DrawRotateImage – rotating an image by a specified angle

DrawRotateImage – rotating an image by a specified angle

' Rotate an image by a specified angle (in degrees)' The x and y parameters are the coordinates of the upper-left point' Note: requires Imports System.Drawing.Imaging'' Example:'   Dim gr As Graphics = Me.CreateGraphics'   gr.Clear(Color.White)'   Dim bmp As New Bitmap("logo.bmp")'   DrawRotateImage(gr, bmp, 100, 220, 45)'   DrawRotateImage(gr, bmp, 300, 220, 90)'   DrawRotateImage(gr, bmp, 500, 220, 135)'   bmp.Dispose()'   gr.Dispose()Sub DrawRotateImage(ByVal gr As Graphics, ByVal bmp As Bitmap, _    ByVal x As Single, ByVal y As Single, ByVal angle As Single)    ' Convert the angle in degrees.    angle = angle / (180 / Math.PI)    ' Find the position of (x1,y1) and (x2,y2).    Dim x1 As Single = x + bmp.Width * Math.Cos(angle)    Dim y1 As Single = y + bmp.Width * Math.Sin(angle)    Dim x2 As Single = x - bmp.Height * Math.Sin(angle)    Dim y2 As Single = y + bmp.Height * Math.Cos(angle)    ' Create the points array.    Dim points() As Point = {New Point(x, y), New Point(x1, y1), New Point(x2, _        y2)}    ' Draw the rotated image    gr.DrawImage(bmp, points)End Sub' Note: This code is taken from Francesco Balena's' "Programming Microsoft Visual Basic .NET" - MS Press 2002, ISBN 0735613753' You can read a free chapter of the book at ' http://www.vb2themax.com/HtmlDoc.asp?Table=Books&ID=101000

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes