marks@galadriel.bt.co.uk (Mark Shackleton RT4341) (07/11/90)
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)