Re: [Toon-members] Efficient (dynamic) slicing

[Rafael Spring]

> Ok, so the real situation is that fillSubMatrix() is virtual  
> (sorry, should have mentioned that in my first mail). That would  
> probably require to be explicit about the template parameters, right?
> Can I now assume that the proposed pattern would not result in  
> temp. matrix data being allocated from the heap? Or is there a  
> better practice than this?

> I am also a little confused by the Matrix documentation. For the  
> slice() method there is an example:
>
> Matrix<> m(3,3);
> // Extract the top-left 2x2 matrix
> Matrix<2> b = m.slice(0,0,2,2);
>
> Is Matrix b now a copy of m's top left 2x2 or is b just referencing  
> this data? Would then the following be a reference?
>
> Matrix<Dynamic, Dynamic, double, TooN::Internal::Slice<-1,1> > b =  
> m.slice(0,0,2,2);

Please ignore the questions. The debugger just gave me all the answers.
However, for the next beta of TooN, I'd love to have a small memory  
manager in the background to redirect the temp. allocations.

Rafael


> > -Ed
> >
> > --
> > (You can't go wrong with psycho-rats.)(http://mi.eng.cam.ac.uk/ 
> > ~er258)
> >
> > /d{def}def/f{/Times s selectfont}d/s{11}d/r{roll}d f 2/m{moveto}d -1
> > r 230 350 m 0 1 179{ 1 index show 88 rotate 4 mul 0 rmoveto}for/s 12
> >     d f pop 235 420 translate 0 0 moveto 1 2 scale show showpage
>
>
>
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