WPF 心形线算法

今天在网上查找下心形算法公式，自己便按照公式写下来标记在博客，主要是方便以后查看！

        private int maxStep = 520;

        private double radius;

        private double centerPt;

        private void CreateHeartLine()

        {

          /*RootCvs是Canvas控件*/

            centerPt = RootCvs.Width / 2;

            radius = RootCvs.Width / 6;

            for (int i = 0; i < maxStep; i++)

            {

                var rect = new Rectangle

                {

                    Height = 5,

                    Width = 5,

                    Fill = Brushes.Red

                };

                double angle = 2 * Math.PI / maxStep * i;

                double r = 2 * radius * (1 - Math.Sin(angle));

                //圆形心

                //double x = centerPt + radius * (2 * Math.Cos(angle) - Math.Cos(2 * angle));

                //double y = centerPt + radius * (2 * Math.Sin(angle) - Math.Sin(2 * angle));

                //桃形心

                double x = centerPt + 16 * (Math.Sin(angle) * Math.Sin(angle) * Math.Sin(angle)) * 10;//

                double y = centerPt + (13 * Math.Cos(angle) - 5 * Math.Cos(2 * angle) - 2 * Math.Cos(3 * angle) - Math.Cos(4 * angle)) * 10;//

                Canvas.SetLeft(rect, x);

                Canvas.SetTop(rect, y);

                RootCvs.Children.Add(rect);

            }

        }