VB.Net Tutorial/2D Graphics/Point PointF

Add first point and size to another point

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MainClass
   public Shared Sub Main
        Dim sz As New Size(12, 12)
        " Create a Point
        Dim pt As New Point(20, 20)
        " Add poitn and size and copy to point
        pt.X += sz.Width
        pt.Y += sz.Height
        Console.WriteLine("Addition :" + pt.ToString())
   End Sub
End class

Addition :{X=32,Y=32}

Draw line using PointF structure

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawLineUsingPointFStructure
   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 blackPen As New Pen(Color.Black, 4)
        " 
        " 
        Dim ptf1 As New PointF(20.0F, 20.0F)
        Dim ptf2 As New PointF(200.0F, 200.0F)
        e.Graphics.DrawLine(blackPen, ptf1, ptf2)
  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

Draw line using Point structure

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class DrawLineUsingPointStructure 
   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 blackPen As New Pen(Color.Black, 4)
        " 
        " 
        Dim pt1 As New Point(20, 20)
        Dim pt2 As New Point(20, 200)
        e.Graphics.DrawLine(blackPen, pt1, pt2)
  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

Point.Ceiling

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MainClass
   public Shared Sub Main
        Dim pt1 As New PointF(30.6F, 30.8F)
        Dim pt4 As Point = Point.Ceiling(pt1)
        Console.WriteLine(pt4.ToString())
   End Sub
End class

{X=31,Y=31}

PointF and PointDouble

Imports System.Drawing
Imports System.Drawing.Drawing2D
Public Class Tester
    Public Shared Sub Main
        " ----- Original PointF version.
        Dim singlePoint As New PointF(1 / 17, Math.PI)
        Console.WriteLine("PointF: " & singlePoint.ToString())
        Console.WriteLine("X: " & singlePoint.X)
        " ----- New Point2D version.
        Dim doublePoint As New Point2D(1 / 17, Math.PI)
        Console.WriteLine("Point2D: " & doublePoint.Tostring())
        Console.WriteLine("X: " & doublePoint.X)
        
    End Sub
End Class
Public Class Point2D
    Public X As Double
    Public Y As Double
    Public Sub New(ByVal xPoint As Double, _
          ByVal yPoint As Double)
        Me.X = xPoint
        Me.Y = yPoint
    End Sub
    Public Overrides Function Tostring() As String
        Return "{X=" & X & ",Y=" & Y & "}"
    End Function
End Class

PointF: {X=0.05882353, Y=3.141593}
X: 0.05882353
Point2D: {X=0.0588235294117647,Y=3.14159265358979}
X: 0.0588235294117647

Point.Round

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MainClass
   public Shared Sub Main
        Dim pt1 As New PointF(30.6F, 30.8F)
        Dim pt4 As Point = Point.Round(pt1)
        Console.WriteLine(pt4.ToString())
   End Sub
End class

{X=31,Y=31}

Point.Truncate

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MainClass
   public Shared Sub Main
        Dim pt1 As New PointF(30.6F, 30.8F)
        Dim pt4 As Point = Point.Truncate(pt1)
        Console.WriteLine(pt4.ToString())
   End Sub
End class

{X=30,Y=30}

Subtract point and size

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MainClass
   public Shared Sub Main
        " Create a Size 
        Dim sz As New Size(12, 12)
        " Create a Point
        Dim pt As New Point(20, 20)
        " Subtract point and size
        pt.X -= sz.Width
        pt.Y -= sz.Height
        Console.WriteLine("Subtraction :" + pt.ToString())

   End Sub
End class

Subtraction :{X=8,Y=8}

Use Point

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class UsePoint
   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 pt As New Point(50, 50)
        Dim newPoint As Point = Point.Empty
        newPoint.X = 100
        newPoint.Y = 200
        Dim g As Graphics = Graphics.FromHwnd(Me.Handle)
        Dim pn As New Pen(Color.Blue, 4)
        g.DrawLine(pn, pt, newPoint)
        pn.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

Use PointF

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class UsePointF
   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 pt As New PointF(50.0F, 50.0F)
        Dim newPoint As PointF = PointF.Empty
        newPoint.X = 100.0F
        newPoint.Y = 200.0F
        Dim g As Graphics = Graphics.FromHwnd(Me.Handle)
        Dim pn As New Pen(Color.Blue, 4)

        g.DrawLine(pn, pt, newPoint)
        pn.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