--- ray/src/util/rsensor.c	2011/06/20 23:08:43	2.11
+++ ray/src/util/rsensor.c	2013/10/16 04:35:50	2.13
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rsensor.c,v 2.11 2011/06/20 23:08:43 greg Exp $";
+static const char RCSid[] = "$Id: rsensor.c,v 2.13 2013/10/16 04:35:50 greg Exp $";
 #endif
 
 /*
@@ -398,9 +398,10 @@ init_ptable(
 		tvals[i] = 1. - ( (1.-frac)*cos(thdiv[t]) +
 						frac*cos(thdiv[t+1]) );
 				/* offset b/c sensor values are centered */
-		if (!t || (t < sntp[0]-1) & (frac >= 0.5))
-			frac -= 0.5;
-		else {
+		if ((t < sntp[0]-1) & (frac >= 0.5)) {
+			if ((frac -= 0.5) < 0)
+				frac = 0;
+		} else {
 			frac += 0.5;
 			--t;
 		}
@@ -544,7 +545,7 @@ comp_sensor(
 				continue;
 			}
 			rr.rmax = .0;
-			rayorigin(&rr, PRIMARY, NULL, NULL);
+			rayorigin(&rr, PRIMARY|SPECULAR, NULL, NULL);
 			scalecolor(rr.rcoef, sf);
 			if (ray_pqueue(&rr) == 1)
 				addcolor(vsum, rr.rcol);
@@ -560,7 +561,7 @@ comp_sensor(
 			continue;
 		}
 		rr.rmax = .0;
-		rayorigin(&rr, PRIMARY, NULL, NULL);
+		rayorigin(&rr, PRIMARY|SPECULAR, NULL, NULL);
 		scalecolor(rr.rcoef, sf);
 		if (ray_pqueue(&rr) == 1)
 			addcolor(vsum, rr.rcol);