vertex buffer (hence gaining a pointer to the vertices), do whatever you want with the data, and unlock the vb to tell the device that it is allowed to use the data again.

The actual implementation of curvature calculation I leave as an excercise for you - I haven't implemented it myself either :)

Kind regards,
-Nik

PS. See the other thread for a very good link regarding the theory of the problem!

EDIT: I'll be happy to help you regarding the DirectX-related part, though.

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Hi Nik02c.. here is sample code (optimized mesh example) from directX. Where can I put curvature calculationscc


#include "dxstdafx.h"
#include "resource.h"

//#define DEBUG_VS // Uncomment this line to debug vertex shaders
//#define DEBUG_PS // Uncomment this line to debug pixel shaders

#define MESHFILENAME L"Media/dress.x"


struct SStripData
{
LPDIRECT3DINDEXBUFFER9 m_pStrips; // strip indices (single strip)
LPDIRECT3DINDEXBUFFER9 m_pStripsMany; // strip indices (many strips)

DWORD m_cStripIndices;
DWORD *m_rgcStripLengths;
DWORD m_cStrips;

SStripData() :
m_pStrips(NULL),
m_pStripsMany(NULL),
m_cStripIndices(0),
m_rgcStripLengths(NULL)
{ }
};


struct SMeshData
{
LPD3DXMESH m_pMeshSysMem; // System memory copy of mesh

LPD3DXMESH m_pMesh; // Local version of mesh, copied on resize
LPDIRECT3DVERTEXBUFFER9 m_pVertexBuffer; // vertex buffer of mesh

SStripData *m_rgStripData; // strip indices split by attribute
DWORD m_cStripDatas;

SMeshData() :
m_pMeshSysMem(NULL),
m_pMesh(NULL),
m_pVertexBuffer(NULL),
m_rgStripData(NULL),
m_cStripDatas(0)
{ }

void ReleaseLocalMeshes()
{
SAFE_RELEASE( m_pMesh );
SAFE_RELEASE( m_pVertexBuffer );
}

void ReleaseAll()
{
SAFE_RELEASE( m_pMeshSysMem );
SAFE_RELEASE( m_pMesh );
SAFE_RELEASE( m_pVertexBuffer );

for( DWORD iStripData = 0; iStripData < m_cStripDatas; iStripData++ )
{
SAFE_RELEASE( m_rgStripData[iStripData].m_pStrips );
SAFE_RELEASE( m_rgStripData[iStripData].m_pStripsMany );
delete[] m_rgStripData[iStripData].m_rgcStripLengths;
}

delete[] m_rgStripData;
m_rgStripData = NULL;
m_cStripDatas = 0;
}
};


//--------------------------------------------------------------------------------------
// Global variables
//--------------------------------------------------------------------------------------
ID3DXFont* g_pFont = NULL; // Font for drawing text
ID3DXSprite* g_pTextSprite = NULL; // Sprite for batching draw text calls
ID3DXEffect* g_pEffect = NULL; // D3DX effect interface
CModelViewerCamera g_Camera; // A model viewing camera
IDirect3DTexture9* g_pDefaultTex = NULL; // A default texture
bool g_bShowHelp = true; // If true, it renders the UI control text
CDXUTDialog g_HUD; // dialog for standard controls
CDXUTDialog g_SampleUI; // dialog for sample specific controls
bool g_bShowVertexCacheOptimized = true;
bool g_bShowStripReordered = false;
bool g_bShowStrips = false;
bool g_bShowSingleStrip = false;
bool g_bForce32ByteFVF = true;
bool g_bCantDoSingleStrip = false;// Single strip would be too many primitives
D3DXVECTOR3 g_vObjectCenter; // Center of bounding sphere of object
FLOAT g_fObjectRadius; // Radius of bounding sphere of object
D3DXMATRIXA16 g_matWorld;
int g_cObjectsPerSide = 1; // sqrt of the number of objects to draw
DWORD g_dwMemoryOptions = D3DXMESH_MANAGED;
// various forms of mesh data
SMeshData g_MeshAttrSorted;
SMeshData g_MeshStripReordered;
SMeshData g_MeshVertexCacheOptimized;

DWORD g_dwNumMaterials = 0; // Number of materials
IDirect3DTexture9** g_ppMeshTextures = NULL;
D3DMATERIAL9* g_pMeshMaterials = NULL;


//--------------------------------------------------------------------------------------
// UI control IDs
//--------------------------------------------------------------------------------------
#define IDC_TOGGLEFULLSCREEN 1
#define IDC_TOGGLEREF 3
#define IDC_CHANGEDEVICE 4
#define IDC_MESHTYPE 5
#define IDC_GRIDSIZE 6
#define IDC_PRIMTYPE 7


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

void InitApp();
HRESULT LoadMesh( IDirect3DDevice9* pd3dDevice, WCHAR* strFileName, ID3DXMesh** ppMesh );
void RenderText();
HRESULT LoadMeshData( IDirect3DDevice9 *pd3dDevice, LPCWSTR wszMeshFile, LPD3DXMESH *pMeshSysMemLoaded, LPD3DXBUFFER *ppAdjacencyBuffer );
HRESULT OptimizeMeshData( LPD3DXMESH pMeshSysMem, LPD3DXBUFFER pAdjacencyBuffer, DWORD dwOptFlags, SMeshData *pMeshData );
HRESULT UpdateLocalMeshes( IDirect3DDevice9 *pd3dDevice, SMeshData *pMeshData );
HRESULT DrawMeshData( ID3DXEffect *pEffect, SMeshData *pMeshData );


