VB.Net Tutorial/2D Graphics/Bezier
Содержание
Bezier Splines
<source lang="vbnet">Imports System.Drawing.Drawing2D Imports System.Windows.Forms Imports System.Drawing Imports System.Collections public class BezierSplines
public Shared Sub Main Application.Run(New Form1) End Sub
End class
Public Class Form1
Dim BendPoints As New Generic.List(Of Point) Private Sub Form1_MouseClick(ByVal sender As Object, _ ByVal e As System.Windows.Forms.MouseEventArgs) _ Handles Me.MouseClick BendPoints.Add(New Point(e.X, e.Y)) Me.Refresh() End Sub Private Sub Form1_Paint(ByVal sender As Object, _ ByVal e As System.Windows.Forms.PaintEventArgs) _ Handles Me.Paint Dim canvas As Graphics = e.Graphics If (BendPoints.Count >= 4) Then canvas.DrawBezier(Pens.Black, BendPoints(0), BendPoints(1), BendPoints(2), BendPoints(3)) BendPoints.Clear() End If End Sub
End Class
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected 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(531, 394) Me.Name = "Form1" Me.Text = "Drawing Bezier Splines" Me.ResumeLayout(False) End Sub
End Class</source>
Draw Beziers 1
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class DrawBeziers1
public Shared Sub Main Application.Run(New BeziersForm) 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 pen As Pen = New Pen(Color.Red, 4) Dim pointPen As Pen = New Pen(Color.Black, 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.DrawBeziers(pen, points) End Sub
End Class</source>
Draw Beziers 2
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class DrawBeziers2
public Shared Sub Main Application.Run(New BeziersForm) 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 pen As Pen = New Pen(Color.Red, 4) Dim pointPen As Pen = New Pen(Color.Black, 3) pointPen.StartCap = pointPen.EndCap = LineCap.SquareAnchor Dim points As PointF() 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.DrawBeziers(pen, points) End Sub
End Class</source>
Draw Beziers 3
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class DrawBeziers3
public Shared Sub Main Application.Run(New BeziersForm) 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 pen As Pen = New Pen(Color.Red, 4) Dim pointPen As Pen = New Pen(Color.Black, 3) pointPen.StartCap = pointPen.EndCap = LineCap.SquareAnchor Dim points As PointF() 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.DrawBeziers(pen, points) End Sub
End Class</source>
Draw the Bezier curve and its outline
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class BezierCurveAndItsOutline
public Shared Sub Main Application.Run(New Form1) End Sub
End class public class Form1
Inherits System.Windows.Forms.Form Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs) " 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) _ } 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 " . e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality Dim bez_pen As New Pen(Color.Black, 3) e.Graphics.DrawBeziers(bez_pen, pts) End Sub Public Sub New() MyBase.New() Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(292, 273) Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen End Sub
End Class</source>