VB.Net/2D/Bezier

Beziers Curve Demo

<source lang="vbnet"> Imports System Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Resources Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Imaging Imports System.Diagnostics Public Class MainClass

   Shared Sub Main()
       Dim myform As Form = New BeziersForm()
       Application.Run(myform)
   End Sub

End Class Public Class BeziersForm

   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.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()
       components = New System.ruponentModel.Container()
       Me.Text = "BeziersForm"
   End Sub

1. End Region

   Private Sub ClosedCurves_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim x As Integer = 0
       Dim y As Integer = 0
       Dim width As Integer = Me.ClientRectangle.Width / 3
       Dim height As Integer = Me.ClientRectangle.Height
       Dim blackBrush As Brush = Brushes.Black
       Dim fillBrush As Brush = Brushes.Gray
       Dim whitePen As Pen = Pens.White
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Center
       format.LineAlignment = StringAlignment.Center
       Dim pen As Pen = New Pen(Color.Black, 4)
       Dim pointPen As Pen = New Pen(Color.Blue, 3)
       pointPen.StartCap = pointPen.EndCap = LineCap.SquareAnchor
       Dim points As PointF() = New PointF() {New PointF(x + 25, y + height - 25), New PointF(x + width - 25, y + height - 25), New PointF(x + 25, y + 25), New PointF(x + width - 25, y + 25)}
       g.DrawRectangle(Pens.Black, x, y, width, height)
       g.DrawBeziers(pen, points)
       Dim point As PointF
       For Each point In points
           g.DrawLine(pointPen, New Point(point.X, point.Y), New Point(point.X + 1, point.Y))
       Next
       Dim i As Integer
       For i = 0 To points.Length - 1
           g.DrawString(i.ToString(), Me.Font, blackBrush, points(i))
       Next
       x = IIf(x > Me.ClientRectangle.Width - 2 * width, 0, x + width)
       y = IIf(x = 0, y + height, y)
       points = New PointF() {New PointF(x + 25, y + 25), New PointF(x + width - 25, y + 25), New PointF(x + width - 25, y + height - 25), New PointF(x + 25, y + height - 25)}
       g.DrawRectangle(Pens.Black, x, y, width, height)
       g.DrawBeziers(pen, points)
       For Each point In points
           g.DrawLine(pointPen, New Point(point.X, point.Y), New Point(point.X + 1, point.Y))
       Next
       For i = 0 To points.Length - 1
           g.DrawString(i.ToString(), Me.Font, blackBrush, points(i))
       Next
       x = IIf(x > Me.ClientRectangle.Width - 2 * width, 0, x + width)
       y = IIf(x = 0, y + height, y)
       points = New PointF() {New PointF(x + 25, y + 25), New PointF(x + width - 25, y + 25), New PointF(x + 25, y + height - 25), New PointF(x + width - 25, y + height - 25)}
       g.DrawRectangle(Pens.Black, x, y, width, height)
       g.DrawBeziers(pen, points)
       For Each point In points
           g.DrawLine(pointPen, New Point(point.X, point.Y), New Point(point.X + 1, point.Y))
       Next
       For i = 0 To points.Length - 1
           g.DrawString(i.ToString(), Me.Font, blackBrush, points(i))
       Next
       x = IIf(x > Me.ClientRectangle.Width - 2 * width, 0, x + width)
       y = IIf(x = 0, y + height, y)
   End Sub

End Class

      </source>

Closed Bezier Path Demo

<source lang="vbnet"> Imports System Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Resources Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Drawing.Imaging Public Class MainClass

   Shared Sub Main()
       Dim myform As Form = New Form1()
       Application.Run(myform)
   End Sub

End Class Public Class Form1

   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
       Me.SetStyle(ControlStyles.ResizeRedraw, True)
       Me.SetStyle(ControlStyles.DoubleBuffer, True)
       Me.SetStyle(ControlStyles.AllPaintingInWmPaint, True)
   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.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()
       components = New System.ruponentModel.Container()
       Me.Text = "Form1"
   End Sub

1. End Region

   Private Function GetClosedBezierPath(ByVal rect As Rectangle, ByVal points As Point()) As GraphicsPath
       Dim path As GraphicsPath = New GraphicsPath()
       path.AddBeziers(points)
       path.CloseFigure()
       Return path
   End Function

   Private Sub Form1_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim width As Integer = Me.ClientRectangle.Width
       Dim height As Integer = Me.ClientRectangle.Height
       Dim rect As Rectangle = New Rectangle(10, 10, width - 20, height - 20)
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Center
       format.LineAlignment = StringAlignment.Center
       Dim path As GraphicsPath = GetClosedBezierPath(rect, New Point() {New Point(25, height - 25), New Point(width - 25, height - 25), New Point(25, 25), New Point(width - 25, 25)})
       g.FillPath(Brushes.Yellow, path)
       g.DrawPath(Pens.Black, path)
   End Sub

End Class

      </source>

Draw Bezier

<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing.Text Imports System.Drawing Public Class MainClass

   Shared Sub Main(ByVal args As String())
       Dim myform As Form = New Form1()
       Application.Run(myform)
   End Sub

End Class

Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       " Define the Bezier curve"s control points.
       Dim pts() As Point = { _
           New Point(100, 100), _
           New Point(20, 10), _
           New Point(50, 200), _
           New Point(200, 150) _
       }
       " Connect the points with dashed lines.
       Dim dashed_pen As New Pen(Color.Black, 0)
       dashed_pen.DashStyle = Drawing2D.DashStyle.Dash
       For i As Integer = 0 To 2
           e.Graphics.DrawLine(dashed_pen, pts(i), pts(i + 1))
       Next i
       " Draw the Bezier curve.
       e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
       Dim bez_pen As New Pen(Color.Black, 3)
       e.Graphics.DrawBezier(bez_pen, pts(0), pts(1), pts(2), pts(3))
   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(364, 309)
       Me.Name = "Form1"
       Me.Text = "Title"
       Me.ResumeLayout(False)
   End Sub

End Class

      </source>

Draw Beziers Curves

<source lang="vbnet"> Imports System Imports System.Windows.Forms Imports System.Drawing.Text Imports System.Drawing Public Class MainClass

   Shared Sub Main(ByVal args As String())
       Dim myform As Form = New Form1()
       Application.Run(myform)
   End Sub

End Class

Public Class Form1

   Private Sub Form1_Paint(ByVal sender As Object, _
    ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
       " Define the Bezier curve"s control points.
       Dim pts() As Point = { _
           New Point(10, 10), _
           New Point(200, 10), _
           New Point(50, 200), _
           New Point(200, 150), _
           New Point(250, 50), _
           New Point(250, 200), _
           New Point(100, 250), _
           New Point(250, 50), _
           New Point(250, 200), _
           New Point(100, 250) _ 
       }
       " Connect the points with dashed lines.
       Dim dashed_pen As New Pen(Color.Black, 0)
       dashed_pen.DashStyle = Drawing2D.DashStyle.Dash
       For i As Integer = 0 To pts.Length - 2
           e.Graphics.DrawLine(dashed_pen, pts(i), pts(i + 1))
       Next i
       " Draw the Bezier curve.
       e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality
       Dim bez_pen As New Pen(Color.Black, 3)
       e.Graphics.DrawBeziers(bez_pen, 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(364, 309)
       Me.Name = "Form1"
       Me.Text = "Title"
       Me.ResumeLayout(False)
   End Sub

End Class

      </source>