[Numpy-discussion] numpy, swig and TNT-Arrays

Rolf Wester rolf.wester@ilt.fraunhofer...
Tue Nov 11 03:19:26 CST 2008


Charles R Harris wrote:
> On Tue, Nov 11, 2008 at 1:24 AM, Rolf Wester
> <rolf.wester@ilt.fraunhofer.de>wrote:
> 
>> Hi all,
>>
>> I would like to wrap some C++ classes that use TNT-Arrays. Is it
>> possible to pass numpy arrays to C++ functions that expect TNT-Arrays as
>> function parameter? Does anybody know how the wrappers could be
>> generated using swig? I would be very appreciative for any help.
>>
>> With kind regards
>>
> 
> IIRC, TNT does vectors and matrices, they have constructors, and they are
> contiguous. I think you can make wrappers, but it isn't going to be anything
> straight forward unless you can reuse the memory from a numpy array and I
> don't recall that that sort of constructor is available.
> 
> Is TNT still active? It looked pretty dead last time I looked several years
> ago.
> 
> Chuck
> 
> 
> 
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TNT has constructors like:

TNT::Array1D<double>(int n, double * data)

which do not allocate a new C-array but that use "data" as their data-array.

I'm not sure whether TNT is still actively maintained, the TNT home page
was last modified in 2004, so you are probably right. But the TNT Arrays
are just what I need and I know of no alternative.

Rolf
-- 
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# Dr. Rolf Wester
# Fraunhofer Institut f. Lasertechnik
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