ArcTan2 Routine

Summary

Inverse tangens of Y/X.

Declaration

Function ArcTan2(y, x: TSample): TSample;

Result

the inverse tangens of Y/X, and returns an angle in the correct quadrant. The values of X and Y must be between -2p and 2p. If they are not, call the FixAngle function. In addition, the value of X can't be 0. The return value will fall in the range from -p to p radians. Note that ArcTan is calculated as ArcTan2(1, X).

See Also
ArcTan
Tan