FACEFORWARD
THE BOX'S MAIN HELP:
The result is A, if A and B form an acute angle when placed head to tail, otherwise the result is -A.
A (input):
This is the first input vector.
B (input):
This is the second input vector.
OUT (output):
The result is A, if A and B form an acute angle when placed head to tail, otherwise the result is -A.