"Konrad R." <krotuski@_no_s.p.am_mion.elka.pw.edu.pl> wrote in message
news:06df01c35506$fd283020$a401280a@phx.gbl...
> Hi
>
> I want to draw piechart, and have to compute regions that
> FillPie function fills (i have to have coordinates of that
> regions, not only fill them)
>
> once i am using square as a bounding box all works ok, but
> when i switch to ellipse (to draw 3D mode pie chart), it
> is a bit strange, please have a look :
>
> http://knr.budowlana.pl/~krotuski/msdn/FlatPie.bmp
> http://knr.budowlana.pl/~krotuski/msdn/3DPie.bmp
>
> at first picture (Flat), angle at which green region
> starts is less than 45, and on the second one (3D) it
> starts at more than 45
>
> those regions are drawn in the same line of code, only
> bounding rectangle changes (once it is square, another
> time it is rectangle), so i am rather not doing something
> wrong
>
> my question is :
>
> how should i calculate coordinates of regions when
> piechart is drawn in rectangle (as ellipse) to be
> correct ??
>
> thanks in advance