THE BOX'S MAIN HELP:

This function computes the derivative of A with respect to v.
The result will be the same data type as A.
It will be 0 if A does not vary.

A (input):

Can be a float, point, normal, vector or color.
The result will be 0 if A does not vary.

OUT (output):

This function computes the derivative of A with respect to v.
The result will be the same data type as A.
It will be 0 if A does not vary.