Path: utzoo!attcan!uunet!mcvax!ukc!stc!datlog!torch!paul
From: paul@torch.UUCP (Paul Andrews)
Newsgroups: comp.windows.x
Subject: Re^2: Sloooow Arcs and Ellipses in X11R3 on Sun3
Message-ID: <219@torch.UUCP>
Date: 19 Dec 88 14:56:53 GMT
References: <198@poseidon.UUCP> <8811240256.AA24647@EXPO.LCS.MIT.EDU>
Organization: TORCH Computers Ltd., Cambridge, England
Lines: 13

keith@EXPO.LCS.MIT.EDU (Keith Packard) writes:


>....  The boundaries of the arc are
>defined by the set of points line_width/2 along a normal to the elipse
>from the elipse.  The solution seems an easy one, simply compute an
>equation which describes the boundary, and solve for x in terms of y.
>...

Why can't you use an elliptical DDA for this? Drive two DDA's. one describing
the outer boundary, one the inner and fill the spans between them?

- Paul.