Re: [TCLCORE] Easy of use of Canvas shapes (was TIP 415)

[Joe E. <jen...@fl...>]

Andreas Leitgeb wrote:
>
> Also, there is currently no primitive for a tilted ellipses.
> Tilted rectangles can at least be construed as polygons, but
> how would one draw tilted ellipses?
>
> Or is this just a limitation of the native graphics primitives
> from the OS (or X11)?

It's an X11 limitation.  (This functionality was left out
of X11, it turns out, because of uncertainty concerning
patents -- see <URL: http://lwn.net/Articles/354408/ >)

If I remember correctly, non-axis-aligned ellipses can be
drawn with reasonably high accuracy using splines.


--Joe English