#define UNITS "icpPsu"
	/* units notation for:  inches, cm, points, picas,
			   scanner pixel (Scoor), and basic unit (also Scoor) */

#define INCHES_PER_POINT (0.013833)

#define RADIANS_PER_DEGREE (PI/180.0)
				/* degrees * DtoR = radians */
#define DtoR (RADIANS_PER_DEGREE)
				/* angle in radians */
#define Radians double