--- ray/src/util/findglare.c	1991/04/02 14:29:15	1.13
+++ ray/src/util/findglare.c	1991/04/05 14:26:47	1.15
@@ -290,6 +290,9 @@ compdir(vd, x, y)			/* compute direction for x,y */
 FVECT	vd;
 int	x, y;
 {
+	static int	cury = 10000;
+	static double	err, cmpval;
+	long	t;
 	FVECT	org;			/* dummy variable */
 
 	if (x <= -hlim)			/* left region */
@@ -300,7 +303,17 @@ int	x, y;
 		return(viewray(org, vd, &rightview,
 				(double)(x-hlim)/(2*sampdens)+.5,
 				(double)y/(2*sampdens)+.5));
-						/* central region */
+					/* central region */
+				/* avoid over-counting of poles */
+	if (cury != y) {
+		err = 0.0;
+		cmpval = sqrt(1.0 - (double)((long)y*y)/((long)vsize*vsize));
+		cury = y;
+	}
+	err += cmpval;
+	if (err <= 0.5)
+		return(-1);
+	err -= 1.0;
 	if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0)
 		return(-1);
 	spinvector(vd, vd, ourview.vup, h_theta(x));