Image Animation in VB.NET using GDI+

This article demonstrate you to implement different types of animations or transitions on images with the help of VB.NET using GDI+.
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In this article you will learn how to implement different animation effects or you can say transitions on images with the help of VB.NET using GDI+. You can make your slide shows, business presentations, videos, and screensavers more attractive and beautiful using transitions on the web pages/Windows Forms/videos with simple and very easy code.

Annimation Effect on Image in VB.NET using GDI+

animation.gif


Here we apply a simple light-weight timer implemented by the System.Threading.Timer that uses callback functions. Then we declare timer and hook up the Elapsed event for the timer and enable the timer.

Private Sub TimerTick(ByVal source As Object, ByVal e As System.Timers.ElapsedEventArgs)
   Dim ts As TimeSpan = DateTime.Now - m_AnimationStartTime
   m_AnimationPercent = CSng((100.0F / m_AnimationSpeed.TotalSeconds * ts.TotalSeconds))
   If m_AnimationPercent > 100 Then
     m_AnimationPercent = 100
   End If
   Invalidate()
End Sub

The following code example illustrates how to give effects to image
slides from bottom left to top right:

Protected Sub DrawAnimatedImage(ByVal g As Graphics, ByVal control As AnimationControl)
   If m_AnimatedBitmap IsNot Nothing Then
  
 Select Case m_AnimationType
      Case AnimationTypes.BottomLeftToTopRight ' Image effect
      Dim mx As New Drawing2D.Matrix(1, 0, 0, 1, (control.Width * m_AnimationPercent / 100) - control.Width, -(control.Height * m_AnimationPercent / 100) + control.Height)
      g.Transform = mx
      g.DrawImage(m_AnimatedBitmap, control.ClientRectangle, 0, 0, m_AnimatedBitmap.Width, m_AnimatedBitmap.Height, GraphicsUnit.Pixel)
      mx.Dispose()
      Exit Select
    End
Select
  End If
  If m_AnimationPercent = 100 Then
    AnimationStop()
  End If
End Sub

Now when you click on Slide button the image will come as a slide like this:

animation1.gif

Split Boom Animation

animation2.gif

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