--- ray/src/rt/rtrace.c	1992/07/21 10:36:37	2.7
+++ ray/src/rt/rtrace.c	1992/11/19 20:26:10	2.10
@@ -50,7 +50,7 @@ double  shadthresh = .05;		/* shadow threshold */
 double  shadcert = .5;			/* shadow certainty */
 int  directrelay = 1;			/* number of source relays */
 int  vspretest = 512;			/* virtual source pretest density */
-int  directinvis = 0;			/* sources invisible? */
+int  directvis = 1;			/* sources visible? */
 double  srcsizerat = .25;		/* maximum ratio source size/dist. */
 
 double  specthresh = .15;		/* specular sampling threshold */
@@ -73,7 +73,7 @@ extern OBJREC  Lamb;			/* a Lambertian surface */
 static RAY  thisray;			/* for our convenience */
 
 static int  oputo(), oputd(), oputv(), oputl(), oputL(),
-		oputp(), oputn(), oputs(), oputw(), oputm();
+		oputp(), oputn(), oputN(), oputs(), oputw(), oputm();
 
 static int  (*ray_out[10])(), (*every_out[10])();
 static int  castonly;
@@ -118,6 +118,10 @@ char  *fname;
 		sprintf(errmsg, "cannot open input file \"%s\"", fname);
 		error(SYSTEM, errmsg);
 	}
+#ifdef MSDOS
+	if (inform != 'a')
+		setmode(fileno(fp), O_BINARY);
+#endif
 					/* set up output */
 	setoutput(outvals);
 	switch (outform) {
@@ -198,9 +202,13 @@ register char  *vs;
 		case 'p':				/* point */
 			*table++ = oputp;
 			break;
-		case 'n':				/* normal */
+		case 'n':				/* perturbed normal */
 			*table++ = oputn;
+			castonly = 0;
 			break;
+		case 'N':				/* unperturbed normal */
+			*table++ = oputN;
+			break;
 		case 's':				/* surface */
 			*table++ = oputs;
 			break;
@@ -396,7 +404,7 @@ register RAY  *r;
 
 
 static
-oputn(r)				/* print normal */
+oputN(r)				/* print unperturbed normal */
 register RAY  *r;
 {
 	if (r->rot < FHUGE) {
@@ -408,6 +416,25 @@ register RAY  *r;
 		(*putreal)(0.0);
 		(*putreal)(0.0);
 	}
+}
+
+
+static
+oputn(r)				/* print perturbed normal */
+RAY  *r;
+{
+	FVECT  pnorm;
+
+	if (r->rot >= FHUGE) {
+		(*putreal)(0.0);
+		(*putreal)(0.0);
+		(*putreal)(0.0);
+		return;
+	}
+	raynormal(pnorm, r);
+	(*putreal)(pnorm[0]);
+	(*putreal)(pnorm[1]);
+	(*putreal)(pnorm[2]);
 }