Fill an ellipse using SetBlendTriangularShape

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math

Public Class MainClass

   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 

End Class
 
Public Class Form1

    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim x As Integer = 10
        Dim y As Integer = 10
        Dim wid As Integer = 100
        Dim hgt As Integer = 50

        ' Fill a rectangle.
        Dim rect_pts() As Point = { _
            New Point(x, y), _
            New Point(x + wid, y), _
            New Point(x + wid, y + hgt), _
            New Point(x, y + hgt) _
        }
        Dim path_brush As New PathGradientBrush(rect_pts)
        Dim ellipse_path As New GraphicsPath
        ' Fill an ellipse using SetBlendTriangularShape.
        ellipse_path = New GraphicsPath
        ellipse_path.AddEllipse(x, y, wid, hgt)
        path_brush = New PathGradientBrush(ellipse_path)
        path_brush.CenterColor = Color.White
        path_brush.SurroundColors = New Color() {Color.Black}
        path_brush.SetBlendTriangularShape(0.5)
        e.Graphics.FillEllipse(path_brush, x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.CompilerServices.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.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(200, 200)
        Me.Name = "Form1"
        Me.Text = ""
        Me.ResumeLayout(False)

    End Sub

End Class

1.	Make a rectangle that shades from black to white
2.	Linear Gradient Brushes: Color Blend
3.	Linear Gradient Brushes: Make a brush that makes 50 percent of the color change
4.	Linear Gradient Brushes: This brush's line is too short to cross the whole rectangle
5.	Linear Gradient Brushes: Change the brush's WrapMode
6.	Linear Gradient Brushes: Trangular brush
7.	Linear Gradient Brushes: Sigma bell shape
8.	Linear Gradient Brushes: A diagonal brush
9.	Path Gradient Brush: rectangle
10.	Fill an ellipse setting CenterColor and SurroundColors
11.	Fill an ellipse using SetSigmaBellShape
12.	Linear Brush: draw ellipse filled with a blue-yellow gradient
13.	Linear Gradient Brushes: Normal, Triangle, Bell and custom color
14.	Path Gradient Brushes: Diamond, Rectangle, Cirlce and quad
15.	Gradient Paint

Fill an ellipse using SetBlendTriangularShape : Gradient « 2D « VB.Net

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