AngularDistance

//Returns the (signed) difference between angle a and b.
//i.e., how far in degrees angle a must move to align with angle b.
float AngularDistance(float a, float b)
{
    int s; int ret;
    int d = (Abs(b-a)%360);
    if ( d >= 0 )
    {
        if ( d <= 180 ) { s = -1; }
    }
    else if ( d <= -180 )
    {
        if ( d >= -360 ) { s = -1; }
    }
    else s = 1;

    if ( d > 180 )
    {
        return ((360 - d)*s);
    }
    else { return (d*s); }
}


float AngleDifference(float angle1, float angle2)
{
    int diff = Abs(angle1-angle2);
    if ( angle1 < angle2 )  {    return WrapDegrees(diff)*-1; }
    else return WrapDegrees(diff);
}