Re: rotation aadlport

[Andreas Owen <iaowen hta fhz ch>]

hi

i've succeded. i had to take out the roation function of the polygone.

> Andreas Owen wrote:
>
> > hi
> >
> > Lars Clausen wrote:
> >
> > > On Thu, 2006-11-16 at 18:29 +0100, Andreas Owen wrote:
> > >
> > > > Hi Lars
> > > >
> > > > sorry for not writing this to the mailing-list. i'm getting 
> > > > desparate because time is nearly up in school. so i thought i could 
> > > > mail you directly because i missed the 6 oclock maillist.
> > >
> > >
> > >
> > >
> > > The mailing list does not run on a fixed schedule, I guess you're just
> > > getting it as a daily digest rather than as-they-come.  If you're really
> > > in a hurry, getting mailing list mails as individual mails and then
> > > asking there is bound to be faster.
> > >
> > >
> > > > I was wondering how i could get the method draw_in_data_port() to 
> > > > draw a square instead of a triangle. i've succeeded in that but the 
> > > > rotation doesn't work.
> > > >
> > > > i allways thougt that you have to translate o object to 0/0 then 
> > > > rotate like in rotate_around_origin() and reverse the translation 
> > > > again.
> > >
> > >
> > >
> > >
> > > If you're only trying to do 90 degrees rotation, you can avoid the
> > > sin/cos relations entirely and just swap x/y and signs.  But I can't see
> > > what your angles can be.  I *think* your rotation function is correct.
> >
> >
> > sounds good but that give me 2 side changes, i need 1.
> > for examle:
> >     given: a square abcd (clockwies points of square)
> >     after rotation: dabc
> > thas a counter clockwise rotation (point moves one position in square).
> >
> > > > in the moment the port is only drawn when it's on the right side of 
> > > > the shape. if i change p[0] and p[1] in draw_in_data_port() i can 
> > > > get i running on diffrent sides of the shape:
> > > >     p[0].x = +
> > > >     p[0].y = +
> > > >     p[1].x = -
> > > >     p[1].y = -
> > > >         -> shows on left side
> > > >     p[0].x = +
> > > >     p[0].y = -
> > > >     p[1].x = -
> > > >     p[1].y = +
> > > >         -> shows on top side
> > > >     p[0].x = -
> > > >     p[0].y = +
> > > >     p[1].x = +
> > > >     p[1].y = -
> > > >         -> shows on buttom side
> > >
> > >
> > >
> > >
> > > So... what is your question?
> >
> >
> >
> > > Oh, a tip:  Long macros are a really bad idea.  Use functions liberally.
> >
> >
> > it's a give example that contains most of the functionality i need. my 
> > c-sqills are bad :-( so i'll not try and make a new lib.
> >
> > > -Lars
> > thanks andi