Hi all,
I have written the following Lite-C function to shift a degree as a double value between -180° ... 0° ... +180°. The outcome is the same as the ang() function, but it works different: instead of repeatedly adding or subtracting a multiple of 360 degrees, I use the fmod function (which implements that maybe anyway, I don't know):

Code:
// clamps a floating point degree between -180° ... 0° ... +180°
double avAngleDegreeMod180(double angleDegree) {
   if (angleDegree > 180) {
      double remainder = fmod(angleDegree, 360);
      if (remainder > 180) {
         return -180 + (remainder - 180);
      } else {
         return remainder;
      }
   } else {
      if (angleDegree >= -180) {
         return angleDegree;
      } else {
         return -avAngleDegreeMod180(-angleDegree);
      }
   }
}

Can anyone think of a faster/more elegant solution? This feels somehow bloated... eek