//--------------------------------------------------------------------------------------
// Entry point to the program. Initializes everything and goes into a message processing
// loop. Idle time is used to render the scene.
//--------------------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE, HINSTANCE, LPSTR, int )
{
// Set the callback functions. These functions allow the sample framework to notify
// the application about device changes, user input, and windows messages. The
// callbacks are optional so you need only set callbacks for events you're interested
// in. However, if you don't handle the device reset/lost callbacks then the sample
// framework won't be able to reset your device since the application must first
// release all device resources before resetting. Likewise, if you don't handle the
// device created/destroyed callbacks then the sample framework won't be able to
// recreate your device resources.
DXUTSetCallbackDeviceCreated( OnCreateDevice );
DXUTSetCallbackDeviceReset( OnResetDevice );
DXUTSetCallbackDeviceLost( OnLostDevice );
DXUTSetCallbackDeviceDestroyed( OnDestroyDevice );
DXUTSetCallbackMsgProc( MsgProc );
DXUTSetCallbackKeyboard( KeyboardProc );
DXUTSetCallbackFrameRender( OnFrameRender );
DXUTSetCallbackFrameMove( OnFrameMove );

// Show the cursor and clip it when in full screen
DXUTSetCursorSettings( true, true );

InitApp();

// Initialize the sample framework and create the desired Win32 window and Direct3D
// device for the application. Calling each of these functions is optional, but they
// allow you to set several options which control the behavior of the framework.
DXUTInit( true, true, true ); // Parse the command line, handle the default hotkeys, and show msgboxes
DXUTCreateWindow( L"OptimizedMesh: Optimizing Meshes in D3D" );
DXUTCreateDevice( D3DADAPTER_DEFAULT, true, 640, 480, IsDeviceAcceptable, ModifyDeviceSettings );

// Pass control to the sample framework for handling the message pump and
// dispatching render calls. The sample framework will call your FrameMove
// and FrameRender callback when there is idle time between handling window messages.
DXUTMainLoop();

// Perform any application-level cleanup here. Direct3D device resources are released within the
// appropriate callback functions and therefore don't require any cleanup code here.

return DXUTGetExitCode();
}


//--------------------------------------------------------------------------------------
// Initialize the app
//--------------------------------------------------------------------------------------
void InitApp()
{
// Initialize dialogs
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 );

g_SampleUI.SetCallback( OnGUIEvent ); iY = 10;
g_SampleUI.AddComboBox( IDC_MESHTYPE, 0, iY, 200, 20, L'M' );
g_SampleUI.GetComboBox( IDC_MESHTYPE )->AddItem( L"(M)esh type: VCache optimized", (void*)0 );
g_SampleUI.GetComboBox( IDC_MESHTYPE )->AddItem( L"(M)esh type: Strip reordered", (void*)1 );
g_SampleUI.GetComboBox( IDC_MESHTYPE )->AddItem( L"(M)esh type: Unoptimized", (void*)2 );
g_SampleUI.AddComboBox( IDC_PRIMTYPE, 0, iY += 24, 200, 20, L'P' );
g_SampleUI.GetComboBox( IDC_PRIMTYPE )->AddItem( L"(P)rimitive: Triangle list", (void*)0 );
g_SampleUI.GetComboBox( IDC_PRIMTYPE )->AddItem( L"(P)rimitive: Single tri strip", (void*)0 );
g_SampleUI.GetComboBox( IDC_PRIMTYPE )->AddItem( L"(P)rimitive: Many tri strips", (void*)0 );
g_SampleUI.AddComboBox( IDC_GRIDSIZE, 0, iY += 24, 200, 20, L'G' );
g_SampleUI.GetComboBox( IDC_GRIDSIZE )->AddItem( L"(G)rid size: 1 mesh", (void*)1 );
g_SampleUI.GetComboBox( IDC_GRIDSIZE )->AddItem( L"(G)rid size: 4 mesh", (void*)2 );
g_SampleUI.GetComboBox( IDC_GRIDSIZE )->AddItem( L"(G)rid size: 9 mesh", (void*)3 );
g_SampleUI.GetComboBox( IDC_GRIDSIZE )->AddItem( L"(G)rid size: 16 mesh", (void*)4 );
g_SampleUI.GetComboBox( IDC_GRIDSIZE )->AddItem( L"(G)rid size: 25 mesh", (void*)5 );
g_SampleUI.GetComboBox( IDC_GRIDSIZE )->AddItem( L"(G)rid size: 36 mesh", (void*)6 );

g_Camera.SetButtonMasks( MOUSE_LEFT_BUTTON, MOUSE_WHEEL, 0 );
}


//--------------------------------------------------------------------------------------
// Called during device initialization, this code checks the device for some
// minimum set of capabilities, and rejects those that don't pass by returning false.
//--------------------------------------------------------------------------------------
bool CALLBACK IsDeviceAcceptable( D3DCAPS9* pCaps, D3DFORMAT AdapterFormat,
D3DFORMAT BackBufferFormat, bool bWindowed )
{
// Skip backbuffer formats that don't support alpha blending
IDirect3D9* pD3D = DXUTGetD3DObject();
if( FAILED( pD3D->CheckDeviceFormat( pCaps->AdapterOrdinal, pCaps->DeviceType,
AdapterFormat, D3DUSAGE_QUERY_POSTPIXELSHADER_BLENDING,
D3DRTYPE_TEXTURE, BackBufferFormat ) ) )
return false;

return true;
}


//--------------------------------------------------------------------------------------
// This callback function is called immediately before a device is created to allow the
// application to modify the device settings. The supplied pDeviceSettings parameter
// contains the settings that the framework has selected for the new device, and the
// application can make any desired changes directly to this structure. Note however that
// the sample framework will not correct invalid device settings so care must be taken
// to return valid device settings, otherwise IDirect3D9::CreateDevice() will fail.
//--------------------------------------------------------------------------------------
void CALLBACK ModifyDeviceSettings( DXUTDeviceSettings* pDeviceSettings, const D3DCAPS9* pCaps )
{
// If device doesn't support HW T&L or doesn't support 1.1 vertex shaders in HW
// then switch to SWVP.
if( (pCaps->DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT) == 0 ||
pCaps->VertexShaderVersion < D3DVS_VERSION(1,1) )
{
pDeviceSettings->BehaviorFlags = D3DCREATE_SOFTWARE_VERTEXPROCESSING;
}
else
{
pDeviceSettings->BehaviorFlags = D3DCREATE_HARDWARE_VERTEXPROCESSING;
}

