'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 Draw3DBall
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
Friend WithEvents Button3 As System.Windows.Forms.Button
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.Button3 = 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(528, 312)
Me.PictureBox1.TabIndex = 0
Me.PictureBox1.TabStop = False
'
'Button1
'
Me.Button1.Location = New System.Drawing.Point(24, 336)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(64, 32)
Me.Button1.TabIndex = 1
Me.Button1.Text = "Shape 1"
'
'Button2
'
Me.Button2.Location = New System.Drawing.Point(120, 336)
Me.Button2.Name = "Button2"
Me.Button2.Size = New System.Drawing.Size(64, 32)
Me.Button2.TabIndex = 2
Me.Button2.Text = "3D Curve"
'
'Button3
'
Me.Button3.Location = New System.Drawing.Point(232, 336)
Me.Button3.Name = "Button3"
Me.Button3.Size = New System.Drawing.Size(72, 32)
Me.Button3.TabIndex = 3
Me.Button3.Text = "Ball"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(528, 382)
Me.Controls.Add(Me.Button3)
Me.Controls.Add(Me.Button2)
Me.Controls.Add(Me.Button1)
Me.Controls.Add(Me.PictureBox1)
Me.ResumeLayout(False)
End Sub
Dim g As System.Drawing.Graphics
Dim pen1 As New System.Drawing.Pen(Color.Green, 0.5)
Const PI = 3.14159
Dim flag, col, r, h, hl, n, n1 As Short
Dim x, y, z, cx, cy, cz, thx, thy, thz As Single
Dim ed, od, eh As Short
Dim point1, point2, point3, point4, point5 As System.Drawing.Point
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim th As Single
Static ax(9), ay(9), az(9)
Static bx(9), by(9), bz(9)
h = 160 : thy = 0.2
col = 0 : n1 = 1
r = 100
n = 8
thx = 0.2
PictureBox1.Refresh()
ax(0) = h : ay(0) = h : az(0) = h
n1 = 1
For th = 0 To 2 * PI + 0.1 Step 2 * PI / n
x = r * Math.Cos(th) : y = -h : z = r * Math.Sin(th)
Call roty() : Call rotx()
bx(n1) = x : by(n1) = y : bz(n1) = z
n1 = n1 + 1
Next th
For n1 = 1 To n
x = ax(n1) : y = ay(n1)
Call linzuiti()
x = ax(n1 + 1) : y = ay(n1 + 1)
Call linzuiti()
x = bx(n1 + 1) : y = by(n1 + 1)
Call linzuiti()
x = bx(n1) : y = by(n1)
Call linzuiti()
Next n1
End Sub
Public Sub linzuiti()
Dim gx, gy As Single
gx = 250 + x
gy = 180 + y
If flag = 0 Then point1.X = gx : point1.Y = gy
flag = 1
point2.X = gx : point2.Y = gy
g = PictureBox1.CreateGraphics
g.DrawLine(pen1, point1, point2)
point1 = point2
End Sub
Private Sub rotx()
Dim yw, zw As Single
yw = y : zw = z
y = yw * Math.Cos(thx) - zw * Math.Sin(thx)
z = yw * Math.Sin(thx) + zw * Math.Cos(thx)
End Sub
Private Sub roty()
Dim zw, xw As Single
zw = z : xw = x
x = zw * Math.Cos(thy) - xw * Math.Sin(thy)
z = zw * Math.Sin(thy) + xw * Math.Cos(thy)
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 x, y, s, cx, cy, zz, xx, yy As Single
Dim h, a, b, sx, sx1, sx2, sy, sy1, sy2 As Integer
Dim x1, x2, y1, y2, xw, yw As Integer
s = pi / 16
x1 = -3
x2 = 3
xw = x2 - x1
y1 = -9 : y2 = 9 : yw = y2 - y1
sx1 = 140 : sx2 = 600
sy1 = 360 : sy2 = 100
cx = (sx2 - sx1) / xw
cy = (sy1 - sy2) / yw
h = 170 : a = 6 : b = 6
For y = y1 + 6 To y2 - 6 Step 1 / cy
For x = x1 To x2 Step 1 / cx * 2
zz = h * Math.Exp(-x * x / a * a - y * y / b * b)
xx = x * cx + sx1 + 160
yy = sy1 - y * cy
sx = Int(xx + y * cy * Math.Cos(s))
sy = yy - zz
sy = sy - 100
If x = -3 Then
point1.X = sx - 60 : point1.Y = sy - 20
Else : point2.X = sx - 60 : point2.Y = sy - 20
g.DrawLine(pen1, point1, point2)
point1 = point2
End If
Next x
Next y
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
PictureBox1.Refresh()
g = PictureBox1.CreateGraphics
Dim i, r As Integer
Dim x, y, z, s, q, p, px, py As Single
Dim mx(600), my(600) As Integer
s = pi / 4
r = 100
i = 1
q = -pi / 2 + 0.1
For p = 0 To 2 * pi Step 0.2
x = r * Math.Cos(q) * Math.Sin(p)
y = r * Math.Sin(q)
z = r * Math.Cos(q) * Math.Cos(p)
px = x * 1.2
py = y - z * Math.Sin(s)
mx(i) = px + 200
my(i) = 150 - py
i = i + 1
Next p
point1.X = mx(1) : point1.Y = my(1)
For q = -pi / 2 + 0.2 To pi / 2 Step 0.2
i = 1
For p = 0 To 2 * pi Step 0.2
x = r * Math.Cos(q) * Math.Sin(p)
y = r * Math.Sin(q)
z = r * Math.Cos(q) * Math.Cos(p)
px = x * 1.2
py = y - z * Math.Sin(s)
point2.X = px + 200 : point2.Y = 150 - py
g.DrawLine(pen1, point1, point2)
point1 = point2
point3.X = mx(i) : point3.Y = my(i)
point4.X = px + 200 : point4.Y = 150 - py
g.DrawLine(pen1, point3, point4)
point3 = point4
mx(i) = px + 200
my(i) = 150 - py
i = i + 1
Next p
p = 0
x = r * Math.Cos(q) * Math.Sin(p)
y = r * Math.Sin(q)
z = r * Math.Cos(q) * Math.Cos(p)
px = x * 1.2
py = y - z * Math.Sin(s)
point5.X = px + 200 : point5.Y = 150 - py
g.DrawLine(pen1, point4, point5)
point4 = point5
Next q
End Sub
End Class