From db25e21fde7f82bd5b389d3ee045093488b82a28 Mon Sep 17 00:00:00 2001
From: "erwin.coumans" <erwin.coumans@08e121b0-ae19-0410-a57b-3be3395fd4fd>
Date: Mon, 21 Dec 2009 23:13:11 +0000
Subject: [PATCH] added isZero and fuzzyZero to btVector3 Thanks jazztickets
 for the report, see Issue 145

---
 src/LinearMath/btVector3.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/LinearMath/btVector3.h b/src/LinearMath/btVector3.h
index f053a87d0..7689f1de5 100644
--- a/src/LinearMath/btVector3.h
+++ b/src/LinearMath/btVector3.h
@@ -320,6 +320,17 @@ public:
 			setValue(btScalar(0.),btScalar(0.),btScalar(0.));
 		}
 
+		SIMD_FORCE_INLINE bool isZero() const 
+		{
+			return m_floats[0] == btScalar(0) && m_floats[1] == btScalar(0) && m_floats[2] == btScalar(0);
+		}
+
+		SIMD_FORCE_INLINE bool fuzzyZero() const 
+		{
+			return length2() < SIMD_EPSILON;
+		}
+
+
 		SIMD_FORCE_INLINE	void	serialize(struct	btVector3Data& dataOut) const;
 
 		SIMD_FORCE_INLINE	void	deSerialize(const struct	btVector3Data& dataIn);