--- ray/src/rt/mx_data.c	1991/11/12 17:08:29	2.1
+++ ray/src/rt/mx_data.c	1998/08/10 18:35:14	2.4
@@ -1,7 +1,7 @@
-/* Copyright (c) 1988 Regents of the University of California */
+/* Copyright (c) 1998 Silicon Graphics, Inc. */
 
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static char SCCSid[] = "$SunId$ SGI";
 #endif
 
 /*
@@ -14,6 +14,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  "data.h"
 
+#include  "func.h"
+
 /*
  *	A stored mixture is specified:
  *
@@ -37,49 +39,47 @@ mx_data(m, r)			/* interpolate mixture data */
 register OBJREC  *m;
 RAY  *r;
 {
-	extern double  varvalue(), funvalue(), datavalue();
-	extern int  errno;
-	register int  i;
+	OBJECT	obj;
 	double  coef;
 	double  pt[MAXDIM];
 	DATARRAY  *dp;
 	OBJECT  mod[2];
-	register char  **sa;
+	register MFUNC  *mf;
+	register int  i;
 
-	setfunc(m, r);
-
-	sa = m->oargs.sarg;
-
 	if (m->oargs.nsargs < 6)
 		objerror(m, USER, "bad # arguments");
+	obj = objndx(m);
 	for (i = 0; i < 2; i++)
-		if (!strcmp(sa[i], VOIDID))
+		if (!strcmp(m->oargs.sarg[i], VOIDID))
 			mod[i] = OVOID;
-		else if ((mod[i] = modifier(sa[i])) == OVOID) {
-			sprintf(errmsg, "undefined modifier \"%s\"", sa[i]);
+		else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
+			sprintf(errmsg, "undefined modifier \"%s\"",
+					m->oargs.sarg[i]);
 			objerror(m, USER, errmsg);
 		}
-	funcfile(sa[4]);
-	for (i = 0; i+5 < m->oargs.nsargs &&
-			sa[i+5][0] != '-'; i++) {
-		if (i >= MAXDIM)
-			objerror(m, USER, "dimension error");
-		errno = 0;
-		pt[i] = varvalue(sa[i+5]);
+	dp = getdata(m->oargs.sarg[3]);
+	i = (1 << dp->nd) - 1;
+	mf = getfunc(m, 4, i<<5, 0);
+	setfunc(m, r);
+	errno = 0;
+	for (i = 0; i < dp->nd; i++) {
+		pt[i] = evalue(mf->ep[i]);
 		if (errno)
 			goto computerr;
 	}
-	dp = getdata(sa[3]);
-	if (dp->nd != i)
-		objerror(m, USER, "dimension error");
 	coef = datavalue(dp, pt);
 	errno = 0;
-	coef = funvalue(sa[2], 1, &coef);
+	coef = funvalue(m->oargs.sarg[2], 1, &coef);
 	if (errno)
 		goto computerr;
-	raymixture(r, mod[0], mod[1], coef);
-	return;
-
+	if (raymixture(r, mod[0], mod[1], coef)) {
+		if (m->omod != OVOID)
+			objerror(m, USER, "inappropriate modifier");
+		return(1);
+	}
+	return(0);
 computerr:
 	objerror(m, WARNING, "compute error");
+	return(0);
 }