Re: [ublas] Vector of size 3 without the size element

From: Langeland, Stian (GE Healthcare) (Stian.Langeland_at_[hidden])
Date: 2007-05-29 04:19:09

Thanks for such a quick reply. I have considered the c_vector but when I
looked in vector.hpp I see that it has a member size_
....
    private:
        size_type size_;
        array_type data_;
.... 
I guess this will still come in-between the floats?

Stian

> -----Original Message-----
> From: ublas-bounces_at_[hidden] 
> [mailto:ublas-bounces_at_[hidden]] On Behalf Of Dima Sorkin
> Sent: 29. mai 2007 10:11
> To: ublas mailing list
> Subject: Re: [ublas] Vector of size 3 without the size element
> 
> Hi.
>  It can be c_vector, from
> http://www.boost.org/libs/numeric/ublas/doc/types_overview.htm
> 
> I don't sure that if you put an array of c_vector, then all
> floating numbers will sit continuously in memory (compiler 
> can add some
> spaces).
> 
> May be a 3xN matrix fits your needs ?
> 
> Regards,
>  Dima.
> 
> Quoting "Langeland, Stian (GE Healthcare)" <Stian.Langeland_at_[hidden]>:
> 
> > Hi,
> > 
> > I have been trying to create a vector of 3 elements (a 
> point) without
> > the size element stored in the object. The reason for this is that I
> > need to be able to have all the elements consecutive in memory when
> > gathering several points in a std::vector. In this way all 
> points in the
> > std::vector can be uploaded to a graphics card using a 
> single memcopy.
> > Can this be acheived using ublas? I have not been able to 
> find a way.
> > 
> > Thanks,
> > Stian
> > _______________________________________________
> > ublas mailing list
> > ublas_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/ublas
> > 
> 
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