code: public static Vector3d createDirectionDeg(double theta, double phi) {
          return createDirectionRad((double) Math.toRadians(theta), (double) Math.toRadians(phi));
      }
docs: Gets the direction vector of a certain theta and phi in degrees. This uses the standard math spherical coordinate system.
  
  @param theta in degrees
  @param phi in degrees
  @return the direction vector