From 957f8d9d70b4c8644da44890f17029a36cf18804 Mon Sep 17 00:00:00 2001
From: mattijs <mattijs>
Date: Wed, 15 Dec 2010 15:35:50 +0000
Subject: [PATCH] COMP: transform : split off operations

---
 src/OpenFOAM/primitives/transform/transform.H | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/OpenFOAM/primitives/transform/transform.H b/src/OpenFOAM/primitives/transform/transform.H
index 70e6821612..c880e05888 100644
--- a/src/OpenFOAM/primitives/transform/transform.H
+++ b/src/OpenFOAM/primitives/transform/transform.H
@@ -48,9 +48,11 @@ inline tensor rotationTensor
     const vector& n2
 )
 {
+    const scalar s = n1 & n2;
+    const vector n3 = n1 ^ n2;
     return
-        (n1 & n2)*I
-      + (1 - (n1 & n2))*sqr(n1 ^ n2)/(magSqr(n1 ^ n2) + VSMALL)
+        s*I
+      + (1 - s)*sqr(n3)/(magSqr(n3) + VSMALL)
       + (n2*n1 - n1*n2);
 }