From 32b60cd2d711199885f06796de91ba4b64460325 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 4 Jun 2015 09:13:05 +0000
Subject: [PATCH] From Jannik Heller, Transform::computeBound() optimization.

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14894 16af8721-9629-0410-8352-f15c8da7e697
---
 src/osg/Transform.cpp | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/osg/Transform.cpp b/src/osg/Transform.cpp
index 9fa478f46..26321ff2e 100644
--- a/src/osg/Transform.cpp
+++ b/src/osg/Transform.cpp
@@ -178,17 +178,18 @@ BoundingSphere Transform::computeBound() const
     bsphere._center = bsphere._center*l2w;
 
     xdash -= bsphere._center;
-    osg::BoundingSphere::value_type len_xdash = xdash.length();
+    osg::BoundingSphere::value_type sqrlen_xdash = xdash.length2();
 
     ydash -= bsphere._center;
-    osg::BoundingSphere::value_type len_ydash = ydash.length();
+    osg::BoundingSphere::value_type sqrlen_ydash = ydash.length2();
 
     zdash -= bsphere._center;
-    osg::BoundingSphere::value_type len_zdash = zdash.length();
+    osg::BoundingSphere::value_type sqrlen_zdash = zdash.length2();
 
-    bsphere._radius = len_xdash;
-    if (bsphere._radius<len_ydash) bsphere._radius = len_ydash;
-    if (bsphere._radius<len_zdash) bsphere._radius = len_zdash;
+    bsphere._radius = sqrlen_xdash;
+    if (bsphere._radius<sqrlen_ydash) bsphere._radius = sqrlen_ydash;
+    if (bsphere._radius<sqrlen_zdash) bsphere._radius = sqrlen_zdash;
+    bsphere._radius = (osg::BoundingSphere::value_type)sqrt(bsphere._radius);
 
     return bsphere;