<dl>
<dt><b>Command:</b>
<dt><b>Type:</b>
<dt><b>Download:</b> <dd>
<dt><b>Description:</b> <dd> Apply concentric wave effect such as produced by tossing a pebble in a pond.
<dt><b>Pre-loop code:</b> <dd>
<dt><b>Loop code:</b> <dd>
<dt><b>Post-loop code:</b> <dd>
<dt><b>Triggers:</b> <dd> maximum amplitude and period set to width or
<dt><b>Parameters:</b>
  <dd>$p0 - Amplitude</dd>
  <dd>$p1 - Wavelength</dd>
  <dd>$p2 - Velocity</dd>
  <dd>$p3 - Outward
<dt><b>Notes:</b> <dd>Personally, I would have preferred to call this effect "Ripple" and the [ripple|Ripple] effect "Waves" (if for no other reason than that the Grateful Dead's "Ripple" is about pond waves). Nonetheless, the names for these two effects as implemented in GIMP are retained for consistency.