TOPOLAR2D

THE BOX'S MAIN HELP:

This function converts a 2D point (S,T) to polar coordinates:
the radius R and the angle THETA.

S (input):

This float represents horizontal direction on the 2D map.
The default is s.

T (input):

This float represents vertical direction on the 2D map.
The default is t.

R (output):

This is the radius.

THETA (output):

This is the angle in radians. The range is [-PI,PI].