Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawLineShape2
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
Public Sub New()
MyBase.New()
InitializeComponent()
End Sub
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
Private components As System.ComponentModel.IContainer
Friend WithEvents PictureBox1 As System.Windows.Forms.PictureBox
Friend WithEvents Button1 As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.PictureBox1 = New System.Windows.Forms.PictureBox
Me.Button1 = New System.Windows.Forms.Button
Me.SuspendLayout()
'
'PictureBox1
'
Me.PictureBox1.BackColor = System.Drawing.SystemColors.Window
Me.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.PictureBox1.Dock = System.Windows.Forms.DockStyle.Top
Me.PictureBox1.Location = New System.Drawing.Point(0, 0)
Me.PictureBox1.Name = "PictureBox1"
Me.PictureBox1.Size = New System.Drawing.Size(488, 352)
Me.PictureBox1.TabIndex = 0
Me.PictureBox1.TabStop = False
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(8, 376)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(80, 24)
Me.Button1.TabIndex = 1
Me.Button1.Text = "Draw"
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(488, 430)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.PictureBox1)
Me.ResumeLayout(False)
End Sub
Dim pen1 As New System.Drawing.Pen(Color.Green, 1)
Dim g As System.Drawing.Graphics
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
g = PictureBox1.CreateGraphics
PictureBox1.Refresh()
Dim x1, x2, y1, y2, r As Long
Dim x As Single
Dim y, z As Double
Const pi = 3.1415926
r = 60
For x = 0 To 2 * pi Step pi / 360
y = r * (1 + 1 / 4 * Math.Cos(20 * x))
z = y * (1 + Math.Sin(4 * x))
x1 = 200 + Int(z * Math.Cos(x))
y1 = 180 + Int(z * Math.Sin(x))
x2 = 200 + Int(z * Math.Cos(x + pi / 5))
y2 = 180 + Int(z * Math.Sin(x + pi / 5))
g.DrawLine(pen1, x1, y1, x2, y2)
Next
End Sub
End Class
