VB.Net/2D/Star

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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
  1. 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
  1. 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>