Question

c#做一个类似心电图效果的程序，从左往右100ms描一个点，连线，就像用笔在画线一样，到达一定宽度

c#做一个类似心电图效果的程序，从左往右100ms描一个点，连线，就像用笔在画线一样，到达一定宽度，再从头画，这时每描一个点，就先擦出这一列的点。

Answer 1

//说明，最好将pictureBox_board的背景色设置为黑色，timer1时间间隔设为100ms
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

namespace heartBeat
{
    public partial class Form1 : Form
    {
        int i = 0;
        int y0 = 0;                //上一个Y
        static int Xinterval = 10;    //水平间隔10像素
        static int Horizontal = 50;  //水平方向总点数50
        static int Vertical = 100;   //垂直200像素
        struct line
        {
            int x1, y1, x2, y2;
            public void Move(int x1, int y1, int x2, int y2)
            {
                this.x1 = x1;
                this.y1 = y1;
                this.x2 = x2;
                this.y2 = y2;
            }
            public void paint(Graphics g)
            {
                g.DrawLine(Pens.Yellow, x1, y1, x2, y2);
                g.SmoothingMode = SmoothingMode.AntiAlias;
            }
        }
        struct point
        {
            public int x, y;
            public void Move(int x, int y)
            {

                this.x = x;
                this.y = y;
            }
            public void paint(Graphics g)
            {
                g.DrawEllipse(Pens.Red, x - 1, y - 1, 3, 3);
                g.SmoothingMode = SmoothingMode.AntiAlias;
            }
        }
        line[] l = new line[Horizontal];
        point p = new point();
        public Form1()
        {
            InitializeComponent();
        }
        Random r = new Random();
        private void timer1_Tick(object sender, EventArgs e)
        {
            draw(r.Next(Vertical));
        }
        void draw(int y)
        {
            int ii = i % Horizontal;
            y += 50;
            l[ii].Move(ii * Xinterval, y0, (ii + 1) * Xinterval, y);
            p.Move((ii + 1) * Xinterval, y);
            textBox_points.Text += p.x.ToString() + "  , " + p.y.ToString() + Environment.NewLine;
            i++;
            pictureBox_board.Invalidate();
            y0 = y;
        }

        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            base.OnPaint(e);
            for (int i = 0; i < Horizontal; i++)
            {
                l[i].paint(e.Graphics);
            }
            p.paint(e.Graphics);
        }
    }
}

Answer 2

闲得无聊，做了一个