VB.Net Tutorial/2D Graphics/Matrix

Assign Matrix to Graphics.Transform

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class ScalingMatrixOrder

  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)
       Dim g As Graphics = Me.CreateGraphics()
       g.Clear(Me.BackColor)
       Dim curBitmap As New Bitmap("yourfile.jpg") "
       Dim X As New Matrix
       X.Scale(2, 1, MatrixOrder.Append)
       g.Transform = X
       g.DrawImage(curBitmap, New Rectangle(0, 0, 200, 200), 0, 0, curBitmap.Width, curBitmap.Height, GraphicsUnit.Pixel)
       curBitmap.Dispose()
       g.Dispose()
 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>

Matrix.Invert

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class MatrixReflection

  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)
       Dim g As Graphics = Me.CreateGraphics()
       g.Clear(Me.BackColor)
       Dim curBitmap As New Bitmap("yourfile.jpg") "
       Dim X As New Matrix
       X.Invert()
       g.Transform = X
       g.DrawImage(curBitmap, New Rectangle(0, 0, 200, 200), 0, 0, curBitmap.Width, curBitmap.Height, GraphicsUnit.Pixel)
       " Dispose
       curBitmap.Dispose()
       g.Dispose()
 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>

Matrix Operation Invert

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class Test

  public Shared Sub Main
       Console.WriteLine("Original values: ")
       " Create a Matrix object
       Dim X As New Matrix(2, 1, 3, 1, 0, 4)
       " Write its values
       Dim i As Integer
       For i = 0 To X.Elements.Length - 1
           Console.WriteLine(X.Elements(i))
       Next i
       Console.WriteLine("Inverted values: ")
       " Invert Matrix
       X.Invert()
       Dim pts As Single() = X.Elements
       " Read inverted Matrix
       Dim i1 As Integer
       For i = 0 To pts.Length - 1
           Console.WriteLine(pts(i))
       Next i
  End Sub

End class</source>

Matrix Operation Multiply

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class Test

  public Shared Sub Main
       Dim X As New Matrix(2.0F, 1.0F, 3.0F, 1.0F, 0.0F, 4.0F)
       Dim Y As New Matrix(0.0F, 1.0F, -1.0F, 0.0F, 0.0F, 0.0F)
       X.Multiply(Y, MatrixOrder.Append)
       " Read the result Matrix
       Dim i As Integer
       For i = 0 To X.Elements.Length - 1
           Console.WriteLine(X.Elements(i).ToString())
       Next i

  End Sub

End class</source>

Matrix: RotateAt

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class MatrixRotateAt

  public Shared Sub Main
       Application.Run(New RotateForm)
  End Sub

End class

Public Class RotateForm

   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()
       "
       "RotateForm
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(280, 214)
       Me.Name = "RotateForm"
       Me.Text = "RotateForm"
   End Sub

1. End Region

   Sub RotateForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim x As Integer = 400
       Dim y As Integer = 400
       Dim width As Integer = 250
       Dim height As Integer = 250
       Dim textWidth As Single = g.MeasureString("00", Me.Font).Width
       Dim length As Single = 250
       Dim textRect As RectangleF = New RectangleF(x + length, y - Me.Font.GetHeight(g) / 2, length, textWidth)
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Near
       format.LineAlignment = StringAlignment.Center
       Dim i As Integer
       For i = 0 To 360 Step 5
           Dim matrix As Matrix = New Matrix()
           matrix.RotateAt(i, New PointF(x, y))
           g.Transform = matrix
           g.DrawLine(Pens.Black, x, y, x + length, y)
           g.DrawString(i.ToString(), Me.Font, Brushes.Black, textRect, format)
       Next
   End Sub

End Class</source>

Matrix: Shear(0,0)

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class Shearing0

  public Shared Sub Main
       Application.Run(New ShearingForm)
  End Sub

End class

Public Class ShearingForm

   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 = "ShearingForm"
   End Sub

