[vtkusers] How to access sequentially pointers of vtkPoints data (coordinates) ?

[Michael Jackson]

You might want to try:

double* data = (double*)(points->GetData()->GetVoidPointer(0));

This will give you the raw pointer to the start of the array. It is up  
to you to now create a proper index into that array in order to work  
with the data.

_________________________________________________________
Mike Jackson                  mike.jackson at bluequartz.net
BlueQuartz Software                    www.bluequartz.net
Principal Software Engineer                  Dayton, Ohio



On Jan 17, 2009, at 7:54 AM, pof wrote:

> Hello,
>
> I need to access (for further use outside of vtk frame) the pointers  
> that hold the points data of of vtkPoints set.
> So I try using vtkPoints::GetPoint(int id) that is supposed to  
> return the pointer I am looking for.
>
> The problem is that I got something wrong at execution :
> - if I call GetPoint(Id0) only once for a given Id, this is ok
> - but then if I call GetPoint(Id1) a second time (or more) for  
> another Id,  all the stored pointers are the same and point to coord  
> vector of the last accessed point.
> Here below is a small code that reproduce the problem.
>
> I'm obviously missing something but can't figure out what!
> Does anybody has got an idea on the mistake I'm doing?
>
> Thanks
> JD
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