#define Atan2	(		_Y,
			_X
	)		asm { atan2 __FLTRETVAL__, _Y, _X }

Compute arc tangent with 2 parameters.

Computes the principal value of the arc tangent of _Y/_X, expressed in radians. To compute the value, the function uses the sign of both arguments to determine the quadrant. Only constants or variables allowed (no expressions).

Deprecated:

Use atan2() instead.

Parameters

_Y	Floating point value representing a y coordinate.
_X	Floating point value representing an x coordinate.

Returns

Arc tangent of _Y/_X, in the interval [-pi,+pi] radians.