--- ray/src/common/zeroes.c	1989/02/02 10:41:51	1.1
+++ ray/src/common/zeroes.c	2003/07/17 09:21:29	2.5
@@ -1,24 +1,25 @@
-/* Copyright (c) 1986 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: zeroes.c,v 2.5 2003/07/17 09:21:29 schorsch Exp $";
 #endif
-
 /*
  *  zeroes.c - compute roots for various equations.
  *
- *     8/19/85
+ *  External symbols declared in standard.h
  */
 
-#define  FTINY		1e-7
+#include "copyright.h"
 
 
+#include  <math.h>
+
+#include  "fvect.h"
+#include  "rtmath.h"
+
 int
 quadratic(r, a, b, c)		/* find real roots of quadratic equation */
 double  *r;			/* roots in ascending order */
 double  a, b, c; 
 {
-	double  fabs(), sqrt();
 	double  disc;
 	int  first;