// This application is designed to work on a pure device by not using
// IDirect3D9::Get*() methods, so create a pure device if supported and using HWVP.
if ((pCaps->DevCaps & D3DDEVCAPS_PUREDEVICE) != 0 &&
(pDeviceSettings->BehaviorFlags & D3DCREATE_HARDWARE_VERTEXPROCESSING) != 0 )
pDeviceSettings->BehaviorFlags |= D3DCREATE_PUREDEVICE;

// Debugging vertex shaders requires either REF or software vertex processing
// and debugging pixel shaders requires REF.
#ifdef DEBUG_VS
if( pDeviceSettings->DeviceType != D3DDEVTYPE_REF )
{
pDeviceSettings->BehaviorFlags &= ~D3DCREATE_HARDWARE_VERTEXPROCESSING;
pDeviceSettings->BehaviorFlags &= ~D3DCREATE_PUREDEVICE;
pDeviceSettings->BehaviorFlags |= D3DCREATE_SOFTWARE_VERTEXPROCESSING;
}
#endif
#ifdef DEBUG_PS
pDeviceSettings->DeviceType = D3DDEVTYPE_REF;
#endif
}


HRESULT LoadMeshData( IDirect3DDevice9 *pd3dDevice, LPCWSTR wszMeshFile, LPD3DXMESH *pMeshSysMemLoaded, LPD3DXBUFFER *ppAdjacencyBuffer )
{
LPDIRECT3DVERTEXBUFFER9 pMeshVB = NULL;
LPD3DXBUFFER pD3DXMtrlBuffer = NULL;
void* pVertices;
WCHAR strMesh[512];
HRESULT hr = S_OK;
LPD3DXMESH pMeshSysMem = NULL;
LPD3DXMESH pMeshTemp;
D3DXMATERIAL* d3dxMaterials;

// Get a path to the media file
if( FAILED( hr = DXUTFindDXSDKMediaFileCch( strMesh, 512, wszMeshFile ) ) )
goto End;

// Load the mesh from the specified file
hr = D3DXLoadMeshFromX( strMesh, D3DXMESH_SYSTEMMEM, pd3dDevice,
ppAdjacencyBuffer, &pD3DXMtrlBuffer, NULL,
&g_dwNumMaterials, &pMeshSysMem );
if( FAILED(hr) )
goto End;

// Get the array of materials out of the returned buffer, and allocate a texture array
d3dxMaterials = (D3DXMATERIAL*)pD3DXMtrlBuffer->GetBufferPointer();
g_pMeshMaterials = new D3DMATERIAL9[g_dwNumMaterials];
if( g_pMeshMaterials == NULL )
{
hr = E_OUTOFMEMORY;
goto End;
}
g_ppMeshTextures = new LPDIRECT3DTEXTURE9[g_dwNumMaterials];
if( g_ppMeshTextures == NULL )
{
hr = E_OUTOFMEMORY;
goto End;
}

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

// Get a path to the texture
WCHAR strPath[512];
if( d3dxMaterials[i].pTextureFilename != NULL )
{
WCHAR wszBuf[MAX_PATH];
MultiByteToWideChar( CP_ACP, 0, d3dxMaterials[i].pTextureFilename, -1, wszBuf, MAX_PATH );
wszBuf[MAX_PATH - 1] = L'\0';
DXUTFindDXSDKMediaFileCch( strPath, 512, wszBuf );

// Load the texture
D3DXCreateTextureFromFile( pd3dDevice, strPath, &g_ppMeshTextures[i] );
} else
{
// Use the default texture
g_ppMeshTextures[i] = g_pDefaultTex;
g_ppMeshTextures[i]->AddRef();
}
}

// Done with the material buffer
SAFE_RELEASE( pD3DXMtrlBuffer );

// Lock the vertex buffer, to generate a simple bounding sphere
hr = pMeshSysMem->GetVertexBuffer( &pMeshVB );
if( SUCCEEDED(hr) )
{
hr = pMeshVB->Lock( 0, 0, &pVertices, D3DLOCK_NOSYSLOCK );
if( SUCCEEDED(hr) )
{
D3DXComputeBoundingSphere( (D3DXVECTOR3*)pVertices, pMeshSysMem->GetNumVertices(),
D3DXGetFVFVertexSize( pMeshSysMem->GetFVF() ),
&g_vObjectCenter, &g_fObjectRadius );
pMeshVB->Unlock();
}
pMeshVB->Release();
} else
goto End;

// remember if there were normals in the file, before possible clone operation
bool bNormalsInFile = ( pMeshSysMem->GetFVF() & D3DFVF_NORMAL ) != 0;

