[vtkusers] Problem CMake 'VTK_USE_ANSI_STDLIB = ON' is slow volume rendering..

[Mathieu Malaterre]

¿ì¸®µé,

	Are those tests both in Release mode ?
Thanks,
Mathieu

¿ì¸®µé wrote:
> Thanks you for read my question..
>  
> I'm using VTK 4.2 with DCMTK in WIN2000, .Net 2002 VC++ 7.0
>  
> I have problem about VTK 4.2
>  
> That is VTK_USE_ANSI_STDLIB option...
>  
> --------------------------------------------------------
> example)
> ...
> vtkRenderer* m_pRen;
> ...
> clock_t  dwCurrTime = 0;
> clock_t  dwSetWorldPointTime = 0;
> clock_t  dwWorldToDisplayTime = 0;
> clock_t  dwWorldToViewTime = 0;
> clock_t  dwViewToDisplayTime = 0;
> clock_t  dwGetDisplayPointTick = 0;
> double   dwDiffTick = 0;
> double   dwAvgSetWorldPointTick = 0;
> double   dwAvgWorldToDisplayTick = 0;
> double   dwAvgWorldToViewTick = 0;
> double   dwAvgViewToDisplayTick = 0;
> double   dwAvgGetDisplayPointTick = 0;
>  
> m_pRen->SetWorldPoint(x, y, z, 1.0);
> dwSetWorldPointTime = clock();  // for check tick count 1
> m_pRen->WorldToView();
> dwWorldToViewTime = clock();  // for check tick count 2  ----|
> m_pRen->ViewToDisplay();            |    
> dwViewToDisplayTime = clock();  // for check tick count 3      | it is 
> same m_pRen->WorldToDisplay()
> m_pRen->GetDisplayPoint(wp);        ----|
> dwGetDisplayPointTick = clock(); // for check tick count 4
>  
> dwGetDisplayPointTick = clock();
>  
> dwDiffTick = (double)(dwSetWorldPointTime - dwCurrTime)/CLOCKS_PER_SEC;
> dwAvgSetWorldPointTick += dwDiffTick;
>  
> dwDiffTick = (double)(dwWorldToViewTime - 
> dwSetWorldPointTime)/CLOCKS_PER_SEC;
> dwAvgWorldToViewTick += dwDiffTick;
>  
> dwDiffTick = (double)(dwViewToDisplayTime - 
> dwWorldToViewTime)/CLOCKS_PER_SEC;
> dwAvgViewToDisplayTick += dwDiffTick;
>  
> dwDiffTick = (double)(dwGetDisplayPointTick - 
> dwViewToDisplayTime)/CLOCKS_PER_SEC;
> dwAvgGetDisplayPointTick += dwDiffTick;
>  
> ......
> --------------------------------------------------------
>  
> 
> Volume Rendering width DICOM Image (128x128 size)
> use vtkVolumeTextureMapper2D...
> in my case  :
> 1) image count = 5
> VTK_USE_ANSI_STDLIB = ON  ->  dwAvgWorldToViewTick is 4.124
> VTK_USE_ANSI_STDLIB = OFF ->  dwAvgWorldToViewTick is 1.17
> 2) image count = 30
> VTK_USE_ANSI_STDLIB = ON  ->  dwAvgWorldToViewTick is 23.985
> VTK_USE_ANSI_STDLIB = OFF ->  dwAvgWorldToViewTick is 6.858
>  
> I don't know reason..
>  
> please answer me this question...
>  
> 
> 
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> 
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