// We store the angle in clockwise radians for more efficient
// calculations.
// So 0=right, pi=down etc.

persistable sclass Angle {
  double radians;
  
  *(double *radians) {}
  
  // Create angle from x/y ratio
  *(double x, double y) { radians = atan2(x, y); }
  
  static Angle fromRadians(double radians) { ret new Angle(radians); }
  static Angle fromDegrees(double degrees) { ret new Angle(degreesToRadians(degrees); }

  double radians() { ret radians; }
  double degrees() { ret radiansToDegrees(radians); }
  
  double x() { ret cos(radians); }
  double y() { ret sin(radians); }
  
  toString { ret formatDouble(degrees(), 1) + "°"; }
}