VB.Net/2D/Bezier

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Beziers Curve Demo

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


Closed Bezier Path Demo

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


Draw Bezier

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


Draw Beziers Curves

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
Источник — «http://vbex.ru/index.php?title=VB.Net/2D/Bezier&oldid=55»