VB.Net/2D/Star
Fill a star shape
<source lang="vbnet"> Imports System.Drawing.Drawing2D Imports System Imports System.Drawing.Text Imports System.Drawing Imports System.Windows.Forms Imports System.Math Public Class MainClass
Shared Sub Main() Dim form1 As Form = New Form1() Application.Run(form1) End Sub
End Class
Public Class Form1
Private Sub Form1_Paint(ByVal sender As Object, _ ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint Dim x As Integer = 10 Dim y As Integer = 10 Dim wid As Integer = 150 Dim hgt As Integer = 150 " Fill a star shape. Dim cx As Integer = x + wid \ 2 Dim cy As Integer = y + hgt \ 2 Dim r1 As Integer = CInt(wid * 0.5) Dim r2 As Integer = CInt(hgt * 0.25) Dim star_pts(9) As Point For i As Integer = 0 To 9 Step 2 star_pts(i).X = cx + CInt(r1 * Cos(i * PI / 5 - PI / 2)) star_pts(i).Y = cy + CInt(r1 * Sin(i * PI / 5 - PI / 2)) star_pts(i + 1).X = cx + CInt(r2 * Cos((i + 1) * PI / 5 - PI / 2)) star_pts(i + 1).Y = cy + CInt(r2 * Sin((i + 1) * PI / 5 - PI / 2)) Next i Dim star_path As New GraphicsPath star_path.AddPolygon(star_pts) Dim star_brush As New PathGradientBrush(star_pts) star_brush.CenterColor = Color.Black star_brush.SurroundColors = New Color() { _ Color.Black, Color.White, _ Color.Black, Color.White, _ Color.Black, Color.White, _ Color.Black, Color.White, _ Color.Black, Color.White _ } e.Graphics.FillPolygon(star_brush, star_pts) End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.IContainer "NOTE: The following procedure is required by the Windows Form Designer "It can be modified using the Windows Form Designer. "Do not modify it using the code editor. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.SuspendLayout() " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(200, 200) Me.Name = "Form1" Me.Text = "" Me.ResumeLayout(False) End Sub
End Class
</source>
GraphicsPath: Draw Star
<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Drawing.Text Public Class MainClass
Shared Sub Main() Dim myform As Form = New FrmDrawShapes() Application.Run(myform) End Sub " Main
End Class
Public Class FrmDrawShapes
Inherits System.Windows.Forms.Form
- Region " Windows Form Designer generated code "
Public Sub New() MyBase.New() "This call is required by the Windows Form Designer. InitializeComponent() "Add any initialization after the InitializeComponent() call End Sub "Form overrides dispose to clean up the component list. 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 "Required by the Windows Form Designer Private components As System.ruponentModel.Container "NOTE: The following procedure is required by the Windows Form Designer "It can be modified using the Windows Form Designer. "Do not modify it using the code editor. <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() " "frmDrawShapes " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(520, 197) Me.Name = "frmDrawShapes" Me.Text = "Drawing Shapes" End Sub
- End Region
" draw various shapes on form Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) Dim graphicsObject As Graphics = e.Graphics Dim i As Integer Dim random As Random = New Random() Dim brush As SolidBrush = _ New SolidBrush(Color.DarkMagenta) " x and y points of the path Dim xPoints As Integer() = _ {55, 67, 109, 73, 83, 55, 27, 37, 1, 43} Dim yPoints As Integer() = _ {0, 36, 36, 54, 96, 72, 96, 54, 36, 36} " create graphics path for star Dim star As GraphicsPath = New GraphicsPath() " translate the origin to (150, 150) graphicsObject.TranslateTransform(150, 150) " create star from series of points For i = 0 To 8 Step 2 star.AddLine(xPoints(i), yPoints(i), _ xPoints(i + 1), yPoints(i + 1)) Next " close the shape star.CloseFigure() graphicsObject.FillPath(brush, star) End Sub " OnPaint
End Class
</source>