[Wavelength with gradual frequency change?]

The Sine Curves plugin is still available in Madjik's plugin pack.

http://forums.getpaint.net/index.php?showtopic=7186

Thanks

[Wavelength with gradual frequency change?]

Maybe this one? http://forums.getpaint.net/index.php?/topic/7647-

If not, maybe the author could help you out.

This looks like what I want, but the download link is broken

[Wavelength with gradual frequency change?]

Bit of a strange one, but here goes my first post.

 

I did a quick search and haven't been able to find one, but is there a plug-in or method that will allow me to create a kind of waveform (like a sine wave sort of) where the "frequency" gradually gets longer/shorter?

I could try doing it by hand, but it would irritate me like an itch knowing that it's not perfect, even if I got it to look good.

This is a quick drawing of what I'm kind of after:

 

A bit rough, just a quick scribble to get the idea across.

 

So any ideas how to achieve this kind of pattern?