// if using 32byte vertices, check fvf
if( g_bForce32ByteFVF )
{
// force 32 byte vertices
if( pMeshSysMem->GetFVF() != (D3DFVF_XYZ|D3DFVF_NORMAL|D3DFVF_TEX1) )
{
hr = pMeshSysMem->CloneMeshFVF( pMeshSysMem->GetOptions(), D3DFVF_XYZ|D3DFVF_NORMAL|D3DFVF_TEX1,
pd3dDevice, &pMeshTemp );
if( FAILED(hr) )
goto End;

pMeshSysMem->Release();
pMeshSysMem = pMeshTemp;
}
}
// otherwise, just make sure that there are normals in mesh
else if ( !(pMeshSysMem->GetFVF() & D3DFVF_NORMAL) )
{
hr = pMeshSysMem->CloneMeshFVF( pMeshSysMem->GetOptions(), pMeshSysMem->GetFVF() | D3DFVF_NORMAL,
pd3dDevice, &pMeshTemp );
if (FAILED(hr))
goto End;

pMeshSysMem->Release();
pMeshSysMem = pMeshTemp;
}

// Compute normals for the mesh, if not present
if( !bNormalsInFile )
D3DXComputeNormals( pMeshSysMem, NULL );

*pMeshSysMemLoaded = pMeshSysMem;
pMeshSysMem = NULL;

End:
SAFE_RELEASE( pMeshSysMem );

return hr;
}


HRESULT OptimizeMeshData( LPD3DXMESH pMeshSysMem, LPD3DXBUFFER pAdjacencyBuffer, DWORD dwOptFlags, SMeshData *pMeshData )
{
HRESULT hr = S_OK;
LPD3DXBUFFER pbufTemp = NULL;

// Attribute sort - the un-optimized mesh option
// remember the adjacency for the vertex cache optimization
hr = pMeshSysMem->Optimize( dwOptFlags | D3DXMESH_SYSTEMMEM,
(DWORD*)pAdjacencyBuffer->GetBufferPointer(),
NULL, NULL, NULL, &pMeshData->m_pMeshSysMem );
if( FAILED(hr) )
goto End;

pMeshData->m_cStripDatas = g_dwNumMaterials;
pMeshData->m_rgStripData = new SStripData[ pMeshData->m_cStripDatas ];
if( pMeshData->m_rgStripData == NULL )
{
hr = E_OUTOFMEMORY;
goto End;
}

g_bCantDoSingleStrip = false;
for( DWORD iMaterial = 0; iMaterial < g_dwNumMaterials; iMaterial++ )
{
hr = D3DXConvertMeshSubsetToSingleStrip( pMeshData->m_pMeshSysMem, iMaterial,
D3DXMESH_IB_MANAGED, &pMeshData->m_rgStripData[iMaterial].m_pStrips,
&pMeshData->m_rgStripData[iMaterial].m_cStripIndices);
if( FAILED(hr) )
goto End;

UINT primCount = pMeshData->m_rgStripData[iMaterial].m_cStripIndices - 2;

IDirect3DDevice9 *pd3dDevice;
D3DCAPS9 d3dCaps;
pMeshSysMem->GetDevice( &pd3dDevice );
pd3dDevice->GetDeviceCaps( &d3dCaps );
SAFE_RELEASE( pd3dDevice );
if( primCount > d3dCaps.MaxPrimitiveCount )
{
g_bCantDoSingleStrip = true;
}

hr = D3DXConvertMeshSubsetToStrips( pMeshData->m_pMeshSysMem, iMaterial,
D3DXMESH_IB_MANAGED, &pMeshData->m_rgStripData[iMaterial].m_pStripsMany,
NULL, &pbufTemp, &pMeshData->m_rgStripData[iMaterial].m_cStrips);
if( FAILED(hr) )
goto End;

pMeshData->m_rgStripData[iMaterial].m_rgcStripLengths = new DWORD[pMeshData->m_rgStripData[iMaterial].m_cStrips];
if( pMeshData->m_rgStripData[iMaterial].m_rgcStripLengths == NULL )
{
hr = E_OUTOFMEMORY;
goto End;
}
memcpy( pMeshData->m_rgStripData[iMaterial].m_rgcStripLengths,
pbufTemp->GetBufferPointer(),
sizeof(DWORD) * pMeshData->m_rgStripData[iMaterial].m_cStrips );
}

End:
SAFE_RELEASE( pbufTemp );

return hr;
}


HRESULT UpdateLocalMeshes( IDirect3DDevice9 *pd3dDevice, SMeshData *pMeshData )
{
HRESULT hr = S_OK;

// if a mesh was loaded, update the local meshes
if( pMeshData->m_pMeshSysMem != NULL )
{
hr = pMeshData->m_pMeshSysMem->CloneMeshFVF( g_dwMemoryOptions | D3DXMESH_VB_WRITEONLY, pMeshData->m_pMeshSysMem->GetFVF(),
pd3dDevice, &pMeshData->m_pMesh );
if( FAILED(hr) )
return hr;

hr = pMeshData->m_pMesh->GetVertexBuffer( &pMeshData->m_pVertexBuffer );
if( FAILED(hr) )
return hr;
}

return hr;
}


HRESULT DrawMeshData( IDirect3DDevice9 *pd3dDevice, ID3DXEffect *pEffect, SMeshData *pMeshData )
{
HRESULT hr;
DWORD iCurFace;

V( pEffect->SetTechnique( "RenderScene" ) );
UINT cPasses;
V( pEffect->Begin( &cPasses, 0 ) );
for( UINT p = 0; p < cPasses; ++p )
{
V( pEffect->BeginPass( p ) );

