[vtkusers] VTK 7.1 vtkDataArray changes, current best way to copy vtkPolyData data?

[David Lonie]

If you just want to dump the data from any vtkDataArray into a memory
buffer using AOS ordering (e.g. typical VTK memory layout with
coherent tuples), something like:

vtkDataArray *array = ...;
int bufSize = array->GetNumberOfValues() * array->GetDataTypeSize();
void *buffer = malloc(bufSize);
array->ExportToVoidPointer(buffer);

will be the most efficient way to do this.

HTH,
Dave

On Thu, Jun 8, 2017 at 12:14 PM, Sean McBride <sean at rogue-research.com> wrote:
> Hi all,
>
> Since the vtkDataArray changes in VTK 7.1, what is the current best/fastest way to extract the points, strips, and normals from a vtkPolyData into another memory buffer?
>
> I'm always working with the same kind of data, so I'm hoping to preflight the sizes/types and then basically memcpy() the data out.
>
> Thanks,
>
> --
> ____________________________________________________________
> Sean McBride, B. Eng                 sean at rogue-research.com
> Rogue Research                        www.rogue-research.com
> Mac Software Developer              Montréal, Québec, Canada
>
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