[gameprogrammer] Re: c++ template problem

Something I've seen done which hasn't been mentioned yet is partial
template specialization
( http://www.cprogramming.com/tutorial/template_specialization.html ) on
the dimension (N) of Vector<N, T>.  It's a good bit of typing initially
(because you won't be using inheritance) but you get a nice, single
interface for all your vector classes; Vector<2, T> and Vector<3, T>'s
can be optimized to your heart's content; and you can add
dimension-specific things like the cross product to Vector<3, T>.  And,
if you need it, you can still create 25-dimensional vectors for whatever
else you might want.

On Sun, 2009-07-19 at 16:18 +0200, Felde Norbert wrote:
> Thanks.
> The problem was that the va_list dous not handle float type.
> I need to get the parameter as double and than convert it to float which 
> makes it difficult to implement it as template.
> 
> I could not find out yet the problem of the derived vect3 class.
> 
> fenor
> 
> 
> 
> 
> Matthew Weigel írta:
> > Felde Norbert wrote:
> >
> >
> >   
> >> The c'tor should get the values of the coordinates, but because of the
> >> template parameter N, I do not know
> >> how many parameter the c'tor should get. I tried that:
> >>
> >>    Vect<T,N>(T v0, T v1, ...) {
> >>        va_list params;
> >>
> >>        V[0] = v0;
> >>        V[1] = v1;
> >>     
> >
> > Other people report having success with this kind of code online, e.g.
> > http://groups.google.com/group/microsoft.public.vc.language/browse_thread/thread/25e1820b7f894bde
> >
> > As a starting point, why don't you try building and running the code
> > from that link (without the reference in the constructor) and see if you
> > have any problems.
> >   
> 
> 
> ---------------------
> To unsubscribe go to http://gameprogrammer.com/mailinglist.html
> 
> 


---------------------
To unsubscribe go to http://gameprogrammer.com/mailinglist.html

Other related posts: