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
- 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
- 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
- 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
- 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>