--- ray/src/util/vwrays.c	2005/09/19 04:26:09	3.12
+++ ray/src/util/vwrays.c	2011/08/20 20:57:52	3.16
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: vwrays.c,v 3.12 2005/09/19 04:26:09 greg Exp $";
+static const char	RCSid[] = "$Id: vwrays.c,v 3.16 2011/08/20 20:57:52 greg Exp $";
 #endif
 /*
  * Compute rays corresponding to a given picture or view.
@@ -31,6 +31,8 @@ int	zfd = -1;
 
 int	fromstdin = 0;
 
+int	unbuffered = 0;
+
 char	*progname;
 
 
@@ -56,9 +58,11 @@ main(
 				break;
 			case 'f':			/* float */
 				putr = putf;
+				SET_FILE_BINARY(stdout);
 				break;
 			case 'd':			/* double */
 				putr = putd;
+				SET_FILE_BINARY(stdout);
 				break;
 			default:
 				goto userr;
@@ -103,13 +107,16 @@ main(
 			if (argv[i][2] == 'a')
 				pa = atof(argv[++i]);
 			else if (argv[i][2] == 'j')
-				pj= atof(argv[++i]);
+				pj = atof(argv[++i]);
 			else
 				goto userr;
 			break;
 		case 'i':			/* get pixels from stdin */
 			fromstdin = 1;
 			break;
+		case 'u':			/* unbuffered output */
+			unbuffered = 1;
+			break;
 		default:
 			goto userr;
 		}
@@ -149,7 +156,7 @@ main(
 	exit(0);
 userr:
 	fprintf(stderr,
-	"Usage: %s [ -i -f{a|f|d} | -d ] { view opts .. | picture [zbuf] }\n",
+	"Usage: %s [ -i -u -f{a|f|d} | -d ] { view opts .. | picture [zbuf] }\n",
 			progname);
 	exit(1);
 }
@@ -182,13 +189,6 @@ pix2rays(
 
 	while (fscanf(fp, "%lf %lf", &px, &py) == 2) {
 		px += .5; py += .5;
-		if (px < 0 || px >= rs.xr ||
-				py < 0 || py >= rs.yr) {
-			fprintf(stderr,
-				"%s: (x,y) pair (%.0f,%.0f) out of range\n",
-					progname, px, py);
-			exit(1);
-		}
 		loc[0] = px/rs.xr; loc[1] = py/rs.yr;
 		if (zfd >= 0) {
 			loc2pix(pp, &rs, loc[0], loc[1]);
@@ -216,6 +216,8 @@ pix2rays(
 			rdir[0] *= d; rdir[1] *= d; rdir[2] *= d;
 		}
 		(*putr)(rorg, rdir);
+		if (unbuffered)
+			fflush(stdout);
 	}
 	if (!feof(fp)) {
 		fprintf(stderr, "%s: expected px py on input\n", progname);