// Set and draw each of the materials in the mesh
for( DWORD iMaterial = 0; iMaterial < g_dwNumMaterials; iMaterial++ )
{
V( pEffect->SetVector( "g_vDiffuse", (D3DXVECTOR4*)&g_pMeshMaterials[iMaterial].Diffuse ) );
V( pEffect->SetTexture( "g_txScene", g_ppMeshTextures[iMaterial] ) );
V( pEffect->CommitChanges() );
// V( pd3dDevice->SetMaterial( &g_pMeshMaterials[iMaterial] ) );
// V( pd3dDevice->SetTexture( 0, g_ppMeshTextures[iMaterial] ) );

if( !g_bShowStrips && !g_bShowSingleStrip )
{
V( pMeshData->m_pMesh->DrawSubset( iMaterial ) );
}
else // drawing strips
{
DWORD dwFVF;
DWORD cBytesPerVertex;
DWORD iStrip;

dwFVF = pMeshData->m_pMesh->GetFVF();
cBytesPerVertex = D3DXGetFVFVertexSize( dwFVF );

V( pd3dDevice->SetFVF( dwFVF ) );
V( pd3dDevice->SetStreamSource( 0, pMeshData->m_pVertexBuffer, 0, cBytesPerVertex ) );

if( g_bShowSingleStrip )
{
if( !g_bCantDoSingleStrip )
{
V( pd3dDevice->SetIndices( pMeshData->m_rgStripData[iMaterial].m_pStrips ) );

V( pd3dDevice->DrawIndexedPrimitive( D3DPT_TRIANGLESTRIP, 0,
0, pMeshData->m_pMesh->GetNumVertices(),
0, pMeshData->m_rgStripData[iMaterial].m_cStripIndices - 2 ) );
}
}
else
{
V( pd3dDevice->SetIndices( pMeshData->m_rgStripData[iMaterial].m_pStripsMany ) );

iCurFace = 0;
for( iStrip = 0; iStrip < pMeshData->m_rgStripData[iMaterial].m_cStrips; iStrip++ )
{
V( pd3dDevice->DrawIndexedPrimitive( D3DPT_TRIANGLESTRIP, 0,
0, pMeshData->m_pMesh->GetNumVertices(),
iCurFace, pMeshData->m_rgStripData[iMaterial].m_rgcStripLengths[iStrip] ) );

iCurFace += 2 + pMeshData->m_rgStripData[iMaterial].m_rgcStripLengths[iStrip];
}
}
}
}
V( pEffect->EndPass() );
}
V( pEffect->End() );

return S_OK;
}


//--------------------------------------------------------------------------------------
// This callback function will be called immediately after the Direct3D device has been
// created, which will happen during application initialization and windowed/full screen
// toggles. This is the best location to create D3DPOOL_MANAGED resources since these
// resources need to be reloaded whenever the device is destroyed. Resources created
// here should be released in the OnDestroyDevice callback.
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnCreateDevice( IDirect3DDevice9* pd3dDevice, const D3DSURFACE_DESC* pBackBufferSurfaceDesc )
{
HRESULT hr;

// Create the 1x1 white default texture
V_RETURN( pd3dDevice->CreateTexture( 1, 1, 1, 0, D3DFMT_A8R8G8B8,
D3DPOOL_MANAGED, &g_pDefaultTex, NULL ) );
D3DLOCKED_RECT lr;
V_RETURN( g_pDefaultTex->LockRect( 0, &lr, NULL, 0 ) );
*(LPDWORD)lr.pBits = D3DCOLOR_RGBA( 255, 255, 255, 255 );
V_RETURN( g_pDefaultTex->UnlockRect( 0 ) );

// Initialize the font
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 ) );

// Define DEBUG_VS and/or DEBUG_PS to debug vertex and/or pixel shaders with the
// shader debugger. Debugging vertex shaders requires either REF or software vertex
// processing, and debugging pixel shaders requires REF. The
// D3DXSHADER_FORCE_*_SOFTWARE_NOOPT flag improves the debug experience in the
// shader debugger. It enables source level debugging, prevents instruction
// reordering, prevents dead code elimination, and forces the compiler to compile
// against the next higher available software target, which ensures that the
// unoptimized shaders do not exceed the shader model limitations. Setting these
// flags will cause slower rendering since the shaders will be unoptimized and
// forced into software. See the DirectX documentation for more information about
// using the shader debugger.
DWORD dwShaderFlags = 0;
#ifdef DEBUG_VS
dwShaderFlags |= D3DXSHADER_FORCE_VS_SOFTWARE_NOOPT;
#endif
#ifdef DEBUG_PS
dwShaderFlags |= D3DXSHADER_FORCE_PS_SOFTWARE_NOOPT;
#endif

// Read the D3DX effect file
WCHAR str[MAX_PATH];
V_RETURN( DXUTFindDXSDKMediaFileCch( str, MAX_PATH, L"OptimizedMesh.fx" ) );

// If this fails, there should be debug output as to
// they the .fx file failed to compile
V_RETURN( D3DXCreateEffectFromFile( pd3dDevice, str, NULL, NULL, dwShaderFlags,
NULL, &g_pEffect, NULL ) );

// Load mesh
LPD3DXMESH pMeshSysMem = NULL;
LPD3DXBUFFER pAdjacencyBuffer = NULL;

hr = LoadMeshData( pd3dDevice, MESHFILENAME, &pMeshSysMem, &pAdjacencyBuffer );
if( SUCCEEDED(hr) )
{
hr = OptimizeMeshData( pMeshSysMem, pAdjacencyBuffer, D3DXMESHOPT_ATTRSORT, &g_MeshAttrSorted );
if( SUCCEEDED(hr) )
hr = OptimizeMeshData( pMeshSysMem, pAdjacencyBuffer, D3DXMESHOPT_STRIPREORDER, &g_MeshStripReordered );

if( SUCCEEDED(hr) )
hr = OptimizeMeshData( pMeshSysMem, pAdjacencyBuffer, D3DXMESHOPT_VERTEXCACHE, &g_MeshVertexCacheOptimized );

