SNOISE2D

THE BOX'S MAIN HELP:

This function generates signed two-dimensional noise.
U and V are scalar seeds to the noise function.
The return value will be a scalar which lies in the range [-1,1].

U (input):

The input must be a scalar. 
These are the seeds to the noise function.

V (input):

The input must be a scalar. 
These are the seeds to the noise function.

OUT (output):

This function generates signed two-dimensional noise.
The return value will be a scalar which lies in the range [-1,1].

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