C#之画sin曲线
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace sin{ public partial class Form1 : Form { private const int ADD_HIGHT = 300; private const int ADD_LEFT = 0; private const int ADD_MUTIPLY = 50; public Form1() { InitializeComponent(); } private void OnPaint(object sender, PaintEventArgs e) { Graphics g = e.Graphics; Pen pen = new Pen(Color.Purple); Point pt1 = new Point(0, 0); Point pt2 = new Point(0, 0); int i = 0; Random rand = new Random(10); int nRand = rand.Next() % ADD_HIGHT; pt1.X = ADD_LEFT; pt1.Y = Convert.ToInt32(ADD_HIGHT + ADD_MUTIPLY * Math.Sin(Math.PI / 180 * (i+nRand))); g.DrawLine(new Pen(Color.Red), 0, ADD_HIGHT, 1200, ADD_HIGHT); for (i = 0; i < 314*4; i++ ) { pt2.X = ADD_LEFT + i;//加上一个随机数 pt2.Y = Convert.ToInt32(ADD_HIGHT + ADD_MUTIPLY * Math.Sin(Math.PI / 180 * (i + nRand))); g.DrawLine(pen, pt1, pt2); pt1 = pt2; } } private void OnLoad(object sender, EventArgs e) { this.WindowState = FormWindowState.Maximized; } }}
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