SNAKE
THE BOX'S MAIN HELP:
This function returns a snaky pattern.
FU (input):
This must be a float. The default is 8.0. Control the number of scallops around the pattern.
FV (input):
This must be a float. The default is 8.0. Control the number of scallops down the pattern.
U (input):
This must be a varying float. The default is state->tex_list[0].x. This value controls the horizonal direction of the pattern.
V (input):
This must be a varying float. The default is state->tex_list[0].y. This value controls the vertical direction of the pattern.
OUT (output):
This function returns a snaky pattern.