--- ray/src/rt/o_face.c	1991/11/12 17:09:17	2.1
+++ ray/src/rt/o_face.c	2004/03/30 16:13:01	2.5
@@ -1,23 +1,22 @@
-/* Copyright (c) 1990 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char RCSid[] = "$Id: o_face.c,v 2.5 2004/03/30 16:13:01 schorsch Exp $";
 #endif
-
 /*
  *  o_face.c - compute ray intersection with faces.
- *
- *     8/29/85
  */
 
-#include  "ray.h"
+#include "copyright.h"
 
+#include  "ray.h"
 #include  "face.h"
+#include  "rtotypes.h"
 
 
-o_face(o, r)		/* compute intersection with polygonal face */
-OBJREC  *o;
-register RAY  *r;
+extern int
+o_face(		/* compute intersection with polygonal face */
+	OBJREC  *o,
+	register RAY  *r
+)
 {
 	double  rdot;		/* direction . normal */
 	double  t;		/* distance to intersection */
@@ -57,6 +56,8 @@ register RAY  *r;
 	VCOPY(r->rop, pisect);
 	VCOPY(r->ron, f->norm);
 	r->rod = rdot;
+	r->pert[0] = r->pert[1] = r->pert[2] = 0.0;
+	r->uv[0] = r->uv[1] = 0.0;
 	r->rox = NULL;
 
 	return(1);				/* hit */