SKMath.AngleDist

static float AngleDist(float a, float b)

   
float a First angle, in degrees.
float b Second angle, in degrees.
RETURNS: float Degrees 0-180, the minimum angle between a and b.

Calculates the minimum angle ‘distance’ between two angles. This covers wraparound cases like: the minimum distance between 10 and 350 is 20. Only works on angles in the range of 0-360.