--- ray/src/util/glare.h	1991/03/18 12:15:39	1.1
+++ ray/src/util/glare.h	1991/03/18 15:06:30	1.3
@@ -27,13 +27,13 @@ extern char	*progname;		/* global argv[0] */
 
 extern ANGLE	glarang[];		/* glare calculation angles */
 extern int	nglarangs;
+extern double	maxtheta;		/* maximum glare angle (in radians) */
 extern int	hsize;			/* horizontal size */
 extern int	hlim;			/* horizontal limit of central view */
 
 #define nglardirs	(2*nglarangs+1)
-#define maxtheta	((PI/180.)*glarang[nglarangs-1])
 #define vsize		SAMPDENS
-#define h_theta(h)	((double)(h)/(double)SAMPDENS)
+#define h_theta(h)	((double)(h)/-(double)SAMPDENS)
 
 extern struct illum {
 	float	theta;		/* glare direction */