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Language: VB7
Expertise: Intermediate
Nov 18, 2002



Building the Right Environment to Support AI, Machine Learning and Deep Learning

DrawSkewImage - skewing an image by a given amount along one or both axes

' Skew an image by a given amount along one or both axes (the dx and dy 
' parameters)
' 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")
'   DrawSkewImage(gr, bmp, 100, 400, -50, 0)
'   DrawSkewImage(gr, bmp, 300, 400, 0, 50)
'   DrawSkewImage(gr, bmp, 500, 400, -50, 50)
'   bmp.Dispose()
'   gr.Dispose()

Sub DrawSkewImage(ByVal gr As Graphics, ByVal bmp As Bitmap, ByVal x As Single, _
    ByVal y As Single, ByVal dx As Single, ByVal dy As Single)
    ' Find the position of (x1,y1) and (x2,y2).
    Dim x1 As Single = x + bmp.Width
    Dim y1 As Single = y + dy
    Dim x2 As Single = x + dx
    Dim y2 As Single = y + bmp.Height

    ' Create the points array.
    Dim points() As Point = {New Point(x, y), New Point(x1, y1), New Point(x2, _
    ' Draw the skewed 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
Francesco Balena
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