SAFE_RELEASE( pMeshSysMem );
SAFE_RELEASE( pAdjacencyBuffer );
} else
// ignore load errors, just draw blank screen if mesh is invalid
hr = S_OK;

D3DXMatrixTranslation( &g_matWorld, -g_vObjectCenter.x,
-g_vObjectCenter.y,
-g_vObjectCenter.z );

// Setup the camera's view parameters
D3DXVECTOR3 vecEye(0.0f, 0.0f, -50.0f);
D3DXVECTOR3 vecAt (0.0f, 0.0f, 0.0f);
g_Camera.SetViewParams( &vecEye, &vecAt );

return S_OK;
}


//--------------------------------------------------------------------------------------
// This callback function will be called immediately after the Direct3D device has been
// reset, which will happen after a lost device scenario. This is the best location to
// create D3DPOOL_DEFAULT resources since these resources need to be reloaded whenever
// the device is lost. Resources created here should be released in the OnLostDevice
// callback.
//--------------------------------------------------------------------------------------
HRESULT CALLBACK OnResetDevice( IDirect3DDevice9* pd3dDevice,
const D3DSURFACE_DESC* pBackBufferSurfaceDesc )
{
HRESULT hr;

if( g_pFont )
V_RETURN( g_pFont->OnResetDevice() );
if( g_pEffect )
V_RETURN( g_pEffect->OnResetDevice() );

// Create a sprite to help batch calls when drawing many lines of text
V_RETURN( D3DXCreateSprite( pd3dDevice, &g_pTextSprite ) );

// Setup the camera's projection parameters
float fAspectRatio = pBackBufferSurfaceDesc->Width / (FLOAT)pBackBufferSurfaceDesc->Height;
g_Camera.SetProjParams( D3DX_PI/4, fAspectRatio, 0.1f, 1000.0f );
g_Camera.SetWindow( pBackBufferSurfaceDesc->Width, pBackBufferSurfaceDesc->Height );

// update the local copies of the meshes
UpdateLocalMeshes( pd3dDevice, &g_MeshAttrSorted );
UpdateLocalMeshes( pd3dDevice, &g_MeshStripReordered );
UpdateLocalMeshes( pd3dDevice, &g_MeshVertexCacheOptimized );

g_HUD.SetLocation( pBackBufferSurfaceDesc->Width-170, 0 );
g_HUD.SetSize( 170, 170 );
g_SampleUI.SetLocation( pBackBufferSurfaceDesc->Width-200, pBackBufferSurfaceDesc->Height-350 );
g_SampleUI.SetSize( 200, 300 );

return S_OK;
}


//--------------------------------------------------------------------------------------
// This callback function will be called once at the beginning of every frame. This is the
// best location for your application to handle updates to the scene, but is not
// intended to contain actual rendering calls, which should instead be placed in the
// OnFrameRender callback.
//--------------------------------------------------------------------------------------
void CALLBACK OnFrameMove( IDirect3DDevice9* pd3dDevice, double fTime, float fElapsedTime )
{
// Update the camera's position based on user input
g_Camera.FrameMove( fElapsedTime );
}


//--------------------------------------------------------------------------------------
// This callback function will be called at the end of every frame to perform all the
// rendering calls for the scene, and it will also be called if the window needs to be
// repainted. After this function has returned, the sample framework will call
// IDirect3DDevice9::Present to display the contents of the next buffer in the swap chain
//--------------------------------------------------------------------------------------
void CALLBACK OnFrameRender( IDirect3DDevice9* pd3dDevice, double fTime, float fElapsedTime )
{
HRESULT hr;
D3DXMATRIXA16 mWorld;
D3DXMATRIXA16 mView;
D3DXMATRIXA16 mProj;
D3DXMATRIXA16 mWorldViewProjection;

// Clear the render target and the zbuffer
V( pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, D3DCOLOR_ARGB(0, 66, 75, 121), 1.0f, 0) );

// Render the scene
if( SUCCEEDED( pd3dDevice->BeginScene() ) )
{
// Get the projection & view matrix from the camera class
// mWorld = *g_Camera.GetWorldMatrix();
mProj = *g_Camera.GetProjMatrix();
mView = *g_Camera.GetViewMatrix();

DXUT_BeginPerfEvent( DXUT_PERFEVENTCOLOR, L"Draw mesh" );

for( int xOffset = 0; xOffset < g_cObjectsPerSide; xOffset++ )
{
for( int yOffset = 0; yOffset < g_cObjectsPerSide; yOffset++ )
{
D3DXMatrixTranslation( &mWorld, g_fObjectRadius * ( xOffset * 2 - g_cObjectsPerSide + 1 ),
g_fObjectRadius * ( yOffset * 2 - g_cObjectsPerSide + 1 ),
0 );
D3DXMatrixMultiply( &mWorld, g_Camera.GetWorldMatrix(), &mWorld );
D3DXMatrixMultiply( &mWorld, &g_matWorld, &mWorld );

mWorldViewProjection = mWorld * mView * mProj;
// Update the effect's variables. Instead of using strings, it would
// be more efficient to cache a handle to the parameter by calling
// ID3DXEffect::GetParameterByName
V( g_pEffect->SetMatrix( "g_mWorldViewProjection", &mWorldViewProjection ) );
V( g_pEffect->SetMatrix( "g_mWorld", &mWorld ) );

if( g_bShowVertexCacheOptimized )
DrawMeshData( pd3dDevice, g_pEffect, &g_MeshVertexCacheOptimized );
else if( g_bShowStripReordered )
DrawMeshData( pd3dDevice, g_pEffect, &g_MeshStripReordered );
else
DrawMeshData( pd3dDevice, g_pEffect, &g_MeshAttrSorted );
}
}

