Bezier Splines : Bezier « 2D Graphics « VB.Net Tutorial






Bezier Splines
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.CompilerServices.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.ComponentModel.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








17.22.Bezier
17.22.1.Draw Beziers 1Draw Beziers 1
17.22.2.Draw Beziers 2Draw Beziers 2
17.22.3.Draw Beziers 3Draw Beziers 3
17.22.4.Bezier SplinesBezier Splines
17.22.5.Draw the Bezier curve and its outlineDraw the Bezier curve and its outline