[Gimp-user] How to change center point for distorts?

[JDawg <forums gimpusers com>]

I'm trying to do a series of WAVE distorts on an image, but it seems the shape
of the distort is driven by the image size and shape, not the selected area. 
And the center of the distort is always the center of the image, and again, not
the center of the selected area.

Is there a way to change the center point of the distortion so that I can create
a wave distortion, for example, focused on several different points on my
drawing?

-- 
JDawg (via www.gimpusers.com/forums)