--- ray/src/rt/p_func.c	1989/02/02 10:41:34	1.1
+++ ray/src/rt/p_func.c	2014/07/08 18:25:00	2.8
@@ -1,16 +1,15 @@
-/* Copyright (c) 1986 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: p_func.c,v 2.8 2014/07/08 18:25:00 greg Exp $";
 #endif
-
 /*
  *  p_func.c - routine for procedural patterns.
- *
- *     4/8/86
  */
 
+#include "copyright.h"
+
 #include  "ray.h"
+#include  "func.h"
+#include  "rtotypes.h"
 
 /*
  *	A procedural pattern can either be a brightness or a
@@ -35,57 +34,51 @@ static char SCCSid[] = "$SunId$ LBL";
  */
 
 
-p_bfunc(m, r)			/* compute brightness pattern */
-register OBJREC  *m;
-RAY  *r;
+int
+p_bfunc(			/* compute brightness pattern */
+	OBJREC  *m,
+	RAY  *r
+)
 {
-	extern double  varvalue();
-	extern int  errno;
 	double  bval;
-	register char  **sa;
+	MFUNC  *mf;
 
-	setfunc(m, r);
-
-	sa = m->oargs.sarg;
-
 	if (m->oargs.nsargs < 2)
 		objerror(m, USER, "bad # arguments");
-	if (!vardefined(sa[0]))
-		loadfunc(sa[1]);
+	mf = getfunc(m, 1, 0x1, 0);
+	setfunc(m, r);
 	errno = 0;
-	bval = varvalue(sa[0]);
-	if (errno) {
+	bval = evalue(mf->ep[0]);
+	if (errno == EDOM || errno == ERANGE) {
 		objerror(m, WARNING, "compute error");
-		return;
+		return(0);
 	}
 	scalecolor(r->pcol, bval);
+	return(0);
 }
 
 
-p_cfunc(m, r)			/* compute color pattern */
-register OBJREC  *m;
-RAY  *r;
+int
+p_cfunc(			/* compute color pattern */
+	OBJREC  *m,
+	RAY  *r
+)
 {
-	extern double  varvalue();
-	extern int  errno;
 	COLOR  cval;
-	register char  **sa;
+	MFUNC  *mf;
 
-	setfunc(m, r);
-
-	sa = m->oargs.sarg;
-
 	if (m->oargs.nsargs < 4)
 		objerror(m, USER, "bad # arguments");
-	if (!vardefined(sa[0]))
-		loadfunc(sa[3]);
+	mf = getfunc(m, 3, 0x7, 0);
+	setfunc(m, r);
 	errno = 0;
-	setcolor(cval, varvalue(sa[0]),
-			varvalue(sa[1]),
-			varvalue(sa[2]));
-	if (errno) {
+	setcolor(cval, evalue(mf->ep[0]),
+			evalue(mf->ep[1]),
+			evalue(mf->ep[2]));
+	if (errno == EDOM || errno == ERANGE) {
 		objerror(m, WARNING, "compute error");
-		return;
+		return(0);
 	}
 	multcolor(r->pcol, cval);
+	return(0);
 }