RIPPLES

THE BOX'S MAIN HELP:

This function generates a rippling pattern.

FX (input):

This must be a float.  The default is 4.
This controls the number of ripples in the x direction.

FY (input):

This must be a float.  The default is 4.
This controls the number of ripples in the y direction.

XX (input):

This must be a varying float.
The default is state->tex_list[0].x.

YY (input):

This must be a varying float.
The default is state->tex_list[0].y.

OFF (input):

This must be a scalar.  The default is 0.0.
It can be used to offset the phase of the waves.

OUT (output):

This function returns a rippling pattern.