## Posted By

alexaivars on 08/13/09

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# Calculate Ellipse

/ Published in: ActionScript 3

`/*		* This functions returns an array containing 36 points to draw an		* ellipse.		*		* @param x {double} X coordinate		* @param y {double} Y coordinate		* @param a {double} Semimajor axis		* @param b {double} Semiminor axis		* @param angle {double} Angle of the ellipse		*/ 		private function calculateEllipse(x:Number, y:Number, a:Number, b:Number, angle:Number, steps:Number = 36 ):Array 		{			var points:Array = []; 			// Angle is given by Degree Value			var beta:Number = -angle * (Math.PI / 180); //(Math.PI/180) converts Degree Value into Radians			var sinbeta:Number = Math.sin(beta);			var cosbeta:Number = Math.cos(beta); 			for (var i:Number = 0; i < 360; i += 360 / steps) 			{				var alpha:Number = i * (Math.PI / 180) ;				var sinalpha:Number = Math.sin(alpha);				var cosalpha:Number = Math.cos(alpha); 				var X:Number = x + (a * cosalpha * cosbeta - b * sinalpha * sinbeta);				var Y:Number = y + (a * cosalpha * sinbeta + b * sinalpha * cosbeta); 				points.push(new Point(X, Y));			} 			return points;		}`