[vtkusers] about converting java array to vtkImageData

[David Cole]

InsertNextTuple1 adds another new tuple, but you don't need that. You've
already pre-allocated all the tuples you'll need by calling
AllocateScalars. Call SetTuple1 instead of InsertNextTuple1 and you
should see a dramatic speed up...

HTH,
David


Yixun Liu wrote:

> Hi,
> I want toconverta java 3D array(threeDarray) toa vtkImageData
> object(image).
> I do it use java as below:
> vtkImageData image = new vtkImageData();
> image.SetDimensions(iWidth, iHeight, iNumImg);
> image.SetOrigin(0.0, 0.0, 0.0);
> image.SetSpacing(spacing[0],spacing[1],spacing[2]);
> image.SetScalarType(5);
> image.AllocateScalars();
> vtkDataArray array = image.GetPointData().GetScalars();
>
> for(int iZ = 0; iY < iNumImg; iZ++){
> for(int iY= 0; iY < iHeight; iY++){
> for(int iX = 0; iX < iWidth; iX++){
> array.InsertNextTuple1(threeDarray[iZ][iY][iX]);
> }
> }
> }
> However, it is very slow due to the insertNextTuple(). Anybody tell me
> a queikly method?
> Best regards,
> Yixun Liu
>
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