WaterRippleBrush(id[, wavelength, amplitude, phase, cx, cy])
Wavelength
, amplitude
, and phase
control the
look of the ripples, whereas the cx
and cy
arguments can be used to
specify the center point of the ripple. This point must be specified as
a floating point value ranging from 0.0 (left/top) to 1.0 (right/bottom).
The center of the brush is thus at position 0.5/0.5.