1. End Region

   Sub Foo(ByVal g As Graphics)
       Dim matrix As Matrix = New Matrix()
       matrix.Translate(10, 20)
       matrix.Scale(2, 3)
       matrix.Reset()
       matrix.Scale(2, 3)
       matrix.Translate(10, 20, MatrixOrder.Append)
       g.Transform = matrix
       g.DrawString("(0,0)", Me.Font, Brushes.Black, 0, 0)
   End Sub
   Sub ShearingForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim width As Single = 200
       Dim height As Single = 50
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Center
       format.LineAlignment = StringAlignment.Center
       Dim rect As RectangleF = New RectangleF(0, 0, width, height)
       Dim matrix As Matrix = New Matrix()
       matrix.Shear(0.0F, 0.0F)
       g.Transform = matrix
       g.DrawString("Shear(0,0)", Me.Font, Brushes.Black, rect, format)
       g.DrawRectangle(Pens.Black, rect.X, rect.Y, rect.Width, rect.Height)
   End Sub

End Class</source>

Matrix: Shear(0)

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class Shearing05

  public Shared Sub Main
       Application.Run(New ShearingForm)
  End Sub

End class

Public Class ShearingForm

   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 = "ShearingForm"
   End Sub

1. End Region

   Sub ShearingForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim width As Single = 200
       Dim height As Single = 50
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Center
       format.LineAlignment = StringAlignment.Center
       Dim rect As RectangleF = New RectangleF(0, 0, width, height)
       Dim matrix As Matrix = New Matrix()
       matrix.Shear(0.5F, 0.0F)
       g.Transform = matrix
       g.DrawString("Shear(0,0)", Me.Font, Brushes.Black, rect, format)
       g.DrawRectangle(Pens.Black, rect.X, rect.Y, rect.Width, rect.Height)
   End Sub

End Class</source>

Matrix: Shear(1,0)

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class Shearing11

  public Shared Sub Main
       Application.Run(New ShearingForm)
  End Sub

End class

Public Class ShearingForm

   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 = "ShearingForm"
   End Sub

1. End Region

   Sub ShearingForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim width As Single = 200
       Dim height As Single = 50
       Dim format As StringFormat = New StringFormat()
       format.Alignment = StringAlignment.Center
       format.LineAlignment = StringAlignment.Center
       Dim rect As RectangleF = New RectangleF(0, 0, width, height)
       Dim matrix As Matrix = New Matrix()
       matrix.Shear(1.0F, 0.0F)
       g.Transform = matrix
       g.DrawRectangle(Pens.Black, rect.X, rect.Y, rect.Width, rect.Height)
   End Sub

End Class</source>

Matrix: Translate

<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class MatrixTranslationDemo

  public Shared Sub Main
       Application.Run(New TranslationForm)
  End Sub

End class

Public Class TranslationForm

   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 = "TranslationForm"
   End Sub

1. End Region

   Sub TranlationForm_Pain(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
       Dim g As Graphics = e.Graphics
       Dim rect As RectangleF = New RectangleF(0, 0, 125, 125)
       g.FillRectangle(Brushes.White, rect)
       g.DrawRectangle(Pens.Black, rect.X, rect.Y, rect.Width, rect.Height)
       Dim matrix As Matrix = New Matrix()
       matrix.Translate(150, 150)
       g.Transform = matrix
       g.FillRectangle(Brushes.White, rect)
       g.DrawRectangle(Pens.Black, rect.X, rect.Y, rect.Width, rect.Height)
   End Sub

End Class</source>

Mirror Text: use Drawing2D.Matrix to transform Graphics

<source lang="vbnet">"Visual Basic 2005 Cookbook Solutions for VB 2005 Programmers "by Tim Patrick (Author), John Craig (Author) "# Publisher: O"Reilly Media, Inc. (September 21, 2006) "# Language: English "# ISBN-10: 0596101775 "# ISBN-13: 978-0596101770

Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class MirrorText

  public Shared Sub Main
       Application.Run(New Form1)
  End Sub

End class Public Class Form1

   Private Const QuoteText As String = "www.vbex.ru"
   Private Sub VerticalMirror_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles VerticalMirror.CheckedChanged
       MirroredText.Invalidate()
   End Sub
   Private Sub MirroredText_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MirroredText.Paint
       Dim drawingArea As Rectangle
       Dim saveState As Drawing2D.GraphicsState
       Dim mirrorMatrix As Drawing2D.Matrix
       e.Graphics.Clear(Color.White)
       If (VerticalMirror.Checked = True) Then
           drawingArea = New Rectangle(5, 5, _
               (MirroredText.ClientRectangle.Width \ 2) - 10, _
               MirroredText.ClientRectangle.Height - 10)
           e.Graphics.DrawLine(Pens.Black, MirroredText.ClientRectangle.Width \ 2, _
               5, MirroredText.ClientRectangle.Width \ 2, _
               MirroredText.ClientRectangle.Height - 10)
       Else
           drawingArea = New Rectangle(5, 5, _
               MirroredText.ClientRectangle.Width - 10, _
               (MirroredText.ClientRectangle.Height \ 2) - 10)
           e.Graphics.DrawLine(Pens.Black, 5, _
               MirroredText.ClientRectangle.Height \ 2, _
               MirroredText.ClientRectangle.Width - 10, _
               MirroredText.ClientRectangle.Height \ 2)
       End If
       e.Graphics.DrawString(QuoteText, MirroredText.Font, _
           Brushes.Black, drawingArea)
       saveState = e.Graphics.Save()
       If (VerticalMirror.Checked = True) Then
           mirrorMatrix = New Drawing2D.Matrix(-1, 0, 0, 1, MirroredText.ClientRectangle.Width, 0)
       Else
           mirrorMatrix = New Drawing2D.Matrix(1, 0, 0, -1, 0, MirroredText.ClientRectangle.Height)
       End If
       e.Graphics.Transform = mirrorMatrix
       e.Graphics.DrawString(QuoteText, MirroredText.Font, _
           Brushes.Black, drawingArea)
       e.Graphics.Restore(saveState)
   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.VerticalMirror = New System.Windows.Forms.RadioButton
       Me.MirroredText = New System.Windows.Forms.PictureBox
       Me.HorizontalMirror = New System.Windows.Forms.RadioButton
       CType(Me.MirroredText, System.ruponentModel.ISupportInitialize).BeginInit()
       Me.SuspendLayout()
       "
       "VerticalMirror
       "
       Me.VerticalMirror.AutoSize = True
       Me.VerticalMirror.Checked = True
       Me.VerticalMirror.Location = New System.Drawing.Point(8, 8)
       Me.VerticalMirror.Name = "VerticalMirror"
       Me.VerticalMirror.Size = New System.Drawing.Size(60, 17)
       Me.VerticalMirror.TabIndex = 0
       Me.VerticalMirror.TabStop = True
       Me.VerticalMirror.Text = "&Vertical"
       Me.VerticalMirror.UseVisualStyleBackColor = True
       "
       "MirroredText
       "
       Me.MirroredText.BackColor = System.Drawing.Color.White
       Me.MirroredText.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle
       Me.MirroredText.Location = New System.Drawing.Point(104, 8)
       Me.MirroredText.Name = "MirroredText"
       Me.MirroredText.Size = New System.Drawing.Size(304, 168)
       Me.MirroredText.TabIndex = 1
       Me.MirroredText.TabStop = False
       "
       "HorizontalMirror
       "
       Me.HorizontalMirror.AutoSize = True
       Me.HorizontalMirror.Location = New System.Drawing.Point(8, 32)
       Me.HorizontalMirror.Name = "HorizontalMirror"
       Me.HorizontalMirror.Size = New System.Drawing.Size(72, 17)
       Me.HorizontalMirror.TabIndex = 1
       Me.HorizontalMirror.Text = "&Horizontal"
       Me.HorizontalMirror.UseVisualStyleBackColor = True
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(419, 187)
       Me.Controls.Add(Me.HorizontalMirror)
       Me.Controls.Add(Me.MirroredText)
       Me.Controls.Add(Me.VerticalMirror)
       Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
       Me.MaximizeBox = False
       Me.Name = "Form1"
       Me.Text = "Mirror Text"
       CType(Me.MirroredText, System.ruponentModel.ISupportInitialize).EndInit()
       Me.ResumeLayout(False)
       Me.PerformLayout()
   End Sub
   Friend WithEvents VerticalMirror As System.Windows.Forms.RadioButton
   Friend WithEvents MirroredText As System.Windows.Forms.PictureBox
   Friend WithEvents HorizontalMirror As System.Windows.Forms.RadioButton

End Class</source>