--- ray/src/rt/noise3.c	1991/11/12 17:09:23	2.1
+++ ray/src/rt/noise3.c	1993/08/09 10:03:45	2.4
@@ -14,6 +14,7 @@ static char SCCSid[] = "$SunId$ LBL";
  *     5/19/88	Added fractal noise function
  */
 
+#include  <math.h>
 
 #define  A		0
 #define  B		1
@@ -40,11 +41,12 @@ static char  fnoise_name[] = "fnoise3";
 static char  hermite_name[] = "hermite";
 
 double  *noise3(), fnoise3(), argument(), frand();
+static  interpolate();
 
 static long  xlim[3][2];
 static double  xarg[3];
 
-#define  EPSILON	.0001		/* error allowed in fractal */
+#define  EPSILON	.001		/* error allowed in fractal */
 
 #define  frand3(x,y,z)	frand(17*(x)+23*(y)+29*(z))
 
@@ -99,7 +101,6 @@ double *
 noise3(xnew)			/* compute the noise function */
 register double  xnew[3];
 {
-	extern double  floor();
 	static double  x[3] = {-100000.0, -100000.0, -100000.0};
 	static double  f[4];
 
@@ -156,7 +157,6 @@ double
 fnoise3(p)			/* compute fractal noise function */
 double  p[3];
 {
-	double  floor();
 	long  t[3], v[3], beg[3];
 	double  fval[8], fc;
 	int  branch;