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From: frank@cavebbs.gen.nz (Frank van der Hulst)
Newsgroups: comp.graphics,comp.sys.ibm.pc.misc
Subject: General Ellipse-arc drawing algorithm
Keywords: Curve ellipse arc
Message-ID: <1991Jan23.095200.17536@cavebbs.gen.nz>
Date: 23 Jan 91 09:52:00 GMT
References: <
Organization: The Cave MegaBBS, Public Access Usenet, Wellington, NZ
Lines: 12

I'm looking for a generalised ellipse-drawing routine, perhaps similar to
Bresenham's circle-drawing algorithm. However, I also want to be able to
draw only parts of an ellipse.

Currently, I'm doing it via the x^2/a^2 + y^2/b^2 = 1 formula, and calculating
the angle between the x-axis and the line to the point being generated to
ensure the line is within range. However, all the FP maths is slowing down the
drawing considerably.
o
-- 

Take a walk on the wild side, and I don't mean the Milford Track.