mathLib.atan2

The system function mathLib.atan2 computes the principal value of the arc tangent of y/x, using the signs of both arguments to determine the quadrant of the return value. The result is in radians and is in the range of -pi to pi.

sysLib.atan2 syntax diagram

result: Any numeric or HEX item, as described in Mathematical (system words). The value returned by mathLib.atan2 is converted to the format of result and returned in result.
numericItem1: Any numeric or HEX item, as described in Mathematical (system words). The item is converted to double-precision floating point before mathLib.atan2 is called. numericItem1 is the y value.
numericItem2: Any numeric or HEX item, as described in Mathematical (system words). The item is converted to double-precision floating point before mathLib.atan2 is called. numericItem2 is the x value.

Example

  myItemY = 1;
  myItemX = 5;

  // returns pi/2
  result = mathLib.atan2(myItemY, myItemX);

Related reference
Mathematical (system words)