From 2c2bb0426ceff2ddc9284b506102b967d768dadf Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Wed, 25 May 2011 17:50:51 +0200
Subject: PR gradient check

---
 src/utils.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/utils.h')

diff --git a/src/utils.h b/src/utils.h
index 4433023f..a11cd59e 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -140,6 +140,13 @@ static inline double angle_between(double x1, double y1, double z1,
 	return acos(cosine);
 }
 
+static inline int within_tolerance(double a, double b, double percent)
+{
+	double tol = a * (percent/100.0);
+	if ( fabs(b-a) < fabs(tol) ) return 1;
+	return 0;
+}
+
 
 /* ----------------------------- Useful macros ------------------------------ */
 
-- 
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