Equation for an EllipseDate: 10/27/95 at 16:44:28 From: Anonymous Subject: Ellipse X,Y coordinates Hi, I am trying to create objects along a ellipse. I have the center of the ellipse x,y coordinates, the lengths of both major and minor radii, and the number of degrees up from the x axis. I am looking for an equation where x1,y1 is the point on the ellipse to add my object. X1= ? Y1= ? I found the right formula for a circle but can't find it for an ellipse. If you could point me where to look or provide the equations I would be very grateful. Thanks Bob Jensen Date: 11/19/95 at 16:35:18 From: Doctor Josh Subject: Re: Ellipse X,Y coordinates Dear Bob, The general equation for an ellipse is: (x^2)/a^2 + (y^2)/b^2 = 1 where a is the major axis, b is the minor axis (a > b > 0), the major axis is along the x axis, and the center of the ellipse is at the origin. A good introduction to ellipses can be found in David M. Bressoud's book _Second Year Calculus_, published by Springer-Verlag. -Doctor Josh, The Geometry Forum |
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