--- ray/src/gen/genrev.c	1989/02/02 11:16:29	1.1
+++ ray/src/gen/genrev.c	1990/03/07 11:14:40	1.5
@@ -1,8 +1,10 @@
-/*
-
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
 #endif
+
+/* Copyright (c) 1989 Regents of the University of California */
+
+/*
  *  genrev.c - program to generate functions of rotation about z
  *
  *	The program takes as input the functions of t for z and r
@@ -26,7 +28,7 @@ static char SCCSid[] = "$SunId$ LBL";
 #define  UP		04
 #define  DOWN		010
 
-double  funvalue(), l_hermite(), argument();
+double  funvalue(), l_hermite(), l_bezier(), l_bspline(), argument();
 
 
 main(argc, argv)
@@ -43,6 +45,8 @@ char  *argv[];
 
 	varset("PI", PI);
 	funset("hermite", 5, l_hermite);
+	funset("bezier", 5, l_bezier);
+	funset("bspline", 5, l_bspline);
 
 	if (argc < 6)
 		goto userror;
@@ -64,7 +68,7 @@ char  *argv[];
 	nseg = atoi(argv[5]);
 	if (nseg <= 0)
 		goto userror;
-	modname = smooth ? "phong" : argv[1];
+	modname = smooth ? "Phong" : argv[1];
 
 	printhead(argc, argv);
 
@@ -96,7 +100,7 @@ char  *argv[];
 		if (!orient)
 			goto endfor;
 		if (smooth) {
-			printf("\n%s texfunc phong\n", argv[1]);
+			printf("\n%s texfunc Phong\n", argv[1]);
 			printf("4 rev_dx rev_dy rev_dz rev.cal\n");
 			printf("0\n4\n");
 			if (orient&(UP|DOWN)) {
@@ -208,4 +212,30 @@ l_hermite()			
 		argument(2)*(-2.0*t+3.0)*t*t +
 		argument(3)*((t-2.0)*t+1.0)*t +
 		argument(4)*(t-1.0)*t*t );
+}
+
+
+double
+l_bezier()
+{
+	double  t;
+
+	t = argument(5);
+	return(	argument(1) * (1.+t*(-3.+t*(3.-t))) +
+		argument(2) * 3.*t*(1.+t*(-2.+t)) +
+		argument(3) * 3.*t*t*(1.-t) +
+		argument(4) * t*t*t );
+}
+
+
+double
+l_bspline()
+{
+	double  t;
+
+	t = argument(5);
+	return(	argument(1) * (1./6.+t*(-1./2.+t*(1./2.-1./6.*t))) +
+		argument(2) * (2./3.+t*t*(-1.+1./2.*t)) +
+		argument(3) * (1./6.+t*(1./2.+t*(1./2.-1./2.*t))) +
+		argument(4) * (1./6.*t*t*t) );
 }