'Visual Basic.Net JingCai Programming 100 Examples
'Author: Yong Zhang
'Publisher: Water Publisher China
'ISBN: 750841156
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawHexagon
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
Friend WithEvents Button2 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.Button2 = 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(504, 304)
Me.PictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.AutoSize
Me.PictureBox1.TabIndex = 0
Me.PictureBox1.TabStop = False
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(160, 320)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(80, 32)
Me.Button1.TabIndex = 1
Me.Button1.Text = "Hexagon"
'
'Button2
'
Me.Button2.Location = New System.Drawing.Point(296, 320)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(80, 32)
Me.Button2.TabIndex = 2
Me.Button2.Text = "Circle"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(504, 366)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.PictureBox1)
Me.ResumeLayout(False)
End Sub
Dim pen1 As New System.Drawing.Pen(Color.Green, 0.4)
Dim g As System.Drawing.Graphics
Const Max = 20
Const pi = 3.1415926
Dim dx(Max), dy(Max) As Double
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
g = PictureBox1.CreateGraphics
PictureBox1.Refresh()
Dim i As Integer
Dim s, r As Double
i = 6
s = 80
r = 0.34
setdate(6)
snow(200.0#, 180.0#, 6, i, s, r)
End Sub
Private Sub Sixth(ByVal x, ByVal y, ByVal n, ByVal s)
Dim i, j, x1, x2, y1, y2 As Integer
For i = 0 To n
If i = n Then
j = 1
Else
j = i + 1
End If
x1 = Int(x + dx(i) * s) - 50
y1 = Int(y + dy(i) * s) - 55
x2 = Int(x + dx(j) * s) - 50
y2 = Int(y + dy(j) * s) - 55
g.DrawLine(pen1, x1, y1, x2, y2)
Next
End Sub
Private Sub snow(ByVal x, ByVal y, ByVal n, ByVal i, ByVal s, ByVal r)
Dim t, t1 As Integer
Dim xx, yy, s1 As Double
If i > 0 Then
For t = 0 To n
xx = x + dx(t) * s
yy = y + dy(t) * s
t1 = i - 1
s1 = s * r
snow(xx, yy, n, t1, s1, r)
Next
End If
Sixth(x, y, n, s)
End Sub
Private Sub setdate(ByVal n)
Dim i As Integer
Dim theta As Double
dx(i) = 0.0#
dy(i) = 0.0#
theta = 2.0# * pi / n
For i = 1 To n
dx(i) = Math.Sin(i * theta)
dy(i) = Math.Cos(i * theta)
Next
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
PictureBox1.Refresh()
g = PictureBox1.CreateGraphics
Dim n, i As Integer
Dim r, r1, c As Single
Dim p As Double = 0.8
Dim f As Double = 0.2
c = 40.0#
n = 6
r1 = 0.5 * 1000 * (1 - f) / (1 - p)
r = r1 / c
g.DrawEllipse(pen1, 200 - r, 150 - r, 2 * r, 2 * r)
circle(200, 150, r, n + 1)
End Sub
Private Sub circle(ByVal x, ByVal y, ByVal r, ByVal n)
Dim tcos(100), tsin(100) As Single
Dim i, ns As Integer
Dim theta As Double
Dim f As Single = 0.3!
Dim c As Double = 2
ns = 10
theta = 2 * pi / ns
Dim n1, f1 As Single
n1 = n - 1
f1 = f * r
If n1 > 1 Then
For i = 1 To ns
tcos(i) = c * Math.Cos(i * theta)
tsin(i) = c * Math.Sin(i * theta)
g.DrawEllipse(pen1, x + r * tcos(i) - f1, y + r * tsin(i) - f1, 2 * f1, 2 * f1)
circle(x + r * tcos(i), y + r * tsin(i), f1, n1)
Next
End If
End Sub
End Class
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