[RESOLVED] Converting Frames-per-second to Timer Interval

[iMiles]

I have an animation program which allows users to import and animate images. I do this using timer events. I have a listbox which contains the image references, and a Image which displays the chosen image. Here is the code:

When the user clicks the "Animate" button:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles animate.Click
        Dim cananimate As Boolean = True
 
        'The secret code
        If Images.Items.Count > 0 Then
            Images.SelectedIndex = 0
 
            'While it has a image in front, keep animating
            If Not Images.SelectedIndex = Images.Items.Count - 1 Then
 
                Timer1.Start()
 
                'If only one image present, display a message
                If Images.Items.Count = 1 Then
                    MessageBox.Show("You must have more than one image to begin animating.")
                End If
            End If
        End If
    End Sub

Timer tick event:

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If Not Images.SelectedIndex = Images.Items.Count - 1 Then
            Cursor = Cursors.AppStarting
            Images.SelectedIndex += 1
            mainimage.Refresh()
            Cursor = Cursors.Default
            If Images.SelectedIndex + 1 = Images.Items.Count Then
                Timer1.Enabled = False
            End If
        End If
    End Sub

I want to make a dialog to appear and allow the user to select a custom FPS for the animation. For instance, if they type 15, the listbox must go down 15 images in 1 second. But how do I convert FPS to a timer interval?

[jmcilhinney]

It's simple maths. What does the Interval of a Timer mean? It's the number of milliseconds between Ticks, right? That means that 1000 is one Tick per second. Simply divide 1000 by your FPS and that's your Interval. 2 FPS is an Interval of 500, 10 PFS is an Interval of 100, etc.

As I said, this is simple maths. The fact that you didn't see that is an indication that you're trying to write the code before you solve the problem. Code is not the solution to a problem; it's an implementation of the solution. You need to look at the problem in practical terms first, come with an algorithm first, then write code to implement that algorithm. If you can't solve the problem with pen and paper then you shouldn't even be considering writing code.