From e1c9b67ef79d73b9927fcf76d8a2ccab4a6f64f0 Mon Sep 17 00:00:00 2001
From: "erwin.coumans" <erwin.coumans@08e121b0-ae19-0410-a57b-3be3395fd4fd>
Date: Mon, 12 Dec 2011 16:52:52 +0000
Subject: [PATCH] reduce dynamic memory allocations in btDbvt::rayTestInternal,
 fixes Issue 574, thanks to Anton Breusov

---
 src/BulletCollision/BroadphaseCollision/btDbvt.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/BulletCollision/BroadphaseCollision/btDbvt.h b/src/BulletCollision/BroadphaseCollision/btDbvt.h
index 2bb8ef5d2..409da80ae 100644
--- a/src/BulletCollision/BroadphaseCollision/btDbvt.h
+++ b/src/BulletCollision/BroadphaseCollision/btDbvt.h
@@ -259,6 +259,7 @@ struct	btDbvt
 
 	
 	btAlignedObjectArray<sStkNN>	m_stkStack;
+	mutable btAlignedObjectArray<const btDbvtNode*>	m_rayTestStack;
 
 
 	// Methods
@@ -955,7 +956,7 @@ inline void		btDbvt::rayTestInternal(	const btDbvtNode* root,
 
 		int								depth=1;
 		int								treshold=DOUBLE_STACKSIZE-2;
-		btAlignedObjectArray<const btDbvtNode*>	stack;
+		btAlignedObjectArray<const btDbvtNode*>&	stack = m_rayTestStack;
 		stack.resize(DOUBLE_STACKSIZE);
 		stack[0]=root;
 		btVector3 bounds[2];