[vtkusers] memory allocation fail for MarchingCubes

[John Drescher]

> I am a newbie of VTK. Now I need to build 3d model which can be saved as STL
> file from DICOM files. I google it and find some guys mentions that
> MarchingCubes. So I try to load a DICOM series(515K one file, totally 676
> files, around 340M) with the sample code at
> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Modelling/MarchingCubes. Even I set
> the isoValue of vtkMarchingCubes to 1, when the application memory increase
> to around 1.07G, then get a memory bad_alloc exception.
>
> What happen with it? What should I fix this problem?
>

Switch to using 64 bit vtk.

John