Path: utzoo!attcan!uunet!mcsun!ukc!axion!galadriel!marks
From: marks@galadriel.bt.co.uk (Mark Shackleton RT4341)
Newsgroups: comp.graphics
Subject: How to draw rotated parabola???
Message-ID: <1990Jul11.083653.21326@galadriel.bt.co.uk>
Date: 11 Jul 90 08:36:53 GMT
Organization: RT611 BTRL, Martlesham Heath, Ipswich, UK
Lines: 12

Does anyone know an incremental algorithm for drawing parabolas rotated
by an arbitrary angle theta about the origin? I have in mind a scheme
a la Bresenham which avoids redrawing pels and costly calculations.
In case it helps, my parab. is given by 'y=a*(1 - x^2/b^2)' + rotation.

Any general pseudo-code or even better 'C' code would be much appreciated,
otherwise references to appropriate algorithms would be the next best
thing.

Thanks in aticipation, Mark.

Email: marks@galadriel.bt.co.uk (just hit the reply button - it works better)