Re: Rotating 45?/90? (sorry, my bad with the subject line before)

[James McDonald <james jamesmcdonald id au>]

Lars Clausen wrote:
> On Wed, 2007-04-18 at 21:32 +0200, Joachim Otahal wrote:
>   
> > 2nd try, this time correct subject line.....
> >
> > dia-list-request gnome org schrieb:
> > From: "Lars Clausen" <lars raeder dk>
> >
> > Subject: Re: Rotating 45?/90?
> >
> >     
> > > It's not a problem in the underlying rendering libraries, and hasn't been
> > > for a while.  It's a problem of integrating it in Dia:<vut>
> > >
> > > -Lars
> > >       
> > I know this reason already, my older question is still somewhere in the 
> > DIA list I suppose. Would modifying (hacking ?) the 
> > Obiject-to-be-rotated to be it's turned representative work? Do not 
> > store the object rotation, store the rotated object and the renderer 
> > doesn't have to be changed (I know, supposed-to-be-ugly style).
> > 45 is probably impossible without side effects since doing 8*45 turn 
> > doesn't mean we are back at the way the original object was (rounding 
> > problem), but 4*90 gives you back the original. And IF turning, don't 
> > forget the connector points the lines go to, I tend to give all holes of 
> > a networkswitch it's own connector point when doing my own objects.
> >     
>
> I'm sorry, but I have no idea what you're suggesting.  My thoughts run
> towards storing rotation (or even a full affine transformation matrix)
> with each object and let them cache rotated values of their points.
>
> -Lars
>   
Inkscape seems to have this ability... IANAP but maybe emulate what they 
have done with their objects. CASE(copy and steal everything) 
programming method would apply here:)