求C#绘制平滑曲线 把 (1,1) , (2,5), (4,3) (7,8) 联接起来

Question

求绘制平滑曲线 把 (1,1) , (2,5), (4,3) (7,8) 联接起来

Answer 1

using System.Drawing;
using System.Windows.Forms;namespace ImagePro
{
    public partial class DrawLineFrm : Form
    {
        public DrawLineFrm()
        {
            InitializeComponent();
        }        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            Point[] points = {new Point(1, 1), new Point(2, 5), new Point(4, 3), new Point(7, 8)};
            using (Graphics g = CreateGraphics())
            {
                using (Pen p = new Pen(Color.Black))
                {
                    g.DrawLines(p, points);
                }
            }
        }
    }
}可以

Answer 2

用贝兹曲线
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = this.CreateGraphics();
            g.DrawBeziers(new Pen(new SolidBrush(Color.Red)),
                new Point[] { new Point(10, 10), new Point(20, 50), new Point(40, 30), new Point(70, 80) });
            g.Dispose();
        }

Answer 3

DrawLines画的是折线图，用贝赛尔曲线绘制的比较平滑的曲线。Graphics g = this.CreateGraphics();
            g.DrawBeziers(new Pen(new SolidBrush(Color.Red)),
                new Point[] { new Point(10, 10), new Point(20, 50), new Point(40, 30), new Point(70, 80) });
            g.Dispose();是可以的。

Answer 4

用样条曲线：
Point pt1 = new Point(50,50);
Point pt2 = new Point(150, 40);
Point pt3 = new Point(100, 10);
Point pt4= new Point(40, 120);
Point pt5 = new Point(160, 130);
//绘制样条曲线经过pt1,pt2,pt3,pt4,pt5;
g.DrawCurve(bluePen, new Point[] { pt1, pt2, pt3, pt4,pt5 });