DXUT_EndPerfEvent(); // end of drawing code

{
CDXUTPerfEventGenerator g( DXUT_PERFEVENTCOLOR, L"HUD / Stats" );
RenderText();
V( g_HUD.OnRender( fElapsedTime ) );
V( g_SampleUI.OnRender( fElapsedTime ) );
}

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


//--------------------------------------------------------------------------------------
// Render the help and statistics text. This function uses the ID3DXFont interface for
// efficient text rendering.
//--------------------------------------------------------------------------------------
void RenderText()
{
// The helper object simply helps keep track of text position, and color
// and then it calls pFont->DrawText( m_pSprite, strMsg, -1, &rc, DT_NOCLIP, m_clr );
// If NULL is passed in as the sprite object, then it will work however the
// pFont->DrawText() will not be batched together. Batching calls will improves performance.
CDXUTTextHelper txtHelper( g_pFont, g_pTextSprite, 15 );

WCHAR *wszOptString;
DWORD cTriangles = 0;
// Calculate and show triangles per sec, a reasonable throughput number
if( g_MeshAttrSorted.m_pMesh != NULL )
cTriangles = g_MeshAttrSorted.m_pMesh->GetNumFaces() * g_cObjectsPerSide * g_cObjectsPerSide;
else
cTriangles = 0;

float fTrisPerSec = DXUTGetFPS() * cTriangles;

if( g_bShowVertexCacheOptimized )
wszOptString = L"VCache Optimized";
else if( g_bShowStripReordered )
wszOptString = L"Strip Reordered";
else
wszOptString = L"Unoptimized";

// Output statistics
txtHelper.Begin();
txtHelper.SetInsertionPos( 5, 5 );
txtHelper.SetForegroundColor( D3DXCOLOR( 1.0f, 1.0f, 0.0f, 1.0f ) );
txtHelper.DrawTextLine( DXUTGetFrameStats() );
txtHelper.DrawTextLine( DXUTGetDeviceStats() );
txtHelper.DrawFormattedTextLine( L"%s, %ld tris per sec, %ld triangles",
wszOptString, (DWORD)fTrisPerSec, cTriangles );

if( g_bShowSingleStrip && g_bCantDoSingleStrip )
txtHelper.DrawTextLine( L"Couldn't draw to single strip -- too many primitives" );

// Draw help
if( g_bShowHelp )
{
const D3DSURFACE_DESC* pd3dsdBackBuffer = DXUTGetBackBufferSurfaceDesc();
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"Rotate mesh: Left click drag\n"
L"Zoom: mouse wheel\n"
L"Quit: ESC" );
}
else
{
txtHelper.SetForegroundColor( D3DXCOLOR( 1.0f, 1.0f, 1.0f, 1.0f ) );
txtHelper.DrawTextLine( L"Press F1 for help" );
}
txtHelper.End();
}


//--------------------------------------------------------------------------------------
// Before handling window messages, the sample framework passes incoming windows
// messages to the application through this callback function. If the application sets
// *pbNoFurtherProcessing to TRUE, then the sample framework will not process this message.
//--------------------------------------------------------------------------------------
LRESULT CALLBACK MsgProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, bool* pbNoFurtherProcessing )
{
// Give the dialogs a chance to handle the message first
*pbNoFurtherProcessing = g_HUD.MsgProc( hWnd, uMsg, wParam, lParam );
if( *pbNoFurtherProcessing )
return 0;
*pbNoFurtherProcessing = g_SampleUI.MsgProc( hWnd, uMsg, wParam, lParam );
if( *pbNoFurtherProcessing )
return 0;

// Pass all remaining windows messages to camera so it can respond to user input
g_Camera.HandleMessages( hWnd, uMsg, wParam, lParam );

return 0;
}


//--------------------------------------------------------------------------------------
// As a convenience, the sample framework inspects the incoming windows messages for
// keystroke messages and decodes the message parameters to pass relevant keyboard
// messages to the application. The framework does not remove the underlying keystroke
// messages, which are still passed to the application's MsgProc callback.
//--------------------------------------------------------------------------------------
void CALLBACK KeyboardProc( UINT nChar, bool bKeyDown, bool bAltDown )
{
if( bKeyDown )
{
switch( nChar )
{
case VK_F1: g_bShowHelp = !g_bShowHelp; break;
}
}
}


//--------------------------------------------------------------------------------------
// Handles the GUI events
//--------------------------------------------------------------------------------------
void CALLBACK OnGUIEvent( UINT nEvent, int nControlID, CDXUTControl* pControl )
{
switch( nControlID )
{
case IDC_TOGGLEFULLSCREEN: DXUTToggleFullScreen(); break;
case IDC_TOGGLEREF: DXUTToggleREF(); break;
case IDC_CHANGEDEVICE: DXUTSetShowSettingsDialog( !DXUTGetShowSettingsDialog() ); break;
case IDC_MESHTYPE:
switch( (size_t)((CDXUTComboBox*)pControl)->GetSelectedData() )
{
case 0:
g_bShowVertexCacheOptimized = true;
g_bShowStripReordered = false;
break;
case 1:
g_bShowVertexCacheOptimized = false;
g_bShowStripReordered = true;
break;
case 2:
g_bShowVertexCacheOptimized = false;
g_bShowStripReordered = false;
break;
}
break;

case IDC_PRIMTYPE:
switch( (size_t)((CDXUTComboBox*)pControl)->GetSelectedData() )
{
case 0:
g_bShowStrips = false;
g_bShowSingleStrip = false;
break;
case 1:
g_bShowStrips = false;
g_bShowSingleStrip = true;
break;
case 2:
g_bShowStrips = true;
g_bShowSingleStrip = false;
break;
}
break;

case IDC_GRIDSIZE:
g_cObjectsPerSide = (int)(size_t)((CDXUTComboBox*)pControl)->GetSelectedData();
break;
}
}


