[vtkusers] vtkRayCaseVolume mapper in VTK 4.0

[Amy Henderson]

At 09:42 PM 12/20/2002 +0300, Alex Romadinoff wrote:
>Dear all,
>
>I try to render volume data with the following code
>
>// :skipped:
>short* data=new short [1000000];
>
>  for (int i=0; i<1000000; i++){
>      data[i]=120+200*sin(i)*((i+1)%20);
>  }
>
>  vtkImageImport *img=vtkImageImport::New();
>
>  img->SetImportVoidPointer (data);
>  img->SetDataScalarTypeToShort ();
>  img->SetWholeExtent (0, 100, 0, 100, 0, 100);
>  img->SetDataExtentToWholeExtent ();
>// ..skipped..
>vtkVolumeRayCastMapper* volumeMapper=vtkVolumeRayCastMapper::New();
>volumeMapper->SetVolumeRayCastFunction (compositeFunction);
>volumeMapper->SetInput (img->GetOutput());
>// ..skipped
>
>When I use short or double type for data array and do
>SetDataScalarTypeTo{Short|Double} the resultant rendered image is empty.
>
>When I use unsigned char for data transition, volume is visualized well.
>
>What's up ?
>Is vtkVolumeRayCastMapper works only for unsigned char data ?

It will handle unsigned char or unsigned short data.
- Amy

>With best wishes,
>Alex
>
>
>
>
>
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