//--------------------------------------------------------------------------------------
// This callback function will be called immediately after the Direct3D device has
// entered a lost state and before IDirect3DDevice9::Reset is called. Resources created
// in the OnResetDevice callback should be released here, which generally includes all
// D3DPOOL_DEFAULT resources. See the "Lost Devices" section of the documentation for
// information about lost devices.
//--------------------------------------------------------------------------------------
void CALLBACK OnLostDevice()
{
if( g_pFont )
g_pFont->OnLostDevice();
if( g_pEffect )
g_pEffect->OnLostDevice();
SAFE_RELEASE( g_pTextSprite );

g_MeshAttrSorted.ReleaseLocalMeshes();
g_MeshStripReordered.ReleaseLocalMeshes();
g_MeshVertexCacheOptimized.ReleaseLocalMeshes();
}


//--------------------------------------------------------------------------------------
// This callback function will be called immediately after the Direct3D device has
// been destroyed, which generally happens as a result of application termination or
// windowed/full screen toggles. Resources created in the OnCreateDevice callback
// should be released here, which generally includes all D3DPOOL_MANAGED resources.
//--------------------------------------------------------------------------------------
void CALLBACK OnDestroyDevice()
{
SAFE_RELEASE(g_pEffect);
SAFE_RELEASE(g_pFont);

for( UINT i = 0; i<g_dwNumMaterials; i++ )
SAFE_RELEASE( g_ppMeshTextures[i] );
SAFE_DELETE_ARRAY( g_ppMeshTextures );
SAFE_DELETE_ARRAY( g_pMeshMaterials );
SAFE_RELEASE( g_pDefaultTex );

g_MeshAttrSorted.ReleaseAll();
g_MeshStripReordered.ReleaseAll();
g_MeshVertexCacheOptimized.ReleaseAll();

g_dwNumMaterials = 0;
}

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A handy tip just popped to my mind, I thought I'd share it with you :)

ID3DXBaseMesh contains a method called GenerateAdjacency - it can be of tremendous value in generating the vertex neighbor data needed in the curvature calculations, especially if you haven't got much previous experience in manipulating raw vertex data.

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Quote:
Original post by dud3d
Hi Nik02c.. here is sample code (optimized mesh example) from directX. Where can I put curvature calculationscc


First of all, please use source tags when posting long codes, see my example ;)
Secondly, the curvature generation can be done after you initially load the mesh:


// Load the mesh from the specified file
hr = D3DXLoadMeshFromX( strMesh, D3DXMESH_SYSTEMMEM, pd3dDevice,
ppAdjacencyBuffer, &pD3DXMtrlBuffer, NULL,
&g_dwNumMaterials, &pMeshSysMem );
if( FAILED(hr) )
goto End;

//allocate extra element to the mesh for the curvature results here,
//by cloning the mesh and specifying one extra float as a texture coordinate

//generate curvature here, in whatever way you decide to do it



It is worth noting that using a suitable vertex shader is the easiest way to visualize the curvature data once it is calculated in a pre-process step like above.

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Hi Nikc..

Itfs really difficult for me now. Because I am in beginners levelc. I shall be very grateful to if you could develop this simple code for me,

Best Regards

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Hi all

Can any programmer develop my problem I can pay for his servicecc or does anybody know place who is providing that kind of service please let me know urgently.

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As I run my own business, I don't have the luxury of much free time. I can easily provide some help for you regarding DirectX and most general graphics technologies, since they are very familiar to me and therefore the questions regarding it do not take much time to answer.

However, as I'm not an expert on curvature calculation, writing a working implementation would take at least few whole days to make and test - I just don't have the necessary free time to do that.

I hope you understand my situation - I don't genuinely want to disregard you or any others in need of help.

-Nik

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Hi Nik
I am very sorry for bothering youc. Thank you very much for your valuable comments..

Best Regards
Dud

PS: after ten hours I must find the solution but it is impossible for me as a beginner. Thatfs why I need to do this work as soon as possible. Then I can pay some one,,, only this time I wanted someonefs help after that I will learn DirectX much deeperc

[Edited by - dud3d on November 15, 2004 2:17:53 PM]

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There are several brilliant people in the GDNet boards, which may have better knowledge than me about the subject at hand. I just noticed your question first :)

I wish you success in tackling the problem at hand!

-Nik

PS. No need to be sorry; I regret that I cannot help you more.
One thing needs to be mentioned, though: I'm a firm believer of the concept that you should at least try to learn through your problems yourself before going over the lowest point of a fence. It has been proven as a good philosophy to follow in life in general, though it may not seem the easiest way... [smile]

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Quote:
Original post by dud3d
Hi Nik
I am very sorry for bothering youc. Thank you very much for your valuable comments..

Best Regards
Dud

PS: after ten hours I must find the solution but it is impossible for me as a beginner. Thatfs why I need to do this work as soon as possible. Then I can pay some one,,, only this time I wanted someonefs help after that I will learn DirectX much deeperc

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Ten hours is too little time to take on this project from the ground level, even for most professional programmers. How did you get yourself in such trouble? :)

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This is one of my assignments.. From last week few I am learning directX to do thisc but I have been trying to solve by myself since day before yesterday. But still I couldnftc thatfs why did I post my problem to this forum.

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Asking for solutions to homework problems is not tolerated. Offering to pay people to do your homework for you is REALLY REALLY not tolerated. Mention it again and get a perma-ban.

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